diff --git a/services/core/java/com/android/server/cpu/CpuInfoReader.java b/services/core/java/com/android/server/cpu/CpuInfoReader.java
index 680829d2bfc30..b13d7533f29bb 100644
--- a/services/core/java/com/android/server/cpu/CpuInfoReader.java
+++ b/services/core/java/com/android/server/cpu/CpuInfoReader.java
@@ -20,6 +20,7 @@ import android.annotation.IntDef;
 import android.annotation.Nullable;
 import android.system.Os;
 import android.system.OsConstants;
+import android.util.ArrayMap;
 import android.util.SparseArray;
 import android.util.SparseIntArray;
 
@@ -46,8 +47,12 @@ public final class CpuInfoReader {
     private static final String CPUFREQ_DIR_PATH = "/sys/devices/system/cpu/cpufreq";
     private static final String POLICY_DIR_PREFIX = "policy";
     private static final String RELATED_CPUS_FILE = "related_cpus";
+    private static final String AFFECTED_CPUS_FILE = "affected_cpus";
+    private static final String CUR_CPUFREQ_FILE = "cpuinfo_cur_freq";
     private static final String MAX_CPUFREQ_FILE = "cpuinfo_max_freq";
+    private static final String CUR_SCALING_FREQ_FILE = "scaling_cur_freq";
     private static final String MAX_SCALING_FREQ_FILE = "scaling_max_freq";
+    private static final String TIME_IN_STATE_FILE = "stats/time_in_state";
     private static final String CPUSET_DIR_PATH = "/dev/cpuset";
     private static final String CPUSET_TOP_APP_DIR = "top-app";
     private static final String CPUSET_BACKGROUND_DIR = "background";
@@ -60,6 +65,8 @@ public final class CpuInfoReader {
                     + "(?<irqClockTicks>[0-9]+)\\s(?<softirqClockTicks>[0-9]+)\\s"
                     + "(?<stealClockTicks>[0-9]+)\\s(?<guestClockTicks>[0-9]+)\\s"
                     + "(?<guestNiceClockTicks>[0-9]+)");
+    private static final Pattern TIME_IN_STATE_PATTERN =
+            Pattern.compile("(?<freqKHz>[0-9]+)\\s(?<time>[0-9]+)");
     private static final long MILLIS_PER_JIFFY = 1000L / Os.sysconf(OsConstants._SC_CLK_TCK);
 
     @Retention(RetentionPolicy.SOURCE)
@@ -70,14 +77,16 @@ public final class CpuInfoReader {
     private @interface CpusetCategory{}
 
     private final File mCpusetDir;
-    private final File mCpuFreqDir;
-    private final File mProcStatFile;
     private final SparseIntArray mCpusetCategoriesByCpus = new SparseIntArray();
     private final SparseArray<Long> mMaxCpuFrequenciesByCpus = new SparseArray<>();
+    private final ArrayMap<String, ArrayMap<Long, Long>> mTimeInStateByPolicy = new ArrayMap<>();
 
+    private File mCpuFreqDir;
+    private File mProcStatFile;
     private File[] mCpuFreqPolicyDirs;
     private SparseArray<CpuUsageStats> mCumulativeCpuUsageStats = new SparseArray<>();
     private boolean mIsEnabled;
+    private boolean mHasTimeInStateFile;
 
     public CpuInfoReader() {
         this(new File(CPUSET_DIR_PATH), new File(CPUFREQ_DIR_PATH), new File(PROC_STAT_FILE_PATH));
@@ -115,6 +124,11 @@ public final class CpuInfoReader {
                     mCpuFreqDir.getAbsolutePath());
             return false;
         }
+
+        // The Kernel must be configured to generate the `time_in_state` file. If the Kernel is not
+        // configured to generate this file, this file won't be available for the entire system
+        // uptime. Thus, check for the presence of this file only during init.
+        mHasTimeInStateFile = new File(mCpuFreqPolicyDirs[0], TIME_IN_STATE_FILE).exists();
         mIsEnabled = true;
         return true;
     }
@@ -129,8 +143,44 @@ public final class CpuInfoReader {
             Slogf.e(TAG, "Failed to read latest CPU usage stats");
             return Collections.emptyList();
         }
-        // TODO(b/217422127): Read current CPU frequencies and populate the CpuInfo.
-        return Collections.emptyList();
+        SparseArray<Long> cpuFrequenciesByCpus = readCurrentCpuFrequencies();
+        List<CpuInfo> cpuInfos = new ArrayList<>();
+        for (int i = 0; i < cpuFrequenciesByCpus.size(); i++) {
+            int cpu = cpuFrequenciesByCpus.keyAt(i);
+            long curFrequency = cpuFrequenciesByCpus.valueAt(i);
+            if (!mMaxCpuFrequenciesByCpus.contains(cpu) || !latestCpuUsageStats.contains(cpu)) {
+                Slogf.w(TAG, "Missing max CPU frequency or CPU usage stats for CPU core %d", cpu);
+                continue;
+            }
+            int cpuCategories = mCpusetCategoriesByCpus.get(cpu, -1);
+            if (cpuCategories < 0) {
+                Slogf.w(TAG, "Missing cpuset information for CPU core %d", cpu);
+                continue;
+            }
+            cpuInfos.add(new CpuInfo(cpu, cpuCategories, curFrequency,
+                    mMaxCpuFrequenciesByCpus.get(cpu), latestCpuUsageStats.get(cpu)));
+        }
+        return cpuInfos;
+    }
+
+    @VisibleForTesting
+    void setCpuFreqDir(File cpuFreqDir) {
+        File[] cpuFreqPolicyDirs = cpuFreqDir.listFiles(
+                file -> file.isDirectory() && file.getName().startsWith(POLICY_DIR_PREFIX));
+        if (mCpuFreqPolicyDirs == null || mCpuFreqPolicyDirs.length == 0) {
+            Slogf.w(TAG, "Failed to set CPU frequency directory. Missing policy directories at %s",
+                    mCpuFreqDir.getAbsolutePath());
+            return;
+        }
+        mCpuFreqDir = cpuFreqDir;
+        mCpuFreqPolicyDirs = cpuFreqPolicyDirs;
+        Slogf.i(TAG, "Set CPU frequency directory to %s", cpuFreqDir.getAbsolutePath());
+    }
+
+    @VisibleForTesting
+    void setProcStatFile(File procStatFile) {
+        mProcStatFile = procStatFile;
+        Slogf.i(TAG, "Set proc stat file to %s", procStatFile.getAbsolutePath());
     }
 
     private void readCpusetCategories() {
@@ -192,6 +242,77 @@ public final class CpuInfoReader {
                 : readCpuFreqKHz(new File(policyDir, MAX_SCALING_FREQ_FILE));
     }
 
+    private SparseArray<Long> readCurrentCpuFrequencies() {
+        SparseArray<Long> curCpuFrequenciesByCpus = new SparseArray<>();
+        for (int i = 0; i < mCpuFreqPolicyDirs.length; i++) {
+            File policyDir = mCpuFreqPolicyDirs[i];
+            long curCpuFreqKHz = readCurrentCpuFrequency(policyDir);
+            if (curCpuFreqKHz == 0) {
+                Slogf.w(TAG, "Missing current frequency information at %s",
+                        policyDir.getAbsolutePath());
+                continue;
+            }
+            File cpuCoresFile = new File(policyDir, AFFECTED_CPUS_FILE);
+            List<Integer> cpuCores = readCpuCores(cpuCoresFile);
+            if (cpuCores.isEmpty()) {
+                Slogf.e(TAG, "Failed to read CPU cores from %s", cpuCoresFile.getAbsolutePath());
+                continue;
+            }
+            for (int j = 0; j < cpuCores.size(); j++) {
+                curCpuFrequenciesByCpus.append(cpuCores.get(j), curCpuFreqKHz);
+            }
+        }
+        return curCpuFrequenciesByCpus;
+    }
+
+    private long readCurrentCpuFrequency(File policyDir) {
+        ArrayMap<Long, Long> latestTimeInState = readTimeInState(policyDir);
+        if (latestTimeInState == null) {
+            long curCpuFreqKHz = readCpuFreqKHz(new File(policyDir, CUR_CPUFREQ_FILE));
+            return curCpuFreqKHz > 0 ? curCpuFreqKHz :
+                    readCpuFreqKHz(new File(policyDir, CUR_SCALING_FREQ_FILE));
+        }
+        String policyDirName = policyDir.getName();
+        if (mTimeInStateByPolicy.containsKey(policyDirName)) {
+            ArrayMap<Long, Long> prevTimeInState = mTimeInStateByPolicy.get(policyDirName);
+            ArrayMap<Long, Long> deltaTimeInState =
+                    calculateDeltaTimeInState(prevTimeInState, latestTimeInState);
+            mTimeInStateByPolicy.put(policyDirName, latestTimeInState);
+            return calculateAvgCpuFreq(deltaTimeInState);
+        }
+        mTimeInStateByPolicy.put(policyDirName, latestTimeInState);
+        return calculateAvgCpuFreq(latestTimeInState);
+    }
+
+    @Nullable
+    private ArrayMap<Long, Long> readTimeInState(File policyDir) {
+        if (!mHasTimeInStateFile) {
+            return null;
+        }
+        File timeInStateFile = new File(policyDir, TIME_IN_STATE_FILE);
+        try {
+            List<String> lines = Files.readAllLines(timeInStateFile.toPath());
+            if (lines.isEmpty()) {
+                Slogf.w(TAG, "Empty time in state file at %s", timeInStateFile.getAbsolutePath());
+                return null;
+            }
+            ArrayMap<Long, Long> cpuTimeByFrequencies = new ArrayMap<>();
+            for (int i = 0; i < lines.size(); i++) {
+                Matcher m = TIME_IN_STATE_PATTERN.matcher(lines.get(i).trim());
+                if (!m.find()) {
+                    continue;
+                }
+                cpuTimeByFrequencies.put(Long.parseLong(m.group("freqKHz")),
+                        jiffyStrToMillis(m.group("time")));
+            }
+            return cpuTimeByFrequencies;
+        } catch (Exception e) {
+            Slogf.e(TAG, e, "Failed to read CPU time in state from file: %s",
+                    timeInStateFile.getAbsolutePath());
+        }
+        return null;
+    }
+
     private static long readCpuFreqKHz(File file) {
         if (!file.exists()) {
             Slogf.e(TAG, "CPU frequency file %s doesn't exist", file.getAbsolutePath());
@@ -209,6 +330,37 @@ public final class CpuInfoReader {
         return 0;
     }
 
+    private static ArrayMap<Long, Long> calculateDeltaTimeInState(
+            ArrayMap<Long, Long> prevTimeInState, ArrayMap<Long, Long> latestTimeInState) {
+        ArrayMap<Long, Long> deltaTimeInState = new ArrayMap();
+        for (int i = 0; i < latestTimeInState.size(); i++) {
+            long freq = latestTimeInState.keyAt(i);
+            long durationMillis = latestTimeInState.valueAt(i);
+            long deltaDurationMillis;
+            if (prevTimeInState.containsKey(freq)) {
+                long prevDurationMillis = prevTimeInState.get(freq);
+                deltaDurationMillis = durationMillis > prevDurationMillis
+                        ? (durationMillis - prevDurationMillis) : durationMillis;
+            } else {
+                deltaDurationMillis = durationMillis;
+            }
+            deltaTimeInState.put(freq, deltaDurationMillis);
+        }
+        return deltaTimeInState;
+    }
+
+    private static long calculateAvgCpuFreq(ArrayMap<Long, Long> timeInState) {
+        double totalTimeInState = 0;
+        for (int i = 0; i < timeInState.size(); i++) {
+            totalTimeInState += timeInState.valueAt(i);
+        }
+        double avgFreqKHz = 0;
+        for (int i = 0; i < timeInState.size(); i++) {
+            avgFreqKHz += (timeInState.keyAt(i) * timeInState.valueAt(i)) / totalTimeInState;
+        }
+        return (long) avgFreqKHz;
+    }
+
     /**
      * Reads the list of CPU cores from the given file.
      *
@@ -282,7 +434,7 @@ public final class CpuInfoReader {
                 if (!m.find()) {
                     continue;
                 }
-                cpuUsageStats.append(Integer.parseInt(Objects.requireNonNull(m.group("core"))),
+                cpuUsageStats.append(Integer.parseInt(m.group("core")),
                         new CpuUsageStats(jiffyStrToMillis(m.group("userClockTicks")),
                                 jiffyStrToMillis(m.group("niceClockTicks")),
                                 jiffyStrToMillis(m.group("sysClockTicks")),
@@ -302,7 +454,7 @@ public final class CpuInfoReader {
     }
 
     private static long jiffyStrToMillis(String jiffyStr) {
-        return Long.parseLong(Objects.requireNonNull(jiffyStr)) * MILLIS_PER_JIFFY;
+        return Long.parseLong(jiffyStr) * MILLIS_PER_JIFFY;
     }
 
     /** Contains information for each CPU core on the system. */
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/affected_cpus
new file mode 100644
index 0000000000000..87209ba23e97b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/affected_cpus
@@ -0,0 +1 @@
+0-
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..80b164d85baaa
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_cur_freq
@@ -0,0 +1 @@
+"1.23
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_max_freq
new file mode 100644
index 0000000000000..582d8c8b83789
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/cpuinfo_max_freq
@@ -0,0 +1 @@
++2.5
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/related_cpus
new file mode 100644
index 0000000000000..87209ba23e97b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/related_cpus
@@ -0,0 +1 @@
+0-
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_cur_freq
new file mode 100644
index 0000000000000..2142470504f03
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_cur_freq
@@ -0,0 +1 @@
+ 0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_max_freq
new file mode 100644
index 0000000000000..2142470504f03
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy0/scaling_max_freq
@@ -0,0 +1 @@
+ 0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/affected_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/affected_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..d4f015c68e409
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_cur_freq
@@ -0,0 +1 @@
+3000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_max_freq
new file mode 100644
index 0000000000000..749fce669df1b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/cpuinfo_max_freq
@@ -0,0 +1 @@
+1000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/related_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy1/related_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/affected_cpus
new file mode 100644
index 0000000000000..6792fa366029d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/affected_cpus
@@ -0,0 +1,2 @@
+ 2,
+ 3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/cpuinfo_max_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/related_cpus
new file mode 100644
index 0000000000000..6792fa366029d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/related_cpus
@@ -0,0 +1,2 @@
+ 2,
+ 3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_cur_freq
new file mode 100644
index 0000000000000..e2c709dc32a0b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_cur_freq
@@ -0,0 +1 @@
+ 9
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_max_freq
new file mode 100644
index 0000000000000..671900d5f1a36
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpufreq/policy2/scaling_max_freq
@@ -0,0 +1 @@
+ 2
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/background/cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/background/cpus
new file mode 100644
index 0000000000000..f88e3f5e225c6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/background/cpus
@@ -0,0 +1,2 @@
+ 2,
+-3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/top-app/cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/top-app/cpus
new file mode 100644
index 0000000000000..c7e8959edd067
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_cpuset/top-app/cpus
@@ -0,0 +1,2 @@
+ 0-
+ 1-2-3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_proc_stat b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_proc_stat
new file mode 100644
index 0000000000000..a210fc745f910
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/corrupted_proc_stat
@@ -0,0 +1,12 @@
+cpu  6119889 1575038 10623107 81174407 250978 2293369 192710 16073 0 0
+cpu0 3224961 795093 5222705 40903695 132281 814674 42897 8195 0 0
+cpu1 2894928 779945 5400402 40270712 118696 1478694 149813 7878 0 0
+cpu2 2895928 corrupted 40271712 116696 1479694 147813 8878 0 0
+cpu3 3234961 785093 5212705 40913695 133281 813674 corrupted
+intr 1411620772 49 19 0 0 4 0 0 0 1 0 0 1497 3 0 0 0 1 0 0 0 0 459002 0 0 19479985 0 30742819 0 1 0 22977745 0 79 0 10 0 1578 2077 0 207913133 0 53571 0 43 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 142749 719664 0 4096981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+ctxt 3289727889
+btime 1648158254
+processes 7700412
+procs_running 1
+procs_blocked 0
+softirq 190070910 9 21017845 30017 4408 64129752 0 672853 46618585 0 57597441
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/affected_cpus
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/affected_cpus
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..dadd9737778df
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1230000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_max_freq
new file mode 100644
index 0000000000000..a93d6f7b2c09a
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/cpuinfo_max_freq
@@ -0,0 +1 @@
+2500000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/related_cpus
new file mode 100644
index 0000000000000..c227083464fb9
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/related_cpus
@@ -0,0 +1 @@
+0
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_cur_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_cur_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_max_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/scaling_max_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/stats/time_in_state
new file mode 100644
index 0000000000000..5121f6661a7e0
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy0/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 500
+350000 500
+500000 1000
+2500000 100
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/affected_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/affected_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..2bc4ce96ec986
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1450000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_max_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/cpuinfo_max_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/related_cpus
new file mode 100644
index 0000000000000..56a6051ca2b02
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/related_cpus
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/stats/time_in_state
new file mode 100644
index 0000000000000..7ed12cfce58d1
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy1/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 500
+350000 500
+500000 1000
+2800000 100
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/affected_cpus
new file mode 100644
index 0000000000000..06717bdd7f356
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/affected_cpus
@@ -0,0 +1 @@
+2,3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/cpuinfo_max_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/related_cpus
new file mode 100644
index 0000000000000..82e6fae8cbf07
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/related_cpus
@@ -0,0 +1 @@
+2-3
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_cur_freq
new file mode 100644
index 0000000000000..749fce669df1b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_cur_freq
@@ -0,0 +1 @@
+1000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_max_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/scaling_max_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/stats/time_in_state
new file mode 100644
index 0000000000000..58ad62fef2e29
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state/policy2/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 500
+350000 500
+500000 1000
+2000000 100
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/affected_cpus
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/affected_cpus
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..749fce669df1b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_max_freq
new file mode 100644
index 0000000000000..a93d6f7b2c09a
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/cpuinfo_max_freq
@@ -0,0 +1 @@
+2500000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_cur_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_cur_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_max_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/scaling_max_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/stats/time_in_state
new file mode 100644
index 0000000000000..485556be3d164
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy0/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 1500
+350000 1500
+500000 2000
+2500000 200
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/affected_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/affected_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_cur_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_max_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/cpuinfo_max_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/stats/time_in_state
new file mode 100644
index 0000000000000..68564dc0e2c7f
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy1/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 1500
+350000 1500
+500000 2000
+2800000 200
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/affected_cpus
new file mode 100644
index 0000000000000..06717bdd7f356
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/affected_cpus
@@ -0,0 +1 @@
+2,3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/cpuinfo_max_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_cur_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_cur_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_max_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/scaling_max_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/stats/time_in_state b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/stats/time_in_state
new file mode 100644
index 0000000000000..3c735d8d04ae2
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_with_time_in_state_2/policy2/stats/time_in_state
@@ -0,0 +1,4 @@
+200000 1500
+350000 1500
+500000 2000
+2000000 200
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/affected_cpus
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/affected_cpus
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..dadd9737778df
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1230000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_max_freq
new file mode 100644
index 0000000000000..a93d6f7b2c09a
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/cpuinfo_max_freq
@@ -0,0 +1 @@
+2500000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/related_cpus
new file mode 100644
index 0000000000000..c227083464fb9
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/related_cpus
@@ -0,0 +1 @@
+0
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_cur_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_cur_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_max_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy0/scaling_max_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/affected_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/affected_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..2bc4ce96ec986
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1450000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_max_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/cpuinfo_max_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/related_cpus
new file mode 100644
index 0000000000000..56a6051ca2b02
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy1/related_cpus
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/affected_cpus
new file mode 100644
index 0000000000000..06717bdd7f356
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/affected_cpus
@@ -0,0 +1 @@
+2,3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/cpuinfo_max_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/related_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/related_cpus
new file mode 100644
index 0000000000000..82e6fae8cbf07
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/related_cpus
@@ -0,0 +1 @@
+2-3
\ No newline at end of file
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_cur_freq
new file mode 100644
index 0000000000000..749fce669df1b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_cur_freq
@@ -0,0 +1 @@
+1000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_max_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state/policy2/scaling_max_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/affected_cpus
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/affected_cpus
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..749fce669df1b
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_cur_freq
@@ -0,0 +1 @@
+1000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_max_freq
new file mode 100644
index 0000000000000..a93d6f7b2c09a
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/cpuinfo_max_freq
@@ -0,0 +1 @@
+2500000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_cur_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_cur_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_max_freq
new file mode 100644
index 0000000000000..573541ac9702d
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy0/scaling_max_freq
@@ -0,0 +1 @@
+0
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/affected_cpus
new file mode 100644
index 0000000000000..d00491fd7e5bb
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/affected_cpus
@@ -0,0 +1 @@
+1
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_cur_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_max_freq
new file mode 100644
index 0000000000000..c754f1a461ab6
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy1/cpuinfo_max_freq
@@ -0,0 +1 @@
+2800000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/affected_cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/affected_cpus
new file mode 100644
index 0000000000000..06717bdd7f356
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/affected_cpus
@@ -0,0 +1 @@
+2,3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/cpuinfo_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/cpuinfo_cur_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/cpuinfo_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/cpuinfo_max_freq
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_cur_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_cur_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_cur_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_max_freq b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_max_freq
new file mode 100644
index 0000000000000..deebb18c2f77e
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpufreq_without_time_in_state_2/policy2/scaling_max_freq
@@ -0,0 +1 @@
+2000000
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/background/cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/background/cpus
new file mode 100644
index 0000000000000..4792e70f33307
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/background/cpus
@@ -0,0 +1,2 @@
+2
+3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/top-app/cpus b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/top-app/cpus
new file mode 100644
index 0000000000000..40c7bb2f1a2a5
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_cpuset/top-app/cpus
@@ -0,0 +1 @@
+0-3
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat
new file mode 100644
index 0000000000000..51683363e9b54
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat
@@ -0,0 +1,12 @@
+cpu  6119889 1575038 10623107 81174407 250978 2293369 192710 16073 0 0
+cpu0 3224961 795093 5222705 40903695 132281 814674 42897 8195 0 0
+cpu1 2894928 779945 5400402 40270712 118696 1478694 149813 7878 0 0
+cpu2 2895928 778945 5401402 40271712 116696 1479694 147813 8878 0 0
+cpu3 3234961 785093 5212705 40913695 133281 813674 43897 7195 0 0
+intr 1411620772 49 19 0 0 4 0 0 0 1 0 0 1497 3 0 0 0 1 0 0 0 0 459002 0 0 19479985 0 30742819 0 1 0 22977745 0 79 0 10 0 1578 2077 0 207913133 0 53571 0 43 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 142749 719664 0 4096981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+ctxt 3289727889
+btime 1648158254
+processes 7700412
+procs_running 1
+procs_blocked 0
+softirq 190070910 9 21017845 30017 4408 64129752 0 672853 46618585 0 57597441
diff --git a/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat_2 b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat_2
new file mode 100644
index 0000000000000..20c3082e58150
--- /dev/null
+++ b/services/tests/mockingservicestests/assets/CpuInfoReaderTest/valid_proc_stat_2
@@ -0,0 +1,12 @@
+cpu  6119889 1575038 10623107 81174407 250978 2293369 192710 16073 0 0
+cpu0 4224961 895093 6222705 51903695 242281 954674 50897 10295 0 0
+cpu1 2984928 879945 6400402 40370712 127696 1498694 159813 17878 0 0
+cpu2 3895928 978945 5401402 41271712 216696 3479694 247813 18878 0 0
+cpu3 3434961 885093 5312705 40923695 143281 823674 143897 7295 0 0
+intr 1411620772 49 19 0 0 4 0 0 0 1 0 0 1497 3 0 0 0 1 0 0 0 0 459002 0 0 19479985 0 30742819 0 1 0 22977745 0 79 0 10 0 1578 2077 0 207913133 0 53571 0 43 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 142749 719664 0 4096981 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
+ctxt 3289727889
+btime 1648158254
+processes 7700412
+procs_running 1
+procs_blocked 0
+softirq 190070910 9 21017845 30017 4408 64129752 0 672853 46618585 0 57597441
diff --git a/services/tests/mockingservicestests/src/com/android/server/cpu/CpuInfoReaderTest.java b/services/tests/mockingservicestests/src/com/android/server/cpu/CpuInfoReaderTest.java
new file mode 100644
index 0000000000000..81af775a458c6
--- /dev/null
+++ b/services/tests/mockingservicestests/src/com/android/server/cpu/CpuInfoReaderTest.java
@@ -0,0 +1,445 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.cpu;
+
+import static com.android.server.cpu.CpuInfoReader.FLAG_CPUSET_CATEGORY_BACKGROUND;
+import static com.android.server.cpu.CpuInfoReader.FLAG_CPUSET_CATEGORY_TOP_APP;
+
+import static com.google.common.truth.Truth.assertWithMessage;
+
+import android.content.Context;
+import android.content.res.AssetManager;
+import android.util.Slog;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.ExtendedMockitoTestCase;
+
+import libcore.io.Streams;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.junit.MockitoJUnitRunner;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * <p>This class contains unit tests for the {@link CpuInfoReader}.
+ */
+@RunWith(MockitoJUnitRunner.class)
+public final class CpuInfoReaderTest extends ExtendedMockitoTestCase {
+    private static final String TAG = CpuInfoReaderTest.class.getSimpleName();
+    private static final String ROOT_DIR_NAME = "CpuInfoReaderTest";
+    private static final String VALID_CPUSET_DIR = "valid_cpuset";
+    private static final String VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR =
+            "valid_cpufreq_with_time_in_state";
+    private static final String VALID_CPUFREQ_WITH_TIME_IN_STATE_2_DIR =
+            "valid_cpufreq_with_time_in_state_2";
+    private static final String VALID_CPUFREQ_WITHOUT_TIME_IN_STATE_DIR =
+            "valid_cpufreq_without_time_in_state";
+    private static final String VALID_CPUFREQ_WITHOUT_TIME_IN_STATE_2_DIR =
+            "valid_cpufreq_without_time_in_state_2";
+    private static final String VALID_PROC_STAT = "valid_proc_stat";
+    private static final String VALID_PROC_STAT_2 = "valid_proc_stat_2";
+    private static final String CORRUPTED_CPUFREQ_DIR = "corrupted_cpufreq";
+    private static final String CORRUPTED_CPUSET_DIR = "corrupted_cpuset";
+    private static final String CORRUPTED_PROC_STAT = "corrupted_proc_stat";
+    private static final String EMPTY_DIR = "empty_dir";
+    private static final String EMPTY_FILE = "empty_file";
+
+    private final Context mContext =
+            InstrumentationRegistry.getInstrumentation().getTargetContext();
+    private final File mCacheRoot = new File(mContext.getCacheDir(), ROOT_DIR_NAME);
+    private final AssetManager mAssetManager = mContext.getAssets();
+
+    private CpuInfoReader mCpuInfoReader;
+
+    @Before
+    public void setUp() throws Exception {
+        copyAssets(ROOT_DIR_NAME, mContext.getCacheDir());
+        assertWithMessage("Cache root dir %s", mCacheRoot.getAbsolutePath())
+                .that(mCacheRoot.exists()).isTrue();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        if (!deleteDirectory(mCacheRoot)) {
+            Slog.e(TAG, "Failed to delete cache root directory " + mCacheRoot.getAbsolutePath());
+        }
+    }
+
+    @Test
+    public void testReadCpuInfoWithTimeInState() throws Exception {
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR),
+                getCacheFile(VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR), getCacheFile(VALID_PROC_STAT));
+        mCpuInfoReader.init();
+        List<CpuInfoReader.CpuInfo> actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        List<CpuInfoReader.CpuInfo> expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 488_095, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_249_610,
+                                /* niceTimeMillis= */ 7_950_930, /* systemTimeMillis= */ 52_227_050,
+                                /* idleTimeMillis= */ 409_036_950,
+                                /* iowaitTimeMillis= */ 1_322_810, /* irqTimeMillis= */ 8_146_740,
+                                /* softirqTimeMillis= */ 428_970, /* stealTimeMillis= */ 81_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 502_380, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_949_280,
+                                /* niceTimeMillis= */ 7_799_450, /* systemTimeMillis= */ 54_004_020,
+                                /* idleTimeMillis= */ 402_707_120,
+                                /* iowaitTimeMillis= */ 1_186_960, /* irqTimeMillis= */ 14_786_940,
+                                /* softirqTimeMillis= */ 1_498_130, /* stealTimeMillis= */ 78_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 464_285, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_959_280,
+                                /* niceTimeMillis= */ 7_789_450, /* systemTimeMillis= */ 54_014_020,
+                                /* idleTimeMillis= */ 402_717_120,
+                                /* iowaitTimeMillis= */ 1_166_960, /* irqTimeMillis= */ 14_796_940,
+                                /* softirqTimeMillis= */ 1_478_130, /* stealTimeMillis= */ 88_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 3,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 464_285, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_349_610,
+                                /* niceTimeMillis= */ 7_850_930, /* systemTimeMillis= */ 52_127_050,
+                                /* idleTimeMillis= */ 409_136_950,
+                                /* iowaitTimeMillis= */ 1_332_810, /* irqTimeMillis= */ 8_136_740,
+                                /* softirqTimeMillis= */ 438_970, /* stealTimeMillis= */ 71_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+
+        mCpuInfoReader.setCpuFreqDir(getCacheFile(VALID_CPUFREQ_WITH_TIME_IN_STATE_2_DIR));
+        mCpuInfoReader.setProcStatFile(getCacheFile(VALID_PROC_STAT_2));
+
+        actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 419_354, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 10_000_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 10_000_000,
+                                /* idleTimeMillis= */ 110_000_000,
+                                /* iowaitTimeMillis= */ 1_100_000, /* irqTimeMillis= */ 1_400_000,
+                                /* softirqTimeMillis= */ 80_000, /* stealTimeMillis= */ 21_000,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 429_032, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 900_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 10_000_000,
+                                /* idleTimeMillis= */ 1_000_000, /* iowaitTimeMillis= */ 90_000,
+                                /* irqTimeMillis= */ 200_000, /* softirqTimeMillis= */ 100_000,
+                                /* stealTimeMillis= */ 100_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 403_225, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 10_000_000,
+                                /* niceTimeMillis= */ 2_000_000, /* systemTimeMillis= */ 0,
+                                /* idleTimeMillis= */ 10_000_000, /* iowaitTimeMillis= */ 1_000_000,
+                                /* irqTimeMillis= */ 20_000_000, /* softirqTimeMillis= */ 1_000_000,
+                                /* stealTimeMillis= */ 100_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 3,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 403_225, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 2_000_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 1_000_000,
+                                /* idleTimeMillis= */ 100_000, /* iowaitTimeMillis= */ 100_000,
+                                /* irqTimeMillis= */ 100_000, /* softirqTimeMillis= */ 1_000_000,
+                                /* stealTimeMillis= */ 1_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Second snapshot of cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+    }
+
+    @Test
+    public void testReadCpuInfoWithoutTimeInState() throws Exception {
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR),
+                getCacheFile(VALID_CPUFREQ_WITHOUT_TIME_IN_STATE_DIR),
+                getCacheFile(VALID_PROC_STAT));
+        mCpuInfoReader.init();
+        List<CpuInfoReader.CpuInfo> actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        List<CpuInfoReader.CpuInfo> expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 1_230_000, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_249_610,
+                                /* niceTimeMillis= */ 7_950_930, /* systemTimeMillis= */ 52_227_050,
+                                /* idleTimeMillis= */ 409_036_950,
+                                /* iowaitTimeMillis= */ 1_322_810, /* irqTimeMillis= */ 8_146_740,
+                                /* softirqTimeMillis= */ 428_970, /* stealTimeMillis= */ 81_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 1_450_000, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_949_280,
+                                /* niceTimeMillis= */ 7_799_450, /* systemTimeMillis= */ 54_004_020,
+                                /* idleTimeMillis= */ 402_707_120,
+                                /* iowaitTimeMillis= */ 1_186_960, /* irqTimeMillis= */ 14_786_940,
+                                /* softirqTimeMillis= */ 1_498_130, /* stealTimeMillis= */ 78_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 1_000_000, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_959_280,
+                                /* niceTimeMillis= */ 7_789_450, /* systemTimeMillis= */ 54_014_020,
+                                /* idleTimeMillis= */ 402_717_120,
+                                /* iowaitTimeMillis= */ 1_166_960, /* irqTimeMillis= */ 14_796_940,
+                                /* softirqTimeMillis= */ 1_478_130, /* stealTimeMillis= */ 88_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 3,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 1_000_000, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_349_610,
+                                /* niceTimeMillis= */ 7_850_930, /* systemTimeMillis= */ 52_127_050,
+                                /* idleTimeMillis= */ 409_136_950,
+                                /* iowaitTimeMillis= */ 1_332_810, /* irqTimeMillis= */ 8_136_740,
+                                /* softirqTimeMillis= */ 438_970, /* stealTimeMillis= */ 71_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+
+        mCpuInfoReader.setCpuFreqDir(getCacheFile(VALID_CPUFREQ_WITHOUT_TIME_IN_STATE_2_DIR));
+        mCpuInfoReader.setProcStatFile(getCacheFile(VALID_PROC_STAT_2));
+
+        actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 1_000_000, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 10_000_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 10_000_000,
+                                /* idleTimeMillis= */ 110_000_000,
+                                /* iowaitTimeMillis= */ 1_100_000, /* irqTimeMillis= */ 1_400_000,
+                                /* softirqTimeMillis= */ 80_000, /* stealTimeMillis= */ 21_000,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 2_800_000, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 900_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 10_000_000,
+                                /* idleTimeMillis= */ 1_000_000, /* iowaitTimeMillis= */ 90_000,
+                                /* irqTimeMillis= */ 200_000, /* softirqTimeMillis= */ 100_000,
+                                /* stealTimeMillis= */ 100_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 2_000_000, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 10_000_000,
+                                /* niceTimeMillis= */ 2_000_000, /* systemTimeMillis= */ 0,
+                                /* idleTimeMillis= */ 10_000_000, /* iowaitTimeMillis= */ 1_000_000,
+                                /* irqTimeMillis= */ 20_000_000, /* softirqTimeMillis= */ 1_000_000,
+                                /* stealTimeMillis= */ 100_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 3,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 2_000_000, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 2_000_000,
+                                /* niceTimeMillis= */ 1_000_000, /* systemTimeMillis= */ 1_000_000,
+                                /* idleTimeMillis= */ 100_000, /* iowaitTimeMillis= */ 100_000,
+                                /* irqTimeMillis= */ 100_000, /* softirqTimeMillis= */ 1_000_000,
+                                /* stealTimeMillis= */ 1_000, /* guestTimeMillis= */ 0,
+                                /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Second snapshot of cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+    }
+
+    @Test
+    public void testReadCpuInfoWithCorruptedCpuset() throws Exception {
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(CORRUPTED_CPUSET_DIR),
+                getCacheFile(VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR),
+                getCacheFile(VALID_PROC_STAT));
+        mCpuInfoReader.init();
+        List<CpuInfoReader.CpuInfo> actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        List<CpuInfoReader.CpuInfo> expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 488_095, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_249_610,
+                                /* niceTimeMillis= */ 7_950_930, /* systemTimeMillis= */ 52_227_050,
+                                /* idleTimeMillis= */ 409_036_950,
+                                /* iowaitTimeMillis= */ 1_322_810, /* irqTimeMillis= */ 8_146_740,
+                                /* softirqTimeMillis= */ 428_970, /* stealTimeMillis= */ 81_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 502_380, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_949_280,
+                                /* niceTimeMillis= */ 7_799_450, /* systemTimeMillis= */ 54_004_020,
+                                /* idleTimeMillis= */ 402_707_120,
+                                /* iowaitTimeMillis= */ 1_186_960, /* irqTimeMillis= */ 14_786_940,
+                                /* softirqTimeMillis= */ 1_498_130, /* stealTimeMillis= */ 78_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 464_285, /* maxCpuFreqKHz= */ 2_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_959_280,
+                                /* niceTimeMillis= */ 7_789_450, /* systemTimeMillis= */ 54_014_020,
+                                /* idleTimeMillis= */ 402_717_120,
+                                /* iowaitTimeMillis= */ 1_166_960, /* irqTimeMillis= */ 14_796_940,
+                                /* softirqTimeMillis= */ 1_478_130, /* stealTimeMillis= */ 88_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+    }
+
+    @Test
+    public void testReadCpuInfoWithCorruptedCpufreq() throws Exception {
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR),
+                getCacheFile(CORRUPTED_CPUFREQ_DIR), getCacheFile(VALID_PROC_STAT));
+        mCpuInfoReader.init();
+        List<CpuInfoReader.CpuInfo> actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        List<CpuInfoReader.CpuInfo> expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 3_000_000, /* maxCpuFreqKHz= */ 1_000_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_949_280,
+                                /* niceTimeMillis= */ 7_799_450, /* systemTimeMillis= */ 54_004_020,
+                                /* idleTimeMillis= */ 402_707_120,
+                                /* iowaitTimeMillis= */ 1_186_960, /* irqTimeMillis= */ 14_786_940,
+                                /* softirqTimeMillis= */ 1_498_130, /* stealTimeMillis= */ 78_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 2,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 9, /* maxCpuFreqKHz= */ 2,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_959_280,
+                                /* niceTimeMillis= */ 7_789_450, /* systemTimeMillis= */ 54_014_020,
+                                /* idleTimeMillis= */ 402_717_120,
+                                /* iowaitTimeMillis= */ 1_166_960, /* irqTimeMillis= */ 14_796_940,
+                                /* softirqTimeMillis= */ 1_478_130, /* stealTimeMillis= */ 88_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 3,
+                        FLAG_CPUSET_CATEGORY_TOP_APP | FLAG_CPUSET_CATEGORY_BACKGROUND,
+                        /* curCpuFreqKHz= */ 9, /* maxCpuFreqKHz= */ 2,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_349_610,
+                                /* niceTimeMillis= */ 7_850_930, /* systemTimeMillis= */ 52_127_050,
+                                /* idleTimeMillis= */ 409_136_950,
+                                /* iowaitTimeMillis= */ 1_332_810, /* irqTimeMillis= */ 8_136_740,
+                                /* softirqTimeMillis= */ 438_970, /* stealTimeMillis= */ 71_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+    }
+
+    @Test
+    public void testReadCpuInfoCorruptedProcStat() throws Exception {
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR),
+                getCacheFile(VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR),
+                getCacheFile(CORRUPTED_PROC_STAT));
+        mCpuInfoReader.init();
+        List<CpuInfoReader.CpuInfo> actualCpuInfos = mCpuInfoReader.readCpuInfos();
+        List<CpuInfoReader.CpuInfo> expectedCpuInfos = List.of(
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 0, FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 488_095, /* maxCpuFreqKHz= */ 2_500_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 32_249_610,
+                                /* niceTimeMillis= */ 7_950_930, /* systemTimeMillis= */ 52_227_050,
+                                /* idleTimeMillis= */ 409_036_950,
+                                /* iowaitTimeMillis= */ 1_322_810, /* irqTimeMillis= */ 8_146_740,
+                                /* softirqTimeMillis= */ 428_970, /* stealTimeMillis= */ 81_950,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)),
+                new CpuInfoReader.CpuInfo(/* cpuCore= */ 1,
+                        FLAG_CPUSET_CATEGORY_TOP_APP,
+                        /* curCpuFreqKHz= */ 502_380, /* maxCpuFreqKHz= */ 2_800_000,
+                        new CpuInfoReader.CpuUsageStats(/* userTimeMillis= */ 28_949_280,
+                                /* niceTimeMillis= */ 7_799_450, /* systemTimeMillis= */ 54_004_020,
+                                /* idleTimeMillis= */ 402_707_120,
+                                /* iowaitTimeMillis= */ 1_186_960, /* irqTimeMillis= */ 14_786_940,
+                                /* softirqTimeMillis= */ 1_498_130, /* stealTimeMillis= */ 78_780,
+                                /* guestTimeMillis= */ 0, /* guestNiceTimeMillis= */ 0)));
+
+        assertWithMessage("Cpu infos").that(actualCpuInfos)
+                .containsExactlyElementsIn(expectedCpuInfos);
+    }
+
+    @Test
+    public void testReadCpuInfoWithEmptyCpuset() throws Exception {
+        File emptyDir = getCacheFile(EMPTY_DIR);
+        assertWithMessage("Make empty dir %s", emptyDir).that(emptyDir.mkdir()).isTrue();
+        mCpuInfoReader = new CpuInfoReader(emptyDir, getCacheFile(
+                VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR),
+                getCacheFile(VALID_PROC_STAT));
+
+        assertWithMessage("Init CPU reader info").that(mCpuInfoReader.init()).isFalse();
+
+        assertWithMessage("Cpu infos").that(mCpuInfoReader.readCpuInfos()).isEmpty();
+    }
+
+    @Test
+    public void testReadCpuInfoWithEmptyCpufreq() throws Exception {
+        File emptyDir = getCacheFile(EMPTY_DIR);
+        assertWithMessage("Make empty dir %s", emptyDir).that(emptyDir.mkdir()).isTrue();
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR), emptyDir,
+                getCacheFile(VALID_PROC_STAT));
+
+        assertWithMessage("Init CPU reader info").that(mCpuInfoReader.init()).isFalse();
+
+        assertWithMessage("Cpu infos").that(mCpuInfoReader.readCpuInfos()).isEmpty();
+    }
+
+    @Test
+    public void testReadCpuInfoWithEmptyProcStat() throws Exception {
+        File emptyFile = getCacheFile(EMPTY_FILE);
+        assertWithMessage("Create empty file %s", emptyFile).that(emptyFile.createNewFile())
+                .isTrue();
+        mCpuInfoReader = new CpuInfoReader(getCacheFile(VALID_CPUSET_DIR),
+                getCacheFile(VALID_CPUFREQ_WITH_TIME_IN_STATE_DIR), getCacheFile(EMPTY_FILE));
+
+        assertWithMessage("Cpu infos").that(mCpuInfoReader.readCpuInfos()).isEmpty();
+    }
+
+    private File getCacheFile(String assetName) {
+        return new File(mCacheRoot, assetName);
+    }
+
+    private void copyAssets(String assetPath, File targetRoot) throws Exception {
+        File target = new File(targetRoot, assetPath);
+        String[] assets = mAssetManager.list(assetPath);
+        if (assets == null || assets.length == 0) {
+            try (InputStream in = mAssetManager.open(assetPath);
+                 OutputStream out = new FileOutputStream(target)) {
+                Streams.copy(in, out);
+            }
+            return;
+        }
+        assertWithMessage("Make target directory %s", target).that(target.mkdir()).isTrue();
+        for (int i = 0; i < assets.length; i++) {
+            copyAssets(String.format("%s%s%s", assetPath, File.separator, assets[i]), targetRoot);
+        }
+    }
+
+    private static boolean deleteDirectory(File rootDir) {
+        if (!rootDir.exists() || !rootDir.isDirectory()) {
+            return false;
+        }
+        for (File file : Objects.requireNonNull(rootDir.listFiles())) {
+            if (file.isDirectory()) {
+                deleteDirectory(file);
+            } else if (!file.delete()) {
+                return false;
+            }
+        }
+        return rootDir.delete();
+    }
+}