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Merge "BatteryStats: Stop reading kernel memory stats when unvailable" into oc-dev

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TreeHugger Robot
2017-05-12 00:20:42 +00:00
committed by Android (Google) Code Review
parent 89d64cbbd9 61d2d37233
commit 120d7b219d
1 changed files with 13 additions and 1 deletions
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14
core/java/com/android/internal/os/KernelMemoryBandwidthStats.java
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@@ -8,6 +8,7 @@ import android.util.Slog;
import com.android.internal.annotations.VisibleForTesting;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
@@ -24,14 +25,25 @@ import java.io.IOException;
public class KernelMemoryBandwidthStats {
private static final String TAG = "KernelMemoryBandwidthStats";
final protected LongSparseLongArray mBandwidthEntries = new LongSparseLongArray();
private static final String mSysfsFile = "/sys/kernel/memory_state_time/show_stat";
private static final boolean DEBUG = false;
protected final LongSparseLongArray mBandwidthEntries = new LongSparseLongArray();
private boolean mStatsDoNotExist = false;
public void updateStats() {
if (mStatsDoNotExist) {
// Skip reading.
return;
}
StrictMode.ThreadPolicy policy = StrictMode.allowThreadDiskReads();
try (BufferedReader reader = new BufferedReader(new FileReader(mSysfsFile))) {
parseStats(reader);
} catch (FileNotFoundException e) {
Slog.w(TAG, "No kernel memory bandwidth stats available");
mBandwidthEntries.clear();
mStatsDoNotExist = true;
} catch (IOException e) {
Slog.e(TAG, "Failed to read memory bandwidth: " + e.getMessage());
mBandwidthEntries.clear();