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Merge "Add Debug.getRuntimeStat()."

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Hiroshi Yamauchi
2015-04-14 19:08:30 +00:00
committed by Gerrit Code Review
parent 8704ae464a 8b5a293d09
commit e38ee9df26
1 changed files with 90 additions and 0 deletions
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90
core/java/android/os/Debug.java
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@@ -34,6 +34,7 @@ import java.lang.annotation.Target;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.util.Map;
import org.apache.harmony.dalvik.ddmc.Chunk;
import org.apache.harmony.dalvik.ddmc.ChunkHandler;
@@ -1034,6 +1035,95 @@ href="{@docRoot}guide/developing/tools/traceview.html">Traceview: A Graphical Lo
VMDebug.resetAllocCount(VMDebug.KIND_ALL_COUNTS);
}
/**
* Returns the value of a particular runtime statistic or {@code null} if no
* such runtime statistic exists.
*
* <p>The following table lists the runtime statistics that the runtime supports.
* Note runtime statistics may be added or removed in a future API level.</p>
*
* <table>
* <thead>
* <tr>
* <th>Runtime statistic name</th>
* <th>Meaning</th>
* <th>Example</th>
* <th>Supported (API Levels)</th>
* </tr>
* </thead>
* <tbody>
* <tr>
* <td>art.gc.gc-count</td>
* <td>The number of garbage collection runs.</td>
* <td>{@code 164}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.gc-time</td>
* <td>The total duration of garbage collection runs in ms.</td>
* <td>{@code 62364}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.bytes-allocated</td>
* <td>The total number of bytes that the application allocated.</td>
* <td>{@code 1463948408}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.bytes-freed</td>
* <td>The total number of bytes that garbage collection reclaimed.</td>
* <td>{@code 1313493084}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.blocking-gc-count</td>
* <td>The number of blocking garbage collection runs.</td>
* <td>{@code 2}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.blocking-gc-time</td>
* <td>The total duration of blocking garbage collection runs in ms.</td>
* <td>{@code 804}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.gc-count-rate-histogram</td>
* <td>The histogram of the number of garbage collection runs per 10 seconds.</td>
* <td>{@code 0:34503,1:45350,2:11281,3:8088,4:43,5:8}</td>
* <td>23</td>
* </tr>
* <tr>
* <td>art.gc.blocking-gc-count-rate-histogram</td>
* <td>The histogram of the number of garbage collection runs per 10 seconds.</td>
* <td>{@code 0:99269,1:1,2:1}</td>
* <td>23</td>
* </tr>
* </tbody>
* </table>
*
* @param statName
* the name of the runtime statistic to look up.
* @return the value of the specified runtime statistic or {@code null} if the
* runtime statistic doesn't exist.
* @hide
*/
public static String getRuntimeStat(String statName) {
return VMDebug.getRuntimeStat(statName);
}
/**
* Returns a map of the names/values of the runtime statistics
* that {@link #getRuntimeStat()} supports.
*
* @return a map of the names/values of the supported runtime statistics.
* @hide
*/
public static Map<String, String> getRuntimeStats() {
return VMDebug.getRuntimeStats();
}
/**
* Returns the size of the native heap.
* @return The size of the native heap in bytes.