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Read RSS high watermark

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The value is read from /proc/PID/status or memory.max_usage_in_bytes (for devices with per-app memcg enabled).

Reading the value takes about 2ms per process.
Full snapshot taken by statsd is around 300ms.

Results: https://docs.google.com/spreadsheets/d/1vG9ku8Uu8104CmKbO4cNeEKVeeByvHY--p0_dK1GAdA/edit?usp=sharing

Bug: 115477992
Test: atest FrameworksServicesTests
Change-Id: I87995cbd85085375ade685f29e986ba173f9693e
This commit is contained in:
Rafal Slawik
2018-09-12 13:04:30 +01:00
parent 4fee398440
commit aaf608959c
7 changed files with 150 additions and 18 deletions
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6
core/java/android/app/ProcessMemoryState.java
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@@ -32,10 +32,11 @@ public final class ProcessMemoryState implements Parcelable {
public final long rssInBytes;
public final long cacheInBytes;
public final long swapInBytes;
public final long rssHighWatermarkInBytes;
public ProcessMemoryState(int uid, String processName, int oomScore, long pgfault,
long pgmajfault, long rssInBytes, long cacheInBytes,
long swapInBytes) {
long swapInBytes, long rssHighWatermarkInBytes) {
this.uid = uid;
this.processName = processName;
this.oomScore = oomScore;
@@ -44,6 +45,7 @@ public final class ProcessMemoryState implements Parcelable {
this.rssInBytes = rssInBytes;
this.cacheInBytes = cacheInBytes;
this.swapInBytes = swapInBytes;
this.rssHighWatermarkInBytes = rssHighWatermarkInBytes;
}
private ProcessMemoryState(Parcel in) {
@@ -55,6 +57,7 @@ public final class ProcessMemoryState implements Parcelable {
rssInBytes = in.readLong();
cacheInBytes = in.readLong();
swapInBytes = in.readLong();
rssHighWatermarkInBytes = in.readLong();
}
public static final Creator<ProcessMemoryState> CREATOR = new Creator<ProcessMemoryState>() {
@@ -84,5 +87,6 @@ public final class ProcessMemoryState implements Parcelable {
parcel.writeLong(rssInBytes);
parcel.writeLong(cacheInBytes);
parcel.writeLong(swapInBytes);
parcel.writeLong(rssHighWatermarkInBytes);
}
}