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Activity Manager changes the scheduling group of processes.

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The algorithm for this is currently very simple: all persistent processes are
always in the normal scheduling group, all other processes are normal if their
oom_adj is as good or better than VISIBLE, otherwise they are in the background
group.

Note that this currently results in a fair number of log messages about not
being able to change the group, since the system process does not have
permission to do so.  Once a kernel fix is in, these will go away and the code
will start working.
This commit is contained in:
Dianne Hackborn
2009-05-21 12:56:43 -07:00
parent c29df57e5a
commit 06de2ea752
5 changed files with 65 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
services/java/com/android/server/am/ActivityManagerService.java
View File

@@ -4733,6 +4733,7 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
app.thread = thread;
app.curAdj = app.setAdj = -100;
app.curSchedGroup = app.setSchedGroup = Process.THREAD_GROUP_DEFAULT;
app.forcingToForeground = null;
app.foregroundServices = false;
app.debugging = false;
@@ -8802,9 +8803,9 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
+ " #" + i + ":");
r.dump(pw, prefix + " ");
} else if (inclOomAdj) {
pw.println(String.format("%s%s #%2d: oom_adj=%3d %s",
pw.println(String.format("%s%s #%2d: adj=%3d/%d %s",
prefix, (r.persistent ? persistentLabel : normalLabel),
i, r.setAdj, r.toString()));
i, r.setAdj, r.setSchedGroup, r.toString()));
} else {
pw.println(String.format("%s%s #%2d: %s",
prefix, (r.persistent ? persistentLabel : normalLabel),
@@ -11830,7 +11831,10 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
}
app.curAdj = adj;
app.curSchedGroup = (adj > VISIBLE_APP_ADJ && !app.persistent)
? Process.THREAD_GROUP_BG_NONINTERACTIVE
: Process.THREAD_GROUP_DEFAULT;
return adj;
}
@@ -11975,6 +11979,28 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
return false;
}
}
if (app.setSchedGroup != app.curSchedGroup) {
app.setSchedGroup = app.curSchedGroup;
if (DEBUG_SWITCH || DEBUG_OOM_ADJ) Log.v(TAG,
"Setting process group of " + app.processName
+ " to " + app.curSchedGroup);
if (true) {
try {
Process.setProcessGroup(app.pid, app.curSchedGroup);
} catch (Exception e) {
Log.w(TAG, "Failed setting process group of " + app.pid
+ " to " + app.curSchedGroup);
}
}
if (false) {
if (app.thread != null) {
try {
app.thread.setSchedulingGroup(app.curSchedGroup);
} catch (RemoteException e) {
}
}
}
}
}
return true;

4
services/java/com/android/server/am/ProcessRecord.java
View File

@@ -56,6 +56,8 @@ class ProcessRecord implements Watchdog.PssRequestor {
int setRawAdj; // Last set OOM unlimited adjustment for this process
int curAdj; // Current OOM adjustment for this process
int setAdj; // Last set OOM adjustment for this process
int curSchedGroup; // Currently desired scheduling class
int setSchedGroup; // Last set to background scheduling class
boolean isForeground; // Is this app running the foreground UI?
boolean setIsForeground; // Running foreground UI when last set?
boolean foregroundServices; // Running any services that are foreground?
@@ -147,6 +149,8 @@ class ProcessRecord implements Watchdog.PssRequestor {
pw.print(" setRaw="); pw.print(setRawAdj);
pw.print(" cur="); pw.print(curAdj);
pw.print(" set="); pw.println(setAdj);
pw.print(prefix); pw.print("curSchedGroup="); pw.print(curSchedGroup);
pw.print(" setSchedGroup="); pw.println(setSchedGroup);
pw.print(prefix); pw.print("isForeground="); pw.print(isForeground);
pw.print(" setIsForeground="); pw.print(setIsForeground);
pw.print(" foregroundServices="); pw.print(foregroundServices);