Update Dalvik process state through VMRuntime.

We now update Dalvik's process state through VMRuntime when the
process state changes in ActivityThread. This is used to determine
when to do trimming and will be used to determine when to do
compaction in the near future.

Bug: 8981901

Change-Id: I5eea272ba4ec2d1ed789b058d6457cb3c1fcf777

1 files changed, 10 insertions, 2 deletions

diff --git a/core/java/android/app/ActivityThread.java b/core/java/android/app/ActivityThread.java
index df63ab3..23dc6dd 100644
--- a/core/java/android/app/ActivityThread.java
+++ b/core/java/android/app/ActivityThread.java
@@ -117,6 +117,7 @@ import libcore.io.EventLogger;
 import libcore.io.IoUtils;
 
 import dalvik.system.CloseGuard;
+import dalvik.system.VMRuntime;
 
 final class RemoteServiceException extends AndroidRuntimeException {
     public RemoteServiceException(String msg) {
@@ -1269,8 +1270,15 @@ public final class ActivityThread {
             synchronized (this) {
                 if (mLastProcessState != processState) {
                     mLastProcessState = processState;
-
-                    // Update Dalvik state here based on ActivityManager.PROCESS_STATE_* constants.
+                    // Update Dalvik state based on ActivityManager.PROCESS_STATE_* constants.
+                    final int DALVIK_PROCESS_STATE_JANK_PERCEPTIBLE = 0;
+                    final int DALVIK_PROCESS_STATE_JANK_IMPERCEPTIBLE = 1;
+                    int dalvikProcessState = DALVIK_PROCESS_STATE_JANK_IMPERCEPTIBLE;
+                    // TODO: Tune this since things like gmail sync are important background but not jank perceptible.
+                    if (processState <= ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND) {
+                        dalvikProcessState = DALVIK_PROCESS_STATE_JANK_PERCEPTIBLE;
+                    }
+                    VMRuntime.getRuntime().updateProcessState(dalvikProcessState);
                     if (false) {
                         Slog.i(TAG, "******************* PROCESS STATE CHANGED TO: " + processState
                                 + (fromIpc ? " (from ipc": ""));