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Commit 6c2a3667 authored by Jun Su's avatar Jun Su Committed by Steve Kondik
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ProcessList: use different polling interval when screen off 

We are using the same time interval for both screen off and screen on.
For process on top: ActivityManager.PROCESS_STATE_TOP, we will poll PSS
information every 120 sec.
During polling PSS, we are grep /proc/%d/smaps which is a 10k lines file.
This cost quite a lot of CPU resource. But when screen off, we don't need to update
TOP process PSS so frequently since we are not operating it. Lower polling
circle to every 15min to reduce power.

Change-Id: Ia4cd26290d44d066f034d5270ce5523650a3c493
parent dd439e8c

services/java/com/android/server/am/ProcessList.java

+18 −1
Original line number Diff line number Diff line
@@ -473,6 +473,23 @@ final class ProcessList { 
        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_CACHED_EMPTY

    };



    private static final long[] sSameSleepingPssTimes = new long[] {

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_PERSISTENT

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_PERSISTENT_UI

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_TOP

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_IMPORTANT_FOREGROUND

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_IMPORTANT_BACKGROUND

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_BACKUP

        PSS_SAME_IMPORTANT_INTERVAL,    // ActivityManager.PROCESS_STATE_HEAVY_WEIGHT

        PSS_SAME_SERVICE_INTERVAL,      // ActivityManager.PROCESS_STATE_SERVICE

        PSS_SAME_SERVICE_INTERVAL,      // ActivityManager.PROCESS_STATE_RECEIVER

        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_HOME

        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_LAST_ACTIVITY

        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY

        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_CACHED_ACTIVITY_CLIENT

        PSS_SAME_CACHED_INTERVAL,       // ActivityManager.PROCESS_STATE_CACHED_EMPTY

    };



    public static boolean procStatesDifferForMem(int procState1, int procState2) {

        return sProcStateToProcMem[procState1] != sProcStateToProcMem[procState2];

    }
@@ -482,7 +499,7 @@ final class ProcessList { 
        final long[] table = sleeping

                ? (first

                        ? sFirstAwakePssTimes

                        : sSameAwakePssTimes)

                        : sSameSleepingPssTimes)

                : (first

                        ? sFirstAwakePssTimes

                        : sSameAwakePssTimes);