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Commit f1f92ced authored by Chitti Babu Theegala's avatar Chitti Babu Theegala Committed by Steve Kondik
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lowmemorykiller: Overwrite LMK parameters for low-tier devices 

LMK parameters calculated by default algorithm were not optimal for
low-tier devices. Values mentioned here were well tested and
evaluated w.r.t memory and performance for such setups.

Change-Id: I40ed92d204aae6e758028ea1e9bd4ec7226dbe2b

lowmemorykiller: fine-tune LMK parameters for low-tier devices

LMK parameters for low-tier devices are fine-tuned for better
concurrency. Values mentioned here were well tested and
evaluated w.r.t memory and performance for such setups.

Change-Id: I0d547f1ec84863bbaedb68d9aba1ff7aef057e42
parent 3a6ced7c

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

+15 −3
Original line number Diff line number Diff line
@@ -162,6 +162,11 @@ final class ProcessList { 
    };

    // The actual OOM killer memory levels we are using.

    private final long[] mOomMinFree = new long[mOomAdj.length];

    // Optimal OOM killer memory levels for Low-Tier devices.

    private final long[] mOomMinFreeLowRam = new long[] {

            8192, 13652, 21844,

            27308, 32768, 38228

    };



    private final long mTotalMemMb;
@@ -216,11 +221,18 @@ final class ProcessList { 
            Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs);

        }



        // Overwrite calculated LMK parameters with the low-tier tested/validated values

        boolean is_lowram = SystemProperties.getBoolean("ro.config.low_ram",false);

        for (int i=0; i<mOomAdj.length; i++) {

            if (is_lowram) {

                mOomMinFree[i] = mOomMinFreeLowRam[i];

            }

            else {

                long low = mOomMinFreeLow[i];

                long high = mOomMinFreeHigh[i];

                mOomMinFree[i] = (long)(low + ((high-low)*scale));

            }

        }



        if (minfree_abs >= 0) {

            for (int i=0; i<mOomAdj.length; i++) {