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Commit 950cfa54 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

[mikeioannina]: Adjust for 5.0

Change-Id: I258b1058d0feadbd153c0068d149db8d8b71c93f
parent 12a0e0d1

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

+9 −1
Original line number Diff line number Diff line
@@ -192,6 +192,11 @@ final class ProcessList { 
    };

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

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

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

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

            12288, 20478, 32766,

            40962, 49152, 57342

    };



    private final long mTotalMemMb;
@@ -269,11 +274,14 @@ final class ProcessList { 
                // More scaling up not required yet

                // mOomMinFree[i] = (3*mOomMinFree[i])/2;



            } else if (ActivityManager.isLowRamDeviceStatic()) {

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

                Slog.i("XXXXXX", "choosing minFree values for lowram");

                mOomMinFree[i] = mOomMinFreeLowRam[i];

            } else {

                Slog.i("XXXXXX", "choosing minFree values for 32 Bit");

                low = mOomMinFreeLow32Bit[i];

                high = mOomMinFreeHigh32Bit[i];



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

            }

        }