Maybe fix issue #17449495: Nakasi is pretty laggy/slow to do anything

Tweak the oom tuning to raise everything by 50%.  This is the same
increase we did for Volantis; I am thinking that most of the issue
there was not it being 64 bit, but it being tighter on RAM.  From
my testing, it looks like in user switching there was some paging
going on with Nakasi, and with this change things seem to be better.

We should probably revisit this for future work on RAM.  It seems
likely that a 64 bit device will need more RAM, so probably the value
I am picking here is larger than we actually need for other devices.
I think this is the safest change at this point though -- it leaves
Volantis the same, where we already had tweaked it to address paging
issues, raises it on Nakasi (to the same value as Volantis) where we
seem to have paging issues, and on our other devices also raises it
but those are generally not under memory pressure so this shouldn't
really make a difference.

Change-Id: Ib19394068734d322a015ed07370d9d4961877e4b

Author: Dianne Hackborn

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

@@ -166,14 +166,14 @@ final class ProcessList {
     // These are the low-end OOM level limits.  This is appropriate for an
     // HVGA or smaller phone with less than 512MB.  Values are in KB.
     private final int[] mOomMinFreeLow = new int[] {
-            8192, 12288, 16384,
-            24576, 28672, 32768
+            12288, 18432, 24576,
+            36864, 43008, 49152
     };
     // These are the high-end OOM level limits.  This is appropriate for a
     // 1280x800 or larger screen with around 1GB RAM.  Values are in KB.
     private final int[] mOomMinFreeHigh = new int[] {
-            49152, 61440, 73728,
-            86016, 98304, 122880
+            73728, 92160, 110592,
+            129024, 147456, 184320
     };
     // The actual OOM killer memory levels we are using.
     private final int[] mOomMinFree = new int[mOomAdj.length];
@@ -231,7 +231,11 @@ private void updateOomLevels(int displayWidth, int displayHeight, boolean write)
             Slog.i("XXXXXX", "minfree_adj=" + minfree_adj + " minfree_abs=" + minfree_abs);
         }
 
-        final boolean is64bit = Build.SUPPORTED_64_BIT_ABIS.length > 0;
+        // We've now baked in the increase to the basic oom values above, since
+        // they seem to be useful more generally for devices that are tight on
+        // memory than just for 64 bit.  This should probably have some more
+        // tuning done, so not deleting it quite yet...
+        final boolean is64bit = false; //Build.SUPPORTED_64_BIT_ABIS.length > 0;
 
         for (int i=0; i<mOomAdj.length; i++) {
             int low = mOomMinFreeLow[i];