diff options
| author | 2016-05-27 13:50:59 -0700 | |
|---|---|---|
| committer | 2016-05-27 17:31:32 -0700 | |
| commit | 9e03b2fbc9843b834bb9d18bc8c3d2ef44a838d8 (patch) | |
| tree | ecd18b6f279dcf791eb60b94d0ba7c01cd795387 | |
| parent | d355b75ca09d83c47e596daeb1a434942de83bee (diff) | |
Reduce TLAB size
Prevent pathological cases like threads fighting for TLABs and doing
back to back GC for alloc each allocation.
No performance change on angler, before:
EEAC: 1161, 1171, 1211
MemAllocTest: 1005, 971, 1148
After:
EEAC: 1173, 1175, 1163
MemAllocTest: 1003, 908, 803
There is also a mysterious speed up on volantis:
EEAC: 1563, 1553, 1543
MemAllocTest: 1474, 1486, 1485
After:
EEAC: 709, 714, 709
MemAllocTest: 664, 684, 655
Bug: 28976163
Change-Id: I564908badf395b6f948aa2dafcb66fe353fc1eba
| -rw-r--r-- | runtime/gc/heap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/runtime/gc/heap.h b/runtime/gc/heap.h index 2a1a4a17ae..6fb048a5d7 100644 --- a/runtime/gc/heap.h +++ b/runtime/gc/heap.h @@ -128,7 +128,7 @@ class Heap { static constexpr size_t kDefaultMinFree = kDefaultMaxFree / 4; static constexpr size_t kDefaultLongPauseLogThreshold = MsToNs(5); static constexpr size_t kDefaultLongGCLogThreshold = MsToNs(100); - static constexpr size_t kDefaultTLABSize = 256 * KB; + static constexpr size_t kDefaultTLABSize = 32 * KB; static constexpr double kDefaultTargetUtilization = 0.5; static constexpr double kDefaultHeapGrowthMultiplier = 2.0; // Primitive arrays larger than this size are put in the large object space. |