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| author | Dmitriy Vyukov <dvyukov@google.com> | 2014-01-24 22:35:11 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2014-01-24 22:35:11 +0400 |
| commit | 1fa702942582645efc71a44a4899f51af759694e (patch) | |
| tree | 3be5ebc89dce4b5aed4018afc72e1e662a8e838c /src/pkg/runtime/malloc.h | |
| parent | f8e0057bb71cded5bb2d0b09c6292b13c59b5748 (diff) | |
| download | go-1fa702942582645efc71a44a4899f51af759694e.tar.xz | |
runtime: combine small NoScan allocations
Combine NoScan allocations < 16 bytes into a single memory block.
Reduces number of allocations on json/garbage benchmarks by 10+%.
json-1
allocated 8039872 7949194 -1.13%
allocs 105774 93776 -11.34%
cputime 156200000 100700000 -35.53%
gc-pause-one 4908873 3814853 -22.29%
gc-pause-total 2748969 2899288 +5.47%
rss 52674560 43560960 -17.30%
sys-gc 3796976 3256304 -14.24%
sys-heap 43843584 35192832 -19.73%
sys-other 5589312 5310784 -4.98%
sys-stack 393216 393216 +0.00%
sys-total 53623088 44153136 -17.66%
time 156193436 100886714 -35.41%
virtual-mem 256548864 256540672 -0.00%
garbage-1
allocated 2996885 2932982 -2.13%
allocs 62904 55200 -12.25%
cputime 17470000 17400000 -0.40%
gc-pause-one 932757485 925806143 -0.75%
gc-pause-total 4663787 4629030 -0.75%
rss 1151074304 1133670400 -1.51%
sys-gc 66068352 65085312 -1.49%
sys-heap 1039728640 1024065536 -1.51%
sys-other 38038208 37485248 -1.45%
sys-stack 8650752 8781824 +1.52%
sys-total 1152485952 1135417920 -1.48%
time 17478088 17418005 -0.34%
virtual-mem 1343709184 1324204032 -1.45%
LGTM=iant, bradfitz
R=golang-codereviews, dave, iant, rsc, bradfitz
CC=golang-codereviews, khr
https://golang.org/cl/38750047
Diffstat (limited to 'src/pkg/runtime/malloc.h')
| -rw-r--r-- | src/pkg/runtime/malloc.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/pkg/runtime/malloc.h b/src/pkg/runtime/malloc.h index 9f34b55461..8122b4b0b8 100644 --- a/src/pkg/runtime/malloc.h +++ b/src/pkg/runtime/malloc.h @@ -108,6 +108,10 @@ enum // Tunable constants. MaxSmallSize = 32<<10, + // Tiny allocator parameters, see "Tiny allocator" comment in malloc.goc. + TinySize = 16, + TinySizeClass = 2, + FixAllocChunk = 16<<10, // Chunk size for FixAlloc MaxMHeapList = 1<<(20 - PageShift), // Maximum page length for fixed-size list in MHeap. HeapAllocChunk = 1<<20, // Chunk size for heap growth |