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| author | Hans <hzb153@gmail.com> | 2021-08-02 05:43:29 +0000 |
|---|---|---|
| committer | Austin Clements <austin@google.com> | 2021-09-02 13:53:25 +0000 |
| commit | 4591f49938aedbbac7a24225047984479abe72b8 (patch) | |
| tree | abf1430b9e594884ce30346afec34b858aa00653 /test/codegen | |
| parent | a35c5c98c0487f93d70b468483f2ca8e0d698bb7 (diff) | |
| download | go-4591f49938aedbbac7a24225047984479abe72b8.tar.xz | |
runtime: do not alloc never used tail bytes in fixalloc
Currently, the '_FixAllocChunk % fixalloc.size' tail bytes
will never be used when allocing from persistentalloc.
Wasted bytes on darwin/amd64:
_FixAllocChunk % mheap_.spanalloc.size = 64
_FixAllocChunk % mheap_.cachealloc.size = 784
_FixAllocChunk % mheap_.specialfinalizeralloc.size = 16
_FixAllocChunk % mheap_.specialprofilealloc.size = 16
_FixAllocChunk % mheap_.specialReachableAlloc.size = 16
_FixAllocChunk % mheap_.arenaHintAlloc.size = 16
After this commit, fixalloc alloc '_FixAllocChunk / fixalloc.size'
objects exactly with zero waste. Sizeof(fixalloc{}) is unchanged.
Change-Id: Ifc551f5b7aa9d842fa559abbe532ffcfb4d3540c
GitHub-Last-Rev: e08b4c66b82bc7be9d14fb7eb7580504d777481e
GitHub-Pull-Request: golang/go#47439
Reviewed-on: https://go-review.googlesource.com/c/go/+/338090
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
Diffstat (limited to 'test/codegen')
0 files changed, 0 insertions, 0 deletions