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| author | Dmitriy Vyukov <dvyukov@google.com> | 2011-07-21 13:57:13 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2011-07-21 13:57:13 -0400 |
| commit | 6b2ec065871019d07dcbe6ca527fbd4c600e1c19 (patch) | |
| tree | ec8664ae376c9fab705f6dfd359fd6af8100070a /src/cmd/ld | |
| parent | 17d9093bf214f3461815410c298006bac8427c0e (diff) | |
| download | go-6b2ec065871019d07dcbe6ca527fbd4c600e1c19.tar.xz | |
runtime: faster select
Make selectsend() accept pointer to the element,
it makes it possible to make Scase fixed-size
and allocate/free Select, all Scase's and all SudoG at once.
As a consequence SudoG freelist die out.
benchmark old,ns/op new,ns/op
BenchmarkSelectUncontended 1080 558
BenchmarkSelectUncontended-2 675 264
BenchmarkSelectUncontended-4 459 205
BenchmarkSelectContended 1086 560
BenchmarkSelectContended-2 1775 1672
BenchmarkSelectContended-4 2668 2149
(on Intel Q6600, 4 cores, 2.4GHz)
benchmark old ns/op new ns/op delta
BenchmarkSelectUncontended 517.00 326.00 -36.94%
BenchmarkSelectUncontended-2 281.00 166.00 -40.93%
BenchmarkSelectUncontended-4 250.00 83.10 -66.76%
BenchmarkSelectUncontended-8 107.00 47.40 -55.70%
BenchmarkSelectUncontended-16 67.80 41.30 -39.09%
BenchmarkSelectContended 513.00 325.00 -36.65%
BenchmarkSelectContended-2 699.00 628.00 -10.16%
BenchmarkSelectContended-4 1085.00 1092.00 +0.65%
BenchmarkSelectContended-8 3253.00 2477.00 -23.85%
BenchmarkSelectContended-16 5313.00 5116.00 -3.71%
(on Intel E5620, 8 HT cores, 2.4 GHz)
R=rsc, ken
CC=golang-dev
https://golang.org/cl/4811041
Diffstat (limited to 'src/cmd/ld')
| -rw-r--r-- | src/cmd/ld/dwarf.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/src/cmd/ld/dwarf.c b/src/cmd/ld/dwarf.c index d02fff3c26..d8ca27acea 100644 --- a/src/cmd/ld/dwarf.c +++ b/src/cmd/ld/dwarf.c @@ -1422,7 +1422,6 @@ synthesizechantypes(DWDie *die) copychildren(dwh, hchan); substitutetype(dwh, "recvq", dww); substitutetype(dwh, "sendq", dww); - substitutetype(dwh, "free", defptrto(dws)); newattr(dwh, DW_AT_byte_size, DW_CLS_CONSTANT, getattr(hchan, DW_AT_byte_size)->value, nil); |