Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

runtime: use vDSO clock_gettime on linux/riscv64

Browse source 
Speed up nanotime1 and walltime on riscv64 with vDSO, just like the
other vDSO-enabled targets.

name          old time/op  new time/op  delta
Now           1.53µs ± 1%  1.05µs ± 3%  -31.74%  (p=0.000 n=10+10)
NowUnixNano   1.54µs ± 0%  1.05µs ± 2%  -31.91%  (p=0.000 n=9+10)
NowUnixMilli  1.56µs ± 1%  1.06µs ± 1%  -31.73%  (p=0.000 n=10+10)
NowUnixMicro  1.56µs ± 1%  1.05µs ± 1%  -32.80%  (p=0.000 n=9+10)

Change-Id: I69b3fe3cc57685a826c53b366c0992e8048399bb
Reviewed-on: https://go-review.googlesource.com/c/go/+/328509
Trust: Meng Zhuo <mzh@golangcn.org>
Run-TryBot: Meng Zhuo <mzh@golangcn.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Meng Zhuo 2021-08-26 09:32:38 +08:00
parent df4c625d88
commit 1bd35fab05
7 changed files with 159 additions and 15 deletions
Download patch file Download diff file Expand all files Collapse all files

2
src/runtime/signal_unix.go
View file

@ -383,7 +383,7 @@ func preemptM(mp *m) {
//go:nosplit
func sigFetchG(c *sigctxt) *g {
switch GOARCH {
case "arm", "arm64", "ppc64", "ppc64le":
case "arm", "arm64", "ppc64", "ppc64le", "riscv64":
if !iscgo && inVDSOPage(c.sigpc()) {
// When using cgo, we save the g on TLS and load it from there
// in sigtramp. Just use that.