4166ff42c0
A goroutine should be preempted if it runs for 10ms without blocking.
We found that this doesn't work for goroutines which call short system calls.
For example, the next program can stuck for seconds without this fix:
$ cat main.go
package main
import (
"runtime"
"syscall"
)
func main() {
runtime.GOMAXPROCS(1)
c := make(chan int)
go func() {
c <- 1
for {
t := syscall.Timespec{
Nsec: 300,
}
if true {
syscall.Nanosleep(&t, nil)
}
}
}()
<-c
}
$ time go run main.go
real 0m8.796s
user 0m0.367s
sys 0m0.893s
Updates #10958
Change-Id: Id3be54d3779cc28bfc8b33fe578f13778f1ae2a2
Reviewed-on: https://go-review.googlesource.com/c/go/+/170138
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
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| doc | ||
| lib/time | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| AUTHORS | ||
| CONTRIBUTING.md | ||
| CONTRIBUTORS | ||
| favicon.ico | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| robots.txt | ||
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