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| author | Dmitriy Vyukov <dvyukov@google.com> | 2013-08-13 22:14:04 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2013-08-13 22:14:04 +0400 |
| commit | f9066fe1c0a7181242f77d8534e0b6e112c982a9 (patch) | |
| tree | 1c0a0664c07dd4d6d893319f2e62b9685720b502 /src/pkg/runtime/runtime.h | |
| parent | cc4e6aad8ec18b4ee7fe0392f30f229ddb979589 (diff) | |
| download | go-f9066fe1c0a7181242f77d8534e0b6e112c982a9.tar.xz | |
runtime: more reliable preemption
Currently it's possible that a goroutine
that periodically executes non-blocking
cgo/syscalls is never preempted.
This change splits scheduler and syscall
ticks to prevent such situation.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/12658045
Diffstat (limited to 'src/pkg/runtime/runtime.h')
| -rw-r--r-- | src/pkg/runtime/runtime.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/pkg/runtime/runtime.h b/src/pkg/runtime/runtime.h index a81408f40f..89a42bbca4 100644 --- a/src/pkg/runtime/runtime.h +++ b/src/pkg/runtime/runtime.h @@ -361,9 +361,10 @@ struct P { Lock; - uint32 status; // one of Pidle/Prunning/... + uint32 status; // one of Pidle/Prunning/... P* link; - uint32 tick; // incremented on every scheduler or system call + uint32 schedtick; // incremented on every scheduler call + uint32 syscalltick; // incremented on every system call M* m; // back-link to associated M (nil if idle) MCache* mcache; |