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| author | Jay Weisskopf <jay@jayschwa.net> | 2014-02-24 10:57:46 -0500 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2014-02-24 10:57:46 -0500 |
| commit | 86c976ffd094c0326c9ba2e3d47d9cc6d73084cf (patch) | |
| tree | 9ba9e40ed56c7c732a365173bf42014bd20d8a13 /src/pkg/runtime/sys_linux_386.s | |
| parent | 7403071ada618d2db82b7897cce19cd1627c8831 (diff) | |
| download | go-86c976ffd094c0326c9ba2e3d47d9cc6d73084cf.tar.xz | |
runtime: use monotonic clock for timers (linux/386, linux/amd64)
This lays the groundwork for making Go robust when the system's
calendar time jumps around. All input values to the runtimeTimer
struct now use the runtime clock as a common reference point.
This affects net.Conn.Set[Read|Write]Deadline(), time.Sleep(),
time.Timer, etc. Under normal conditions, behavior is unchanged.
Each platform and architecture's implementation of runtime·nanotime()
should be modified to use a monotonic system clock when possible.
Platforms/architectures modified and tested with monotonic clock:
linux/x86 - clock_gettime(CLOCK_MONOTONIC)
Update #6007
LGTM=dvyukov, rsc
R=golang-codereviews, dvyukov, alex.brainman, stephen.gutekanst, dave, rsc, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/53010043
Diffstat (limited to 'src/pkg/runtime/sys_linux_386.s')
| -rw-r--r-- | src/pkg/runtime/sys_linux_386.s | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/pkg/runtime/sys_linux_386.s b/src/pkg/runtime/sys_linux_386.s index fcda739db4..cdd729957c 100644 --- a/src/pkg/runtime/sys_linux_386.s +++ b/src/pkg/runtime/sys_linux_386.s @@ -106,7 +106,7 @@ TEXT runtime·mincore(SB),NOSPLIT,$0-24 // func now() (sec int64, nsec int32) TEXT time·now(SB), NOSPLIT, $32 MOVL $265, AX // syscall - clock_gettime - MOVL $0, BX + MOVL $0, BX // CLOCK_REALTIME LEAL 8(SP), CX MOVL $0, DX CALL *runtime·_vdso(SB) @@ -123,7 +123,7 @@ TEXT time·now(SB), NOSPLIT, $32 // void nanotime(int64 *nsec) TEXT runtime·nanotime(SB), NOSPLIT, $32 MOVL $265, AX // syscall - clock_gettime - MOVL $0, BX + MOVL $1, BX // CLOCK_MONOTONIC LEAL 8(SP), CX MOVL $0, DX CALL *runtime·_vdso(SB) |