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runtime: revert "do not call timeBeginPeriod on windows"

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This reverts commit ab4c9298b8.

Sysmon critically depends on system timer resolution for retaking
of Ps blocked in system calls. See #14790 for an example
of a program where execution time goes from 2ms to 30ms if
timeBeginPeriod(1) is not used.

We can remove timeBeginPeriod(1) when we support UMS (#7876).

Update #14790

Change-Id: I362b56154359b2c52d47f9f2468fe012b481cf6d
Reviewed-on: https://go-review.googlesource.com/20834
Reviewed-by: Austin Clements <austin@google.com>
Run-TryBot: Dmitry Vyukov <dvyukov@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
This commit is contained in:
Dmitry Vyukov 2016-03-18 10:56:23 +01:00
parent 9d4efdfd12
commit 0435e88a11
4 changed files with 25 additions and 59 deletions
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2
misc/cgo/testcarchive/carchive_test.go
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@ -120,7 +120,7 @@ func goEnv(key string) string {
func compilemain(t *testing.T, libgo string) {
ccArgs := append(cc, "-o", "testp"+exeSuffix, "main.c")
if GOOS == "windows" {
ccArgs = append(ccArgs, "main_windows.c", libgo, "-lntdll", "-lws2_32")
ccArgs = append(ccArgs, "main_windows.c", libgo, "-lntdll", "-lws2_32", "-lwinmm")
} else {
ccArgs = append(ccArgs, "main_unix.c", libgo)
}