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0435e88a11
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>
26 lines
652 B
Go
26 lines
652 B
Go
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Export guts for testing.
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package runtime
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import "unsafe"
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var (
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TestingWER = &testingWER
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OsYield = osyield
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TimeBeginPeriodRetValue = &timeBeginPeriodRetValue
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)
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func NumberOfProcessors() int32 {
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var info systeminfo
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stdcall1(_GetSystemInfo, uintptr(unsafe.Pointer(&info)))
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return int32(info.dwnumberofprocessors)
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}
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func LoadLibraryExStatus() (useEx, haveEx, haveFlags bool) {
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return useLoadLibraryEx, _LoadLibraryExW != nil, _AddDllDirectory != nil
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}
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