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ea59ebd338
Use the __vdso_clock_gettime fast path via the vDSO on linux/arm64 to speed up nanotime and walltime. This results in the following performance improvement for time.Now on Cavium ThunderX: name old time/op new time/op delta TimeNow 442ns ± 0% 163ns ± 0% -63.16% (p=0.000 n=10+10) And benchmarks on VDSO BenchmarkClockVDSOAndFallbackPaths/vDSO 10000000 166 ns/op BenchmarkClockVDSOAndFallbackPaths/Fallback 3000000 456 ns/op Change-Id: I326118c6dff865eaa0569fc45d1fc1ff95cb74f6 Reviewed-on: https://go-review.googlesource.com/99855 Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com> Run-TryBot: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
12 lines
264 B
Go
12 lines
264 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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// +build linux
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// +build !386,!amd64,!arm,!arm64
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package runtime
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func vdsoauxv(tag, val uintptr) {
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}
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