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The GODEBUG environment variable can be used to disable usage of specific processor features of Go programs that use the sys/cpu package. This is useful for testing and benchmarking different code paths that are guarded by sys/cpu variable checks. Use of processor features can not be enabled through GODEBUG. To disable usage of AVX and SSE41 cpu features on GOARCH amd64 use: GODEBUG=cpu.avx=off,cpu.sse41=off The special "all" option can be used to disable all options: GODEBUG=all=off This aligns the support of GODEBUG for sys/cpu with existing support for GODEBUG in the Go standard library package internal/cpu. Fixes golang/go#33963 Change-Id: I618b71af397bf06c57a49b2a300d032a16d05664 Reviewed-on: https://go-review.googlesource.com/c/sys/+/245237 Run-TryBot: Martin Möhrmann <moehrmann@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Martin Möhrmann <moehrmann@google.com> Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
16 lines
312 B
Go
16 lines
312 B
Go
// Copyright 2018 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 !386,!amd64,!amd64p32,!arm64
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package cpu
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func archInit() {
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if err := readHWCAP(); err != nil {
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return
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}
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doinit()
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Initialized = true
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}
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