| commit | 8f2aa9fb488f140f155cdc02b438533a5c75eeed | [log] [tgz] |
|---|---|---|
| author | Vaughn Iverson <vsivsi@yahoo.com> | Mon Oct 14 15:29:07 2024 -0700 |
| committer | Keith Randall <khr@golang.org> | Mon Nov 04 23:17:32 2024 +0000 |
| tree | 8537c3a21a05739a69d4cf78b61be8636b119d66 | |
| parent | 054f1fcdf746e45edc4baf1840e5c5750b7a864a [diff] |
cpu: conditionally re-enable AVX512 support on darwin/amd64 Darwin opmask clobbering bug was fixed in kernel version 21.3.0 as released in MacOS 12.2.0. This commit resolves issue by checking for Darwin AVX512 support via a sysctl call with the addition of a kernel minimum version check. The kernel version check is completed without adding new dependencies to x/sys/cpu. A sysctl call is accomplished by copying a minimal amount of code from x/sys/unix, to retrieve only the needed KERN_OSRELEASE value. This code is structured in the same manner as an existing analogous AIX/PPC64 syscall. The resulting dotted version string value is then parsed for numeric comparison with a dependency free function. All code in this contribution is structured to ease removal of the special darwin/amd64 codepaths when that OS/arch combination is eventually no longer supported by golang. Resolves issue: golang/go#49233, reinstates fix for issue: golang/go#43089 Change-Id: I4755fc8b3865eb6562b0959ecc910e2c46ac6cb4 Reviewed-on: https://go-review.googlesource.com/c/sys/+/620256 Reviewed-by: Keith Randall <khr@google.com> Reviewed-by: Keith Randall <khr@golang.org> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> Reviewed-by: Carlos Amedee <carlos@golang.org> Reviewed-by: vsivsi@yahoo.com <vsivsi@yahoo.com>
This repository holds supplemental Go packages for low-level interactions with the operating system.
This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://go.dev/doc/contribute.
The git repository is https://go.googlesource.com/sys.
The main issue tracker for the sys repository is located at https://go.dev/issues. Prefix your issue with “x/sys:” in the subject line, so it is easy to find.