diff options
Diffstat (limited to 'vendor/golang.org/x/sys/cpu/cpu_arm64.go')
| -rw-r--r-- | vendor/golang.org/x/sys/cpu/cpu_arm64.go | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/vendor/golang.org/x/sys/cpu/cpu_arm64.go b/vendor/golang.org/x/sys/cpu/cpu_arm64.go index 87dd5e3..f3eb993 100644 --- a/vendor/golang.org/x/sys/cpu/cpu_arm64.go +++ b/vendor/golang.org/x/sys/cpu/cpu_arm64.go @@ -6,7 +6,10 @@ package cpu import "runtime" -const cacheLineSize = 64 +// cacheLineSize is used to prevent false sharing of cache lines. +// We choose 128 because Apple Silicon, a.k.a. M1, has 128-byte cache line size. +// It doesn't cost much and is much more future-proof. +const cacheLineSize = 128 func initOptions() { options = []option{ @@ -41,13 +44,10 @@ func archInit() { switch runtime.GOOS { case "freebsd": readARM64Registers() - case "linux", "netbsd": + case "linux", "netbsd", "openbsd": doinit() default: - // Most platforms don't seem to allow reading these registers. - // - // OpenBSD: - // See https://golang.org/issue/31746 + // Many platforms don't seem to allow reading these registers. setMinimalFeatures() } } |