runtime, internal/cpu: change cache line size for arm64 to 64 bytes

martisch · martisch · commit e0e7c03d14d3 · 2017-08-08T06:49:49.000Z
According to http://infocenter.arm.com: * ARM Cortex-A53 (Raspberry Pi 3, Pine A64) * ARM Cortex-A57 (Opteron A1100, Tegra X1) * ARM Cortex-A72 all have a cache line size of 64 bytes. Change-Id: I4b333e930792fb1a221b3ca6f395bfa1b7762afa Reviewed-on: https://go-review.googlesource.com/43250 Run-TryBot: Martin Möhrmann <moehrmann@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/internal/cpu/cpu_arm64.go b/src/internal/cpu/cpu_arm64.go
@@ -4,4 +4,4 @@
 
 package cpu
 
-const CacheLineSize = 32
+const CacheLineSize = 64
diff --git a/src/runtime/internal/sys/arch_arm64.go b/src/runtime/internal/sys/arch_arm64.go
@@ -7,7 +7,7 @@ package sys
 const (
 	ArchFamily          = ARM64
 	BigEndian           = 0
-	CacheLineSize       = 32
+	CacheLineSize       = 64
 	DefaultPhysPageSize = 65536
 	PCQuantum           = 4
 	Int64Align          = 8

Original file line number	Diff line number	Diff line change
`@@ -4,4 +4,4 @@`
`4`	`4`
`5`	`5`	`package cpu`
`6`	`6`
`7`		`-const CacheLineSize = 32`
	`7`	`+const CacheLineSize = 64`