From: Martin Möhrmann <moehrmann@google.com>
Date: Thu, 11 May 2017 05:36:09 +0000 (+0200)
Subject: runtime, internal/cpu: change cache line size for arm64 to 64 bytes
X-Git-Tag: go1.10beta1~1704
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=e0e7c03d14d3235864400ad29aa02dfa540d2089;p=gostls13.git

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

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
index 078a6c3b80..d3c6cc8305 100644
--- 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
index 2d57ddae19..df8fb1e5fb 100644
--- 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