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runtime: add Benchmark[Clear|Copy]Fat[8|12]

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These correspond to 2 and 3 word fat copies/clears on 8g, which dominate usage in the stdlib. (70% of copies and 46% of clears are for 2 or 3 words.) I missed these in CL 111350043, which added 2 and 3 word benchmarks for 6g. A follow-up CL will optimize these cases.

LGTM=khr
R=khr
CC=golang-codereviews
https://golang.org/cl/115160043
This commit is contained in:
Josh Bleecher Snyder 2014-07-21 11:23:29 -07:00
parent ebfc7e862e
commit 2ac289c4a0
1 changed files with 26 additions and 0 deletions
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26
src/pkg/runtime/memmove_test.go
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@ -162,6 +162,18 @@ func BenchmarkMemclr256(b *testing.B) { bmMemclr(b, 256) }
func BenchmarkMemclr4096(b *testing.B) { bmMemclr(b, 4096) }
func BenchmarkMemclr65536(b *testing.B) { bmMemclr(b, 65536) }
func BenchmarkClearFat8(b *testing.B) {
for i := 0; i < b.N; i++ {
var x [8 / 4]uint32
_ = x
}
}
func BenchmarkClearFat12(b *testing.B) {
for i := 0; i < b.N; i++ {
var x [12 / 4]uint32
_ = x
}
}
func BenchmarkClearFat16(b *testing.B) {
for i := 0; i < b.N; i++ {
var x [16 / 4]uint32
@ -211,6 +223,20 @@ func BenchmarkClearFat1024(b *testing.B) {
}
}
func BenchmarkCopyFat8(b *testing.B) {
var x [8 / 4]uint32
for i := 0; i < b.N; i++ {
y := x
_ = y
}
}
func BenchmarkCopyFat12(b *testing.B) {
var x [12 / 4]uint32
for i := 0; i < b.N; i++ {
y := x
_ = y
}
}
func BenchmarkCopyFat16(b *testing.B) {
var x [16 / 4]uint32
for i := 0; i < b.N; i++ {