[go] cmd/compile: use OpMove instead of memmove more on loong64
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Gopher Robot (Gerrit)
Feb 27, 2026, 11:18:55 PM (18 hours ago) Feb 27
to abner chenc, goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, David Chase, Meidan Li, sophie zhao, Keith Randall, Keith Randall, Go LUCI, Martin Möhrmann, golang-co...@googlegroups.com
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Change information
Commit message:
cmd/compile: use OpMove instead of memmove more on loong64
OpMove is faster for small moves of fixed size.
goos: linux
goarch: loong64
pkg: runtime
cpu: Loongson-3A6000 @ 2500.00MHz
| old.txt | new.txt |
| sec/op | sec/op vs base |
Memmove/0 2.225n ± 2% 2.424n ± 1% +8.94% (p=0.000 n=8)
Memmove/1 2.813n ± 0% 2.562n ± 1% -8.94% (p=0.000 n=8)
Memmove/2 2.538n ± 3% 2.572n ± 1% +1.32% (p=0.001 n=8)
Memmove/3 2.807n ± 0% 2.804n ± 0% -0.11% (p=0.024 n=8)
Memmove/4 2.531n ± 2% 2.803n ± 0% +10.72% (p=0.000 n=8)
Memmove/5 3.203n ± 0% 2.809n ± 0% -12.29% (p=0.000 n=8)
Memmove/6 3.203n ± 0% 2.811n ± 0% -12.24% (p=0.000 n=8)
Memmove/7 3.203n ± 0% 2.809n ± 0% -12.30% (p=0.000 n=8)
Memmove/8 2.804n ± 0% 2.803n ± 0% ~ (p=0.321 n=8)
Memmove/9 3.203n ± 0% 3.203n ± 0% ~ (p=1.000 n=8)
Memmove/10 3.203n ± 0% 3.203n ± 0% ~ (p=1.000 n=8)
Memmove/11 3.203n ± 0% 3.203n ± 0% ~ (p=1.000 n=8)
Memmove/12 3.202n ± 0% 3.202n ± 0% ~ (p=0.282 n=8)
Memmove/13 3.202n ± 0% 3.202n ± 0% ~ (p=1.000 n=8)
Memmove/14 3.203n ± 0% 3.203n ± 0% ~ (p=0.318 n=8)
Memmove/15 3.203n ± 0% 3.203n ± 0% ~ (p=1.000 n=8)
Memmove/16 3.203n ± 0% 3.203n ± 0% ~ (p=1.000 n=8)
Memmove/32 3.603n ± 0% 3.603n ± 0% ~ (p=1.000 n=8)
Memmove/64 4.204n ± 0% 4.204n ± 0% ~ (p=1.000 n=8)
MemmoveOverlap/32 4.004n ± 0% 4.004n ± 0% ~ (p=0.993 n=8)
MemmoveOverlap/64 4.804n ± 0% 4.604n ± 0% -4.16% (p=0.000 n=8)
MemmoveOverlap/128 8.007n ± 0% 7.607n ± 0% -5.00% (p=0.000 n=8)
MemmoveUnalignedDst/0 2.805n ± 0% 2.426n ± 0% -13.53% (p=0.000 n=8)
MemmoveUnalignedDst/1 3.603n ± 0% 2.554n ± 1% -29.13% (p=0.000 n=8)
MemmoveUnalignedDst/2 3.203n ± 0% 3.145n ± 0% -1.83% (p=0.000 n=8)
MemmoveUnalignedDst/3 3.603n ± 0% 2.807n ± 0% -22.10% (p=0.000 n=8)
MemmoveUnalignedDst/4 3.203n ± 0% 2.865n ± 0% -10.57% (p=0.000 n=8)
MemmoveUnalignedDst/5 4.004n ± 0% 2.845n ± 0% -28.96% (p=0.000 n=8)
MemmoveUnalignedDst/6 4.004n ± 0% 2.841n ± 0% -29.06% (p=0.000 n=8)
MemmoveUnalignedDst/7 4.003n ± 0% 2.840n ± 0% -29.06% (p=0.000 n=8)
MemmoveUnalignedDst/8 3.603n ± 0% 3.203n ± 0% -11.10% (p=0.000 n=8)
MemmoveUnalignedDst/9 4.004n ± 0% 3.204n ± 0% -19.98% (p=0.000 n=8)
MemmoveUnalignedDst/10 4.003n ± 0% 3.204n ± 0% -19.97% (p=0.000 n=8)
MemmoveUnalignedDst/11 4.004n ± 0% 3.204n ± 0% -19.98% (p=0.000 n=8)
MemmoveUnalignedDst/12 4.004n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedDst/13 4.003n ± 0% 3.202n ± 0% -20.01% (p=0.000 n=8)
MemmoveUnalignedDst/14 4.003n ± 0% 3.204n ± 0% -19.97% (p=0.000 n=8)
MemmoveUnalignedDst/15 4.003n ± 0% 3.204n ± 0% -19.97% (p=0.000 n=8)
MemmoveUnalignedDst/16 4.003n ± 0% 3.204n ± 0% -19.97% (p=0.000 n=8)
MemmoveUnalignedDst/32 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedDst/64 7.607n ± 0% 7.607n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedDstOverlap/32 4.805n ± 2% 4.636n ± 1% -3.51% (p=0.000 n=8)
MemmoveUnalignedDstOverlap/64 8.007n ± 0% 8.007n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedDstOverlap/128 9.066n ± 0% 9.033n ± 1% -0.37% (p=0.014 n=8)
MemmoveUnalignedSrc/0 2.803n ± 0% 2.418n ± 1% -13.74% (p=0.000 n=8)
MemmoveUnalignedSrc/1 3.603n ± 0% 2.543n ± 0% -29.42% (p=0.000 n=8)
MemmoveUnalignedSrc/2 3.203n ± 0% 2.478n ± 1% -22.65% (p=0.000 n=8)
MemmoveUnalignedSrc/3 3.603n ± 0% 2.803n ± 0% -22.20% (p=0.000 n=8)
MemmoveUnalignedSrc/4 3.203n ± 0% 2.804n ± 0% -12.47% (p=0.000 n=8)
MemmoveUnalignedSrc/5 4.003n ± 0% 2.817n ± 0% -29.62% (p=0.000 n=8)
MemmoveUnalignedSrc/6 4.004n ± 0% 2.817n ± 0% -29.66% (p=0.000 n=8)
MemmoveUnalignedSrc/7 4.003n ± 0% 2.818n ± 0% -29.60% (p=0.000 n=8)
MemmoveUnalignedSrc/8 3.603n ± 0% 3.202n ± 0% -11.13% (p=0.000 n=8)
MemmoveUnalignedSrc/9 4.003n ± 0% 3.202n ± 0% -20.01% (p=0.000 n=8)
MemmoveUnalignedSrc/10 4.004n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedSrc/11 4.003n ± 0% 3.203n ± 0% -19.99% (p=0.000 n=8)
MemmoveUnalignedSrc/12 4.003n ± 0% 3.203n ± 0% -19.99% (p=0.000 n=8)
MemmoveUnalignedSrc/13 4.003n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedSrc/14 4.004n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedSrc/15 4.003n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedSrc/16 4.004n ± 0% 3.203n ± 0% -20.00% (p=0.000 n=8)
MemmoveUnalignedSrc/32 4.003n ± 0% 4.004n ± 0% ~ (p=0.432 n=8)
MemmoveUnalignedSrc/64 4.804n ± 0% 4.417n ± 0% -8.06% (p=0.000 n=8)
MemmoveUnalignedSrcDst/f_16_0 4.004n ± 0% 4.004n ± 0% ~ (p=0.533 n=8)
MemmoveUnalignedSrcDst/b_16_0 4.004n ± 0% 4.004n ± 0% ~ (p=0.546 n=8)
MemmoveUnalignedSrcDst/f_16_1 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcDst/b_16_1 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcDst/f_16_4 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcDst/b_16_4 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcDst/f_16_7 4.004n ± 0% 4.004n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcDst/b_16_7 4.003n ± 0% 4.004n ± 0% ~ (p=0.641 n=8)
MemmoveUnalignedSrcDst/f_64_0 5.245n ± 1% 5.269n ± 0% ~ (p=0.053 n=8)
MemmoveUnalignedSrcDst/b_64_0 5.401n ± 0% 5.402n ± 0% ~ (p=0.194 n=8)
MemmoveUnalignedSrcDst/f_64_1 7.210n ± 1% 7.174n ± 0% -0.49% (p=0.007 n=8)
MemmoveUnalignedSrcDst/b_64_1 6.710n ± 0% 6.709n ± 0% ~ (p=0.542 n=8)
MemmoveUnalignedSrcDst/f_64_4 7.208n ± 0% 7.182n ± 0% -0.36% (p=0.036 n=8)
MemmoveUnalignedSrcDst/b_64_4 6.717n ± 0% 6.708n ± 0% -0.13% (p=0.001 n=8)
MemmoveUnalignedSrcDst/f_64_7 7.246n ± 0% 7.192n ± 0% -0.75% (p=0.000 n=8)
MemmoveUnalignedSrcDst/b_64_7 6.718n ± 0% 6.708n ± 0% -0.15% (p=0.001 n=8)
MemmoveUnalignedSrcOverlap/32 6.806n ± 0% 6.806n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcOverlap/64 10.01n ± 0% 10.01n ± 0% ~ (p=1.000 n=8)
MemmoveUnalignedSrcOverlap/128 11.61n ± 0% 11.61n ± 0% ~ (p=1.000 n=8)
MemmoveKnownSize112 4.070n ± 0% 4.070n ± 0% ~ (p=0.733 n=8)
MemmoveKnownSize128 3.429n ± 0% 3.411n ± 0% -0.52% (p=0.000 n=8)
MemmoveKnownSize192 6.686n ± 3% 5.285n ± 10% -20.96% (p=0.003 n=8)
MemmoveKnownSize248 8.385n ± 4% 6.986n ± 0% -16.69% (p=0.000 n=8)
MemmoveKnownSize256 9.354n ± 8% 7.895n ± 14% -15.60% (p=0.000 n=8)
MemmoveKnownSize512 13.14n ± 1% 13.06n ± 0% ~ (p=0.623 n=8)
MemmoveKnownSize1024 25.82n ± 0% 25.82n ± 0% ~ (p=0.713 n=8)
geomean 4.355n 3.936n -9.63%
Change-Id: I72e3b513447948223ebba0a5a091ff552068574d
Reviewed-on: https://go-review.googlesource.com/c/go/+/749720
Reviewed-by: Keith Randall <k...@golang.org>
Reviewed-by: sophie zhao <zhaox...@loongson.cn>
Auto-Submit: Keith Randall <k...@golang.org>
Reviewed-by: Keith Randall <k...@google.com>
LUCI-TryBot-Result: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Meidan Li <lime...@loongson.cn>
Reviewed-by: David Chase <drc...@google.com>
Files:
- M src/cmd/compile/internal/ssa/rewrite.go
Change size: XS
Delta: 1 file changed, 3 insertions(+), 1 deletion(-)
Branch: refs/heads/master
Submit Requirements:
Code-Review: +1 by David Chase, +2 by Keith Randall, +1 by Keith Randall, +2 by Meidan Li, +2 by sophie zhao
TryBots-Pass: LUCI-TryBot-Result+1 by Go LUCI
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