3214129a83
The LoadAcquire barrier on Loong64 is "dbar 0x14", using the correct barrier in Load{8,32,64} implementation can improve performance. goos: linux goarch: loong64 pkg: internal/runtime/atomic cpu: Loongson-3A6000-HV @ 2500.00MHz | bench.old | bench.new | | sec/op | sec/op vs base | AtomicLoad64 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad64-2 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad64-4 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad 17.220n ± 0% 4.402n ± 0% -74.44% (p=0.000 n=20) AtomicLoad-2 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad-4 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad8 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad8-2 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) AtomicLoad8-4 17.210n ± 0% 4.402n ± 0% -74.42% (p=0.000 n=20) geomean 17.21n 4.402n -74.42% goos: linux goarch: loong64 pkg: internal/runtime/atomic cpu: Loongson-3A5000 @ 2500.00MHz | bench.old | bench.new | | sec/op | sec/op vs base | AtomicLoad64 18.82n ± 0% 10.41n ± 0% -44.69% (p=0.000 n=20) AtomicLoad64-2 18.81n ± 0% 10.41n ± 0% -44.66% (p=0.000 n=20) AtomicLoad64-4 18.82n ± 0% 10.41n ± 0% -44.69% (p=0.000 n=20) AtomicLoad 18.81n ± 0% 10.41n ± 0% -44.66% (p=0.000 n=20) AtomicLoad-2 18.82n ± 0% 10.41n ± 0% -44.69% (p=0.000 n=20) AtomicLoad-4 18.81n ± 0% 10.42n ± 0% -44.63% (p=0.000 n=20) AtomicLoad8 18.82n ± 0% 10.41n ± 0% -44.69% (p=0.000 n=20) AtomicLoad8-2 18.82n ± 0% 10.41n ± 0% -44.70% (p=0.000 n=20) AtomicLoad8-4 18.82n ± 0% 10.41n ± 0% -44.69% (p=0.000 n=20) geomean 18.82n 10.41n -44.68% Change-Id: I9d47c9d6f359c4f2e41035ca656429aade2e7847 Reviewed-on: https://go-review.googlesource.com/c/go/+/581357 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com> |
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