| commit | 9ccf5b8e86ce98494a2127196fbc47d72b0a71a5 | [log] [tgz] |
|---|---|---|
| author | Lynn Boger <laboger@linux.vnet.ibm.com> | Fri Apr 08 13:50:00 2022 -0500 |
| committer | Lynn Boger <laboger@linux.vnet.ibm.com> | Tue Apr 12 13:54:06 2022 +0000 |
| tree | daf3fee03b35231a1902eace1b9a0537639903eb | |
| parent | d6320f1a58f1f7820daee06a086c83a0274a777f [diff] |
runtime: improve memmove for ppc64x This improves performance of memmove for larger moves by unrolling the main loop from 32 byte to 64 byte moves. The improvement of the relevant sizes on a power9: Memmove/64 5.11ns ± 0% 5.00ns ± 0% -2.21% Memmove/128 8.26ns ± 0% 5.88ns ± 0% -28.83% Memmove/256 12.7ns ± 0% 8.6ns ± 0% -31.94% Memmove/512 17.9ns ± 0% 14.3ns ± 0% -19.87% Memmove/1024 33.3ns ± 0% 27.0ns ± 0% -18.92% Memmove/2048 72.1ns ± 0% 51.8ns ± 0% -28.25% Memmove/4096 126ns ± 0% 110ns ± 0% -12.63% Change-Id: I74162a9f152d7752a8281da1b89a66da99a3fdc9 Reviewed-on: https://go-review.googlesource.com/c/go/+/399499 Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com>
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