hash/crc32: improve performance for ppc64le #19570
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CL https://golang.org/cl/38184 mentions this issue. |
ceseo
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May 17, 2017
This change improves the performance of crc32 for ppc64le by using vpmsum and other vector instructions in the algorithm. The testcase was updated to test more sizes. Fixes golang#19570 BenchmarkCRC32/poly=IEEE/size=15/align=0-8 90.5 81.8 -9.61% BenchmarkCRC32/poly=IEEE/size=15/align=1-8 89.7 81.7 -8.92% BenchmarkCRC32/poly=IEEE/size=40/align=0-8 93.2 61.1 -34.44% BenchmarkCRC32/poly=IEEE/size=40/align=1-8 92.8 60.9 -34.38% BenchmarkCRC32/poly=IEEE/size=512/align=0-8 501 55.8 -88.86% BenchmarkCRC32/poly=IEEE/size=512/align=1-8 502 132 -73.71% BenchmarkCRC32/poly=IEEE/size=1kB/align=0-8 947 69.9 -92.62% BenchmarkCRC32/poly=IEEE/size=1kB/align=1-8 946 144 -84.78% BenchmarkCRC32/poly=IEEE/size=4kB/align=0-8 3602 186 -94.84% BenchmarkCRC32/poly=IEEE/size=4kB/align=1-8 3603 263 -92.70% BenchmarkCRC32/poly=IEEE/size=32kB/align=0-8 28404 1338 -95.29% BenchmarkCRC32/poly=IEEE/size=32kB/align=1-8 28856 1405 -95.13% BenchmarkCRC32/poly=Castagnoli/size=15/align=0-8 89.7 81.8 -8.81% BenchmarkCRC32/poly=Castagnoli/size=15/align=1-8 89.8 81.9 -8.80% BenchmarkCRC32/poly=Castagnoli/size=40/align=0-8 93.8 61.4 -34.54% BenchmarkCRC32/poly=Castagnoli/size=40/align=1-8 94.3 61.3 -34.99% BenchmarkCRC32/poly=Castagnoli/size=512/align=0-8 503 56.4 -88.79% BenchmarkCRC32/poly=Castagnoli/size=512/align=1-8 502 132 -73.71% BenchmarkCRC32/poly=Castagnoli/size=1kB/align=0-8 941 70.2 -92.54% BenchmarkCRC32/poly=Castagnoli/size=1kB/align=1-8 943 145 -84.62% BenchmarkCRC32/poly=Castagnoli/size=4kB/align=0-8 3588 186 -94.82% BenchmarkCRC32/poly=Castagnoli/size=4kB/align=1-8 3595 264 -92.66% BenchmarkCRC32/poly=Castagnoli/size=32kB/align=0-8 28266 1323 -95.32% BenchmarkCRC32/poly=Castagnoli/size=32kB/align=1-8 28344 1404 -95.05% Change-Id: Ic4d8274c66e0e87bfba5f609f508a3877aee6bb5 Reviewed-on: https://go-review.googlesource.com/38184 Reviewed-by: David Chase <drchase@google.com>
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Please answer these questions before submitting your issue. Thanks!
What version of Go are you using (
go version)?go tip
What operating system and processor architecture are you using (
go env)?Ubuntu 16.04 ppc64le
What did you do?
Analyzing performance for hash/crc32 on ppc64le.
Found an existing asm implementation dramatically improves performance on ppc64le, and implemented that for Go.
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