RFR: 8266332: Adler32 intrinsic for x86 64-bit platforms [v6]

Xubo Zhang github.com+58006833+xbzhang99 at openjdk.java.net
Thu May 6 17:12:37 UTC 2021


> Implement Adler32 intrinsic for x86 64-bit platform using vector instructions.
> 
> For the following benchmark:
> http://cr.openjdk.java.net/~pli/rfr/8216259/TestAdler32.java
> 
> The optimization shows ~5x improvement.
> 
> Base:
> Benchmark (count) Mode Cnt Score Error Units
> TestAdler32Perf.testAdler32Update 64 avgt 25 0.084 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 128 avgt 25 0.104 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 256 avgt 25 0.146 ± 0.002 us/op
> TestAdler32Perf.testAdler32Update 512 avgt 25 0.226 ± 0.002 us/op
> TestAdler32Perf.testAdler32Update 1024 avgt 25 0.390 ± 0.005 us/op
> TestAdler32Perf.testAdler32Update 2048 avgt 25 0.714 ± 0.007 us/op
> TestAdler32Perf.testAdler32Update 4096 avgt 25 1.359 ± 0.014 us/op
> TestAdler32Perf.testAdler32Update 8192 avgt 25 2.751 ± 0.023 us/op
> TestAdler32Perf.testAdler32Update 16384 avgt 25 5.494 ± 0.077 us/op
> TestAdler32Perf.testAdler32Update 32768 avgt 25 11.058 ± 0.160 us/op
> TestAdler32Perf.testAdler32Update 65536 avgt 25 22.198 ± 0.319 us/op
> 
> 
> With patch:
> Benchmark (count) Mode Cnt Score Error Units
> TestAdler32Perf.testAdler32Update 64 avgt 25 0.020 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 128 avgt 25 0.025 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 256 avgt 25 0.031 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 512 avgt 25 0.048 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 1024 avgt 25 0.078 ± 0.001 us/op
> TestAdler32Perf.testAdler32Update 2048 avgt 25 0.139 ± 0.002 us/op
> TestAdler32Perf.testAdler32Update 4096 avgt 25 0.262 ± 0.004 us/op
> TestAdler32Perf.testAdler32Update 8192 avgt 25 0.524 ± 0.010 us/op
> TestAdler32Perf.testAdler32Update 16384 avgt 25 1.017 ± 0.022 us/op
> TestAdler32Perf.testAdler32Update 32768 avgt 25 2.058 ± 0.052 us/op
> TestAdler32Perf.testAdler32Update 65536 avgt 25 3.994 ± 0.013 us/op

Xubo Zhang has updated the pull request incrementally with one additional commit since the last revision:

  remove checking AVX_512 in vbroadcastf128

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/3806/files
  - new: https://git.openjdk.java.net/jdk/pull/3806/files/172d7c63..72a0d3f3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3806&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3806&range=04-05

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3806.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3806/head:pull/3806

PR: https://git.openjdk.java.net/jdk/pull/3806


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