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https://issues.apache.org/jira/browse/HADOOP-19724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18040298#comment-18040298
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ASF GitHub Bot commented on HADOOP-19724:
-----------------------------------------
leiwen2025 commented on PR #8031:
URL: https://github.com/apache/hadoop/pull/8031#issuecomment-3570455914
> @PeterPtroc as noted, @leiwen2025 can help here.
>
> @leiwen2025 -can you look at this PR as is and review it. Ideally: check
it out and do a -Pnative build running the native tests.
>
> If you two are using different instructions, how do they differ.
>
> Having just looked at what clmul/clmulh does, I can see why it offers
benefits
>
> * how common is the instruction?
> * @leiwen2025 how does your vectorized compare? This opcode is intended to
be pipelined and the opcode is designed for these kind of encryption/checksum
algorithms.
>
> Looking at #7912 it's calling vclmul.vv -this is generally going to be
faster, isn't it?
>
> Which means that while the code is more complex, ultimately it's going be
the best option on cores with the right feature flaggs.
>
> This makes me think that this one can go in but the vector one goes in as
the followup, with the choice of operation dependent on feature, with priority
of: vclmul, cmul, classic.
@steveloughran Thanks! I’m happy to help. I’ll check out the PR as-is and
run a `-Pnative` build with the native tests to verify. Will report back once I
have the results.
> [RISC-V] Add rv bulk CRC32 (non-CRC32C) optimized path
> -------------------------------------------------------
>
> Key: HADOOP-19724
> URL: https://issues.apache.org/jira/browse/HADOOP-19724
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: hadoop-common
> Affects Versions: 3.5.0
> Reporter: Ptroc
> Priority: Major
> Labels: native, pull-request-available, risc-v
>
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