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From "Jim Apple (Code Review)" <ger...@cloudera.org>
Subject [Impala-CR](cdh5-trunk) Use AVX2 operations to speedup Bloom filter insert by 10-50%.
Date Wed, 08 Jun 2016 21:43:52 GMT
Jim Apple has posted comments on this change.

Change subject: Use AVX2 operations to speedup Bloom filter insert by 10-50%.
......................................................................


Patch Set 4:

> It looks like it hit this on one of the builds:
 > 
 > 11:45:59 /tmp/cc4RuPOa.s: Assembler messages:
 > 11:45:59 /tmp/cc4RuPOa.s:19102: Error: no such instruction:
 > `vpsrlvq -208(%rbp),%ymm0,%ymm0'
 > 11:45:59 /tmp/cc4RuPOa.s:19115: Error: operand type mismatch for
 > `vpand'
 > 11:45:59 /tmp/cc4RuPOa.s:19128: Error: no such instruction:
 > `vpsllvq -336(%rbp),%ymm0,%ymm0'
 > 11:45:59 /tmp/cc4RuPOa.s:19148: Error: operand type mismatch for
 > `vpor'
 > 
 > That's an avx2 instruction, so I guess on some systems it's trying
 > to use some assembler that doesn't support AVX2?

I filed https://jira.cloudera.com/browse/RELENG-734 to ask for newer linkers on all build
machines.

Also, I spent some time trying to recreate a query that speeds up either end-to-end or in
the build time of a hash join, but did not succeed in finding one.

-- 
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Gerrit-MessageType: comment
Gerrit-Change-Id: I6fef4f6652876f8fd7e3f0e41431702380418c98
Gerrit-PatchSet: 4
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Jim Apple <jbapple@cloudera.com>
Gerrit-Reviewer: Jim Apple <jbapple@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-HasComments: No

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