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From "Jim Apple (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-4300: Speed up BloomFilter::Or with SIMD
Date Sun, 23 Oct 2016 17:53:27 GMT
Jim Apple has uploaded a new change for review.

  http://gerrit.cloudera.org:8080/4813

Change subject: IMPALA-4300: Speed up BloomFilter::Or with SIMD
......................................................................

IMPALA-4300: Speed up BloomFilter::Or with SIMD

Manually vectorizing speeds up BloomFilter::Or by up to 184x.

The existing loop should auto-vectorize with our GCC setting of -O3,
but it does not for reasons that remain mysterious.

Change-Id: I840799d9cfb81285c796e2abfe2029bb869b0f67
---
M be/src/benchmarks/bloom-filter-benchmark.cc
M be/src/testutil/mem-util.h
M be/src/util/bloom-filter.cc
M be/src/util/cpu-info.cc
M be/src/util/cpu-info.h
5 files changed, 177 insertions(+), 75 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/13/4813/1
-- 
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Gerrit-MessageType: newchange
Gerrit-Change-Id: I840799d9cfb81285c796e2abfe2029bb869b0f67
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Jim Apple <jbapple@cloudera.com>

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