Youwei Wang has uploaded a new patch set (#33). Change subject: IMPALA-2809: Improve ByteSwap with builtin function or SSSE3 or AVX2. ......................................................................
IMPALA-2809: Improve ByteSwap with builtin function or SSSE3 or AVX2. Using SSSE3/AVX2 intrinsic to accelerate the function "static inline void ByteSwap(void* dst, const void* src, int len)" of BitUtil class, and a scalar byte-swap routine is added as fallback. Also the runtime selector for CPUs of different capacity is included, as well as performance test and data verification. Brief performance comparison is listed here: CPU: Intel(R) Core(TM) i5-4460 CPU@3.20GHz Result: Old Impala: 1X Faster Scala: 1.021X SSSE3: 10.59X AVX2: 25.78X SIMD: 24.86X Change-Id: I392ed5a8d5683f30f161282c228c1aedd7b648c1 --- M be/src/benchmarks/CMakeLists.txt A be/src/benchmarks/bswap-benchmark.cc M be/src/exprs/string-functions-ir.cc M be/src/util/bit-util-test.cc M be/src/util/bit-util.cc M be/src/util/bit-util.h 6 files changed, 381 insertions(+), 51 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/81/3081/33 -- To view, visit http://gerrit.cloudera.org:8080/3081 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: I392ed5a8d5683f30f161282c228c1aedd7b648c1 Gerrit-PatchSet: 33 Gerrit-Project: Impala Gerrit-Branch: cdh5-trunk Gerrit-Owner: Youwei Wang <youwei.a.w...@intel.com> Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com> Gerrit-Reviewer: Jim Apple <jbap...@cloudera.com> Gerrit-Reviewer: Marcel Kornacker <mar...@cloudera.com> Gerrit-Reviewer: Mostafa Mokhtar <mmokh...@cloudera.com> Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com> Gerrit-Reviewer: Youwei Wang <youwei.a.w...@intel.com>