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From "Sailesh Mukil (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-4456: Change query exec state lock to a reader-writer lock
Date Wed, 09 Nov 2016 21:24:32 GMT
Sailesh Mukil has uploaded a new patch set (#2).

Change subject: IMPALA-4456: Change query_exec_state_lock_ to a reader-writer lock
......................................................................

IMPALA-4456: Change query_exec_state_lock_ to a reader-writer lock

This patch includes a ported reader-writer lock implementation from
Google utils and is used to replace the mutex query_exec_state_lock_
to a RW lock.

This can reduce the amount of lock contention on this and translates
to big wins both in terms of performance and scalability.

Please refer the JIRA for more information.

Change-Id: I790a95e7179f07aa7ba188d5422c5e054353ba0b
---
M be/src/gutil/CMakeLists.txt
A be/src/gutil/read_write_lock.cc
A be/src/gutil/read_write_lock.h
M be/src/service/impala-beeswax-server.cc
M be/src/service/impala-hs2-server.cc
M be/src/service/impala-http-handler.cc
M be/src/service/impala-server.cc
M be/src/service/impala-server.h
A be/src/util/rw_lock.h
9 files changed, 174 insertions(+), 10 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/21/5021/2
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I790a95e7179f07aa7ba188d5422c5e054353ba0b
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Sailesh Mukil <sailesh@cloudera.com>

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