Dan Hecht has uploaded a new patch set (#2). Change subject: IMPALA-3161: (part 2) gperfutil SpinLock suffers from potential wakeup delay ......................................................................
IMPALA-3161: (part 2) gperfutil SpinLock suffers from potential wakeup delay Backport this patch from gperfutil github: >From 560ca8650c8a9d2971420970f0ed5e17848150eb Mon Sep 17 00:00:00 2001 From: "[email protected]" <[email protected]@6b5cf1ce-ec42-a296-1ba9-69fdba395a50> Date: Sun, 10 Mar 2013 20:02:46 +0000 Subject: [PATCH] issue-491: Significant performance improvement for spin lock contention This patch fixes issues where spinlocks under contention were failing to wakeup waiters, sometimes resulting in blow ups from 13ns to as high as 256ms. Under heavy contention, applications were observed sleeping for minutes at a time giving the appearance of a hang. Change-Id: I660908144ee4525bde5511ca5252c9fba33d1cb2 --- M thirdparty/gperftools-2.0/src/base/spinlock.h 1 file changed, 2 insertions(+), 8 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala refs/changes/00/2500/2 -- To view, visit http://gerrit.cloudera.org:8080/2500 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: newpatchset Gerrit-Change-Id: I660908144ee4525bde5511ca5252c9fba33d1cb2 Gerrit-PatchSet: 2 Gerrit-Project: Impala Gerrit-Branch: cdh5-trunk Gerrit-Owner: Dan Hecht <[email protected]> Gerrit-Reviewer: Dan Hecht <[email protected]> Gerrit-Reviewer: Henry Robinson <[email protected]>
