Hello David Ribeiro Alves, Kudu Jenkins, Adar Dembo, I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/6597 to look at the new patch set (#2). Change subject: cache: reduce contention on MemTracker::Release and Consume ...................................................................... cache: reduce contention on MemTracker::Release and Consume In an old benchmark about a year ago, this improved YCSB load throughput from ~450k ops/sec to ~570k. For the newly-added cache-bench, this improves performance substnatially (16x) for the scenario with high churn: Before: [ RUN ] Patterns/CacheBench.RunBench/3 I0425 13:59:17.307648 95430 cache-bench.cc:176] Warming up... I0425 13:59:18.308992 95430 cache-bench.cc:179] Running benchmark... I0425 13:59:19.313868 95430 cache-bench.cc:187] UNIFORM ratio=3.00x n_unique=786432: 2.48M lookups/sec I0425 13:59:19.313891 95430 cache-bench.cc:188] UNIFORM ratio=3.00x n_unique=786432: 33.3% hit rate [ OK ] Patterns/CacheBench.RunBench/3 (2192 ms) After: [ RUN ] Patterns/CacheBench.RunBench/3 I0425 13:57:40.581399 94314 cache-bench.cc:176] Warming up... I0425 13:57:41.582798 94314 cache-bench.cc:179] Running benchmark... I0425 13:57:42.583904 94314 cache-bench.cc:187] UNIFORM ratio=3.00x n_unique=786432: 39.53M lookups/sec I0425 13:57:42.583930 94314 cache-bench.cc:188] UNIFORM ratio=3.00x n_unique=786432: 33.3% hit rate [ OK ] Patterns/CacheBench.RunBench/3 (2055 ms) Change-Id: Ic3bd24a452761b06611215f4831ef02238ba14bc --- M src/kudu/util/cache.cc 1 file changed, 40 insertions(+), 2 deletions(-) git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/97/6597/2 -- To view, visit http://gerrit.cloudera.org:8080/6597 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: kudu Gerrit-Branch: master Gerrit-MessageType: newpatchset Gerrit-Change-Id: Ic3bd24a452761b06611215f4831ef02238ba14bc Gerrit-Change-Number: 6597 Gerrit-PatchSet: 2 Gerrit-Owner: Todd Lipcon <t...@apache.org> Gerrit-Reviewer: Adar Dembo <a...@cloudera.com> Gerrit-Reviewer: David Ribeiro Alves <davidral...@gmail.com> Gerrit-Reviewer: Kudu Jenkins Gerrit-Reviewer: Todd Lipcon <t...@apache.org>