Tim Armstrong has uploaded a new patch set (#3). ( http://gerrit.cloudera.org:8080/8408 )
Change subject: IMPALA-6121: remove I/O mgr request context cache ...................................................................... IMPALA-6121: remove I/O mgr request context cache This simplifies the lifecycle of the request contexts and eliminates some code. The comments claim that request context cache improves performance when allocating smallish the objects. But allocating from TCMalloc's thread caches should scale much better than a global object pool protected by a lock. I needed to move the definition to a non-internal header file so that it was visible to clients that manage it by unique_ptr. We also do not need to transfer the request contexts to the RuntimeState since I/O buffers do not leave scanners now. Testing: Ran exhaustive tests. Change-Id: I91414eceaa4938fccd74686fe6bebede6ef36108 --- M be/src/exec/hdfs-scan-node-base.cc M be/src/exec/hdfs-scan-node-base.h M be/src/exec/hdfs-scan-node-mt.cc M be/src/exec/hdfs-scan-node.cc M be/src/runtime/disk-io-mgr-internal.h M be/src/runtime/disk-io-mgr-reader-context.cc A be/src/runtime/disk-io-mgr-reader-context.h M be/src/runtime/disk-io-mgr-stress.cc M be/src/runtime/disk-io-mgr-test.cc M be/src/runtime/disk-io-mgr.cc M be/src/runtime/disk-io-mgr.h M be/src/runtime/runtime-state.cc M be/src/runtime/runtime-state.h M be/src/runtime/tmp-file-mgr-test.cc M be/src/runtime/tmp-file-mgr.cc M be/src/runtime/tmp-file-mgr.h 16 files changed, 614 insertions(+), 780 deletions(-) git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/08/8408/3 -- To view, visit http://gerrit.cloudera.org:8080/8408 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: newpatchset Gerrit-Change-Id: I91414eceaa4938fccd74686fe6bebede6ef36108 Gerrit-Change-Number: 8408 Gerrit-PatchSet: 3 Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
