https://jira.whamcloud.com This file is an XML representation of an issue en-us 9.4.14 940014 05-12-2023 https://jira.whamcloud.com/browse/LU-12629 Lustre <p>Large CPU usage found during obdecho-survey test. Based on profiling, page allocation is result of it. Looking in lustre logs, lu_env used to store paged don't reused and allocated for each call. as obdecho env already uses an CL tag, it good to reuse a cl env cache as similar as does for md operations.</p> LU-12629

large CPU usage during obdecho-survey test

Bug Major Resolved Duplicate WC Triage Alexey Lyashkov Tue, 6 Aug 2019 05:47:21 +0000 Thu, 8 Aug 2019 13:22:37 +0000 Thu, 8 Aug 2019 13:22:37 +0000 0 5 <p>looks like a dup of <a href="https://jira.whamcloud.com/browse/LU-12578" title="obdfilter-survey w/echo-client does not gain from direct-io optimizations" class="issue-link" data-issue-key="LU-12578"><del>LU-12578</del></a>. I agree we should try to reuse cl_env_get() infrastructure.</p> <p>Alexey Lyashkov (c17817@cray.com) uploaded a new patch: <a href="https://review.whamcloud.com/35700" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/35700</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-12629" title="large CPU usage during obdecho-survey test" class="issue-link" data-issue-key="LU-12629"><del>LU-12629</del></a> obdecho: reuse an cl env cache for obdecho survey<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: 1<br/> Commit: 77a201012961541bbe51b59f1409fabccfc37044</p> <p>Alex, probably. <a href="https://jira.whamcloud.com/browse/LU-12578" title="obdfilter-survey w/echo-client does not gain from direct-io optimizations" class="issue-link" data-issue-key="LU-12578"><del>LU-12578</del></a> is declined to submit. with attached patch CPU dropped by 90%, bw is increased by 10%-30% as CPU isn't bottleneck now.</p> <p>resubmit for <a href="https://jira.whamcloud.com/browse/LU-12578" title="obdfilter-survey w/echo-client does not gain from direct-io optimizations" class="issue-link" data-issue-key="LU-12578"><del>LU-12578</del></a>, this ticket can close.</p> <p>Alexey - for future reference you should have the ability to mark tickets as RESOLVED</p> Development Rank 1|i00kp3: Rank (Obsolete) 9223372036854775807 Severity