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-9683 Lustre <p>On creating a lustre filesystem (in IML automated test) with lustre version 2.9.58_86_g2383a62, the following was reported indicating a negative value for req_waittime stat (causing IML to not report the stat):</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java">[root@lotus-58vm16 ~]# less /proc/fs/lustre/mds/MDS/mdt/stats snapshot_time 1497888436.757961280 secs.nsecs req_waittime 54892 samples [usec] -8497 0 -4659765 1053607811 req_qdepth 54892 samples [reqs] 0 0 0 0 req_active 54892 samples [reqs] 1 1 54892 54892 req_timeout 54892 samples [sec] 1 10 54910 55090 reqbuf_avail 150546 samples [bufs] 63 64 9634690 616604158 ldlm_ibits_enqueue 13 samples [reqs] 1 1 13 13 mds_reint_setattr 1 samples [reqs] 1 1 1 1 mds_reint_open 8 samples [reqs] 1 1 8 8 mds_getattr 1 samples [usec] 44 44 44 1936 mds_connect 5 samples [usec] 27 16179 22451 297791095 mds_get_root 1 samples [usec] 15 15 15 225 mds_statfs 1 samples [usec] 26 26 26 676 mds_getxattr 2 samples [usec] 31 3259 3290 10622042 obd_ping 54868 samples [usec] 12 548 2165145 95976761</pre> </div></div> LU-9683

Negative value reported for req_waittime mdt stat

Bug Minor Resolved Fixed James A Simmons Tom Nabarro Mon, 19 Jun 2017 16:47:47 +0000 Thu, 10 Aug 2017 16:45:40 +0000 Sat, 29 Jul 2017 13:40:52 +0000 Lustre 2.9.0 Lustre 2.10.1 Lustre 2.11.0 0 5 <p>getting quite similar issue with sanity/127a:<br/> osc.lustre-OST0000-osc-MDT0000.stats=<br/> snapshot_time 1499863534.716076693 secs.nsecs<br/> osc.lustre-OST0000-osc-ffff8800c24ba800.stats=<br/> snapshot_time 1499863534.716169621 secs.nsecs<br/> req_waittime 5 samples <span class="error">&#91;usec&#93;</span> -980 0 -3637 2803447<br/> req_active 5 samples <span class="error">&#91;reqs&#93;</span> 1 1 5 5<br/> ost_punch 1 samples <span class="error">&#91;usec&#93;</span> -725 0 -725 525625<br/> ldlm_cancel 1 samples <span class="error">&#91;usec&#93;</span> -980 0 -980 960400</p> <p>I want just confirm that this is not rare issue or something that happens time to time. It is always so and time stats are broken at the moment</p> <p>I can take a look at this when I port the code to 64 bit time handling</p> <p><a href="https://review.whamcloud.com/#/c/28027/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/#/c/28027/</a></p> <p>Oleg Drokin (oleg.drokin@intel.com) merged in patch <a href="https://review.whamcloud.com/28027/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/28027/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9683" title="Negative value reported for req_waittime mdt stat" class="issue-link" data-issue-key="LU-9683"><del>LU-9683</del></a> ptlrpc: fix argument misorder<br/> Project: fs/lustre-release<br/> Branch: master<br/> Current Patch Set: <br/> Commit: 61c48e79fdfb825ea1ab2649cdadaccfb863155c</p> <p>Landed for 2.11</p> <p>James Simmons (uja.ornl@yahoo.com) uploaded a new patch: <a href="https://review.whamcloud.com/28290" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/28290</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9683" title="Negative value reported for req_waittime mdt stat" class="issue-link" data-issue-key="LU-9683"><del>LU-9683</del></a> ptlrpc: fix argument misorder<br/> Project: fs/lustre-release<br/> Branch: b2_10<br/> Current Patch Set: 1<br/> Commit: dde04af12cddd05e5414184f428a303b911b40a9</p> <p>John L. Hammond (john.hammond@intel.com) merged in patch <a href="https://review.whamcloud.com/28290/" class="external-link" target="_blank" rel="nofollow noopener">https://review.whamcloud.com/28290/</a><br/> Subject: <a href="https://jira.whamcloud.com/browse/LU-9683" title="Negative value reported for req_waittime mdt stat" class="issue-link" data-issue-key="LU-9683"><del>LU-9683</del></a> ptlrpc: fix argument misorder<br/> Project: fs/lustre-release<br/> Branch: b2_10<br/> Current Patch Set: <br/> Commit: 907f35db14e5b796bc4d722e16dc206d759e4a9a</p> Related LU-9019 Development Rank 1|hzzfcf: Rank (Obsolete) 9223372036854775807 Severity