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-3112 Lustre <p>After enable ptlrpc module parameter suppress_pings, cannot get stats from MDS or OSS. If the suppress_pings is disabled, it works fine.</p> <p>MDS:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@fat-amd-1 ~]# cat /sys/module/ptlrpc/parameters/suppress_pings 1 [root@fat-amd-1 ~]# cat /proc/fs/lustre/mdt/lustre-MDT0000/stats [root@fat-amd-1 ~]# </pre> </div></div> <p>OSS:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@fat-amd-3 ~]# cat /proc/fs/lustre/obdfilter/lustre-OST0000/stats [root@fat-amd-3 ~]# </pre> </div></div> LU-3112

Cannot get stats from MDS and OSS after enable ptlrpc module parameter suppress_pings

Bug Minor Resolved Won't Do Li Wei Sarah Liu Fri, 5 Apr 2013 06:24:05 +0000 Fri, 8 Oct 2021 23:44:28 +0000 Fri, 8 Oct 2021 23:44:28 +0000 Lustre 2.4.0 0 2 <p>I can't reproduce this on the OSS:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@linux tests]# PTLDEBUG=-1 DEBUG_SIZE=64 MODOPTS_PTLRPC="suppress_pings=1" MGSDEV=/tmp/lustre-mgs ./llmount.sh [...] disable quota as required [root@linux tests]# cat /proc/fs/lustre/obdfilter/lustre-OST0000/stats snapshot_time 1365393105.574018 secs.usecs get_info 2 samples [reqs] set_info_async 2 samples [reqs] connect 2 samples [reqs] statfs 9 samples [reqs] create 2 samples [reqs] </pre> </div></div> <p>As to the MDS, this procfs entry should be used instead:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@linux tests]# cat /proc/fs/lustre/mds/MDS/mdt/stats snapshot_time 1365393296.454917 secs.usecs req_waittime 17 samples [usec] 46 259 1483 193635 req_qdepth 17 samples [reqs] 0 0 0 0 req_active 17 samples [reqs] 1 1 17 17 req_timeout 17 samples [sec] 1 10 35 215 reqbuf_avail 40 samples [bufs] 64 64 2560 163840 ldlm_ibits_enqueue 3 samples [reqs] 1 1 3 3 mds_getattr 1 samples [usec] 144 144 144 20736 mds_connect 6 samples [usec] 102 291 1116 232976 mds_getstatus 1 samples [usec] 77 77 77 5929 mds_statfs 4 samples [usec] 80 239 524 84678 obd_ping 1 samples [usec] 126 126 126 15876 </pre> </div></div> <p>P.S., I tried "suppress_pings=0". The lustre-MDT0000 stats did not has any contents as well:</p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@linux tests]# PTLDEBUG=-1 DEBUG_SIZE=64 MODOPTS_PTLRPC="suppress_pings=0" MGSDEV=/tmp/lustre-mgs ./llmount.sh [...] disable quota as required [root@linux tests]# cat /proc/fs/lustre/mds/MDS/mdt/stats snapshot_time 1365393695.697075 secs.usecs req_waittime 23 samples [usec] 47 1264 10682 8456720 req_qdepth 23 samples [reqs] 0 0 0 0 req_active 23 samples [reqs] 1 1 23 23 req_timeout 23 samples [sec] 1 10 41 221 reqbuf_avail 50 samples [bufs] 64 64 3200 204800 mds_getattr 1 samples [usec] 162 162 162 26244 mds_connect 6 samples [usec] 102 507 1460 479340 mds_getstatus 1 samples [usec] 102 102 102 10404 mds_statfs 2 samples [usec] 115 926 1041 870701 obd_ping 13 samples [usec] 80 117 1264 124682 [root@linux tests]# cat /proc/fs/lustre/mdt/lustre-MDT0000/stats [root@linux tests]# </pre> </div></div> <p>Have you tried on multiple nodes? I can also get the OSS stats all in one node, while still get nothing with server and clients on separate nodes </p> <div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent"> <pre>[root@client-5 tests]# PDSH="pdsh -t 300 -S -w" NAME=ncli mgs_HOST=client-18 MGSDEV=/dev/sda3 SINGLEMDS=mds mds_HOST=fat-amd-1 ost_HOST=fat-amd-3 ost1_HOST=$ost_HOST MDSDEV=/dev/sdb1 MDSDEV1=$MDSDEV MDSSIZE=2000000 OSTCOUNT=1 OSTSIZE=25000000 OSTDEV1=/dev/sdc1 MODOPTS_PTLRPC="suppress_pings=1" REFORMAT="--reformat" DEBUG_SIZE=48 SLOW=yes bash llmount.sh [root@fat-amd-3 ~]# cat /proc/fs/lustre/obdfilter/lustre-OST0000/stats [root@fat-amd-3 ~]# </pre> </div></div> Development Rank 1|hzvn5z: Rank (Obsolete) 7563 Severity