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2024-02-23 - 20:52
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Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rackbslot7 (updated Fri Feb 23, 2024 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1454521180,4chrt14370-21/usr/sbin/munin07:34:440
1454521180,4chrt14370-21/usr/sbin/munin07:34:440
4541210114,62sleep04172-21/usr/sbin/munin07:04:560
5698998728,11cyclictest14608-21ssh11:09:053
5698998540,36cyclictest0-21swapper/309:39:173
5690998562,14cyclictest5038-21fschecks_count11:49:452
569899833,22cyclictest31834-21grep10:40:003
569899823,24cyclictest25040-21grep09:29:583
569899823,24cyclictest25040-21grep09:29:583
569899823,18cyclictest9036-21grep08:55:003
5690998261,14cyclictest773-21unixbench_singl09:45:012
5682998230,20cyclictest12607-21cut07:29:201
5682998230,20cyclictest12607-21cut07:29:201
5698998123,12cyclictest0-21swapper/310:14:443
5698998122,12cyclictest0-21swapper/308:59:583
5698998121,50cyclictest0-21swapper/312:34:453
5698998118,11cyclictest0-21swapper/310:02:253
5698998118,11cyclictest0-21swapper/310:02:253
569899803,20cyclictest16089-21fschecks_time09:14:473
569899803,19cyclictest15914-21latency_hist07:39:203
569899803,19cyclictest15914-21latency_hist07:39:203
569899793,22cyclictest16250-21fschecks_time07:39:453
569899793,20cyclictest23391-21grep07:59:593
5698997922,49cyclictest28277-21apt-key11:34:193
5698997919,10cyclictest0-21swapper/310:49:193
5698997919,10cyclictest0-21swapper/310:49:193
5698997910,13cyclictest0-21swapper/310:34:203
5682997933,17cyclictest2927-21tail11:45:021
5682997933,17cyclictest2927-21tail11:45:021
569899783,18cyclictest25040-21unixbench_multi08:05:003
5698997822,6cyclictest0-21swapper/312:10:013
569899782,20cyclictest32371-21fschecks_count09:44:453
569899773,21cyclictest276-21systemd-journal11:04:173
569899773,20cyclictest20218-21/usr/sbin/munin12:14:543
569899773,19cyclictest5218-21grep10:50:053
5698997725,46cyclictest0-21swapper/309:50:003
5698997725,46cyclictest0-21swapper/309:50:003
5698997722,14cyclictest276-21systemd-journal08:29:183
5698997722,14cyclictest276-21systemd-journal08:29:183
5698997719,37cyclictest417-21snmpd11:34:423
5698997719,37cyclictest417-21snmpd11:34:423
5698997718,9cyclictest11148-21fschecks_time10:04:483
5698997715,13cyclictest0-21swapper/311:14:473
5682997747,23cyclictest0-21swapper/107:14:201
569899764,19cyclictest23450-21fschecks_count11:24:443
569899764,17cyclictest5845-21grep11:49:593
569899763,26cyclictest20887-21cut11:19:463
569899763,18cyclictest7786-21latency_hist09:59:183
569899763,18cyclictest7383-21grep08:49:563
569899763,18cyclictest7383-21grep08:49:563
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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