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2025-11-22 - 07:12
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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.osadl.org (updated Sat Nov 22, 2025 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
4895212515,80sleep24924-21/usr/sbin/munin19:04:502
60579912142,69cyclictest0-21swapper/023:54:590
60579912142,69cyclictest0-21swapper/023:54:590
6057991143,22cyclictest18989-21/usr/sbin/munin23:04:570
6057991135,36cyclictest6180-21apt-get22:44:390
746521090,7sleep30-21swapper/322:45:503
60579910647,52cyclictest8012-21cut19:14:310
6057991063,24cyclictest28604-21runrttasks21:34:440
60579910537,59cyclictest0-21swapper/000:35:010
60579910537,59cyclictest0-21swapper/000:35:010
6057991052,22cyclictest31530-21cpuspeed21:39:390
6057991052,22cyclictest31530-21cpuspeed21:39:390
60579910446,52cyclictest6048-21cyclictest23:12:460
60579910428,71cyclictest0-21swapper/021:14:360
60579910337,59cyclictest0-21swapper/020:04:270
6057991033,20cyclictest17985-21find19:44:330
60579910328,67cyclictest0-21swapper/022:14:570
60579910314,29cyclictest20448-21grep21:20:010
60739910266,8cyclictest181rcu_preempt20:09:242
6057991023,38cyclictest18785-21find23:59:330
6057991023,31cyclictest25414-21sh21:29:370
6057991022,29cyclictest11021-21latency_hist21:59:260
6057991014,31cyclictest30536-21runrttasks00:19:400
6057991013,28cyclictest7665-21grep20:49:570
6057991013,21cyclictest355-21runrttasks23:29:100
6057991003,33cyclictest29740-21kernelversion22:29:480
6057991003,33cyclictest29740-21kernelversion22:29:480
6057991002,20cyclictest27660-21awk20:14:230
607399996,49cyclictest18538-21latency_hist23:59:252
607399996,49cyclictest18538-21latency_hist23:59:252
6057999940,50cyclictest0-21swapper/000:29:460
605799993,31cyclictest24939-21rm23:14:560
605799993,29cyclictest7738-21modprobe21:54:230
605799993,29cyclictest3945-21cstates23:34:400
605799993,28cyclictest5611-21latency_hist22:44:270
605799992,25cyclictest3615-21cat23:34:250
605799992,25cyclictest3615-21cat23:34:250
605799992,24cyclictest2419-21ssh22:38:590
605799992,20cyclictest28883-21unixbench_singl20:14:590
605799984,29cyclictest9778-21/usr/sbin/munin23:44:470
605799983,30cyclictest24661-21/usr/sbin/munin00:09:490
605799983,28cyclictest29252-21latency_hist22:29:270
605799983,28cyclictest23172-21switchtime21:24:590
605799983,28cyclictest23172-21switchtime21:24:590
605799983,20cyclictest28002-21kernelversion00:14:500
605799982,26cyclictest6245-21/usr/sbin/munin19:09:490
605799974,31cyclictest26042-21latency_hist20:09:260
605799974,30cyclictest355-21runrttasks22:12:330
605799974,30cyclictest3537-21/usr/sbin/munin20:39:520
605799973,40cyclictest23004-21ssh00:05:190
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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