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2022-07-05 - 00:18

x86 Intel Celeron M @1500 MHz, Linux 5.15.32-rt39 (Profile)

Latency plot of system in rack #6, slot #5
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -n -a0 -t1 -p99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 20 highest latencies:
System rack6slot5.osadl.org (updated Mon Jul 04, 2022 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
61989985544598,3953cyclictest26109-21kworker/0:007:12:280
61989960103174,2785cyclictest26109-21kworker/0:007:16:010
58722885183,204sleep00-21swapper07:07:580
61989955214,280cyclictest23596-21runrttasks07:55:480
61989948936,391cyclictest12-21rcu_preempt07:41:130
61989948533,439cyclictest18902-21ssh10:21:590
61989948533,438cyclictest647-21ssh10:54:090
61989946832,436cyclictest0-21swapper07:21:260
61989946632,434cyclictest0-21swapper08:49:000
61989946432,371cyclictest28219-21rm10:42:410
61989946035,75cyclictest13620-21munin-node07:30:330
61989944873,362cyclictest18107-21diskmemload09:39:050
61989944731,233cyclictest20401-21ssh11:39:000
61989944539,148cyclictest0-21swapper10:29:370
61989944372,358cyclictest345450irq/10-yenta11:51:350
61989943564,358cyclictest11-21ksoftirqd/011:59:000
61989943533,332cyclictest3404-21df08:30:250
61989943238,379cyclictest4906-21runrttasks12:34:030
61989942937,377cyclictest12628-21munin-node11:20:220
61989942233,373cyclictest10503-21latency_hist10:05:040
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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