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2024-07-27 - 07:54
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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 20 highest latencies:
System rackbslot7.osadl.org (updated Sat Jul 27, 2024 00:44:19)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
69252990,4chrt12352-21diskmemload22:42:553
69252990,4chrt12352-21diskmemload22:42:553
512899973,64cyclictest18764-21/usr/sbin/munin23:56:482
145302930,4chrt14529-21ssh22:02:070
512899923,61cyclictest23354-21apt-get23:11:432
5139999025,55cyclictest7241-21apt-get00:31:443
248522900,9sleep0161rcuc/021:26:330
5128998850,13cyclictest141rcu_preempt20:01:332
5128998850,13cyclictest141rcu_preempt20:01:332
5139998733,38cyclictest12352-21diskmemload21:07:013
5116998770,11cyclictest26980-21munin-plugin-st20:11:300
57462850,8sleep30-21swapper/323:35:023
5128998359,16cyclictest4257-21munin-plugin-st20:41:302
37862819,31sleep20-21swapper/219:01:562
512899803,53cyclictest20445-21ssh21:18:052
512899803,53cyclictest20445-21ssh21:18:052
512899792,50cyclictest30307-21runrttasks21:35:222
512899792,50cyclictest30307-21runrttasks21:35:222
5139997840,30cyclictest41-21ksoftirqd/319:16:533
5139997840,30cyclictest41-21ksoftirqd/319:16:533
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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