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2025-07-15 - 15:33
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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
Characteristics of the 20 highest latencies:
System rackcslot2.osadl.org (updated Tue Jul 15, 2025 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2295527258,9sleep10-21swapper/119:06:501
2266426955,9sleep00-21swapper/019:03:470
235312660,0sleep10-21swapper/122:59:591
23223993131,0cyclictest0-21swapper/119:09:351
23223992910,2cyclictest0-21swapper/122:04:351
23222992711,2cyclictest0-21swapper/021:13:460
23222992710,1cyclictest0-21swapper/022:34:040
23222992710,0cyclictest0-21swapper/020:08:200
23223992614,4cyclictest0-21swapper/123:14:171
23223992610,16cyclictest0-21swapper/121:52:131
23222992610,9cyclictest0-21swapper/022:42:590
23223992523,1cyclictest24521-21/usr/sbin/munin22:17:561
23223992519,5cyclictest9761-21apache222:12:041
23223992510,3cyclictest0-21swapper/122:57:091
23222992514,6cyclictest17204-21ssh22:51:550
23222992513,7cyclictest0-21swapper/023:03:030
23222992513,1cyclictest23220-21cyclictest22:22:580
2322399243,16cyclictest0-21swapper/100:15:041
23223992423,1cyclictest0-21swapper/123:59:361
23223992418,4cyclictest9761-21apache221:41:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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