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2024-12-26 - 11:54
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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
Characteristics of the 20 highest latencies:
System rackcslot2.osadl.org (updated Thu Dec 26, 2024 00:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
733826956,9sleep10-21swapper/119:05:101
762126349,9sleep00-21swapper/019:08:070
796299290,3cyclictest0-21swapper/100:15:511
7961992929,0cyclictest0-21swapper/021:32:220
796199290,23cyclictest0-21swapper/020:29:310
7961992827,1cyclictest7-21ksoftirqd/022:59:220
7961992824,3cyclictest7947-21apache222:19:180
7961992823,2cyclictest7941-21apache221:34:490
7962992710,15cyclictest0-21swapper/121:33:451
7961992710,2cyclictest0-21swapper/023:26:560
7962992616,6cyclictest795-21sendmail-mta23:04:261
7962992610,11cyclictest0-21swapper/121:18:411
7962992610,0cyclictest0-21swapper/123:34:541
7962992610,0cyclictest0-21swapper/120:22:341
796299253,2cyclictest10742-21ssh22:18:311
7962992525,0cyclictest0-21swapper/123:43:521
796299250,2cyclictest2983-21/usr/sbin/munin22:09:271
7961992510,0cyclictest0-21swapper/022:02:310
796299243,4cyclictest0-21swapper/100:29:281
796299243,0cyclictest15450-21ssh00:35:581
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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