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2026-03-20 - 04:49
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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 rack5slot2.osadl.org (updated Fri Mar 20, 2026 00:44:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177492206190,11sleep10-21swapper/119:09:561
176172195177,13sleep00-21swapper/019:08:150
176052195178,12sleep30-21swapper/319:08:063
175942171155,11sleep20-21swapper/219:07:572
314692520,0sleep031472-21latency_hist21:50:010
244032390,0sleep10-21swapper/121:45:451
179629991,7cyclictest0-21swapper/023:05:110
179629991,4cyclictest28842-21munin-run20:35:010
179629980,4cyclictest21208-21apt-get20:20:000
179709971,5cyclictest0-21swapper/200:15:122
179709971,5cyclictest0-21swapper/200:15:122
179629973,4cyclictest9216-21munin-run21:55:010
179739960,6cyclictest0-21swapper/323:44:293
179689961,2cyclictest0-21swapper/100:25:121
179629962,4cyclictest19139-21munin-run23:35:010
179629961,3cyclictest0-21swapper/022:20:120
179629960,3cyclictest3893-21munin-run19:45:010
179629960,3cyclictest12777-21awk23:00:000
179739950,5cyclictest0-21swapper/323:59:273
179739950,5cyclictest0-21swapper/319:40:113
179739950,5cyclictest0-21swapper/319:18:473
179739950,4cyclictest7363-21perl22:25:153
179739950,4cyclictest6882-21irqstats00:00:173
179739950,4cyclictest24017-21ssh00:25:123
179739950,4cyclictest14014-21apt-get20:05:113
179739950,4cyclictest12588-21memory21:05:173
179739950,4cyclictest12588-21memory21:05:173
179739950,4cyclictest0-21swapper/322:55:123
179739950,0cyclictest0-21swapper/323:22:043
179709955,0cyclictest0-21swapper/221:24:572
179709953,1cyclictest6656-21tr20:55:112
179709952,3cyclictest4129-21ssh23:43:102
179709950,5cyclictest24160-1kworker/2:1H22:29:342
179709950,5cyclictest0-21swapper/220:35:112
179709950,5cyclictest0-21swapper/219:15:022
179709950,0cyclictest0-21swapper/200:38:382
179689955,0cyclictest0-21swapper/121:41:011
179689955,0cyclictest0-21swapper/100:34:171
179689950,5cyclictest0-21swapper/123:39:091
179689950,5cyclictest0-21swapper/100:12:191
179629955,0cyclictest0-21swapper/022:10:160
179629951,2cyclictest0-21swapper/019:35:100
179629950,5cyclictest2419-21ssh22:54:560
179629950,5cyclictest0-21swapper/023:20:230
179629950,5cyclictest0-21swapper/023:15:090
179629950,5cyclictest0-21swapper/022:38:280
179629950,4cyclictest21208-21apt-get20:20:010
179629950,4cyclictest20527-21hddtemp_smartct23:35:140
179629950,4cyclictest0-21swapper/020:40:110
179629950,0cyclictest13593-21ssh22:44:270
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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