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2025-12-09 - 21:06
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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 rackdslot2.osadl.org (updated Tue Dec 09, 2025 12:45:43)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
136691230202,19phc2sys0-21swapper/307:08:583
217442208173,23sleep20-21swapper/207:09:482
216442205170,24sleep00-21swapper/007:08:380
214132205171,23sleep10-21swapper/107:05:371
1795021430,6sleep32211099cyclictest08:05:253
2176128763,16sleep20-21swapper/207:10:012
1366918663,15phc2sys0-21swapper/307:10:003
2210799608,16cyclictest19996-21mailstats10:25:260
2210799587,14cyclictest0-21swapper/009:50:120
22107995811,17cyclictest14011-21/usr/sbin/munin12:30:250
22107995810,18cyclictest13864-21/usr/sbin/munin10:15:230
22107995711,12cyclictest16600-21awk09:10:260
133391570,6getstats2211099cyclictest09:35:323
2210799569,9cyclictest2259-21gnome-shell12:25:250
22107995611,12cyclictest11875-21wc09:00:250
2210799559,7cyclictest6002-21ps11:05:190
22107995412,17cyclictest24836-21df_abs07:15:140
32752530,4sleep22210999cyclictest12:05:212
2210799539,15cyclictest8018-21df_abs11:10:140
2210799539,10cyclictest10202-21sed07:50:180
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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