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2026-03-30 - 22:59
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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 rack1slot8.osadl.org (updated Mon Mar 30, 2026 12:43:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1742799806722,73cyclictest0-21swapper/007:35:200
1742899800738,45cyclictest0-21swapper/107:10:041
1742799797737,50cyclictest0-21swapper/007:10:040
1742899789699,74cyclictest27250-21strings07:35:201
171782610587,16sleep00-21swapper/007:07:500
170322398379,12sleep10-21swapper/107:06:261
228699850,4rtkit-daemon2285-21rtkit-daemon11:49:091
17427997130,35cyclictest14429-21ssh10:40:120
17427996936,26cyclictest0-21swapper/012:33:010
244882680,5sleep124487-21expr11:55:261
17427996832,12cyclictest11867-21df_inode10:35:160
17427996824,38cyclictest22842-21unixbench_singl09:55:280
17427996734,9cyclictest8104-21df_inode09:30:140
17427996733,29cyclictest4936-21ssh11:20:200
17427996730,10cyclictest14263-21ssh12:35:230
17427996727,33cyclictest310-21munin-node10:15:290
17427996646,15cyclictest0-21swapper/011:55:300
17427996644,17cyclictest0-21swapper/008:20:170
17427996640,17cyclictest0-21swapper/010:20:170
17427996631,11cyclictest3157-21munin-run08:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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