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2026-05-25 - 00:54
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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 rackeslot2.osadl.org (updated Sun May 24, 2026 12:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3581626993121,5cyclictest4040481-21latency_hist12:30:020
3581638992825,1cyclictest0-21swapper/212:15:002
3581626992817,5cyclictest0-21swapper/011:25:000
3581626992514,6cyclictest3791341-21/usr/sbin/munin09:49:590
3581638992421,1cyclictest0-21swapper/207:50:022
3581638992420,2cyclictest0-21swapper/212:35:022
3581626992421,2cyclictest3969398-21cat11:45:010
3581626992421,2cyclictest3591767-21kthreadcore07:20:000
3581626992415,4cyclictest0-21swapper/009:10:020
3581626992412,7cyclictest3778454-21kthreadcore09:40:020
3581629992320,2cyclictest3754749-21/usr/sbin/munin09:25:021
3581629992320,2cyclictest3692766-21grep08:40:001
3581629992319,3cyclictest3827634-1atopacctd11:15:011
3581629992317,1cyclictest134050irq/121-eno107:29:551
3581629992317,1cyclictest134050irq/121-eno107:29:551
3581629992313,3cyclictest0-21swapper/110:10:011
3581626992320,2cyclictest3992829-21munin-run12:00:020
3581626992320,2cyclictest3946556-21systemctl11:30:010
3581626992320,2cyclictest3872156-21kthreadcore10:40:030
3581626992320,2cyclictest3606113-21systemd-run07:30:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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