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2025-10-20 - 13:27
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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 50 highest latencies:
System rackeslot2.osadl.org (updated Mon Oct 20, 2025 00:43:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
313870521140,2sleep30-21swapper/300:16:173
298662021120,1sleep00-21swapper/022:48:410
296998021020,2sleep12969969-21perf22:40:001
30679152310,2sleep20-21swapper/223:36:122
2663680992816,5cyclictest2832920-21kthreadcore21:21:180
2663681992721,2cyclictest170550irq/121-eno122:55:021
2663680992320,2cyclictest1-21systemd19:50:020
2663680992313,6cyclictest3134570-21runrttasks00:11:370
266368299221,4cyclictest0-21swapper/221:40:012
2663681992219,2cyclictest3171628-21cron00:35:001
2663680992214,7cyclictest0-21swapper/023:15:010
2663682992118,1cyclictest0-21swapper/221:20:012
2663681992118,2cyclictest2663678-21cyclictest22:35:021
2663681992116,4cyclictest2751176-21cut20:20:001
2663680992118,2cyclictest1635-21dbus-daemon22:25:000
2663680992117,3cyclictest1635-21dbus-daemon22:55:020
2663680992116,3cyclictest260-21systemd-journal23:00:000
2663680992112,5cyclictest3032528-21acpi23:16:120
2663680992111,6cyclictest0-21swapper/022:00:030
2663682992018,1cyclictest0-21swapper/200:40:022
2663682992017,1cyclictest0-21swapper/223:55:002
2663681992017,2cyclictest3162957-21latency_hist00:30:021
2663681992012,3cyclictest2891533-21runrttasks21:56:051
2663681992011,4cyclictest0-21swapper/121:36:191
2663680992017,2cyclictest3092755-21apt-config23:50:000
2663680992013,6cyclictest2886118-21kthreadcore21:51:180
2663680992012,4cyclictest3019456-21latency23:06:190
2564091200,2phc2sys0-21swapper/322:21:243
2663682991916,1cyclictest0-21swapper/222:35:012
266368199198,5cyclictest3072216-21latency23:36:191
2663681991916,2cyclictest2769550-21grep20:35:011
2663681991915,3cyclictest2690262-21munin-plugin-st19:30:011
266368099197,7cyclictest0-21swapper/023:51:420
2663680991916,2cyclictest2669974-21grep19:15:020
2564091191,2phc2sys0-21swapper/321:26:183
2663682991816,1cyclictest0-21swapper/222:25:022
2663682991815,1cyclictest0-21swapper/223:56:182
2663682991815,1cyclictest0-21swapper/222:20:012
2663682991815,1cyclictest0-21swapper/222:20:012
2663682991815,1cyclictest0-21swapper/219:55:012
266368199189,4cyclictest0-21swapper/100:05:011
2663681991815,2cyclictest2872947-21munin-plugin-st21:45:001
2663681991815,2cyclictest2714588-21latency_hist19:50:011
2663681991815,2cyclictest2663678-21cyclictest21:00:021
2663681991814,3cyclictest3148864-21kthreadcore00:21:191
266368099189,5cyclictest3173901-21irqrtprio00:36:190
266368099187,6cyclictest0-21swapper/022:36:110
2663680991815,2cyclictest2690075-21gpgv19:30:000
2663680991815,2cyclictest1803-21gdbus20:25:020
2663680991813,1cyclictest0-21swapper/000:30:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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