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2025-11-19 - 17:28

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

Rack #0/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #1/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #2/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #3/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #4/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #5/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #6/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #7/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #8/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #9/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #a/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #b/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #c/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #d/#0 #1 #2 #3 #4 #5 #6 #7 #8 -
Rack #e/#0 #1 #2 #3 #4 #5 #6 #7 #8 - Rack #f/#0 #1 #2 #3 #4 #5 #6 #7 #8 
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Click on a legend element to toggle display of that core, ctrl-click inverts display, shift-click enables all.

Data to construct the above plot have been generated using the RT test utility cyclictest.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Wed Nov 19, 2025 12:45:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3454002997718,15cyclictest0-21swapper/109:50:001
3454006997318,11cyclictest30-21ksoftirqd/209:40:002
3454002997021,16cyclictest3458935-21sed08:45:011
3454002997015,16cyclictest3462797-21modprobe10:00:011
3454002996924,16cyclictest3459435-21date08:55:021
3454002996916,14cyclictest3467430-21cut11:25:021
3453997996763,2cyclictest0-21swapper/007:10:020
3454002996619,14cyclictest3464860-21/usr/sbin/munin10:40:011
3454002996618,17cyclictest3471169-21systemd-run12:40:011
3454011996421,5cyclictest306-21in:imuxsock07:35:003
3454002996417,15cyclictest3458461-21cat08:35:021
3454002996417,15cyclictest3456303-21latency_hist07:55:021
3454011996323,9cyclictest37-21ksoftirqd/309:55:003
3454011996322,10cyclictest37-21ksoftirqd/307:15:003
3454011996320,10cyclictest37-21ksoftirqd/311:55:013
3454011996316,15cyclictest272-21dbus-daemon11:05:003
3454011996226,5cyclictest3456198-21latency_hist07:50:033
3454002996124,8cyclictest3462026-21munin-run09:45:011
3454002996121,13cyclictest3464488-21ls10:30:021
3454002996121,13cyclictest3464488-21ls10:30:021
3454002996019,15cyclictest3455939-21sed07:45:011
3453997995941,14cyclictest235-21systemd-journal07:40:010
3454011995827,5cyclictest3465633-21munin-plugin-st10:55:003
3454011995826,10cyclictest37-21ksoftirqd/312:25:013
3454011995826,10cyclictest37-21ksoftirqd/312:25:013
345400299583,9cyclictest131rcu_preempt11:00:021
345400299583,9cyclictest131rcu_preempt11:00:021
3454002995838,14cyclictest3466179-21munin-run11:05:011
345399799582,9cyclictest131rcu_preempt10:10:020
3454011995724,8cyclictest272-21dbus-daemon11:06:353
345400699578,13cyclictest30-21ksoftirqd/209:10:032
3454011995618,12cyclictest272-21dbus-daemon09:05:013
3454011995616,21cyclictest37-21ksoftirqd/311:15:023
3454011995616,21cyclictest37-21ksoftirqd/311:15:023
3454006995638,16cyclictest30-21ksoftirqd/210:30:032
3454006995637,14cyclictest235-21systemd-journal10:45:002
3454006995637,14cyclictest235-21systemd-journal10:45:002
3454002995635,17cyclictest363-21snmpd07:58:041
3454011995521,7cyclictest3469504-21cat12:05:023
3454006995510,36cyclictest3461195-21kworker/u8:009:50:012
3454002995542,10cyclictest3468294-21munin-run11:45:001
345400699547,8cyclictest30-21ksoftirqd/210:15:012
3454006995420,9cyclictest30-21ksoftirqd/210:00:012
3454002995438,11cyclictest3464598-21munin-run10:35:001
3453997995433,15cyclictest272-21dbus-daemon12:35:000
345400699536,4cyclictest131rcu_preempt09:45:002
3454006995338,11cyclictest30-21ksoftirqd/209:00:012
345400699531,6cyclictest0-21swapper/212:25:022
345400699531,6cyclictest0-21swapper/212:25:022
3454002995346,4cyclictest3469831-21munin-run12:15:011
3454002995339,10cyclictest3461492-21munin-run09:35:021
3454002995338,11cyclictest3464077-21sshd10:24:351
3454002995338,11cyclictest3463314-21munin-run10:10:011
3454002995337,11cyclictest363-21snmpd11:54:261
3454002995337,11cyclictest3468058-21munin-run11:40:011
3454002995337,10cyclictest3465355-21sshd10:47:351
3454011995231,14cyclictest1-21systemd09:35:013
3454011995220,10cyclictest37-21ksoftirqd/309:20:013
3454011995220,10cyclictest37-21ksoftirqd/309:20:003
3454006995236,12cyclictest1-21systemd10:20:012
3454002995237,11cyclictest3465599-21sshd10:50:351
3454002995236,10cyclictest3454988-21munin-run07:30:001
3454011995133,13cyclictest3454440-21cron07:20:003
345401199512,43cyclictest1-21systemd12:10:013
345400699517,5cyclictest131rcu_preempt07:45:012
3454006995136,11cyclictest1-21systemd12:40:012
3454002995138,10cyclictest3470070-21sshd12:18:351
3454002995138,10cyclictest3469013-21sshd11:55:351
3454002995135,11cyclictest3468559-21munin-run11:50:011
3454002995131,15cyclictest363-21snmpd12:26:011
3454002995131,15cyclictest363-21snmpd12:26:011
3453997995111,9cyclictest3463322-21latency_hist10:10:010
3454011995031,14cyclictest235-21systemd-journal10:10:003
345400699502,7cyclictest30-21ksoftirqd/212:10:022
3454002995038,9cyclictest3461744-21munin-run09:40:001
3454002995037,9cyclictest3456035-21munin-run07:50:021
3454002995036,11cyclictest3466383-21sshd11:05:351
3454002995036,11cyclictest3463776-21cron10:17:001
3454002995036,10cyclictest3458648-21munin-run08:40:021
3454002995032,13cyclictest363-21snmpd12:04:241
3454002995030,16cyclictest363-21snmpd11:31:261
3454002995027,17cyclictest3466707-21cron11:15:001
3454002995027,17cyclictest3466707-21cron11:15:001
345400699499,6cyclictest131rcu_preempt11:00:012
345400699499,6cyclictest131rcu_preempt11:00:012
3454006994940,7cyclictest30-21ksoftirqd/209:50:022
3454002994937,9cyclictest3460420-21sshd09:14:351
3454002994936,10cyclictest3454713-21sshd07:24:051
3454002994935,10cyclictest3467513-21munin-run11:30:011
3454002994935,10cyclictest3467513-21munin-run11:30:011
3454002994932,14cyclictest363-21snmpd09:26:461
3454002994929,16cyclictest363-21snmpd08:11:251
3454002994928,15cyclictest3454182-21cron07:15:001
3454002994917,27cyclictest3461037-21grep09:25:021
345399799498,32cyclictest3454000-21grep07:10:000
3453997994942,4cyclictest16950irq/224-800000008:20:020
345401199485,6cyclictest37-21ksoftirqd/310:45:003
345401199485,6cyclictest37-21ksoftirqd/310:45:003
345400699487,10cyclictest30-21ksoftirqd/211:20:002
345400699486,8cyclictest30-21ksoftirqd/211:25:022
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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