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2026-04-23 - 18:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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 here to display the system's profile data or here to proceed to next system.
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.
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 100 highest latencies:
System rack2slot7s.osadl.org (updated Thu Apr 23, 2026 12:43:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3441326996338,21cyclictest439-21systemd-logind11:30:022
3441326996026,8cyclictest3524016-21basename10:10:012
3441325995641,5cyclictest0-21swapper/112:25:431
3441324995441,7cyclictest0-21swapper/007:10:400
3441324994936,6cyclictest0-21swapper/009:54:430
3441324994837,9cyclictest695-21cron12:20:010
3441326994739,5cyclictest3531564-21munin-plugin-st10:20:012
3441326994737,6cyclictest3626212-21unin-run12:25:012
3441326994631,12cyclictest3517868-21mailstats10:00:482
3441325994636,6cyclictest3631988-21unixbench_multi12:31:021
3441325994636,6cyclictest3631988-21unixbench_multi12:31:021
3441324994628,15cyclictest3448920-21latency_hist07:35:020
3441325994535,4cyclictest0-21swapper/110:40:391
3441325994535,4cyclictest0-21swapper/110:40:391
344132499451,37cyclictest3521392-21ssh10:05:400
3441326994436,5cyclictest439-21systemd-logind12:00:012
3441325994434,6cyclictest3459332-21systemd-run08:10:011
3441324994438,4cyclictest3501400-21grep09:40:010
3441324994438,4cyclictest3501400-21grep09:40:010
3441324994428,13cyclictest0-21swapper/010:20:010
3441326994333,6cyclictest3603404-21cron11:55:012
3441326994333,6cyclictest3603404-21cron11:55:012
3441325994335,5cyclictest3441335-21systemd-run07:10:011
3441325994334,6cyclictest3588274-21unin-run11:35:011
3441324994323,12cyclictest151ktimers/011:45:450
3441325994234,4cyclictest0-21swapper/110:10:461
344132499424,28cyclictest3600851-21ssh11:50:420
344132499424,28cyclictest3600851-21ssh11:50:420
3441326994132,6cyclictest3481402-21systemd-run09:15:022
3441326994132,6cyclictest3481402-21systemd-run09:15:022
3441326994129,8cyclictest420-21avahi-daemon12:30:522
3441326994129,8cyclictest420-21avahi-daemon12:30:522
3441325994133,5cyclictest3494053-21aten_r2power_vo09:30:321
3441325994132,6cyclictest3530030-21kworker/u8:3+xprtiod10:25:011
3441325994126,6cyclictest3511693-21sh09:53:021
3441324994134,4cyclictest3477837-21aten_r2power_en09:10:280
3441324994134,4cyclictest3477837-21aten_r2power_en09:10:280
3441324994134,3cyclictest0-21swapper/011:05:000
3441324994127,8cyclictest0-21swapper/009:25:440
3441326994034,3cyclictest0-21swapper/209:35:482
3441326994034,3cyclictest0-21swapper/209:35:482
3441326994032,5cyclictest3565556-21munin-plugin-st11:05:002
3441326994032,5cyclictest3561806-21systemd-run11:00:012
3441325994033,4cyclictest0-21swapper/112:00:001
3441325994033,3cyclictest0-21swapper/107:35:011
344132499403,30cyclictest3555412-21ssh10:50:410
344132499403,30cyclictest3555412-21ssh10:50:410
3441324994027,6cyclictest12350irq/32-eth008:40:440
3441324994026,9cyclictest12350irq/32-eth010:45:440
3441324994026,9cyclictest12350irq/32-eth010:45:440
3441326993929,7cyclictest421-21dbus-daemon10:20:492
344132699392,31cyclictest3597089-21ssh11:45:432
3441324993931,4cyclictest0-21swapper/011:55:390
3441324993926,10cyclictest0-21swapper/010:55:480
344132499392,30cyclictest3589456-21ssh11:35:420
344132699386,22cyclictest428-21mta-sts-daemon10:35:442
344132699386,22cyclictest428-21mta-sts-daemon10:35:442
344132699384,30cyclictest3513861-21sshd09:55:432
3441326993830,5cyclictest3628050-21unixbench_singl12:25:542
3441326993830,5cyclictest0-21swapper/207:40:012
3441326993829,6cyclictest421-21dbus-daemon10:30:012
3441326993829,6cyclictest3592098-21systemd-run11:40:022
3441326993829,5cyclictest3614792-21systemd-run12:10:012
3441326993823,8cyclictest3477308-21diskmemload10:50:442
3441326993823,8cyclictest3477308-21diskmemload10:50:442
3441325993832,3cyclictest0-21swapper/112:15:011
3441325993831,4cyclictest0-21swapper/112:15:431
3441325993830,5cyclictest3637962-21cron12:40:011
3441325993830,5cyclictest3554241-21systemd-run10:50:011
3441325993830,5cyclictest3554241-21systemd-run10:50:011
3441325993829,6cyclictest3542922-21idleruntime-cro10:35:001
3441325993829,6cyclictest3542922-21idleruntime-cro10:35:001
3441325993827,7cyclictest420-21avahi-daemon11:35:161
3441325993826,9cyclictest3477308-21diskmemload11:05:011
3441325993825,8cyclictest0-21swapper/111:55:011
3441325993825,8cyclictest0-21swapper/111:55:011
344132499383,28cyclictest3612315-21ssh12:05:460
3441324993829,7cyclictest3474310-21sendmail09:00:000
344132499380,17cyclictest3495860-21ssh09:32:000
3441326993729,5cyclictest3608977-21unixbench_multi12:00:522
3441326993728,6cyclictest421-21dbus-daemon09:30:052
344132699372,26cyclictest3482699-21ssh09:15:482
3441325993728,6cyclictest1056-21mta-sts-daemon10:55:461
3441325993728,5cyclictest0-21swapper/109:25:421
344132599372,15cyclictest3578041-21ssh11:20:401
3441324993725,7cyclictest0-21swapper/010:00:460
344132499371,27cyclictest3570563-21ssh11:10:420
3441326993628,5cyclictest3473316-21fschecks_count08:55:332
3441326993628,5cyclictest0-21swapper/207:20:012
3441326993628,4cyclictest0-21swapper/210:45:502
3441326993628,4cyclictest0-21swapper/210:45:502
3441326993627,6cyclictest420-21avahi-daemon10:10:412
3441326993623,6cyclictest0-21swapper/211:30:392
3441325993629,4cyclictest3573161-21latency_hist11:15:021
3441325993628,5cyclictest3520207-21cron10:05:011
3441325993627,4cyclictest0-21swapper/107:25:431
3441325993625,8cyclictest3450339-21systemd-run07:40:011
3441325993624,9cyclictest3608130-21kernelversion12:00:351
3441325993623,9cyclictest3536248-21/usr/sbin/munin10:25:361
3441325993622,10cyclictest3543687-21sh10:35:331
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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