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2026-01-23 - 09:46
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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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Fri Jan 23, 2026 00:45:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
341808599873,65cyclictest3514864-21ssh00:30:011
3418080998638,44cyclictest16850irq/134-800000021:45:020
3418080998423,15cyclictest3462828-21munin-run22:35:000
3418080998028,16cyclictest3451284-21sshd22:09:380
3418080998018,6cyclictest16850irq/134-800000000:32:110
3418085997916,25cyclictest3493453-21sh23:42:321
3418095997828,46cyclictest1-21systemd20:25:023
341808099783,9cyclictest3492152-21tr23:39:590
3418080997818,50cyclictest16850irq/134-800000000:35:590
341808099781,4cyclictest3505740-21munin-run00:10:000
341808099777,10cyclictest121ksoftirqd/022:14:500
3418080997734,26cyclictest16850irq/134-800000022:45:020
341808099772,42cyclictest3449011-21ssh22:04:350
3418080997618,49cyclictest16850irq/134-800000022:51:020
3418080997618,49cyclictest16850irq/134-800000021:16:210
3418080997515,50cyclictest16850irq/134-800000022:15:300
341808099741,17cyclictest3512823-21ssh00:25:210
3418095997346,24cyclictest37-21ksoftirqd/323:10:013
3418080997318,15cyclictest275-21dbus-daemon21:10:000
3418080997315,16cyclictest275-21dbus-daemon20:50:000
341808099721,39cyclictest3434992-21ssh21:33:330
341808099712,6cyclictest3502423-21ssh00:02:240
341808099711,11cyclictest3483523-21ssh23:20:120
341808099711,11cyclictest3483523-21ssh23:20:120
3418080997027,10cyclictest3457635-21rm22:23:230
341808099701,7cyclictest3422683-21/usr/sbin/munin20:40:010
3418090996911,4cyclictest3471581-21ssh22:54:232
3418080996931,33cyclictest3424238-21diskmemload23:10:020
3418080996919,45cyclictest16850irq/134-800000000:16:450
3418080996919,13cyclictest3474583-21ssh23:00:300
341808099691,30cyclictest3498584-21ssh23:54:110
3418095996826,38cyclictest3483298-21latency_hist23:20:013
3418090996823,42cyclictest30-21ksoftirqd/222:30:042
341809099682,14cyclictest3418573-21systemd-run19:20:012
341809099682,14cyclictest3418573-21systemd-run19:20:012
3418090996812,3cyclictest3485857-21ssh23:25:292
3418080996831,34cyclictest16950irq/224-800000022:46:150
3418080996831,34cyclictest16950irq/224-800000022:46:150
341808099681,29cyclictest3433409-21latency_hist21:30:020
3418095996726,36cyclictest3465103-21sendmail22:40:003
341809599672,16cyclictest3421371-21cron20:15:003
3418090996726,38cyclictest30-21ksoftirqd/223:50:032
341808099676,18cyclictest3419558-21cron19:40:000
3418080996735,29cyclictest16950irq/224-800000022:36:360
341808099672,5cyclictest120-21kswapd022:00:010
341808099672,43cyclictest3494816-21ssh23:45:220
341808099672,32cyclictest3474239-21latency_hist23:00:020
3418080996720,3cyclictest0-21swapper/000:14:280
3418095996621,6cyclictest3425004-21sh21:11:163
3418090996610,4cyclictest3484031-21ssh23:21:272
3418090996610,4cyclictest3484031-21ssh23:21:262
341808099667,14cyclictest3418811-21modprobe19:25:000
341808099665,19cyclictest3418547-21modprobe19:20:000
341808099665,19cyclictest3418547-21modprobe19:20:000
341808099662,4cyclictest0-21swapper/023:35:020
3418080996623,11cyclictest3444490-21ssh21:54:340
3418080996614,17cyclictest16850irq/134-800000023:57:290
3418080996613,16cyclictest3442431-21ssh21:50:000
3418080996613,16cyclictest3442431-21ssh21:50:000
3418095996520,39cyclictest0-21swapper/321:30:013
3418090996523,37cyclictest3421115-21sshd20:09:372
3418085996517,16cyclictest3461832-21sh22:32:411
341808099656,16cyclictest3421987-21wc20:25:020
3418090996424,35cyclictest3481549-21sh23:16:002
3418085996420,13cyclictest23-21ksoftirqd/121:48:391
3418085996420,13cyclictest23-21ksoftirqd/121:48:391
341808099644,22cyclictest3467602-21systemd-journal19:35:010
341808099643,6cyclictest3492964-21ssh23:41:240
3418080996423,10cyclictest12-21ksoftirqd/022:29:590
341809599634,16cyclictest3460573-21cut22:29:593
3418095996324,35cyclictest37-21ksoftirqd/321:40:023
341809599632,15cyclictest3453679-21munin-plugin-st22:15:003
341809599632,15cyclictest309-21in:imuxsock19:25:003
3418090996325,34cyclictest30-21ksoftirqd/200:22:442
341809099631,15cyclictest3475052-21sshd23:01:382
341808099639,6cyclictest16850irq/134-800000023:19:040
3418080996321,11cyclictest1-21systemd23:15:020
3418095996224,34cyclictest37-21ksoftirqd/300:34:573
3418095996222,13cyclictest37-21ksoftirqd/323:42:243
3418095996219,10cyclictest3419774-21wc19:40:023
341809099622,15cyclictest3489903-21cron23:35:012
3418090996221,38cyclictest30-21ksoftirqd/222:45:482
3418090996221,38cyclictest30-21ksoftirqd/222:45:482
3418095996128,29cyclictest3434612-21sh21:32:383
341809599612,18cyclictest1-21systemd20:20:013
341809599612,15cyclictest3418551-21cut19:20:003
341809599612,15cyclictest3418551-21cut19:20:003
3418095996121,4cyclictest3508883-21sh00:16:433
341809099619,4cyclictest3420076-21sshd19:47:372
341809099614,7cyclictest131rcu_preempt00:40:032
341809099612,15cyclictest3516886-21ssh00:34:372
341809099612,15cyclictest3443704-21ssh21:52:312
341809099612,14cyclictest48-21kcompactd022:10:072
341809099612,14cyclictest3421925-21munin-run20:25:002
3418090996119,38cyclictest30-21ksoftirqd/222:43:352
341809099611,16cyclictest48-21kcompactd022:55:122
341809099611,15cyclictest3419284-21sshd19:30:372
341809099611,13cyclictest3505994-21sh00:10:092
341808599619,18cyclictest3495800-21ssh23:47:411
3418085996114,14cyclictest3424681-21ssh21:10:301
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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