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2026-06-30 - 23:07

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 Tue Jun 30, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3484033996660,4cyclictest3589501-21kworker/u8:9-nfsiod11:27:502
3484031996146,9cyclictest151ktimers/010:20:350
3484031996141,16cyclictest3604432-40mandb11:27:490
3484032995542,5cyclictest0-21swapper/110:50:371
3484033995042,5cyclictest3553535-21kworker/u8:1-xprtiod11:40:012
3484033994734,10cyclictest3527527-21mailstats09:20:442
3484031994620,19cyclictest12650irq/32-eth009:50:450
3484031994620,19cyclictest12650irq/32-eth009:50:450
3484031994618,11cyclictest3598842-21sh11:19:110
3484031994614,13cyclictest3640359-21ssh12:26:300
3484033994535,6cyclictest3497533-21systemd-run07:55:012
3484032994522,16cyclictest271ktimers/111:20:461
3484032994436,5cyclictest3496038-21systemd-run07:50:011
3484031994427,12cyclictest3501376-21ntpq08:05:330
3484031994418,9cyclictest3528298-21sh09:22:010
3484033994336,4cyclictest3484052-21latency_hist07:10:012
3484033994336,4cyclictest3484052-21latency_hist07:10:012
3484033994333,7cyclictest2679292-21cups-browsed09:05:302
3484031994336,5cyclictest567-21gdbus08:40:430
3484031994331,5cyclictest3554725-21ntpq10:05:310
3484031994328,10cyclictest3498434-21ntpq07:55:350
3484031994319,8cyclictest3577313-21sh10:42:580
3484033994234,5cyclictest3591710-21unixbench_singl11:05:452
3484032994233,6cyclictest487-21rs:main1
348403299423,30cyclictest3612389-21ssh11:40:401
3484031994236,4cyclictest3626770-21aten_r2power_fr12:05:220
3484031994229,10cyclictest3568941-21cron10:30:000
3484031994229,10cyclictest3568941-21cron10:30:000
3484031994226,10cyclictest3615452-21ps11:45:400
3484031994224,6cyclictest3645595-21ntpq12:35:410
3484031994218,7cyclictest3520022-21diskmemload10:02:520
3484031994217,9cyclictest3496611-21if_eth007:50:280
3484033994134,4cyclictest3494519-21cron07:45:012
3484033994130,5cyclictest0-21swapper/207:10:382
3484033994130,5cyclictest0-21swapper/207:10:382
3484033994129,9cyclictest3513332-21needreboot08:45:302
3484032994133,5cyclictest3513049-21fschecks_time08:45:261
3484032994132,4cyclictest0-21swapper/110:45:371
3484032994130,8cyclictest694-21cron07:15:001
3484032994130,8cyclictest694-21cron07:15:001
3484032994127,11cyclictest3540109-21unixbench_multi09:40:471
3484032994127,11cyclictest3540109-21unixbench_multi09:40:471
3484031994129,9cyclictest265-21systemd-journal09:15:010
3484031994127,8cyclictest3504471-21ntpq08:15:380
3484031994126,12cyclictest3516423-21ntpq08:55:400
3484031994125,12cyclictest3530330-21ntpq09:25:370
3484031994122,16cyclictest3519407-21ntpq09:05:370
3484031994118,17cyclictest0-21swapper/009:00:320
3484031994117,9cyclictest3535087-21sh09:34:060
3484031994114,8cyclictest3621295-21ntpq11:55:330
348403399404,28cyclictest958-21sendmail-mta07:45:342
3484033994033,4cyclictest3547641-21ssh09:55:012
3484033994033,4cyclictest3547641-21ssh09:55:012
3484033994024,10cyclictest351ktimers/209:00:362
348403399402,31cyclictest3554824-21ssh10:05:362
3484032994032,5cyclictest3620713-21sh11:55:241
3484032994032,5cyclictest3617376-21latency_hist11:50:021
3484032994032,4cyclictest0-21swapper/112:00:241
3484031994027,8cyclictest3510366-21ntpq08:35:320
3484031994027,8cyclictest3495367-21ntpq07:45:310
3484031994026,9cyclictest3618268-21ntpq11:50:320
3484031994025,12cyclictest3499874-21ntpq08:00:320
3484031994018,17cyclictest0-21swapper/008:10:350
3484031994018,10cyclictest3520022-21diskmemload12:32:390
3484031994016,7cyclictest3520022-21diskmemload12:01:440
3484031994015,9cyclictest3583327-21ssh10:52:540
3484031994015,9cyclictest3569405-21sh10:30:250
3484031994015,17cyclictest0-21swapper/007:20:320
3484031994015,17cyclictest0-21swapper/007:20:320
3484033993931,5cyclictest3579075-21ssh10:45:372
3484033993931,5cyclictest3510954-21unixbench_singl08:35:462
3484033993929,6cyclictest1003-21mta-sts-daemon10:31:282
3484033993929,6cyclictest0-21swapper/212:30:422
3484033993928,7cyclictest3536064-21fschecks_time09:35:272
3484032993931,3cyclictest0-21swapper/110:25:001
3484032993930,6cyclictest3638446-21cron12:25:011
3484032993929,6cyclictest3502032-21systemd-run08:10:011
3484032993929,6cyclictest3496040-21kworker/u8:16+xprtiod09:20:011
3484032993929,4cyclictest0-21swapper/111:05:341
3484032993928,7cyclictest421-21dbus-daemon09:27:541
3484031993929,4cyclictest3507380-21ntpq08:25:310
3484031993926,8cyclictest3514975-21ntpq08:50:380
3484031993926,8cyclictest3513394-21ntpq08:45:320
3484031993926,8cyclictest3508963-21ntpq08:30:350
3484031993924,11cyclictest3489378-21ntpq07:25:320
3484031993919,6cyclictest3608025-21ssh11:34:350
3484031993916,7cyclictest3520022-21diskmemload10:55:080
3484031993915,10cyclictest3543380-21sh09:46:150
3484031993915,10cyclictest3543380-21sh09:46:150
3484033993830,5cyclictest3500468-21sed08:00:452
3484033993829,6cyclictest3526207-21sh09:20:012
3484032993830,5cyclictest3535390-21cron09:35:011
3484032993830,3cyclictest0-21swapper/110:00:011
3484032993826,9cyclictest3496884-21ntp_kernel_pll_07:50:341
3484031993831,4cyclictest3579541-21unixbench-2d10:45:460
3484031993826,8cyclictest3572959-21ntpq10:35:370
3484031993823,12cyclictest3484926-21ntpq07:10:340
3484031993823,12cyclictest3484926-21ntpq07:10:340
3484031993819,15cyclictest3540297-21ssh09:41:090
3484031993819,15cyclictest3540297-21ssh09:41:090
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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