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2026-05-21 - 03:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, slot #4

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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  Intel
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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Thu May 21, 2026 00:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
345230123440,3sleep375-21kworker/3:1-events00:31:063
312628499192176,14cyclictest0-21swapper/021:10:000
315124021820,5sleep3451irq_work/319:30:543
312628999130126,2cyclictest3247639-21gpgv21:10:012
3126287999996,1cyclictest0-21swapper/121:10:011
32882202770,3sleep00-21swapper/021:50:520
3126287996044,13cyclictest3286958-21latency_hist21:50:001
3126287996044,13cyclictest3286958-21latency_hist21:49:591
3126284995948,7cyclictest3301997-21apt-get22:05:010
3126287995134,13cyclictest1704890-21systemd-journal21:06:431
3126284995044,4cyclictest2221485-21kworker/u8:0+events_unbound20:35:580
3126289994940,7cyclictest3286954-21apt-get21:50:002
3126289994940,7cyclictest3286954-21apt-get21:50:002
32779892480,3chrt481ktimers/321:40:563
3126287994840,6cyclictest3402848-21apt-get23:45:451
3126287994832,14cyclictest3187963-21/usr/sbin/munin20:11:001
3126284994838,7cyclictest1704890-21systemd-journal23:00:000
3126284994837,8cyclictest3246351-21ntpq21:06:010
3126289994739,5cyclictest3227609-21cp20:50:002
3126284994738,6cyclictest3406590-21ntpq23:45:560
3126284994641,4cyclictest3072456-21kworker/u8:1+flush-8:019:55:480
3126284994639,5cyclictest3192614-21latency_hist20:15:000
3126287994538,5cyclictest3447944-21apt-get00:30:451
3126287994525,17cyclictest3296192-21ntpq21:55:581
3126284994536,7cyclictest3276171-21ntpq21:36:030
3126284994536,6cyclictest3272115-21latency_hist21:35:010
3126284994535,8cyclictest3396777-21ntpq23:36:000
3126287994427,14cyclictest3186557-21ntpq20:05:591
3126284994439,4cyclictest3182183-21kworker/u8:2+flush-8:020:46:070
3126289994330,10cyclictest3392842-21cp23:35:012
3126287994335,6cyclictest3327504-21apt-get22:30:471
3126287994334,6cyclictest1704890-21systemd-journal23:08:431
3126287994332,8cyclictest1704890-21systemd-journal20:25:431
3126287994332,8cyclictest1704890-21systemd-journal20:25:421
3126287994327,14cyclictest3298079-21irqrtprio22:00:521
3126284994334,7cyclictest3316179-21ntpq22:15:590
3126287994233,6cyclictest3417451-21cp00:00:001
3126284994232,7cyclictest3427431-21latency_hist00:10:010
3126284994232,7cyclictest3167670-21latency_hist19:50:010
3126284994232,7cyclictest3072456-21kworker/u8:1+flush-8:019:35:570
3126284994231,8cyclictest3377911-21diskstats23:20:520
3126287994124,15cyclictest0-21swapper/100:15:011
3126284994135,4cyclictest2221485-21kworker/u8:0+flush-8:020:40:490
3126289994030,7cyclictest1704890-21systemd-journal22:00:012
3126284994035,3cyclictest3307366-21kworker/u8:2+flush-8:023:26:030
3126284994032,6cyclictest3307366-21kworker/u8:2+events_unbound00:35:560
3126284994032,6cyclictest3307366-21kworker/u8:2+events_unbound00:35:550
3126284994031,7cyclictest1704890-21systemd-journal22:20:010
33251492390,6sleep3451irq_work/322:25:543
3126287993921,3cyclictest3142283-21mailstats19:21:031
3126284993930,7cyclictest3432344-21latency_hist00:15:010
3126287993820,3cyclictest0-21swapper/100:20:001
3126284993833,4cyclictest3407517-21kworker/u8:1+events_unbound00:20:020
3126284993832,5cyclictest3072456-21kworker/u8:1+events_unbound21:21:060
312600823827,6sleep10-21swapper/119:09:031
312600823827,6sleep10-21swapper/119:09:031
3126289993726,9cyclictest1704890-21systemd-journal00:06:432
3126287993729,6cyclictest3382804-21apt-get23:25:451
3126287993728,6cyclictest3242252-21latency_hist21:05:011
3126284993733,3cyclictest3272135-21kworker/u8:3+events_unbound22:00:010
3126284993728,6cyclictest3412434-21latency_hist23:55:010
3126284993727,7cyclictest3182491-21latency_hist20:05:010
3126287993615,3cyclictest0-21swapper/122:20:521
3126284993630,4cyclictest2221485-21kworker/u8:0+events_unbound22:41:040
3126284993629,6cyclictest3307366-21kworker/u8:2+events_unbound00:26:020
3126289993524,9cyclictest1704890-21systemd-journal21:17:422
3126287993525,7cyclictest3196645-21ntpq20:15:571
3126284993530,4cyclictest3182183-21kworker/u8:2+flush-8:020:20:500
3126284993530,3cyclictest3331191-21needreboot22:30:580
3126284993529,4cyclictest3151956-21ntpq19:30:590
3126284993525,8cyclictest3256381-21ntpq21:15:590
3126287993427,5cyclictest3337101-21http22:40:011
3126287993418,2cyclictest3362083-21systemd-run23:05:001
3126284993429,4cyclictest3072456-21kworker/u8:1+flush-8:020:31:020
3126284993428,4cyclictest3407517-21kworker/u8:1+flush-8:023:55:580
3126284993428,4cyclictest3282029-21latency_hist21:45:010
3126284993427,5cyclictest3367192-21cron23:10:000
3126287993324,6cyclictest1704890-21systemd-journal20:51:431
3126284993326,5cyclictest2221485-21kworker/u8:0+flush-8:020:16:040
3126287993225,5cyclictest3392111-21journal-offline23:31:331
3126287993225,5cyclictest3272421-21apt-get21:35:441
3126287993222,8cyclictest3137123-21ntpq19:15:541
3126287993215,7cyclictest3367742-21apt-get23:10:451
3126284993227,3cyclictest3418027-21cpuspeed_turbos00:00:490
3126284993226,5cyclictest3182183-21kworker/u8:2+flush-8:020:55:580
3126284993225,5cyclictest3142941-21cron19:25:010
3126284993225,5cyclictest2221485-21kworker/u8:0+flush-8:022:36:050
3126289993126,3cyclictest3148308-21aten2_r5power_v19:30:472
3126289993122,7cyclictest2221485-21kworker/u8:0+flush-8:020:16:022
3126287993125,4cyclictest3267462-21apt-get21:30:431
3126287993122,6cyclictest3347192-21latency_hist22:50:001
3126284993127,3cyclictest3126158-21kworker/u8:2+events_unbound19:26:050
3126284993126,3cyclictest3131299-21systemctl19:15:010
3126284993125,5cyclictest3072456-21kworker/u8:1+flush-8:020:06:060
3126284993123,6cyclictest3383177-21kworker/u8:0+events_unbound23:40:590
3126284993120,8cyclictest3287055-21cp21:50:000
3126284993120,8cyclictest3287055-21cp21:50:000
3126287993026,3cyclictest3126158-21kworker/u8:2+flush-8:019:30:141
3126287993024,4cyclictest3224719-21grep20:46:021
3126289992919,8cyclictest3362469-21cp23:05:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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