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2026-03-29 - 23:35

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 Sun Mar 29, 2026 12:44:15)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3370155996642,20cyclictest3556366-21latency_hist10:15:010
3370155995332,18cyclictest3402069-21/usr/sbin/munin07:41:390
35166732510,3chrt75-21kworker/3:1+events09:36:263
3370161994838,8cyclictest280-21systemd-journal11:20:012
3370157994839,6cyclictest3391800-21latency_hist07:30:011
3370155994739,5cyclictest3586092-21latency_hist10:45:010
3370155994725,6cyclictest280-21systemd-journal07:29:480
3370155994625,6cyclictest280-21systemd-journal09:35:480
3370161994437,5cyclictest280-21systemd-journal11:46:472
3370155994437,5cyclictest3685130-21apt-get12:25:010
3370155994427,4cyclictest3416891-21apt-get07:56:230
337015599431,40cyclictest3461518-21unin-run08:40:010
35904322420,2sleep239-21ksoftirqd/210:46:442
3370157994031,6cyclictest3531435-21latency_hist09:50:011
3370157994031,6cyclictest3481690-21latency_hist09:00:011
3370157994010,17cyclictest3481947-21taskset09:00:151
3370155993925,10cyclictest3476520-21apt-get08:55:000
337015799387,18cyclictest3397379-21/usr/sbin/munin07:36:281
3370157993829,6cyclictest280-21systemd-journal09:29:481
3370155993829,6cyclictest3700101-21grep12:36:450
3370157993728,6cyclictest3471581-21latency_hist08:50:011
3370155993726,8cyclictest3445531-21ntpq08:21:370
337015799367,18cyclictest3460638-21ld08:36:391
337015799367,17cyclictest3575437-21ntp_states10:31:391
337015799367,17cyclictest3446881-21grep08:26:271
337015799366,16cyclictest280-21systemd-journal09:05:481
3370157993610,15cyclictest3595727-21taskset10:52:111
3370157993610,15cyclictest3595727-21taskset10:52:111
3370155993626,7cyclictest280-21systemd-journal12:10:480
337015599360,33cyclictest3605864-21true11:05:000
337015799358,16cyclictest3425578-21ntpq08:01:371
3370155993512,20cyclictest3571273-21kworker/0:0+events10:36:370
337015799349,12cyclictest3664583-21ntpq12:01:401
337015799349,12cyclictest3610017-21ntpq11:06:401
337015799348,12cyclictest3511725-21apt-get09:31:261
337015799348,12cyclictest3455700-21ntpq08:31:401
337015799347,15cyclictest3585229-21ntpq10:41:371
337015799346,15cyclictest3695819-21apt-get12:36:251
337015799346,15cyclictest3495973-21python309:11:441
3370157993430,3cyclictest3660450-21systemd-run12:00:001
3370157993427,5cyclictest3630574-21latency_hist11:30:011
3370157993425,6cyclictest3441440-21latency_hist08:20:011
3370157993424,7cyclictest280-21systemd-journal11:21:471
337015799339,12cyclictest3644577-21ntpq11:41:381
337015799339,12cyclictest3520466-21ntpq09:36:391
337015799338,13cyclictest3690318-21apt-get12:30:031
337015799338,12cyclictest3649515-21ntpq11:46:391
337015799338,12cyclictest3375291-21ntpq07:15:021
337015799337,14cyclictest3416556-21sh07:55:001
337015799337,14cyclictest3416556-21sh07:55:001
337015799337,12cyclictest3670653-21apt-get12:11:261
337015799337,12cyclictest3665717-21apt-get12:06:251
337015799337,11cyclictest3570497-21ntpq10:26:401
337015799336,9cyclictest3639712-21ntpq11:36:421
337015799336,17cyclictest3619917-21ntp_states11:16:401
337015799336,17cyclictest3545394-21awk10:01:351
337015799336,16cyclictest3532039-21diskstats09:51:281
337015799336,16cyclictest3466501-21runrttasks08:43:141
337015799336,12cyclictest3615000-21ld11:11:411
337015799335,19cyclictest885-21mta-sts-daemon10:18:491
3370157993316,6cyclictest3555466-21needreboot10:11:371
3370157993310,8cyclictest421rcuog/210:06:251
3370157993310,11cyclictest3525680-21ntpq09:41:401
337015599335,21cyclictest3381944-21kworker/0:0+events07:25:000
3370155993327,4cyclictest3501133-21unixbench_multi09:16:450
337015599332,29cyclictest3536391-21kworker/0:2+events10:21:330
3370161993222,8cyclictest280-21systemd-journal08:20:002
337015799328,14cyclictest0-21swapper/108:21:241
337015799328,12cyclictest3634713-21ntpq11:31:391
337015799328,12cyclictest3565539-21ntpq10:21:401
337015799327,8cyclictest3685457-21dpkg12:25:011
337015799327,15cyclictest3505616-21ntpq09:21:371
337015799327,14cyclictest3600071-21ntpq10:56:391
337015799327,14cyclictest3600071-21ntpq10:56:391
337015799327,12cyclictest3590219-21ntpq10:46:401
337015799327,12cyclictest3580309-21ntpq10:36:381
337015799327,12cyclictest3540478-21ntpq09:56:381
337015799327,12cyclictest3386034-21ntpq07:21:381
337015799326,9cyclictest3405814-21ntpq07:41:391
337015799326,14cyclictest0-21swapper/108:51:251
337015799325,15cyclictest3431697-21apt-get08:11:281
3370157993225,5cyclictest3496900-21apt-get09:16:251
337015599328,22cyclictest3501521-21kworker/0:1+events09:26:260
3370161993122,7cyclictest3521379-21cp09:40:002
337015799319,11cyclictest3690123-21taskset12:27:421
337015799318,11cyclictest3654666-21ntpq11:51:381
337015799317,12cyclictest3396012-21ntpq07:31:381
337015799316,7cyclictest3374170-21ntpq07:11:381
337015799316,14cyclictest3430489-21ntpq08:06:381
337015799316,13cyclictest3679359-21ntpq12:16:381
337015799315,10cyclictest3420453-21cat07:56:341
3370157993121,8cyclictest280-21systemd-journal11:05:001
337015599313,26cyclictest3610816-21kworker/0:2+events11:18:370
3370155993126,3cyclictest3557643-21kthreadcore10:16:330
3370155993122,7cyclictest3609925-21ntpq11:06:370
337015599311,28cyclictest3381944-21kworker/0:0+events07:31:360
337015799306,12cyclictest3410811-21ntpq07:46:381
337015799306,12cyclictest3410811-21ntpq07:46:381
3370157993022,5cyclictest3369993-21latency_hist07:10:011
3370155993025,3cyclictest3615732-21cron11:15:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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