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2026-07-15 - 01:33

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 Tue Jul 14, 2026 12:44:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40081152650,2sleep3471rcuc/311:12:353
3764178996346,13cyclictest3769072-21latency_hist07:15:011
40057482600,4chrt0-21swapper/011:12:320
3764178995938,12cyclictest3865446-21latency_hist08:50:001
3764178995135,14cyclictest3969253-21ntpq10:32:381
3764175994840,5cyclictest3935170-21latency_hist10:00:020
3764175994839,7cyclictest3920103-21latency_hist09:45:010
3764175994637,7cyclictest281-21systemd-journal09:30:010
3764175994338,4cyclictest3899880-21kworker/u8:1+flush-8:009:52:410
3764185994235,5cyclictest281-21systemd-journal08:40:002
3764185994234,6cyclictest4059524-21gpgv12:05:012
3764178994230,10cyclictest384-21dbus-daemon12:00:011
3764175994235,6cyclictest3850405-21kworker/u8:1+flush-8:008:52:300
3764175994233,7cyclictest3985611-21diskstats10:52:280
376417899411,24cyclictest585-21runrttasks11:17:441
376417599410,39cyclictest4074577-21munin-run12:20:000
3764178994029,8cyclictest281-21systemd-journal09:57:381
3764178994021,15cyclictest281-21systemd-journal12:05:381
3764175994036,3cyclictest3850405-21kworker/u8:1+flush-8:009:07:300
3764175994032,6cyclictest3775983-21latency_hist07:20:010
3764175993933,5cyclictest3796295-21kworker/u8:2+flush-8:007:57:440
37599472390,28sleep3451irq_work/307:07:293
3764178993832,4cyclictest3791589-21grep07:37:271
3764178993830,6cyclictest281-21systemd-journal09:12:381
3764175993834,3cyclictest4084854-21kworker/u8:3+flush-8:012:37:440
376417899373,30cyclictest0-21swapper/107:27:271
376417899371,8cyclictest585-21runrttasks11:37:381
376417899364,18cyclictest0-21swapper/110:52:291
3764178993631,4cyclictest3899880-21kworker/u8:1+flush-8:010:22:441
3764178993624,10cyclictest3841212-21cut08:27:281
3764178993619,15cyclictest4085247-21/usr/sbin/munin12:32:381
3764178993619,15cyclictest4085247-21/usr/sbin/munin12:32:381
3764178993613,19cyclictest3904998-21latency_hist09:30:011
3764175993631,4cyclictest4059878-21kworker/u8:2+flush-8:012:27:430
3764175993623,10cyclictest3999000-21ntpq11:02:400
3764178993529,4cyclictest4042236-21grep11:47:351
3764178993510,15cyclictest421rcuog/210:18:591
3764175993530,4cyclictest4059878-21kworker/u8:2+flush-8:012:07:300
376417899344,15cyclictest421rcuog/208:14:581
3764178993427,5cyclictest3831069-21apt-get08:17:251
3764178993425,6cyclictest4084838-21latency_hist12:30:001
3764178993423,8cyclictest281-21systemd-journal10:45:001
3764178993422,10cyclictest0-21swapper/109:05:001
376417899341,6cyclictest38128101kthreadcore07:57:371
3764178993415,16cyclictest3839745-21ntpq08:22:401
3764175993425,6cyclictest3764007-21latency_hist07:10:000
3764175993425,6cyclictest281-21systemd-journal10:20:000
376417899336,18cyclictest421rcuog/212:13:531
3764178993328,3cyclictest3772182-21irqrtprio07:17:311
3764178993327,4cyclictest3776431-21apt-get07:22:251
3764178993325,6cyclictest3880678-21/usr/sbin/munin09:07:431
3764178993322,9cyclictest384-21dbus-daemon12:25:001
3764175993328,4cyclictest3910417-21kworker/u8:2+flush-8:009:37:300
376417899323,25cyclictest0-21swapper/112:17:271
3764178993227,3cyclictest4004731-21cron11:10:001
3764175993227,4cyclictest4029738-21kworker/u8:2+flush-8:011:37:450
3764175993227,4cyclictest3899880-21kworker/u8:1+flush-8:011:17:430
3764175993225,5cyclictest3860300-21latency_hist08:45:000
3764175993223,7cyclictest3796430-21/usr/sbin/munin07:42:380
3764175993222,8cyclictest4054464-21latency_hist12:00:010
376417899318,10cyclictest421rcuog/207:54:471
376417899314,13cyclictest30-21ksoftirqd/110:36:041
3764178993126,3cyclictest3856518-21irqrtprio08:42:311
376417899312,4cyclictest0-21swapper/109:42:261
3764178993120,9cyclictest3866229-21cut08:52:301
3764178993119,9cyclictest454-21mta-sts-daemon10:07:411
3764178993119,10cyclictest3940134-21cron10:05:001
376417899311,11cyclictest3890603-21apt-get09:17:241
3764175993125,4cyclictest3899880-21kworker/u8:1+flush-8:010:02:350
3764185993026,2cyclictest4070332-21fschecks_time12:17:312
3764185993022,6cyclictest4019644-21apt-get11:25:002
3764178993025,3cyclictest0-21swapper/109:35:001
3764178993016,12cyclictest3924221-21needreboot09:47:371
3764178993016,12cyclictest3898871-21kthreadcore09:22:351
3764178993016,12cyclictest3850882-21aten2_r5power_e08:37:281
3764175993025,4cyclictest3899880-21kworker/u8:1+flush-8:009:47:420
3764175993025,4cyclictest3796295-21kworker/u8:2+flush-8:007:47:420
3764175993020,8cyclictest281-21systemd-journal10:37:380
3764175993018,9cyclictest281-21systemd-journal12:20:030
3764185992921,6cyclictest4080336-21apt-get12:27:262
376417899293,21cyclictest0-21swapper/107:42:291
3764178992925,3cyclictest3899880-21kworker/u8:1+events_unbound09:52:311
3764178992925,2cyclictest3816791-21irqcore08:02:311
3764178992921,5cyclictest4039660-21latency_hist11:45:001
3764178992920,7cyclictest3899880-21kworker/u8:1+flush-8:012:37:301
3764178992919,8cyclictest3980407-21apt-get10:47:261
3764178992919,8cyclictest3980407-21apt-get10:47:261
3764178992916,11cyclictest4029449-21unixbench_multi11:32:461
3764178992915,12cyclictest3805662-21unixbench_multi07:47:451
376417899291,23cyclictest3945743-21apt-get10:12:251
3764175992924,4cyclictest4044585-21kworker/u8:0+flush-8:011:52:290
3764175992924,4cyclictest3899880-21kworker/u8:1+flush-8:010:07:420
3764175992924,3cyclictest3965089-21cron10:30:000
3764175992923,4cyclictest2951461-21kworker/u8:3+events_unbound07:27:390
3764175992922,5cyclictest3899880-21kworker/u8:1+flush-8:011:22:440
3764178992824,2cyclictest3998969-21needreboot11:02:391
3764178992823,3cyclictest3845908-21apt-get08:32:271
376417899282,23cyclictest3914447-21ntpq09:37:401
3764178992813,13cyclictest3788638-21kthreadcore07:32:371
376417899281,24cyclictest582-21snmpd11:27:411
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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