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2026-05-07 - 15:08

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 07, 2026 12:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
388519921910,4sleep375-21kworker/3:1-events11:16:033
388519921910,4sleep375-21kworker/3:1-events11:16:033
3638272996758,6cyclictest3798795-21latency_hist09:50:011
3638275996454,8cyclictest3942899-21cp12:15:012
3638270996454,7cyclictest3867227-21ntpq10:56:080
3638275996254,6cyclictest3669859-21apt-get07:40:002
3638275996254,6cyclictest3669859-21apt-get07:40:002
3638270996251,7cyclictest3828656-21apt-key10:20:010
3638270996154,4cyclictest3887877-21latency_hist11:20:010
3638270996154,4cyclictest3887877-21latency_hist11:20:010
3638275996053,5cyclictest280-21systemd-journal08:01:022
3638270996052,5cyclictest3769492-21apt-get09:20:550
3638270996048,9cyclictest3659041-21ntpq07:26:090
3638275995949,7cyclictest280-21systemd-journal08:45:002
3638272995940,8cyclictest3843775-21apt-get10:35:551
3638270995931,10cyclictest280-21systemd-journal07:55:010
3638272995847,8cyclictest3718645-21ntpq08:26:091
36845612570,3chrt451irq_work/307:51:133
3638272995648,6cyclictest280-21systemd-journal10:50:001
3638272995545,7cyclictest3729430-21latency_hist08:40:001
3638270995532,6cyclictest3808666-21latency_hist10:00:010
38382632540,1sleep03838261-21sshd10:26:480
3638275995448,4cyclictest2277928-21kworker/u8:0+flush-8:008:51:162
3638272995448,4cyclictest3809004-21apt-get10:00:561
3638272995447,5cyclictest3744799-21apt-get08:55:551
3638270995445,6cyclictest3754368-21latency_hist09:05:010
3638270995427,12cyclictest3669864-21latency_hist07:40:000
3638270995427,12cyclictest3669864-21latency_hist07:40:000
3638272995347,4cyclictest3912903-21apt-get11:45:551
3638270995015,26cyclictest3638108-21kworker/0:3+events07:30:570
3638275994839,7cyclictest280-21systemd-journal11:31:472
3638272994832,5cyclictest280-21systemd-journal09:33:501
3638272994832,5cyclictest280-21systemd-journal09:33:501
3638270994838,9cyclictest3595366-21kworker/u8:2+flush-8:007:46:130
3638272994737,8cyclictest280-21systemd-journal07:11:451
3638270994740,4cyclictest3779067-21latency_hist09:30:010
3638270994737,6cyclictest280-21systemd-journal11:15:000
3638270994737,6cyclictest280-21systemd-journal11:14:590
38146982450,3sleep375-21kworker/3:1+events10:06:013
3638270994536,6cyclictest3853663-21apt-get10:45:560
37288052440,1sleep03728806-21sensors_fan08:36:140
3638275994436,6cyclictest280-21systemd-journal12:32:502
3638270994331,9cyclictest3926557-21kworker/u8:2+flush-8:012:31:150
3638272994118,12cyclictest0-21swapper/108:05:011
3638270994131,8cyclictest3946735-21ntpq12:16:080
3638275994035,3cyclictest3926557-21kworker/u8:2+flush-8:012:21:092
3638272994029,8cyclictest3838841-21apt-get10:30:551
3638270994018,20cyclictest3699776-21kworker/0:1+events08:56:050
3638272993933,4cyclictest3695139-21apt-get08:05:551
3638272993930,7cyclictest3962213-21apt-get12:31:491
363827299388,17cyclictest3654147-21ntpq07:21:091
3638272993829,6cyclictest3903020-21apt-get11:35:551
3638272993812,15cyclictest3877990-21runrttasks11:09:541
3638272993810,14cyclictest3966676-21ntpq12:36:111
3638272993731,4cyclictest3645429-21apt-get07:15:561
3638272993710,16cyclictest3872284-21ntp_states11:01:121
3638272993710,15cyclictest3788200-21ps09:36:121
3638272993710,14cyclictest1-21systemd09:43:491
3638272993710,11cyclictest3882212-21ps11:11:131
3638272993710,11cyclictest3882212-21ps11:11:131
36378882374,11sleep10-21swapper/107:07:431
3638275993631,4cyclictest2277928-21kworker/u8:0+flush-8:007:16:002
363827299369,15cyclictest3947973-21apt-get12:20:561
363827299369,15cyclictest3665054-21latency_hist07:35:011
363827299368,18cyclictest3921595-21ld11:51:081
363827299368,17cyclictest3751049-21cut09:01:051
3638272993619,5cyclictest280-21systemd-journal12:16:481
3638272993610,15cyclictest3743754-21ps08:51:131
3638272993610,15cyclictest3733544-21ntpq08:41:101
3638272993610,14cyclictest3774432-21aten2_r5power_c09:25:551
3638270993626,7cyclictest2277928-21kworker/u8:0+flush-8:010:01:090
3638270993625,8cyclictest3595366-21kworker/u8:2+flush-8:007:19:590
3638275993529,4cyclictest3862901-21kworker/u8:3+events_unbound11:26:142
363827299359,16cyclictest3912325-21sshd11:41:481
363827299359,16cyclictest3705478-21if_enp4s0.208:16:021
363827299359,16cyclictest3674258-21ntpq07:41:111
363827299359,15cyclictest3804059-21aten2_r5power_c09:55:581
363827299359,14cyclictest3758413-21ntpq09:06:081
363827299359,11cyclictest3837745-21ntpq10:26:121
363827299359,10cyclictest3953523-21irqcore12:26:021
363827299358,12cyclictest3936522-21ntpq12:06:121
3638272993525,7cyclictest3858820-21diskstats10:50:581
3638272993515,7cyclictest3942228-21runrttasks12:12:061
3638272993513,9cyclictest589-21runrttasks07:36:561
3638272993513,9cyclictest589-21runrttasks07:36:551
3638272993512,10cyclictest3724250-21runrttasks08:32:401
3638272993511,12cyclictest3679146-21ntpq07:46:081
3638272993510,5cyclictest3774116-21munin-run09:25:001
3638272993510,14cyclictest3888458-21df_inode11:20:591
3638272993510,13cyclictest3822602-21ntpq10:11:091
3638272993510,12cyclictest3713806-21ntpq08:21:101
3638272993510,11cyclictest3768314-21ntpq09:16:091
3638270993528,5cyclictest3719851-21apt-get08:30:560
363827299349,15cyclictest3901810-21ld11:31:081
363827299349,15cyclictest3684069-21ntpq07:51:071
363827299349,14cyclictest3738495-21ntpq08:46:111
363827299349,10cyclictest3764119-21runrttasks09:13:361
363827299348,16cyclictest3926491-21ntpq11:56:081
3638272993411,11cyclictest3659075-21ntpq07:26:101
3638272993410,9cyclictest3887070-21ntpq11:16:091
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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