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2026-05-17 - 05:42

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 May 17, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
418274222360,2sleep3471rcuc/300:15:523
1075621840,3sleep375-21kworker/3:1-events00:35:593
1075621840,3sleep375-21kworker/3:1-events00:35:593
64282770,2chrt75-21kworker/3:1-events00:31:023
3877057996457,5cyclictest4123123-21kworker/u8:2+flush-8:023:46:060
3877059996251,9cyclictest4171438-21ntpq00:01:051
3877057996049,8cyclictest3938777-21diskstats20:10:530
3877059995950,6cyclictest4127402-21latency_hist23:20:011
3877057995947,9cyclictest3952113-21ntpq20:21:000
3877057995947,9cyclictest3952113-21ntpq20:21:000
3877063995854,3cyclictest4117241-21kworker/u8:1+flush-8:023:16:042
3877063995853,4cyclictest4137286-21kworker/u8:3+flush-8:023:31:082
41866002560,6sleep20-21swapper/200:16:072
3877063995650,4cyclictest3995729-21kworker/u8:3+events_unbound21:26:012
3877057995446,6cyclictest8209-21apt-get00:35:500
3877057995446,6cyclictest8209-21apt-get00:35:490
3877057995441,9cyclictest280-21systemd-journal20:39:590
3877059995342,8cyclictest3967247-21ntpq20:36:031
3877057995348,4cyclictest3849866-21kworker/u8:2+flush-8:019:21:050
3877057995346,5cyclictest3996901-21ntpq21:06:030
3877057995342,8cyclictest3986966-21ntpq20:56:000
3877057995246,4cyclictest3898337-21kworker/u8:1+flush-8:020:30:530
3877059995141,7cyclictest4123123-21kworker/u8:2+flush-8:023:21:051
3877059995134,14cyclictest280-21systemd-journal22:51:351
3877057995043,5cyclictest4122214-21apt-get23:15:010
3877063994944,4cyclictest4022580-21kworker/u8:1+flush-8:022:01:092
3877063994943,4cyclictest4167500-21kworker/u8:0+events_unbound00:01:042
3877057994841,5cyclictest3922482-21ntpq19:51:000
40890512470,2sleep1281rcuc/122:40:571
3877063994741,4cyclictest3903427-21kworker/u8:0+flush-8:019:51:032
3877059994728,8cyclictest4157643-21apt-get23:50:491
3877057994743,3cyclictest4137286-21kworker/u8:3+events_unbound00:31:080
3877057994737,8cyclictest280-21systemd-journal20:30:000
3877057994737,8cyclictest280-21systemd-journal20:29:590
3877063994636,8cyclictest4067332-21apt-get22:20:002
3877057994639,5cyclictest4112623-21apt-get23:05:490
3877057994634,9cyclictest280-21systemd-journal23:25:000
3877057994539,4cyclictest3849866-21kworker/u8:2+flush-8:019:25:520
3877063994332,8cyclictest3963202-21cat20:35:012
3877057994336,5cyclictest3928351-21latency_hist20:00:010
41891432420,3sleep375-21kworker/3:1+events00:20:593
3877063994231,9cyclictest3953579-21diskstats20:25:532
3877063994231,9cyclictest3953579-21diskstats20:25:522
3877059994235,5cyclictest280-21systemd-journal19:43:351
3877059994233,7cyclictest280-21systemd-journal21:25:011
3877057994237,3cyclictest3839362-21kworker/u8:0+events_unbound19:16:090
3877057994230,9cyclictest4011942-21ntpq21:21:030
3877063994137,3cyclictest4137286-21kworker/u8:3+events_unbound23:36:072
3877059994134,5cyclictest4061535-21ntpq22:11:051
3877059994126,7cyclictest4092840-21apt-get22:45:491
3877059994126,7cyclictest4092840-21apt-get22:45:491
3877057994135,4cyclictest280-21systemd-journal22:03:080
3877057994134,5cyclictest4046639-21kworker/u8:2+flush-8:022:36:020
3877057994134,5cyclictest280-21systemd-journal21:18:030
3877057994132,7cyclictest4098024-21diskstats22:50:510
3877059994032,6cyclictest3903427-21kworker/u8:0+flush-8:020:16:061
3877059994031,7cyclictest280-21systemd-journal22:25:351
3877057994036,3cyclictest4123123-21kworker/u8:2+flush-8:023:26:050
3877057994034,4cyclictest3903427-21kworker/u8:0+events_unbound19:36:180
3877057994032,6cyclictest4137286-21kworker/u8:3+flush-8:023:56:020
3877063993931,6cyclictest280-21systemd-journal19:38:352
3877059993929,8cyclictest3887904-21ntpq19:16:031
3877059993911,14cyclictest4001907-21ntpq21:11:051
3877057993933,4cyclictest4022580-21kworker/u8:1+events_unbound22:41:030
3877057993932,4cyclictest4137286-21kworker/u8:3+events_unbound00:10:510
3877057993928,9cyclictest3947162-21ntpq20:15:580
38767572393,10sleep10-21swapper/119:08:181
3877063993834,3cyclictest3903427-21kworker/u8:0+events_unbound20:11:082
3877059993831,5cyclictest3987018-21ntpq20:56:011
3877059993830,5cyclictest4142529-21apt-key23:35:011
3877059993820,7cyclictest0-21swapper/122:05:531
3877059993811,15cyclictest4041753-21ntpq21:51:061
3877059993811,11cyclictest4021895-21ntpq21:31:031
3877059993810,16cyclictest4176360-21ntpq00:06:031
3877057993832,4cyclictest3849866-21kworker/u8:2+flush-8:020:05:530
387705999379,17cyclictest3922559-21ntpq19:51:031
3877059993711,15cyclictest7005-21ntpq00:31:041
3877059993711,15cyclictest3957110-21ntpq20:26:031
3877059993711,15cyclictest3957110-21ntpq20:26:021
3877059993711,15cyclictest2100-21ntpq00:26:021
3877059993711,13cyclictest3992009-21ntpq21:01:051
3877059993710,14cyclictest3902805-21ntpq19:31:061
3877059993710,12cyclictest4103073-21fschecks_time22:55:541
3877059993710,12cyclictest3958501-21apt-get20:30:501
3877057993732,3cyclictest4022580-21kworker/u8:1+flush-8:022:20:500
387705999369,13cyclictest280-21systemd-journal21:15:351
387705999368,17cyclictest4151515-21ld23:41:021
387705999368,16cyclictest3952165-21ntpq20:21:021
387705999368,16cyclictest3952165-21ntpq20:21:021
387705999368,11cyclictest4187079-21taskset00:20:001
387705999367,17cyclictest3889110-21apt-get19:20:501
3877059993629,5cyclictest4067891-21apt-get22:20:471
3877059993628,6cyclictest3968688-21diskstats20:40:511
3877059993611,14cyclictest3928606-21runrttasks20:00:151
3877059993611,12cyclictest4121299-21ntpq23:11:001
3877057993631,4cyclictest4123123-21kworker/u8:2+flush-8:000:16:060
3877057993630,4cyclictest4046639-21kworker/u8:2+flush-8:023:01:020
3877057993630,4cyclictest3849866-21kworker/u8:2+flush-8:020:46:090
3877063993530,4cyclictest3903427-21kworker/u8:0+events_unbound19:56:072
387705999359,15cyclictest3942261-21ntpq20:11:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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