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2026-04-06 - 08:32

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 Mon Apr 06, 2026 00:44:16)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40901732920,5sleep30-21swapper/300:31:283
38584262540,1sleep03858427-21grep20:36:290
3768632995043,5cyclictest3790474-21kworker/u8:3+flush-8:020:06:341
39570552490,2sleep3481ktimers/322:16:283
3768629994939,8cyclictest4013201-21ntpq23:11:310
3768632994739,6cyclictest280-21systemd-journal00:35:001
3768629994637,6cyclictest4098227-21latency_hist00:40:010
3768629994439,4cyclictest3953966-21kworker/u8:0+events_unbound23:51:270
3768632994231,8cyclictest280-21systemd-journal19:25:001
3768632994231,8cyclictest280-21systemd-journal19:25:001
3768629994134,5cyclictest4004549-21apt-get23:06:180
3768629994134,5cyclictest3824936-21grep20:01:380
3768636994024,14cyclictest3780348-21apt-get19:20:002
3768632994030,8cyclictest280-21systemd-journal21:40:011
3768629994031,6cyclictest3780356-21latency_hist19:20:000
3768636993924,13cyclictest3845701-21fschecks_count20:26:222
3768632993930,7cyclictest3983490-21ntpq22:41:351
376862999392,33cyclictest3790753-21kworker/0:2+events20:41:190
3768632993829,6cyclictest280-21systemd-journal00:06:361
3768632993728,6cyclictest3899743-21latency_hist21:20:001
3768629993732,4cyclictest3904688-21kworker/u8:1+flush-8:023:21:280
3768629993729,6cyclictest4059031-21apt-get00:01:190
3768629993728,7cyclictest4028039-21ntpq23:26:310
376862999372,30cyclictest3790753-21kworker/0:2+events19:55:040
37638342374,9sleep10-21swapper/119:05:251
37638342374,9sleep10-21swapper/119:05:251
3768632993627,6cyclictest3908825-21ntpq21:26:341
3768632993626,8cyclictest3978439-21ntpq22:36:321
3768632993623,5cyclictest3786144-21apt-get19:26:191
376862999362,29cyclictest3949421-21kworker/0:0+events22:30:070
3768636993525,8cyclictest4058663-21cp00:00:012
376862999353,30cyclictest3949421-21kworker/0:0+events22:17:380
376862999353,30cyclictest3894775-21kworker/0:1+events21:52:470
3768629993528,5cyclictest280-21systemd-journal22:21:360
3768629993430,3cyclictest4076026-21kthreadcore00:16:310
3768629993427,5cyclictest280-21systemd-journal20:47:040
3768629993424,7cyclictest3883778-21ntpq21:01:310
3768629993424,7cyclictest3883778-21ntpq21:01:310
376862999341,32cyclictest3894775-21kworker/0:1+events21:32:080
376862999341,28cyclictest3790753-21kworker/0:2+events20:05:490
376862999340,29cyclictest3894775-21kworker/0:1+events22:05:190
3768632993326,5cyclictest4004202-21latency_hist23:05:011
3768629993326,5cyclictest280-21systemd-journal20:27:000
376862999332,30cyclictest3894775-21kworker/0:1+events22:02:390
376862999332,30cyclictest3790753-21kworker/0:2+events20:56:560
376862999332,26cyclictest3894775-21kworker/0:1+events21:55:460
376862999332,26cyclictest3790753-21kworker/0:2+events20:20:070
376862999331,28cyclictest3790753-21kworker/0:2+events20:30:290
376862999331,27cyclictest3790753-21kworker/0:2+events19:45:520
376863699325,22cyclictest3905273-21cat21:26:242
376863699323,22cyclictest4049045-21apt-get23:51:202
3768636993215,15cyclictest3919520-21apt-get21:40:002
3768632993227,3cyclictest4010224-21irqrtprio23:11:261
3768632993224,2cyclictest161rcu_preempt21:25:011
3768632993222,8cyclictest3968569-21ntpq22:26:311
376862999328,20cyclictest3979349-21kworker/0:1+events23:00:080
376862999328,19cyclictest3949421-21kworker/0:0+events22:45:190
376862999328,19cyclictest3758730-21kworker/0:0+events19:11:060
376862999328,19cyclictest3758730-21kworker/0:0+events19:11:060
3768629993223,7cyclictest4072662-21ntpq00:11:310
376862999322,29cyclictest3790753-21kworker/0:2+events21:09:040
376862999321,30cyclictest3979349-21kworker/0:1+events22:54:340
376862999321,30cyclictest3949421-21kworker/0:0+events22:42:140
376862999321,30cyclictest3894775-21kworker/0:1+events21:39:380
376862999321,30cyclictest3790753-21kworker/0:2+events20:14:150
376862999321,27cyclictest3979349-21kworker/0:1+events23:35:250
376862999320,31cyclictest3894775-21kworker/0:1+events21:44:080
376863699313,21cyclictest4093613-21apt-get00:36:202
376863699312,25cyclictest4047940-21ntpq23:46:342
3768636993116,12cyclictest3796095-21aten2_r5power_e19:36:212
3768636993114,14cyclictest3984706-21aten2_r5power_v22:46:212
3768632993127,3cyclictest3951901-21kthreadcore22:11:291
3768632993124,5cyclictest3860289-21apt-get20:41:211
3768632993115,5cyclictest0-21swapper/119:41:371
3768629993123,4cyclictest0-21swapper/019:36:200
376862999312,28cyclictest3790753-21kworker/0:2+events19:52:450
3768629993121,7cyclictest3889580-21apt-get21:10:010
376862999311,29cyclictest3979349-21kworker/0:1+events23:19:220
376862999311,29cyclictest3979349-21kworker/0:1+events22:58:320
376862999310,30cyclictest3979349-21kworker/0:1+events00:20:150
3768636993026,3cyclictest3819461-21needreboot19:56:302
3768636993023,5cyclictest3773629-21kworker/u8:1+flush-8:019:26:342
3768636993015,12cyclictest4024418-21aten2_r5power_v23:26:202
3768632993026,2cyclictest3855503-21cpuspeed_turbos20:36:211
3768632993023,5cyclictest4068919-21apt-get00:11:181
3768632993022,2cyclictest161rcu_preempt20:31:231
3768632993020,8cyclictest3834401-21ntpq20:11:331
376862999302,27cyclictest3949421-21kworker/0:0+events22:29:180
376862999302,27cyclictest3894775-21kworker/0:1+events21:23:010
376862999302,24cyclictest3979349-21kworker/0:1+events23:41:110
376862999301,28cyclictest3790753-21kworker/0:2+events20:50:550
3768629993010,19cyclictest3790753-21kworker/0:2+events19:30:440
376863699298,18cyclictest3923155-21cut21:41:302
376863699292,5cyclictest3890166-21apt-get21:11:212
376863699292,23cyclictest4072721-21ntpq00:11:322
376863699292,21cyclictest3884996-21apt-get21:06:202
3768636992916,11cyclictest0-21swapper/223:15:002
3768636992916,11cyclictest0-21swapper/222:31:382
3768636992915,12cyclictest3910112-21aten2_r5power_v21:31:222
3768636992914,13cyclictest0-21swapper/220:56:342
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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