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2026-07-29 - 14:18

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
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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 Wed Jul 29, 2026 12:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
373682422060,2sleep3481ktimers/308:22:553
37857982610,3sleep13785802-21cpuspeed_turbos09:12:521
3664330995242,7cyclictest3760389-21latency_hist08:45:010
3664335995141,7cyclictest3829629-21latency_hist09:55:021
3664335994941,5cyclictest3799951-21latency_hist09:25:001
3664330994840,6cyclictest3725561-21apt-get08:10:010
3664335994724,20cyclictest3804212-21ntpq09:28:031
3664330994641,4cyclictest3659242-21kworker/u8:0+events_unbound08:57:560
3664335994525,17cyclictest3974938-21irqrtprio12:22:561
39654072440,6chrt451irq_work/312:12:563
3664335994426,15cyclictest3682249-21irqrtprio07:27:571
38166442430,3chrt0-21swapper/209:42:582
3664330994335,5cyclictest3924111-21latency_hist11:30:000
3664330994334,6cyclictest3909285-21latency_hist11:15:010
3664330994313,16cyclictest584-21runrttasks09:12:500
3664330994232,7cyclictest278-21systemd-journal11:50:000
3664337994137,3cyclictest3983211-21kworker/u8:0+events_unbound12:28:082
3664335994132,6cyclictest3989341-21/usr/sbin/munin12:38:021
3664335994132,6cyclictest3859831-21latency_hist10:25:001
3664335994123,2cyclictest3679410-21kthreadcore07:22:591
3664335994120,3cyclictest0-21swapper/111:47:531
366433599403,13cyclictest3736874-21irqrtprio08:22:551
3664335994029,9cyclictest3714928-21ntpq07:58:021
3664330994010,8cyclictest3710160-21/usr/sbin/munin07:53:070
3664335993921,2cyclictest3963608-21cron12:10:001
3664335993915,5cyclictest0-21swapper/109:47:531
3664330993931,7cyclictest3824547-21sshd09:48:170
3664330993915,12cyclictest3735278-21/usr/sbin/munin08:18:080
3664330993914,11cyclictest3736738-21/usr/sbin/munin08:22:550
3664330993912,16cyclictest3855551-21tr10:22:520
3664330993910,16cyclictest3764468-21/usr/sbin/munin08:48:030
38263592380,3sleep2371rcuc/209:52:572
3664335993830,6cyclictest3659242-21kworker/u8:0+flush-8:008:32:541
366433599382,15cyclictest3851126-21sed10:17:551
366433599382,15cyclictest3851126-21sed10:17:551
366433599382,14cyclictest581-21snmpd10:58:041
3664335993820,2cyclictest0-21swapper/109:18:091
3664335993819,3cyclictest3910472-21irqrtprio11:17:581
366433099389,14cyclictest3860134-21runrttasks10:26:040
3664330993829,6cyclictest278-21systemd-journal10:50:000
3664330993818,3cyclictest3744721-21/usr/sbin/munin08:28:000
366433099381,35cyclictest1-21systemd11:43:170
3664330993813,12cyclictest1-21systemd08:40:000
3664330993813,11cyclictest3895151-21/usr/sbin/munin11:02:510
3664330993811,14cyclictest3794514-21/usr/sbin/munin09:18:080
3664330993811,13cyclictest3804878-21cron09:30:000
3664330993810,16cyclictest3829163-21/usr/sbin/munin09:53:070
3664330993810,15cyclictest3944533-21/usr/sbin/munin11:52:540
3664330993810,15cyclictest3924808-21/usr/sbin/munin11:32:520
39175612370,3sleep00-21swapper/011:22:580
39175612370,3sleep00-21swapper/011:22:580
3664337993733,3cyclictest3819564-21kworker/u8:2+events_unbound11:13:002
3664335993727,8cyclictest278-21systemd-journal09:55:011
366433099378,17cyclictest3716051-21chrt08:02:020
3664330993729,6cyclictest3690298-21ntpq07:33:040
3664330993715,9cyclictest3890347-21/usr/sbin/munin10:57:540
3664330993714,11cyclictest3696561-21/usr/sbin/munin07:42:510
3664330993713,11cyclictest3704873-21wc07:48:000
3664330993712,12cyclictest3830721-21ls09:57:540
3664330993711,15cyclictest3715581-21sshd07:59:170
3664330993710,15cyclictest584-21runrttasks12:23:310
3664330993710,14cyclictest3903497-21/usr/sbin/munin11:08:010
3664337993623,4cyclictest3973546-21kworker/u8:3+events_unbound12:23:062
366433599363,9cyclictest584-21runrttasks08:52:491
3664335993630,4cyclictest3899884-21apt-get11:07:501
3664335993620,3cyclictest0-21swapper/112:20:001
3664335993620,2cyclictest0-21swapper/107:47:561
3664335993620,13cyclictest0-21swapper/111:40:001
366433099369,15cyclictest3671430-21sshd07:15:450
366433099369,14cyclictest3839264-21/usr/sbin/munin10:03:060
366433099368,8cyclictest584-21runrttasks12:39:090
3664330993612,13cyclictest3954408-21sort12:02:520
3664330993610,7cyclictest3988214-21seq12:33:030
3664330993610,16cyclictest3746252-21/usr/sbin/munin08:32:540
3664330993610,15cyclictest3685526-21/usr/sbin/munin07:28:080
3664330993610,13cyclictest3845202-21/usr/sbin/munin10:12:490
3664337993530,3cyclictest3644694-21kworker/u8:2+events_unbound07:20:462
366433599352,3cyclictest39285362mailstats11:33:071
3664335993517,3cyclictest3819499-21unixbench_multi09:43:091
366433099359,15cyclictest3779948-21/usr/sbin/munin09:03:070
3664330993515,8cyclictest3875212-21/usr/sbin/munin10:42:500
3664330993511,13cyclictest3850393-21find10:17:480
3664330993511,13cyclictest3850393-21find10:17:480
3664330993511,12cyclictest36943671kthreadcore07:38:010
3664330993510,13cyclictest3979908-21/usr/sbin/munin12:27:560
3664330993510,11cyclictest3888559-21/usr/sbin/munin10:52:580
3664335993428,3cyclictest3697122-21irqrtprio07:42:561
3664335993419,2cyclictest3944951-21irqcore11:52:571
3664335993418,6cyclictest3964084-21apt-get12:12:481
366433099349,13cyclictest3668535-21ld07:13:020
366433099348,10cyclictest3964803-21sed12:12:560
3664330993414,9cyclictest3814660-21sshd09:38:170
3664330993413,11cyclictest584-21runrttasks09:30:480
3664330993411,8cyclictest3815277-21find09:42:490
3664330993411,13cyclictest584-21runrttasks10:35:590
3664330993410,8cyclictest3770447-21sed08:55:010
3664330993410,13cyclictest3952953-21/usr/sbin/munin11:58:000
3664330993410,13cyclictest3780887-21taskset09:07:530
3664330993410,13cyclictest3676358-21runrttasks07:20:240
366433099338,14cyclictest3910002-21/usr/sbin/munin11:17:540
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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