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2026-06-17 - 20:37

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 Wed Jun 17, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
39884072800,5sleep20-21swapper/211:10:322
3744452997362,8cyclictest3749364-21apt-get07:15:011
3744452997362,8cyclictest3749364-21apt-get07:15:001
3744449997044,23cyclictest4049997-21diskstats12:15:260
3744449996845,21cyclictest3975575-21/usr/sbin/munin11:00:320
40323062660,2chrt75-21kworker/3:1-events11:55:333
3744456996561,3cyclictest3965622-21kworker/u8:0+flush-8:011:05:442
3744449996556,7cyclictest1704890-21systemd-journal11:59:590
3744456996256,4cyclictest3860993-21kworker/u8:2+flush-8:009:40:442
3744456995851,5cyclictest3860993-21kworker/u8:2+flush-8:010:35:382
3744452995851,4cyclictest3915353-21latency_hist10:00:001
3744449995853,3cyclictest3830749-21kworker/u8:0+flush-8:009:15:270
3744449995849,6cyclictest3835126-21ntpq08:35:390
3744452995746,8cyclictest4073317-21ntpq12:35:331
3744449995735,20cyclictest3970899-21diskstats10:55:270
3744449995537,15cyclictest1704890-21systemd-journal12:25:280
3744452995438,11cyclictest1704890-21systemd-journal11:44:591
3744449995445,6cyclictest3865707-21latency_hist09:10:010
3744456995348,3cyclictest3965622-21kworker/u8:0+flush-8:010:50:362
3744452995340,9cyclictest1704890-21systemd-journal12:29:591
3744452995339,10cyclictest1704890-21systemd-journal08:54:281
3744449995342,8cyclictest3770459-21ntpq07:30:370
3744449995342,8cyclictest3770459-21ntpq07:30:370
3744449995334,16cyclictest3930179-21latency_hist10:15:000
3744449995325,15cyclictest3847099-21kthreadcore08:50:340
40694212520,2chrt481ktimers/312:35:013
39462862520,2sleep13744444-21cyclictest10:30:301
3744449995244,6cyclictest3895932-21sshd09:40:280
3744456995146,3cyclictest3860993-21kworker/u8:2+flush-8:011:40:422
3744452995141,6cyclictest1704890-21systemd-journal09:16:271
3744449995139,9cyclictest3805401-21ntpq08:05:360
3744449995136,14cyclictest3856570-21sshd09:00:270
3744449995132,17cyclictest3749364-21apt-get07:15:040
3744456995046,3cyclictest3830749-21kworker/u8:0+events_unbound09:15:432
3744456995045,4cyclictest4009582-21kworker/u8:1+flush-8:011:55:392
3744456995045,4cyclictest3686736-21kworker/u8:2+flush-8:007:20:412
3744449995045,4cyclictest3782010-21sshd07:45:280
3744449995043,5cyclictest3965622-21kworker/u8:0+flush-8:011:45:420
3744449995029,19cyclictest4055084-21sshd12:20:280
3744449995029,19cyclictest4055084-21sshd12:20:270
3744452994942,5cyclictest1704890-21systemd-journal08:45:011
3744452994939,7cyclictest3860993-21kworker/u8:2+events_unbound10:05:421
3744452994843,4cyclictest3790651-21ntpq07:50:391
3744449994837,9cyclictest3999107-21ntpq11:20:340
3744456994741,4cyclictest3761448-21kworker/u8:1+events_unbound08:50:452
3744452994741,4cyclictest3761448-21kworker/u8:1+flush-8:007:40:391
3744449994737,8cyclictest3840090-21ntpq08:40:360
3744456994635,8cyclictest4039612-21awk12:04:592
3744452994640,4cyclictest3761448-21kworker/u8:1+events_unbound07:30:311
3744452994640,4cyclictest3761448-21kworker/u8:1+events_unbound07:30:311
3744449994637,7cyclictest3920581-21/usr/sbin/munin10:05:340
3744456994540,4cyclictest3878441-21kworker/u8:3+events_unbound09:20:392
3744452994537,6cyclictest3855786-21latency_hist09:00:011
3744452994535,7cyclictest3965622-21kworker/u8:0+events_unbound11:30:371
3744452994534,8cyclictest3729890-21kworker/u8:0+flush-8:007:25:411
3744456994435,7cyclictest3890447-21turbostat.cron09:35:002
3744452994434,7cyclictest4009582-21kworker/u8:1+events_unbound12:30:421
3744452994432,8cyclictest1704890-21systemd-journal12:05:271
3744456994339,3cyclictest3729890-21kworker/u8:0+flush-8:007:25:382
3744456994336,5cyclictest3831171-21cat08:35:002
3744456994336,2cyclictest3825287-21kworker/u8:2+events_unbound08:35:312
3744452994334,6cyclictest3761448-21kworker/u8:1+events_unbound08:10:431
3744449994223,17cyclictest3990724-21fschecks_time11:15:280
3744456994137,3cyclictest3775534-21kworker/u8:0+events_unbound07:35:422
374444999413,2cyclictest0-21swapper/007:50:230
3744456994036,3cyclictest4035631-21kworker/u8:3+events_unbound12:20:002
3744452994032,6cyclictest3729890-21kworker/u8:0+flush-8:007:15:281
3744452993929,8cyclictest3876145-21diskstats09:20:251
3744452993929,7cyclictest3860993-21kworker/u8:2+flush-8:010:10:371
3744449993928,9cyclictest3989244-21ntpq11:10:370
3744452993831,5cyclictest3990373-21kworker/u8:3+events_unbound11:20:011
3744452993828,7cyclictest3761448-21kworker/u8:1+flush-8:010:40:401
3744449993830,6cyclictest3934457-21ntpq10:15:350
3744449993822,14cyclictest3801352-21cron08:05:010
3744449993820,16cyclictest3825663-21unixbench_multi08:25:430
37442262382,6sleep1885-21mta-sts-daemon07:09:061
3744456993726,8cyclictest3855800-21awk09:00:002
3744452993731,4cyclictest3761448-21kworker/u8:1+flush-8:008:46:091
3744452993730,5cyclictest4029258-21grep11:50:421
3744452993730,5cyclictest3800417-21ntpq08:00:351
3744449993730,5cyclictest1704890-21systemd-journal10:34:150
3744449993719,16cyclictest401-21dbus-daemon09:30:000
381041223630,4sleep03775534-21kworker/u8:0+flush-8:008:10:410
3744456993631,4cyclictest3775534-21kworker/u8:0+events_unbound07:40:422
3744456993629,5cyclictest3749626-21gpgv07:15:022
3744456993629,5cyclictest3749626-21gpgv07:15:012
3744452993627,7cyclictest3935642-21apt-get10:20:231
3744452993625,8cyclictest3761448-21kworker/u8:1+flush-8:009:30:361
3744452993623,9cyclictest1704890-21systemd-journal11:55:271
3744449993632,3cyclictest3761448-21kworker/u8:1+flush-8:007:39:270
3744449993631,4cyclictest3905802-21sshd09:50:270
3744449993631,4cyclictest3905802-21sshd09:50:270
3744449993615,19cyclictest0-21swapper/012:02:280
40135332350,5sleep3451irq_work/311:35:343
3744452993528,5cyclictest3761448-21kworker/u8:1+flush-8:007:35:401
3744452993527,6cyclictest3835985-21latency_hist08:40:011
3744449993525,8cyclictest3749364-21apt-get07:15:010
3744449993525,8cyclictest3749364-21apt-get07:15:000
3744449993520,13cyclictest3916311-21irqcore10:00:300
3744449993519,14cyclictest3830632-21unixbench_singl08:30:450
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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