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2026-08-01 - 01:49

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, slot #7

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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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.
Unexpectedly long latencies may be caused by SMIs
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack2slot7s.osadl.org (updated Sat Aug 01, 2026 00:43:07)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3932530994738,6cyclictest4072541-21latency_hist00:00:031
3932529994538,5cyclictest4011470-21systemd-run22:20:020
3932530994436,5cyclictest4032706-21cron22:55:001
3932529994337,4cyclictest3986962-21awk21:40:010
3932531994233,6cyclictest3953533-21tr20:20:012
3932529994236,4cyclictest4055665-21find23:31:000
3932529994235,4cyclictest4026638-21systemd-run22:45:010
3932530994135,3cyclictest0-21swapper/122:05:011
3932530994133,5cyclictest4080429-21sh00:15:011
3932530994133,5cyclictest4060868-21aten_r2power_vo23:40:401
3932530994133,5cyclictest3968510-21diskmemload00:15:381
3932529994134,4cyclictest4095720-21cron00:40:010
3932529994134,4cyclictest4095720-21cron00:40:010
3932531994033,5cyclictest4023671-21latency_hist22:40:022
3932531994033,5cyclictest4023671-21latency_hist22:40:022
3932531994032,5cyclictest3977725-21ssh21:25:002
3932531994032,3cyclictest0-21swapper/221:15:502
3932529994031,7cyclictest3946024-21sh19:55:020
393252999401,32cyclictest151ktimers/020:15:490
3932531993930,5cyclictest4066408-21systemd-run23:50:022
3932530993932,4cyclictest3967019-21munin-plugin-st21:05:011
3932530993931,5cyclictest4066538-21latency_hist23:50:031
3932530993931,5cyclictest4037018-21ssh23:00:541
3932530993931,5cyclictest4018898-21mailstats22:30:591
3932530993929,7cyclictest4095728-21idleruntime-cro00:40:011
3932530993929,7cyclictest4095728-21idleruntime-cro00:40:011
3932530993929,7cyclictest4042817-21latency23:10:471
3932529993931,5cyclictest421-21dbus-daemon23:00:010
3932531993831,4cyclictest4057206-21cron23:35:012
3932530993828,7cyclictest4035796-21idleruntime-cro23:00:011
3932531993730,3cyclictest0-21swapper/222:10:552
3932531993728,6cyclictest4075586-21munin-run00:05:012
3932531993727,6cyclictest4043326-21mailstats23:11:022
3932530993729,5cyclictest3956536-21systemd-run20:30:011
3932530993729,4cyclictest1001-21mta-sts-daemon22:18:191
3932530993728,7cyclictest3994080-21missed_timers21:50:471
3932530993728,6cyclictest1003-21mta-sts-daemon23:35:021
3932529993731,4cyclictest4090672-21needreboot00:30:470
3932529993731,4cyclictest3968143-21kworker/u8:4+rpciod23:20:020
3932529993729,5cyclictest3974652-21ssh21:20:010
3932531993629,4cyclictest4048148-21latency_hist23:20:022
3932531993629,4cyclictest3963991-21cron20:55:002
3932531993628,5cyclictest4035784-21awk23:00:012
3932531993627,5cyclictest4080429-21idleruntime-cro00:15:012
3932531993626,6cyclictest420-21avahi-daemon23:07:002
3932530993631,2cyclictest0-21swapper/121:56:011
3932530993630,4cyclictest3932528-21cyclictest19:26:011
3932530993630,3cyclictest0-21swapper/121:25:421
3932530993628,5cyclictest4016230-21unixbench_singl22:26:001
3932529993628,6cyclictest3968815-21sh21:10:170
3932529993628,5cyclictest4085252-21unixbench_singl00:21:050
3932531993528,3cyclictest0-21swapper/221:45:542
3932531993527,5cyclictest3990148-21latency_hist21:45:022
3932531993527,5cyclictest3935517-21munin-plugin-st19:20:012
3932531993527,5cyclictest1-21systemd21:00:012
3932530993530,3cyclictest0-21swapper/121:20:001
3932530993529,3cyclictest0-21swapper/121:40:011
3932530993529,3cyclictest0-21swapper/100:20:511
3932530993528,5cyclictest0-21swapper/100:10:021
3932530993528,4cyclictest4051085-21latency_hist23:25:011
3932530993527,5cyclictest485-21in:imuxsock00:30:021
3932530993527,5cyclictest4058142-21latency23:35:451
3932529993529,4cyclictest2342389-21munin-node00:16:000
3932529993528,4cyclictest4042819-21latency23:10:470
3932529993528,4cyclictest4015993-21threads22:25:590
3932529993526,6cyclictest0-21swapper/023:25:010
3932531993428,3cyclictest0-21swapper/221:40:012
3932531993426,5cyclictest4052857-21head23:26:012
3932531993426,5cyclictest3994778-21unixbench_multi21:51:022
3932531993426,5cyclictest3947545-21systemd-run20:00:022
3932531993425,6cyclictest0-21swapper/222:05:022
3932531993423,5cyclictest0-21swapper/222:25:492
3932531993422,9cyclictest4024646-21missed_timers22:40:492
3932530993429,2cyclictest0-21swapper/100:30:461
3932530993428,3cyclictest0-21swapper/123:20:011
3932530993427,4cyclictest3957888-21unixbench_multi20:31:001
3932530993426,5cyclictest439-21systemd-logind20:10:011
3932530993426,5cyclictest4028250-21sed22:46:001
3932530993425,6cyclictest485-21in:imuxsock19:20:011
3932530993425,6cyclictest2243543-21cups-browsed23:08:281
3932530993425,6cyclictest2243543-21cups-browsed21:43:191
3932530993425,6cyclictest1000-21mta-sts-daemon22:24:101
3932530993425,5cyclictest1001-21mta-sts-daemon22:39:211
3932530993425,5cyclictest1001-21mta-sts-daemon22:39:211
3932529993422,9cyclictest3935456-21unixbench_singl19:16:010
3932529993422,2cyclictest0-21swapper/021:30:000
3932531993326,4cyclictest3951998-21cron20:15:012
3932531993324,6cyclictest485-21in:imuxsock23:40:032
3932531993324,6cyclictest420-21avahi-daemon20:40:582
3932531993324,6cyclictest3966481-21sshd21:01:012
3932531993324,6cyclictest0-21swapper/220:05:012
3932531993322,7cyclictest1003-21mta-sts-daemon23:01:352
3932530993326,5cyclictest0-21swapper/121:00:021
3932530993324,6cyclictest2243538-21cupsd23:50:231
3932529993328,3cyclictest0-21swapper/021:41:040
3932529993326,5cyclictest3952078-21latency_hist20:15:020
3932529993326,4cyclictest3997902-21ssh21:56:020
3932529993322,8cyclictest4040530-21unixbench_multi23:06:010
3932529993315,11cyclictest12650irq/32-eth021:30:590
3932531993224,5cyclictest3950510-21idleruntime-cro20:10:012
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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