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2026-01-07 - 15:17

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #5

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 rackeslot5s.osadl.org (updated Wed Jan 07, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27569992523,1cyclictest28-21ksoftirqd/210:16:252
27568992522,2cyclictest22-21ksoftirqd/108:20:011
27568992424,0cyclictest0-21swapper/107:26:251
27568992422,1cyclictest17719-21perf09:00:011
2756899240,23cyclictest19403-21perf11:15:001
2756499240,2cyclictest1763-21perf10:40:010
2756499240,24cyclictest0-21swapper/007:11:230
27570992320,2cyclictest313-21systemd-journal10:00:013
2757099230,22cyclictest21692-21basename08:05:003
27569992323,0cyclictest0-21swapper/212:36:252
27569992321,1cyclictest13209-21apt-get08:51:242
27569992320,0cyclictest151rcu_preempt07:36:242
2756999230,22cyclictest19356-21latency_hist10:10:012
2756999230,22cyclictest19255-21sh08:00:002
2756999230,1cyclictest32691-21apt-get08:25:022
27568992320,2cyclictest606-21dbus-daemon08:35:011
27568992320,2cyclictest27268-21cron09:20:011
2756899230,22cyclictest12076-21cron09:55:011
2756499231,1cyclictest607-21in:imuxsock07:35:010
27570992222,0cyclictest0-21swapper/309:16:233
27570992221,0cyclictest0-21swapper/311:50:013
27570992220,1cyclictest313-21systemd-journal11:30:013
27570992220,1cyclictest24911-21latency_hist09:15:013
27570992220,1cyclictest11754-21awk11:00:013
2757099220,21cyclictest9612-21latency_hist07:40:013
2757099220,21cyclictest26960-21apt-get11:31:243
2757099220,21cyclictest24530-21apt-get10:21:243
2757099220,21cyclictest20662-21apt-get12:25:023
2757099220,21cyclictest0-21swapper/310:36:243
2757099220,1cyclictest29364-21apt-get11:36:243
2757099220,1cyclictest2454-21grep08:30:013
2757099220,1cyclictest18223-21cron12:20:013
2757099220,1cyclictest0-21swapper/308:41:243
2756999220,21cyclictest13818-21apt-get12:11:242
2756999220,21cyclictest0-21swapper/211:56:232
2756999220,21cyclictest0-21swapper/209:50:012
2756999220,21cyclictest0-21swapper/209:26:242
27568992220,1cyclictest10058-21wc08:45:001
2756899220,21cyclictest4555-21perf10:45:011
2756899220,21cyclictest25824-21cron12:35:011
2756899220,21cyclictest24828-21apt-get08:11:241
2756899220,21cyclictest0-21swapper/108:50:021
2756899220,1cyclictest9632-21munin-run07:40:011
2756899220,1cyclictest22-21ksoftirqd/111:01:231
27564992221,0cyclictest0-21swapper/007:26:250
27564992220,1cyclictest29277-21apt-get08:20:020
27564992220,1cyclictest12460-21apt-get09:56:230
27564992220,1cyclictest0-21swapper/009:45:000
27564992220,1cyclictest0-21swapper/009:20:020
27564992220,1cyclictest0-21swapper/008:20:010
2756499220,21cyclictest1757-21apt-get10:40:020
2756499220,21cyclictest12385-21apt-get07:46:240
2756499220,21cyclictest10997-21cron12:05:000
2756499220,21cyclictest0-21swapper/012:26:260
2756499220,1cyclictest7258-21apt-get08:40:030
2756499220,1cyclictest14203-21turbostat.cron11:05:000
2756499220,1cyclictest0-21swapper/011:16:230
2756499220,1cyclictest0-21swapper/008:05:020
2756499220,0cyclictest25260-21apt-get09:16:230
27570992121,0cyclictest0-21swapper/312:11:243
27570992120,1cyclictest30477-21apt-get09:26:243
27570992120,1cyclictest10418-21apt-get08:46:233
27570992119,1cyclictest6171-21cron11:55:013
27570992119,1cyclictest22168-21apt-get11:21:223
27570992119,1cyclictest0-21swapper/310:41:263
2757099210,20cyclictest0-21swapper/312:31:263
2757099210,20cyclictest0-21swapper/312:06:243
2757099210,20cyclictest0-21swapper/310:26:243
2757099210,20cyclictest0-21swapper/309:51:263
2757099210,0cyclictest17325-21apt-get10:06:253
2757099210,0cyclictest0-21swapper/310:51:243
27569992121,0cyclictest0-21swapper/211:11:242
27569992121,0cyclictest0-21swapper/207:41:232
27569992120,1cyclictest0-21swapper/210:40:022
27569992120,0cyclictest5064-21apt-get07:31:212
27569992120,0cyclictest4162-21apt-get11:51:242
27569992120,0cyclictest0-21swapper/212:21:252
27569992120,0cyclictest0-21swapper/209:56:232
27569992119,1cyclictest14830-21apt-get07:51:222
2756999210,20cyclictest12121-21apt-get11:01:232
2756999210,1cyclictest2814-21apt-get08:31:222
2756999210,0cyclictest0-21swapper/210:31:252
27568992121,0cyclictest5210-21apt-get08:36:231
27568992121,0cyclictest0-21swapper/110:06:241
27568992121,0cyclictest0-21swapper/107:31:211
27568992120,1cyclictest32119-21apt-get10:36:241
27568992120,0cyclictest0-21swapper/111:36:241
27568992120,0cyclictest0-21swapper/107:56:231
27568992119,1cyclictest31336-21cron10:35:001
2756899211,1cyclictest211rcuc/112:16:231
2756899210,20cyclictest30265-21apt-get07:16:251
2756899210,20cyclictest0-21swapper/112:01:241
2756899210,20cyclictest0-21swapper/111:41:251
2756899210,20cyclictest0-21swapper/110:21:241
2756899210,20cyclictest0-21swapper/108:46:231
2756899210,20cyclictest0-21swapper/107:46:241
2756899210,20cyclictest0-21swapper/107:11:231
27564992119,1cyclictest15299-21latency_hist08:55:000
27564992118,2cyclictest15846-21turbostat.cron12:15:000
27564992118,2cyclictest12096-21dump-pmu-power09:55:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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