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2026-04-09 - 07:46

OSADL QA Farm on Real-time of Mainline Linux

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

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 50 highest latencies:
System rack7slot2s.osadl.org (updated Thu Apr 09, 2026 00:48:36)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
226682699276191,51cyclictest0-21swapper/000:17:020
226682699266151,101cyclictest2293858-21ntp_offset21:41:290
226682699266131,118cyclictest0-21swapper/021:50:040
226682699266131,118cyclictest0-21swapper/021:50:030
226682699265169,61cyclictest2266825-21cyclictest21:22:020
226682699265169,61cyclictest2266825-21cyclictest21:22:010
226682699264149,68cyclictest2302390-21ssh22:21:040
226682699263136,79cyclictest2271262-21df19:35:350
226682699263136,79cyclictest2271262-21df19:35:350
226682699262179,52cyclictest171rcu_preempt21:50:230
226682699262179,52cyclictest171rcu_preempt21:50:220
226682699261153,91cyclictest0-21swapper/000:35:590
226682699261153,91cyclictest0-21swapper/000:35:590
226682699261153,74cyclictest2289993-21kworker/u10:7-rpciod21:35:050
226682699261153,74cyclictest2289993-21kworker/u10:7-rpciod21:35:040
226682699259128,115cyclictest0-21swapper/019:51:020
226682699259128,115cyclictest0-21swapper/019:51:020
226682699258192,35cyclictest171rcu_preempt19:42:050
226682699257191,35cyclictest171rcu_preempt22:00:290
226682699257191,35cyclictest171rcu_preempt22:00:290
226682699256113,94cyclictest2311935-21irqstats23:05:460
226682699256113,94cyclictest2311935-21irqstats23:05:460
226682699255186,37cyclictest171rcu_preempt20:55:340
226682699255186,37cyclictest171rcu_preempt20:55:340
226682699255164,56cyclictest2283131-21ntpq20:46:260
226682699255164,56cyclictest2283131-21ntpq20:46:250
226682699254125,113cyclictest0-21swapper/020:21:460
226682699253190,35cyclictest171rcu_preempt22:14:370
226682699253167,58cyclictest171rcu_preempt23:24:000
226682699253167,58cyclictest171rcu_preempt23:23:590
226682699253152,79cyclictest2305715-21kworker/u10:5-rpciod23:41:010
226682699253152,79cyclictest2305715-21kworker/u10:5-rpciod23:41:010
226682699253140,97cyclictest0-21swapper/021:30:030
226682699253128,110cyclictest0-21swapper/023:50:280
226682699253120,42cyclictest171rcu_preempt23:56:380
226682699253120,42cyclictest171rcu_preempt23:56:370
226682699252165,69cyclictest0-21swapper/022:26:360
226682699252160,76cyclictest0-21swapper/021:35:290
226682699252142,91cyclictest0-21swapper/023:45:570
226682699252133,82cyclictest2318428-21/usr/sbin/munin23:35:510
226682699251133,100cyclictest0-21swapper/022:57:030
226682699250144,88cyclictest0-21swapper/022:06:430
226682699250144,88cyclictest0-21swapper/022:06:430
226682699250127,87cyclictest0-21swapper/021:15:080
226682699250127,87cyclictest0-21swapper/021:15:080
226682699249162,56cyclictest0-21swapper/022:45:510
226682699249159,68cyclictest2323322-21kworker/u9:6+rpciod00:22:270
226682699249159,68cyclictest2323322-21kworker/u9:6+rpciod00:22:270
226682699249145,90cyclictest2272940-21df19:45:320
226682699249137,95cyclictest0-21swapper/020:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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