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2026-06-25 - 00:06

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, 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 50 highest latencies:
System rack7slot7s.osadl.org (updated Wed Jun 24, 2026 12:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1177329574,6sleep00-21swapper/007:09:060
1182728875,9sleep20-21swapper/207:09:482
1173728261,6sleep10-21swapper/107:08:391
1170428262,9sleep30-21swapper/307:08:143
155562630,0sleep10-21swapper/110:32:221
11931992826,1cyclictest0-21swapper/111:13:421
1193199251,3cyclictest141rcu_preempt11:40:261
1193199230,1cyclictest0-21swapper/109:43:451
1193199230,1cyclictest0-21swapper/109:43:441
11931992220,1cyclictest0-21swapper/110:25:171
1193199211,2cyclictest141rcu_preempt11:32:371
1193199210,1cyclictest0-21swapper/112:05:141
1193199210,18cyclictest0-21swapper/112:15:121
11926992118,2cyclictest13-21ksoftirqd/010:53:130
116712210,0sleep10-21swapper/109:13:441
1193399200,17cyclictest0-21swapper/209:45:142
11931992018,1cyclictest25019-21ssh10:00:121
1193199200,18cyclictest0-21swapper/110:42:291
207512190,0sleep10-21swapper/112:30:361
1193699199,9cyclictest4938-21apache210:08:093
1193399190,19cyclictest0-21swapper/209:14:302
1193399190,18cyclictest0-21swapper/212:38:262
1193399190,18cyclictest0-21swapper/209:23:022
1193199190,2cyclictest0-21swapper/111:56:381
1193199190,15cyclictest0-21swapper/109:34:201
1192699196,6cyclictest25234-21awk12:15:010
1192699196,6cyclictest25234-21awk12:15:000
242062180,1chrt24207-21sh09:20:273
1193199180,17cyclictest0-21swapper/109:38:521
1193199180,15cyclictest0-21swapper/110:09:181
1192699185,7cyclictest30063-21munin-run09:25:000
1192699182,14cyclictest29935-21apt-get08:55:030
11926991817,1cyclictest0-21swapper/011:50:480
11926991817,1cyclictest0-21swapper/010:01:190
1192699181,1cyclictest141rcu_preempt11:17:440
11936991716,1cyclictest0-21swapper/309:57:003
11936991713,2cyclictest0-21swapper/312:29:133
1193399176,1cyclictest141rcu_preempt12:11:282
1193399176,1cyclictest141rcu_preempt12:11:272
1193399171,1cyclictest22061-21cpu11:15:152
1193399170,17cyclictest0-21swapper/211:52:432
1193399170,17cyclictest0-21swapper/211:11:192
1193399170,16cyclictest0-21swapper/210:31:092
1193199173,1cyclictest3939-21ssh10:45:131
11931991716,1cyclictest0-21swapper/110:59:341
1193199171,1cyclictest0-21swapper/109:26:031
1193199170,17cyclictest0-21swapper/112:04:131
1193199170,16cyclictest4873-21diskmemload11:53:371
1192699170,1cyclictest0-21swapper/012:02:580
1193699162,5cyclictest273-21systemd-udevd12:34:033
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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