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2026-09-19 - 07:48

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 Sat Sep 19, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1460821360,0sleep30-21swapper/323:07:423
1899729679,10sleep30-21swapper/319:07:273
1885329279,9sleep00-21swapper/019:05:360
1885028875,9sleep20-21swapper/219:05:332
1906028467,13sleep10-21swapper/119:08:181
238122670,0sleep30-21swapper/323:32:423
41652650,0sleep10-21swapper/121:43:521
19283993429,4cyclictest1547-21ssh23:39:063
19275993228,1cyclictest13-21ksoftirqd/000:05:570
1928399310,19cyclictest16783-21kworker/3:019:52:463
19275993112,5cyclictest13-21ksoftirqd/023:36:120
1928399272,24cyclictest0-21swapper/323:17:463
1927799262,23cyclictest13621-21tail23:45:261
1927599250,21cyclictest25529-21sh23:34:030
1928199240,24cyclictest0-21swapper/200:09:392
1928199230,23cyclictest0-21swapper/200:18:522
1927799230,2cyclictest0-21swapper/100:29:281
1927799230,20cyclictest0-21swapper/121:10:491
19275992321,1cyclictest0-21swapper/000:33:200
19275992319,3cyclictest4488-21ssh00:00:130
19275992319,3cyclictest4488-21ssh00:00:120
1927599230,21cyclictest0-21swapper/023:03:070
1928399222,19cyclictest16783-21kworker/3:019:56:413
19283992214,6cyclictest29588-21/usr/sbin/munin00:15:153
1927799210,19cyclictest0-21swapper/100:32:041
52432200,0sleep00-21swapper/022:42:340
1928199203,15cyclictest0-21swapper/223:35:502
1928199200,1cyclictest0-21swapper/200:21:262
1927799200,18cyclictest16913-21awk20:10:221
1927599205,5cyclictest13-21ksoftirqd/022:06:070
1927599200,4cyclictest0-21swapper/022:31:450
1927599200,1cyclictest0-21swapper/000:29:370
1927799191,1cyclictest8117-21expr21:00:161
1927799190,1cyclictest11906-21diskmemload22:13:571
1927599195,7cyclictest17558-21ssh23:10:000
19275991918,1cyclictest161rcuc/000:15:140
19275991915,3cyclictest13-21ksoftirqd/022:25:070
19275991915,3cyclictest13-21ksoftirqd/022:25:060
273262180,0sleep30-21swapper/322:16:523
1928199182,15cyclictest10415-21runrttasks21:28:062
1928199180,18cyclictest0-21swapper/223:40:142
19275991812,1cyclictest13-21ksoftirqd/023:58:540
1927599180,7cyclictest0-21swapper/022:02:530
1927599180,4cyclictest0-21swapper/022:36:080
1928399171,0cyclictest0-21swapper/322:30:553
1928199170,0cyclictest0-21swapper/222:40:052
19277991716,1cyclictest0-21swapper/119:30:111
1927799171,2cyclictest0-21swapper/122:25:301
1927799171,2cyclictest0-21swapper/122:25:291
1927799170,3cyclictest0-21swapper/121:58:431
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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