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2026-05-23 - 16:09

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 May 23, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1995121120,0sleep20-21swapper/212:11:202
1144129682,10sleep00-21swapper/007:06:320
1144829380,9sleep20-21swapper/207:06:392
1147328665,6sleep10-21swapper/107:06:571
1144428370,9sleep30-21swapper/307:06:363
132292730,0sleep20-21swapper/211:48:402
11787992926,2cyclictest13-21ksoftirqd/008:25:000
1179299280,28cyclictest0-21swapper/212:16:112
1178899244,5cyclictest2852-21fschecks_count10:25:171
1178799240,0cyclictest0-21swapper/007:20:150
11787992319,3cyclictest13-21ksoftirqd/008:15:010
11797992222,0cyclictest0-21swapper/312:19:123
1179799220,22cyclictest0-21swapper/310:40:183
1179299220,22cyclictest0-21swapper/211:22:532
1178899220,2cyclictest0-21swapper/110:08:081
11787992221,1cyclictest131ksoftirqd/010:43:560
11787992220,1cyclictest13-21ksoftirqd/011:58:500
11787992219,2cyclictest18987-21ssh10:35:120
11787992217,2cyclictest13-21ksoftirqd/012:35:060
1179799211,5cyclictest0-21swapper/309:45:133
1178899213,16cyclictest4822-21diskmemload11:40:541
1179799200,18cyclictest0-21swapper/312:31:543
1179299200,18cyclictest0-21swapper/210:50:452
11787992018,1cyclictest161rcuc/009:40:130
11787992017,1cyclictest13-21ksoftirqd/011:05:020
1179799194,10cyclictest13947-21runrttasks11:10:283
1179799190,1cyclictest0-21swapper/309:27:293
11788991918,1cyclictest0-21swapper/111:51:501
1178899190,17cyclictest0-21swapper/112:15:121
1179799186,3cyclictest225-21systemd-journal09:32:093
1179799180,18cyclictest0-21swapper/312:12:113
11788991817,1cyclictest0-21swapper/110:46:411
1178799189,3cyclictest13-21ksoftirqd/009:28:580
11787991817,1cyclictest0-21swapper/011:00:520
1178799181,2cyclictest141rcu_preempt11:22:230
1178799180,1cyclictest141rcu_preempt09:49:180
11797991714,1cyclictest0-21swapper/308:38:043
1179299170,1cyclictest0-21swapper/211:09:002
1179299170,1cyclictest0-21swapper/209:35:192
1179299170,16cyclictest0-21swapper/210:31:212
1178899172,14cyclictest4822-21diskmemload10:50:411
1178899171,2cyclictest17772-21sed12:30:001
1178899170,17cyclictest0-21swapper/109:52:241
1178899170,16cyclictest0-21swapper/109:07:091
1178899170,16cyclictest0-21swapper/107:45:011
1178799178,8cyclictest8732-21sensors11:45:220
11787991714,2cyclictest13-21ksoftirqd/012:03:090
11787991711,3cyclictest13-21ksoftirqd/010:10:320
11797991614,1cyclictest0-21swapper/312:29:183
11797991614,1cyclictest0-21swapper/311:50:263
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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