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2026-07-20 - 05:56

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 Mon Jul 20, 2026 00:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1867329481,9sleep20-21swapper/219:06:152
1893528673,9sleep00-21swapper/019:09:390
1885828464,16sleep10-21swapper/119:08:391
1866228168,9sleep30-21swapper/319:06:083
139972580,0sleep00-21swapper/022:08:290
1904099261,24cyclictest0-21swapper/122:25:001
19045992424,0cyclictest0-21swapper/200:35:342
1904599230,23cyclictest0-21swapper/223:11:162
1904599230,1cyclictest0-21swapper/200:00:152
1904599230,10cyclictest0-21swapper/223:18:252
1904099231,21cyclictest31257-21fschecks_time23:55:161
19050992120,1cyclictest0-21swapper/323:06:143
19040992117,2cyclictest0-21swapper/121:28:481
1904099210,21cyclictest0-21swapper/122:29:091
19036992119,2cyclictest13-21ksoftirqd/000:19:420
19040992019,1cyclictest0-21swapper/123:43:091
19040992018,1cyclictest0-21swapper/123:45:071
19050991915,2cyclictest12102-21diskmemload22:19:423
1904599193,11cyclictest1142-21runrttasks23:44:242
1904599192,5cyclictest1142-21runrttasks00:21:262
1904599190,18cyclictest0-21swapper/222:46:262
19036991919,0cyclictest0-21swapper/021:26:020
19040991813,4cyclictest27721-21ssh21:57:001
1904099180,1cyclictest0-21swapper/121:49:491
1904099180,1cyclictest0-21swapper/100:20:071
1905099170,16cyclictest0-21swapper/300:11:023
19045991715,1cyclictest0-21swapper/221:50:142
1904599170,17cyclictest0-21swapper/223:31:282
19036991716,1cyclictest0-21swapper/000:28:120
1905099161,10cyclictest0-21swapper/300:25:003
1904099162,11cyclictest1142-21runrttasks21:52:021
19040991614,1cyclictest0-21swapper/122:55:201
19040991612,2cyclictest0-21swapper/122:00:581
1904099160,16cyclictest0-21swapper/122:36:261
1903699160,4cyclictest30463-21/usr/sbin/munin23:55:220
19050991514,1cyclictest0-21swapper/323:38:123
19050991512,3cyclictest0-21swapper/323:34:263
1905099150,1cyclictest0-21swapper/323:45:513
1905099150,13cyclictest0-21swapper/300:28:353
1904599150,15cyclictest0-21swapper/222:36:412
1904599150,14cyclictest0-21swapper/221:19:162
1904599150,14cyclictest0-21swapper/221:19:162
1904099159,5cyclictest28293-21/usr/sbin/munin23:15:201
19040991514,1cyclictest0-21swapper/123:50:061
1904099150,1cyclictest0-21swapper/122:16:091
19036991512,1cyclictest0-21swapper/021:10:540
1903699150,1cyclictest0-21swapper/021:55:150
1905099145,6cyclictest8284-21latency_hist19:55:013
19050991412,2cyclictest39-21ksoftirqd/323:22:003
19050991412,2cyclictest39-21ksoftirqd/323:19:573
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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