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2026-08-26 - 10:27

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 Aug 26, 2026 00:43:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1507129772,20sleep10-21swapper/119:06:501
1526629582,9sleep00-21swapper/019:09:220
1505229164,9sleep20-21swapper/219:06:342
1529028565,16sleep30-21swapper/319:09:413
1541899332,26cyclictest225-21systemd-journal23:45:003
1541899290,20cyclictest0-21swapper/321:50:143
15408992926,2cyclictest8022-21diskmemload21:50:470
1541899272,24cyclictest17651-21munin-run21:35:003
1541899261,24cyclictest8022-21diskmemload23:06:093
15408992624,1cyclictest8135-21apt23:45:000
1540899260,1cyclictest0-21swapper/000:20:520
1541899257,17cyclictest8533-21apt-get21:10:033
1541099250,24cyclictest0-21swapper/100:21:111
1541899249,14cyclictest8022-21diskmemload00:37:503
1541899242,19cyclictest14278-21df22:50:163
15418992413,10cyclictest8022-21diskmemload23:03:273
1541899241,21cyclictest0-21swapper/300:26:583
1541899240,23cyclictest0-21swapper/300:33:553
1541899240,22cyclictest0-21swapper/319:35:143
1541499240,0cyclictest0-21swapper/223:33:192
1541099241,22cyclictest0-21swapper/100:10:441
1541899233,18cyclictest16555-21systemctl20:20:003
1541899230,19cyclictest8022-21diskmemload22:31:123
15408992321,1cyclictest8022-21diskmemload00:26:580
15408992314,8cyclictest0-21swapper/023:09:220
1541899224,17cyclictest8022-21diskmemload23:24:143
15418992216,5cyclictest8022-21diskmemload00:20:373
1541899221,20cyclictest8022-21diskmemload00:04:283
1541899221,19cyclictest0-21swapper/320:55:133
1541899220,21cyclictest28275-21taskset22:20:113
1541899220,21cyclictest28275-21taskset22:20:113
1541899220,21cyclictest0-21swapper/300:08:113
1541099220,2cyclictest0-21swapper/122:15:141
15408992220,1cyclictest0-21swapper/021:10:030
15408992218,3cyclictest17650-21turbostat.cron21:35:000
1541899219,11cyclictest28991-21rm22:59:183
1541899212,14cyclictest8022-21diskmemload22:05:153
15418992112,8cyclictest8429-21grep23:25:173
1541899210,20cyclictest8022-21diskmemload22:46:263
1541899210,20cyclictest0-21swapper/323:19:053
1541899210,20cyclictest0-21swapper/322:18:543
1541899210,19cyclictest8022-21diskmemload21:27:323
1541899210,19cyclictest0-21swapper/320:30:143
1541899210,18cyclictest0-21swapper/323:35:023
1541899210,18cyclictest0-21swapper/322:10:433
1541099211,20cyclictest0-21swapper/100:15:141
15408992118,2cyclictest0-21swapper/000:00:140
1541899209,8cyclictest24362-21sh21:19:353
1541899205,14cyclictest8022-21diskmemload23:46:593
1541899205,13cyclictest19741-21users19:15:273
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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