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2026-09-07 - 07:50

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 Sep 07, 2026 00:43:47)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1010329369,8sleep00-21swapper/019:06:210
1017229171,16sleep20-21swapper/219:07:152
1012428164,13sleep10-21swapper/119:06:381
1005228168,9sleep30-21swapper/319:05:453
323252590,0sleep30-21swapper/321:26:243
239372300,0sleep30-21swapper/321:21:233
1046699270,26cyclictest0-21swapper/222:01:182
1046699242,12cyclictest0-21swapper/220:15:132
1046699230,23cyclictest0-21swapper/221:39:262
1046699230,22cyclictest0-21swapper/221:56:362
1045799230,23cyclictest0-21swapper/023:54:540
1045799222,2cyclictest0-21swapper/022:45:130
319312210,2sleep131276-21kworker/1:122:43:441
1046299210,2cyclictest0-21swapper/121:36:471
1046299210,0cyclictest0-21swapper/122:21:001
1046699200,20cyclictest0-21swapper/223:29:102
1046699200,1cyclictest0-21swapper/222:05:132
10462992018,2cyclictest25-21ksoftirqd/122:04:011
304632190,0chrt0-21swapper/023:01:420
1046699190,2cyclictest0-21swapper/223:54:082
10457991911,7cyclictest29960-21apache222:05:060
1046299184,7cyclictest11665-21/usr/sbin/munin22:50:271
1046299180,2cyclictest0-21swapper/122:38:031
1046999176,2cyclictest13300-21taskset22:51:273
1046999170,17cyclictest0-21swapper/321:37:213
1045799172,4cyclictest225-21systemd-journal22:15:000
10457991710,6cyclictest1109-21perf21:04:590
1045799170,0cyclictest0-21swapper/022:35:260
160812160,0sleep00-21swapper/021:16:480
1046699160,15cyclictest0-21swapper/222:30:072
1046699160,14cyclictest0-21swapper/222:58:332
10462991614,1cyclictest0-21swapper/123:35:131
1046299160,3cyclictest0-21swapper/123:30:201
1046299160,10cyclictest0-21swapper/121:55:111
1045799164,6cyclictest6998-21awk00:24:590
1045799160,15cyclictest0-21swapper/022:01:090
1046999154,2cyclictest30115-21apache_processe00:00:143
10469991513,2cyclictest39-21ksoftirqd/300:26:353
1046999150,15cyclictest0-21swapper/323:39:353
1046999150,14cyclictest0-21swapper/322:38:573
10462991510,2cyclictest0-21swapper/123:52:351
1046299150,2cyclictest0-21swapper/120:00:161
1045799150,14cyclictest0-21swapper/022:30:380
10469991410,3cyclictest17353-21tr20:30:153
10466991414,0cyclictest0-21swapper/223:10:562
10466991410,3cyclictest23759-21turbostat00:34:592
10466991410,3cyclictest17827-21cut20:30:172
1046699140,1cyclictest0-21swapper/223:59:222
1046699140,13cyclictest0-21swapper/222:40:552
1046299147,6cyclictest17585-21sed22:15:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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