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2026-04-21 - 11:16

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 100 highest latencies:
System rack7slot7s.osadl.org (updated Tue Apr 21, 2026 00:43:49)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
982721280,0sleep00-21swapper/021:26:060
2061728975,10sleep00-21swapper/019:06:540
2084328760,8sleep30-21swapper/319:09:503
2059428070,6sleep20-21swapper/219:06:362
2065227857,6sleep10-21swapper/119:07:191
205042470,0sleep20-21swapper/200:07:162
2093299290,2cyclictest141rcu_preempt00:17:251
20932992525,0cyclictest0-21swapper/121:53:341
20930992524,1cyclictest0-21swapper/000:15:140
20943992321,1cyclictest39-21ksoftirqd/321:17:173
2094399230,0cyclictest0-21swapper/323:24:583
2093899230,22cyclictest0-21swapper/200:29:332
2093899230,19cyclictest0-21swapper/223:10:512
2093299231,21cyclictest13739-21diskmemload21:33:271
2093299231,21cyclictest13739-21diskmemload21:33:271
2093899220,22cyclictest0-21swapper/223:44:042
2093899220,21cyclictest0-21swapper/223:30:312
20932992214,2cyclictest0-21swapper/123:31:541
2094399210,21cyclictest0-21swapper/300:01:543
202442210,0sleep20-21swapper/221:51:402
2094399200,1cyclictest0-21swapper/320:00:133
2094399200,19cyclictest20890-21sh22:50:173
2093899200,19cyclictest0-21swapper/222:57:442
20932992018,1cyclictest0-21swapper/122:35:241
20932992014,5cyclictest38150irq/131-snd_hda19:25:281
2093299200,1cyclictest0-21swapper/120:00:141
2094399190,2cyclictest0-21swapper/323:14:463
2093299190,18cyclictest0-21swapper/121:24:271
191952190,0sleep30-21swapper/321:31:543
191952190,0sleep30-21swapper/321:31:543
2094399180,3cyclictest0-21swapper/323:53:023
20943991714,2cyclictest39-21ksoftirqd/321:10:123
2094399170,2cyclictest0-21swapper/300:17:043
2094399170,1cyclictest0-21swapper/323:04:113
2094399170,17cyclictest0-21swapper/322:08:143
20938991712,2cyclictest0-21swapper/222:19:222
2093899170,17cyclictest0-21swapper/222:31:492
2093299176,6cyclictest225-21systemd-journal23:50:001
2093099171,5cyclictest12486-21hddtemp_smartct22:45:140
2094399167,6cyclictest39-21ksoftirqd/321:44:023
2094399162,13cyclictest0-21swapper/320:55:133
2094399160,15cyclictest29680-21kworker/u8:323:42:563
2093899160,1cyclictest0-21swapper/222:42:142
2093299160,14cyclictest0-21swapper/123:11:221
2093099160,3cyclictest0-21swapper/020:05:140
2094399159,6cyclictest39-21ksoftirqd/300:30:333
2094399154,4cyclictest141rcu_preempt21:48:073
20943991513,2cyclictest39-21ksoftirqd/322:28:323
20943991513,2cyclictest39-21ksoftirqd/321:35:233
2093899158,4cyclictest0-21swapper/200:10:182
20938991513,2cyclictest0-21swapper/200:24:452
2093899150,2cyclictest0-21swapper/223:08:512
2093899150,14cyclictest0-21swapper/221:49:572
2093299151,6cyclictest20825-21grep22:50:171
20932991514,1cyclictest38150irq/131-snd_hda23:18:391
20932991513,1cyclictest13739-21diskmemload21:11:511
2093299151,2cyclictest141rcu_preempt23:24:351
2093299151,1cyclictest20928-21cyclictest00:21:431
2093299150,15cyclictest0-21swapper/100:29:201
2093099151,13cyclictest0-21swapper/000:38:030
2093099150,14cyclictest0-21swapper/023:39:260
2094399149,4cyclictest141rcu_preempt00:27:073
2094399143,11cyclictest39-21ksoftirqd/323:18:453
2094399142,3cyclictest141rcu_preempt22:12:553
20943991414,0cyclictest0-21swapper/323:26:533
2094399141,1cyclictest0-21swapper/300:07:153
20943991410,3cyclictest11445-21ls19:55:213
2094399140,1cyclictest0-21swapper/322:59:473
2093899143,5cyclictest15755-21ssh00:05:002
20938991412,2cyclictest32-21ksoftirqd/223:58:162
20938991410,3cyclictest25516-21cut20:25:162
20938991410,3cyclictest2281-21cat19:35:262
20938991410,3cyclictest2281-21cat19:35:262
2093899140,9cyclictest0-21swapper/221:05:142
2093299149,4cyclictest434-21wc19:35:001
2093299146,7cyclictest26864-21apache222:05:261
2093299143,6cyclictest6575-21cron20:55:001
20932991411,2cyclictest12120-21sshd21:05:161
20932991410,3cyclictest16684-21head20:05:271
20932991410,1cyclictest0-21swapper/122:22:571
2093299140,13cyclictest0-21swapper/123:58:151
2093099147,4cyclictest537-21snmpd23:27:100
2093099146,4cyclictest455-21dbus-daemon20:20:000
2093099142,6cyclictest24102-21munin-run00:09:590
20930991411,2cyclictest26420-21grep20:25:260
20930991410,3cyclictest18401-21head00:25:170
20930991410,3cyclictest16345-21sed23:45:200
2093099140,10cyclictest0-21swapper/022:05:140
2094399139,3cyclictest20947-21cron23:10:003
2094399138,1cyclictest7140-21cron00:00:003
2094399132,3cyclictest225-21systemd-journal20:50:003
2094399132,2cyclictest30761-21apt-get23:35:123
2094399132,10cyclictest19401-21/usr/sbin/munin22:30:143
20943991310,2cyclictest32219-21tr20:40:133
20943991310,2cyclictest31364-21grep21:20:153
20943991310,2cyclictest22811-21cron23:50:003
20943991310,2cyclictest11693-21cut22:45:123
2094399130,1cyclictest0-21swapper/321:55:023
2094399130,13cyclictest0-21swapper/321:28:023
2093899139,3cyclictest22789-21sed19:10:272
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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