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2026-04-10 - 04:09

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #a, slot #5

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.

Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackaslot5s.osadl.org (updated Fri Apr 10, 2026 00:43:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
811110,0rcu_preempt19-21ksoftirqd/123:43:521
81880,0rcu_preempt19-21ksoftirqd/120:18:361
81850,0rcu_preempt19-21ksoftirqd/119:59:061
81830,0rcu_preempt19-21ksoftirqd/123:59:021
81810,0rcu_preempt19-21ksoftirqd/120:09:071
81800,0rcu_preempt19-21ksoftirqd/120:58:581
81780,0rcu_preempt3-21ksoftirqd/021:51:330
81770,0rcu_preempt54-21kswapd021:09:271
81750,0rcu_preempt13447-1kworker/1:3H22:44:051
81730,0rcu_preempt1799-21kworker/1:022:20:221
81720,0rcu_preempt6230-1kworker/1:0H22:03:511
81710,0rcu_preempt19-21ksoftirqd/100:24:251
81690,0rcu_preempt3-21ksoftirqd/000:33:460
81680,0rcu_preempt19-21ksoftirqd/123:53:231
81680,0rcu_preempt19-21ksoftirqd/123:06:211
12158996814,0cyclictest0-21swapper/023:56:050
81670,0rcu_preempt19-21ksoftirqd/121:59:531
81670,0rcu_preempt19-21ksoftirqd/100:22:371
81660,0rcu_preempt19-21ksoftirqd/122:16:041
81660,0rcu_preempt19155-21diskmemload23:34:431
81650,0rcu_preempt19-21ksoftirqd/100:35:311
1215899652,0cyclictest10050irq/346-484840022:23:490
1215899652,0cyclictest10050irq/346-484840022:23:490
12158996515,0cyclictest20849-21ssh22:48:380
81640,0rcu_preempt19-21ksoftirqd/121:35:441
81640,0rcu_preempt19-21ksoftirqd/121:24:111
1215899647,0cyclictest3940-21apt-get21:58:470
1215899642,0cyclictest0-21swapper/023:59:340
1215899631,0cyclictest8044-1kworker/0:2H23:41:530
81620,0rcu_preempt19-21ksoftirqd/120:28:481
1215899622,0cyclictest31920-21ssh00:04:390
1215899622,0cyclictest0-21swapper/000:28:040
1215899615,0cyclictest0-21swapper/023:22:370
1215899614,0cyclictest0-21swapper/023:33:470
1215899613,0cyclictest0-21swapper/023:31:020
1215899612,0cyclictest26692-21ssh23:27:100
1215899612,0cyclictest17502-21ssh21:39:020
1215899612,0cyclictest14542-21ssh22:42:010
1215899612,0cyclictest0-21swapper/022:18:470
12158996112,0cyclictest20346-21ssh22:14:310
1215899611,0cyclictest10859-21if_can023:43:540
1215899611,0cyclictest0-21swapper/022:59:120
81600,0rcu_preempt19-21ksoftirqd/122:32:551
81600,0rcu_preempt19-21ksoftirqd/121:54:321
81600,0rcu_preempt19-21ksoftirqd/121:54:321
1215899607,0cyclictest7024-21munin-node0
1215899602,0cyclictest5334-21taskset23:05:040
1215899601,0cyclictest1316-21sshd00:18:480
81590,0rcu_preempt19-21ksoftirqd/122:38:571
81590,0rcu_preempt19-21ksoftirqd/121:18:471
81590,0rcu_preempt19-21ksoftirqd/100:12:231
1215899599,0cyclictest9753-21ssh23:09:240
1215899596,0cyclictest29863-21munin-node0
1215899595,0cyclictest0-21swapper/022:53:420
1215899592,0cyclictest0-21swapper/022:29:060
1215899592,0cyclictest0-21swapper/022:05:550
1215899592,0cyclictest0-21swapper/021:36:080
1215899591,0cyclictest21813-21ssh21:43:520
1215899589,0cyclictest1210-21apt-get20:13:470
1215899587,0cyclictest0-21swapper/000:14:250
1215899583,0cyclictest13983-21sh22:08:480
1215899583,0cyclictest0-21swapper/020:55:170
1215899582,0cyclictest3080-21fw_packets00:08:530
1215899582,0cyclictest19460-21sshd21:08:470
1215899581,0cyclictest17015-21ssh23:49:310
81570,0rcu_preempt19-21ksoftirqd/122:53:581
81570,0rcu_preempt19-21ksoftirqd/121:46:001
1215899576,0cyclictest7472-21rm22:34:140
1215899572,0cyclictest22445-21munin-node0
1215899571,0cyclictest28416-21ping20:18:470
1215899571,0cyclictest2657-21open_inodes21:24:010
1215899571,0cyclictest0-21swapper/022:43:570
1215899571,0cyclictest0-21swapper/021:17:280
81560,0rcu_preempt3-21ksoftirqd/020:32:470
81560,0rcu_preempt19-21ksoftirqd/121:38:381
81560,0rcu_preempt19-21ksoftirqd/100:28:541
1215899562,0cyclictest12477-21kworker/0:023:15:230
1215899561,0cyclictest31755-21ls21:53:550
1215899561,0cyclictest31755-21ls21:53:550
81550,0rcu_preempt6107-21apt-get22:33:471
81550,0rcu_preempt19-21ksoftirqd/121:49:011
81550,0rcu_preempt0-21swapper/121:14:021
1215899559,0cyclictest15443-21ping19:23:520
1215899553,0cyclictest0-21swapper/020:08:570
1215899552,0cyclictest26479-21vmstat19:49:020
1215899551,0cyclictest7981-21dropbear20:33:500
81540,0rcu_preempt9950irq/345-484840020:58:351
81540,0rcu_preempt28416-21ping20:03:561
81540,0rcu_preempt19-21ksoftirqd/123:24:511
81540,0rcu_preempt19-21ksoftirqd/123:14:021
81540,0rcu_preempt19-21ksoftirqd/121:28:491
81540,0rcu_preempt19-21ksoftirqd/120:38:571
1215899542,0cyclictest15443-21ping19:38:460
1215899542,0cyclictest15443-21ping19:18:470
1215899542,0cyclictest0-21swapper/020:23:480
1215899542,0cyclictest0-21swapper/019:33:520
1215899541,0cyclictest16210-21df20:58:500
1215899532,0cyclictest15443-21ping19:43:480
1215899532,0cyclictest0-21swapper/020:48:530
1215899532,0cyclictest0-21swapper/020:47:480
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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