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2026-09-04 - 04:51

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 Fri Sep 04, 2026 00:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1842328875,9sleep00-21swapper/019:06:460
1865328661,9sleep20-21swapper/219:09:442
1851327958,6sleep10-21swapper/119:07:551
1842127958,6sleep30-21swapper/319:06:433
1876999270,27cyclictest0-21swapper/222:08:202
18765992626,0cyclictest0-21swapper/100:24:461
1876199250,2cyclictest0-21swapper/000:17:070
18765992323,0cyclictest0-21swapper/121:10:281
1876199230,1cyclictest0-21swapper/023:05:340
1876999221,20cyclictest0-21swapper/200:15:232
1876199222,20cyclictest0-21swapper/021:41:230
1877299210,1cyclictest0-21swapper/323:15:143
1876599210,1cyclictest0-21swapper/100:05:501
18772992018,2cyclictest0-21swapper/322:24:513
1876999200,17cyclictest0-21swapper/222:28:582
1876199209,9cyclictest13-21ksoftirqd/023:33:530
18772991918,1cyclictest0-21swapper/322:45:373
18772991917,2cyclictest0-21swapper/322:26:023
1877299191,17cyclictest26758-21rm22:35:253
1876599191,17cyclictest6179-21cstates19:50:161
1876599191,17cyclictest30580-21apt-get21:40:151
1876599190,18cyclictest14927-21ssh23:26:251
99032180,3sleep29908-21unixbench_multi19:55:282
18772991816,1cyclictest0-21swapper/322:55:473
18772991814,3cyclictest17315-21kworker/3:100:27:323
1876999184,2cyclictest225-21systemd-journal00:00:002
1876999180,1cyclictest0-21swapper/222:04:552
1876999180,1cyclictest0-21swapper/221:38:452
1876999180,16cyclictest0-21swapper/200:25:402
1876999180,0cyclictest0-21swapper/223:46:032
1876599180,0cyclictest0-21swapper/121:45:231
1876199181,2cyclictest0-21swapper/022:57:240
18769991716,1cyclictest0-21swapper/223:43:592
1876999170,16cyclictest0-21swapper/221:27:142
1876999170,15cyclictest0-21swapper/220:40:022
1876599170,4cyclictest10813-21kworker/u8:022:27:261
18761991716,1cyclictest0-21swapper/022:18:110
18761991716,1cyclictest0-21swapper/021:38:450
18761991712,1cyclictest13-21ksoftirqd/023:45:220
1876999162,10cyclictest2331-21apt-get23:00:142
18769991615,1cyclictest55650irq/127-enp2s0-00:00:202
18769991614,2cyclictest32-21ksoftirqd/200:32:442
18769991613,2cyclictest32-21ksoftirqd/222:59:592
1876999161,12cyclictest6345-21/usr/sbin/munin21:45:152
18765991612,2cyclictest25-21ksoftirqd/121:00:151
1876599161,14cyclictest12192-21diskmemload23:54:211
1876599160,4cyclictest11742-21missed_timers23:05:181
18772991513,1cyclictest12192-21diskmemload00:00:283
18772991511,1cyclictest0-21swapper/322:31:153
18772991510,4cyclictest4204-21kworker/3:223:35:133
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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