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2026-06-17 - 15:58

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 Jun 17, 2026 12:43:48)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
700329278,9sleep00-21swapper/007:05:050
896028572,9sleep20-21swapper/207:07:442
892228265,13sleep10-21swapper/107:07:151
884228269,9sleep30-21swapper/307:06:133
49292600,0sleep00-21swapper/010:09:220
272452460,0sleep30-21swapper/310:41:143
96282320,0sleep10-21swapper/111:48:041
9223992624,1cyclictest18128-21memory10:55:172
922799250,23cyclictest0-21swapper/310:34:453
922399250,25cyclictest0-21swapper/209:27:022
921799250,22cyclictest0-21swapper/009:27:020
9223992423,1cyclictest0-21swapper/209:16:002
9223992322,1cyclictest0-21swapper/209:48:142
9221992216,5cyclictest13968-21systemctl07:20:001
240992220,0sleep30-21swapper/310:00:353
9223992119,2cyclictest32-21ksoftirqd/210:01:302
922399210,21cyclictest0-21swapper/210:21:112
922399210,20cyclictest0-21swapper/209:59:592
922399200,1cyclictest0-21swapper/212:12:002
9221992017,2cyclictest25-21ksoftirqd/112:18:111
9221992017,2cyclictest25-21ksoftirqd/112:18:101
921799200,19cyclictest0-21swapper/012:34:550
9221991914,3cyclictest0-21swapper/109:28:391
922799181,15cyclictest15169-21lsb_release10:53:583
9221991813,4cyclictest38150irq/131-snd_hda08:40:431
922199180,18cyclictest0-21swapper/111:31:151
921799186,6cyclictest29473-21munin-run09:00:010
9223991717,0cyclictest0-21swapper/211:17:462
922399170,1cyclictest0-21swapper/211:58:582
922199171,1cyclictest1821-21diskmemload11:18:121
9217991711,4cyclictest13-21ksoftirqd/012:25:110
921799170,16cyclictest0-21swapper/012:00:350
43642170,0chrt0-21swapper/110:08:551
116162170,0sleep10-21swapper/111:10:261
922799161,11cyclictest22579-21apt10:20:003
922799160,15cyclictest0-21swapper/312:34:443
9223991615,1cyclictest32-21ksoftirqd/211:36:212
9223991610,1cyclictest0-21swapper/210:13:062
922199160,15cyclictest0-21swapper/112:09:561
921799162,13cyclictest1800-21sh12:21:320
921799160,2cyclictest0-21swapper/010:47:040
921799160,16cyclictest0-21swapper/011:16:340
9227991513,1cyclictest9211-21cyclictest11:54:243
9227991513,1cyclictest1821-21diskmemload10:00:003
922799150,1cyclictest0-21swapper/312:35:503
922799150,13cyclictest0-21swapper/309:35:033
922399152,10cyclictest29058-21grep11:40:162
9223991515,0cyclictest0-21swapper/210:30:572
9223991514,1cyclictest0-21swapper/212:25:362
922399150,1cyclictest0-21swapper/212:08:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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