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2026-11-10 - 23:33

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #4

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 rack0slot4s.osadl.org (updated Tue Nov 10, 2026 00:46:12)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
21984502413393,13sleep130-21swapper/1319:07:075
21984902406386,13sleep150-21swapper/1519:07:427
21984042404384,13sleep110-21swapper/1119:06:333
21984552403397,4sleep10-21swapper/119:07:121
21984072385364,14sleep140-21swapper/1419:06:366
21985312366360,4sleep100-21swapper/1019:08:092
21985852356338,12sleep20-21swapper/219:08:498
21986062355316,14sleep00-21swapper/019:09:030
21983802354314,14sleep60-21swapper/619:06:1212
21983412353315,13sleep90-21swapper/919:05:4315
21985482349329,13sleep50-21swapper/519:08:1911
21983382349328,14sleep70-21swapper/719:05:4113
21984572348328,13sleep30-21swapper/319:07:149
21984192348328,13sleep80-21swapper/819:06:4714
21983442344323,14sleep120-21swapper/1219:05:464
21983352344323,14sleep40-21swapper/419:05:3810
2199078995150,0cyclictest0-21swapper/219:55:148
2199090994140,1cyclictest782-21systemd-journal21:22:1312
2199078994036,1cyclictest2511468-21kworker/u32:0+flush-259:023:55:218
2199115993838,0cyclictest0-21swapper/1419:31:536
2199115993636,0cyclictest0-21swapper/1423:00:236
2199078993632,3cyclictest2192955-21kworker/u32:2+events_unbound19:25:218
2199078993532,1cyclictest2479399-21kworker/u32:5+events_unbound00:19:478
2199115993434,0cyclictest0-21swapper/1423:25:316
2199115993434,0cyclictest0-21swapper/1421:28:316
2199115993433,1cyclictest0-21swapper/1422:28:556
219911599342,29cyclictest0-21swapper/1400:13:296
219911599333,0cyclictest0-21swapper/1422:56:416
219909699330,30cyclictest0-21swapper/821:13:5414
2199090993332,1cyclictest0-21swapper/623:52:3912
2199085993332,1cyclictest2447796-21kworker/u32:1+flush-259:023:05:2010
2199115993232,0cyclictest0-21swapper/1423:39:296
2199090993232,0cyclictest0-21swapper/623:33:1612
2199090993232,0cyclictest0-21swapper/621:46:3112
2199090993232,0cyclictest0-21swapper/621:34:3512
2199090993232,0cyclictest0-21swapper/621:34:3412
2199090993232,0cyclictest0-21swapper/619:31:5312
2199115993131,0cyclictest0-21swapper/1423:49:236
2199115993131,0cyclictest0-21swapper/1421:24:136
2199115993131,0cyclictest0-21swapper/1421:15:426
2199115993131,0cyclictest0-21swapper/1420:00:156
2199115993130,1cyclictest0-21swapper/1400:30:146
219911599312,29cyclictest0-21swapper/1423:07:416
219910999310,30cyclictest0-21swapper/1223:25:164
219910699310,30cyclictest0-21swapper/1122:06:203
219910699310,30cyclictest0-21swapper/1120:21:403
2199104993129,1cyclictest2397048-21kworker/10:0+events23:39:432
2199104993129,1cyclictest2237459-21kworker/10:2+events21:11:332
219909699310,30cyclictest0-21swapper/820:40:4314
2199094993130,1cyclictest1774-21snmpd21:26:1513
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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