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2026-03-14 - 21:52

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #b, slot #8

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 rackbslot8s (updated Sat Mar 14, 2026 12:44:17)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
698708212194,9sleep10-21swapper/107:08:351
6987122120105,10sleep50-21swapper/507:08:395
6987022120105,10sleep40-21swapper/407:08:304
6986112119104,10sleep70-21swapper/707:07:147
698684211586,9sleep60-21swapper/607:08:166
6985052115100,10sleep20-21swapper/207:05:402
698660211399,9sleep00-21swapper/007:07:540
698598211399,9sleep30-21swapper/307:07:013
6992259910299,3cyclictest553-21snmpd08:46:564
6992259910299,3cyclictest553-21snmpd08:40:084
69922599102100,2cyclictest553-21snmpd09:48:384
699225991020,100cyclictest0-21swapper/407:38:514
699215991020,100cyclictest0-21swapper/207:48:222
6992099910299,3cyclictest553-21snmpd10:50:181
699209991020,100cyclictest0-21swapper/112:36:181
699239991010,99cyclictest0-21swapper/710:19:447
699239991010,99cyclictest0-21swapper/709:37:437
699239991010,101cyclictest0-21swapper/710:22:507
69923499101100,1cyclictest745606-21kworker/6:009:11:316
6992259910199,2cyclictest553-21snmpd12:30:544
6992259910199,2cyclictest553-21snmpd07:15:174
6992259910199,1cyclictest553-21snmpd07:30:274
6992259910198,3cyclictest553-21snmpd10:46:574
6992259910198,3cyclictest553-21snmpd09:57:144
6992259910197,3cyclictest553-21snmpd08:06:164
699225991010,100cyclictest760995-21diskmemload10:57:134
699225991010,100cyclictest0-21swapper/407:42:064
6992209910199,2cyclictest553-21snmpd11:51:023
6992209910199,2cyclictest553-21snmpd08:56:453
6992209910199,2cyclictest553-21snmpd08:56:453
69922099101100,1cyclictest553-21snmpd11:00:373
6992159910199,2cyclictest553-21snmpd11:30:262
6992159910199,2cyclictest553-21snmpd09:18:312
699215991010,101cyclictest0-21swapper/207:36:572
699215991010,100cyclictest0-21swapper/209:53:042
699215991010,100cyclictest0-21swapper/208:12:552
699215991010,100cyclictest0-21swapper/207:22:012
6992099910199,2cyclictest553-21snmpd09:08:431
6992099910199,2cyclictest553-21snmpd08:54:211
699209991010,101cyclictest0-21swapper/112:28:571
699209991010,101cyclictest0-21swapper/111:51:531
699209991010,101cyclictest0-21swapper/109:15:241
699209991010,100cyclictest0-21swapper/107:10:171
699209991010,0cyclictest0-21swapper/108:37:561
699239991000,99cyclictest0-21swapper/710:46:047
699239991000,99cyclictest0-21swapper/709:46:317
699239991000,99cyclictest0-21swapper/709:33:317
699239991000,100cyclictest0-21swapper/707:13:327
6992349910099,1cyclictest745606-21kworker/6:012:25:196
6992349910099,1cyclictest745606-21kworker/6:012:21:296
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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