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2026-05-24 - 00:26

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #4, slot #1

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, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack4slot1s.osadl.org (updated Sat May 23, 2026 12:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
837021150,3sleep129-21ksoftirqd/108:57:391
837021150,3sleep129-21ksoftirqd/108:57:391
2541121080,2chrt25405-21gzip11:07:510
2541121080,2chrt25405-21gzip11:07:510
1542021070,2sleep10-21swapper/107:47:531
1542021070,2sleep10-21swapper/107:47:531
767821060,3sleep17681-21idleruntime11:47:481
767821060,3sleep17681-21idleruntime11:47:481
767821060,3sleep17681-21idleruntime11:47:481
290821060,2sleep12907-21gzip10:07:501
290821060,2sleep12907-21gzip10:07:501
3164921040,1sleep10-21swapper/109:57:531
3164921040,1sleep10-21swapper/109:57:531
3164921040,1sleep10-21swapper/109:57:531
264182990,4sleep11682-21cyclictest11:12:341
264182990,4sleep11682-21cyclictest11:12:341
226232980,3sleep30-21swapper/309:32:553
226232980,3sleep30-21swapper/309:32:553
226232980,3sleep30-21swapper/309:32:553
254312870,3sleep30-21swapper/308:14:403
254312870,3sleep30-21swapper/308:14:403
254312870,3sleep30-21swapper/308:14:403
149392750,3sleep30-21swapper/307:47:473
149392750,3sleep30-21swapper/307:47:473
108422710,4chrt10843-21cat11:57:331
108422710,4chrt10843-21cat11:57:331
108422710,4chrt10843-21cat11:57:331
59652680,3sleep30-21swapper/308:47:573
59652680,3sleep30-21swapper/308:47:573
154922610,4sleep115493-21needreboot12:07:501
154922610,4sleep115493-21needreboot12:07:501
123182510,1sleep112412-21fschecks_time09:07:451
123182510,1sleep112412-21fschecks_time09:07:451
123182510,1sleep112412-21fschecks_time09:07:451
1692995026,22cyclictest6352-21cron08:52:331
1692995026,22cyclictest6352-21cron08:52:331
211712450,2sleep30-21swapper/312:22:513
211712450,2sleep30-21swapper/312:22:513
44262420,5sleep1281ktimers/111:37:551
44262420,5sleep1281ktimers/111:37:551
92142410,3sleep30-21swapper/308:57:533
92142410,3sleep30-21swapper/308:57:533
1686994113,26cyclictest15649-21fschecks_time10:42:460
1686994113,26cyclictest15649-21fschecks_time10:42:460
1686994017,21cyclictest19857-21fschecks_count09:27:470
1686994012,6cyclictest15097-21seq10:41:420
260502390,1sleep125946-21/usr/sbin/munin12:37:461
260502390,1sleep125946-21/usr/sbin/munin12:37:461
260502390,1sleep125946-21/usr/sbin/munin12:37:461
1686993918,19cyclictest0-21swapper/012:17:480
1686993918,19cyclictest0-21swapper/012:17:480
1686993918,19cyclictest0-21swapper/008:02:330
1686993918,19cyclictest0-21swapper/008:02:330
1686993915,22cyclictest1682-21cyclictest09:07:540
1686993915,22cyclictest1682-21cyclictest09:07:540
1686993915,22cyclictest1682-21cyclictest09:07:540
1686993913,3cyclictest0-21swapper/011:42:480
1686993913,3cyclictest0-21swapper/011:42:480
1686993913,24cyclictest0-21swapper/009:12:580
1686993913,24cyclictest0-21swapper/009:12:580
1686993911,5cyclictest0-21swapper/010:02:570
1686993911,5cyclictest0-21swapper/010:02:570
1686993911,5cyclictest0-21swapper/010:02:570
168699391,12cyclictest8513-21sed10:22:510
168699391,12cyclictest8513-21sed10:22:510
1686993911,25cyclictest0-21swapper/007:32:380
1686993911,25cyclictest0-21swapper/007:32:380
1686993911,25cyclictest0-21swapper/007:32:380
1686993910,3cyclictest0-21swapper/012:02:490
1686993910,3cyclictest0-21swapper/012:02:490
1686993910,3cyclictest0-21swapper/012:02:490
168699389,4cyclictest0-21swapper/009:17:490
168699389,4cyclictest0-21swapper/009:17:490
168699389,3cyclictest0-21swapper/011:17:380
168699389,3cyclictest0-21swapper/011:17:380
1686993817,19cyclictest0-21swapper/011:37:460
1686993816,20cyclictest0-21swapper/011:02:390
1686993816,20cyclictest0-21swapper/011:02:390
1686993816,20cyclictest0-21swapper/008:12:490
1686993816,20cyclictest0-21swapper/008:12:490
1686993816,20cyclictest0-21swapper/008:12:490
1686993813,23cyclictest4784-21needreboot10:12:510
1686993813,23cyclictest4784-21needreboot10:12:510
1686993813,23cyclictest0-21swapper/011:27:460
168699381,11cyclictest22258-21seq12:27:430
168699381,11cyclictest22258-21seq12:27:430
74922370,2sleep07677-21/usr/sbin/munin11:47:480
74922370,2sleep07677-21/usr/sbin/munin11:47:480
74922370,2sleep07677-21/usr/sbin/munin11:47:480
1692993730,5cyclictest28374-21missed_timers08:22:481
1692993730,5cyclictest28374-21missed_timers08:22:481
1692993730,5cyclictest28374-21missed_timers08:22:481
1686993717,18cyclictest0-21swapper/008:22:470
1686993717,18cyclictest0-21swapper/008:22:470
1686993717,18cyclictest0-21swapper/008:22:470
1686993712,3cyclictest0-21swapper/008:02:500
1686993712,3cyclictest0-21swapper/008:02:500
1686993712,3cyclictest0-21swapper/008:02:500
1686993712,21cyclictest0-21swapper/012:32:440
1686993712,21cyclictest0-21swapper/012:32:440
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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