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2025-12-22 - 13:03

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 Mon Dec 22, 2025 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
225982370350,13sleep150-21swapper/1519:08:417
225472361342,12sleep130-21swapper/1319:08:065
225282359322,13sleep120-21swapper/1219:07:494
192262358337,14sleep100-21swapper/1019:05:062
226042357338,12sleep30-21swapper/319:08:459
224142356336,13sleep140-21swapper/1419:06:156
226652354323,13sleep110-21swapper/1119:09:253
224022353342,7sleep80-21swapper/819:06:0914
226302351331,13sleep60-21swapper/619:09:0412
223622348327,14sleep50-21swapper/519:05:3311
223642347327,13sleep70-21swapper/719:05:3613
224742345325,13sleep20-21swapper/219:07:078
224782344322,14sleep40-21swapper/419:07:0910
223742344325,12sleep00-21swapper/019:05:450
223932343322,14sleep10-21swapper/119:06:021
223662343323,13sleep90-21swapper/919:05:3815
230629910025,15cyclictest0-21swapper/720:50:0013
23056999235,28cyclictest0-21swapper/620:50:0012
23051999033,29cyclictest0-21swapper/420:49:5910
23067998625,29cyclictest0-21swapper/820:49:5914
23085997574,1cyclictest2865-21Xorg20:50:016
2305499750,61cyclictest0-21swapper/520:49:5911
23049996160,1cyclictest765-21systemd-journal20:50:019
23076995958,1cyclictest2865-21Xorg20:50:013
23041995958,1cyclictest2865-21Xorg20:50:001
23074995224,28cyclictest0-21swapper/1020:50:002
23089995151,0cyclictest2865-21Xorg20:49:597
23049994739,5cyclictest77864-21kworker/u32:1+flush-259:020:18:169
23049994642,4cyclictest0-21swapper/323:15:049
23049994642,4cyclictest0-21swapper/322:35:249
23049994637,5cyclictest70082-21kworker/u32:2+flush-259:020:35:209
23049994637,5cyclictest252710-21kworker/u32:4+events_unbound00:14:549
23049994633,3cyclictest0-21swapper/300:02:299
23049994434,10cyclictest185170-21ntpq22:20:219
23041994435,4cyclictest211051-21kworker/u32:4-flush-259:022:52:561
23049994339,4cyclictest0-21swapper/322:06:069
23049994339,4cyclictest0-21swapper/321:34:209
23049994235,4cyclictest0-21swapper/322:27:209
2304199420,41cyclictest0-21swapper/100:35:211
23070994141,0cyclictest0-21swapper/900:32:2015
23079994039,1cyclictest2865-21Xorg20:49:594
2307099400,40cyclictest0-21swapper/920:50:0015
23049994038,1cyclictest0-21swapper/300:35:209
2304999400,39cyclictest0-21swapper/319:20:149
23041994040,0cyclictest0-21swapper/123:45:081
23041994040,0cyclictest0-21swapper/122:06:451
23041994040,0cyclictest0-21swapper/121:52:461
23076993938,1cyclictest4051012-21kworker/11:2+events20:05:123
23076993938,1cyclictest4051012-21kworker/11:2+events19:20:143
23076993937,1cyclictest176554-21kworker/11:0+events00:35:203
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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