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2026-05-14 - 13:16

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #0, slot #6

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 100 highest latencies:
System rack0slot6s.osadl.org (updated Thu May 14, 2026 00:45:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
38392742251245,4sleep60-21swapper/619:07:2316
38394002243235,5sleep50-21swapper/519:08:4315
38362092241221,12sleep140-21swapper/1419:05:116
38394202239231,5sleep10-21swapper/119:08:591
38392332231211,12sleep150-21swapper/1519:06:527
38394072229210,12sleep100-21swapper/1019:08:482
38394492228215,8sleep20-21swapper/219:09:2012
38394162228208,12sleep190-21swapper/1919:08:5711
38394422227208,12sleep160-21swapper/1619:09:148
38392712226218,5sleep30-21swapper/319:07:2013
38391772226207,12sleep130-21swapper/1319:06:105
38391752226207,12sleep110-21swapper/1119:06:083
38393802221201,12sleep120-21swapper/1219:08:304
38392372221202,12sleep180-21swapper/1819:06:5510
38358772219199,12sleep40-21swapper/419:05:0114
38394992218211,4sleep80-21swapper/819:09:4618
38393412217199,11sleep70-21swapper/719:08:0417
38362042217196,13sleep90-21swapper/919:05:0619
38392862212193,12sleep170-21swapper/1719:07:349
38394182202183,12sleep00-21swapper/019:08:580
383991199726,29cyclictest0-21swapper/1423:26:556
38988412410,1sleep135-21ksoftirqd/120:15:231
383989599350,0cyclictest0-21swapper/921:09:5919
3839928993333,0cyclictest0-21swapper/1919:31:5911
383991199330,33cyclictest0-21swapper/1420:34:596
3839902993331,1cyclictest1700471-21CPU3
3839902993331,1cyclictest1700471-21CPU3
3839906993232,0cyclictest0-21swapper/1222:11:594
3839906993232,0cyclictest0-21swapper/1222:11:594
3839921993131,0cyclictest0-21swapper/1719:31:589
3839895993131,0cyclictest0-21swapper/920:18:5919
3839883993131,0cyclictest0-21swapper/623:04:5916
3839879993131,0cyclictest0-21swapper/520:06:5915
3839919993030,0cyclictest0-21swapper/1619:16:598
3839906993030,0cyclictest0-21swapper/1221:30:594
3839869993030,0cyclictest0-21swapper/222:09:5912
3839869993030,0cyclictest0-21swapper/222:09:5912
3839925992929,0cyclictest0-21swapper/1800:30:5910
3839883992929,0cyclictest0-21swapper/620:34:5916
3839879992929,0cyclictest0-21swapper/522:36:5915
3839909992828,0cyclictest0-21swapper/1321:09:595
3839921992727,0cyclictest0-21swapper/1720:56:599
383991999270,1cyclictest0-21swapper/1621:48:428
383991599270,16cyclictest0-21swapper/1522:55:597
3839906992727,0cyclictest0-21swapper/1219:30:594
3839890992727,0cyclictest0-21swapper/819:39:5918
3839890992725,1cyclictest1700472-21CPU18
3839875992727,0cyclictest0-21swapper/421:27:5914
3839873992727,0cyclictest0-21swapper/322:45:5913
383991999267,5cyclictest1700471-21CPU8
3839883992626,0cyclictest0-21swapper/620:36:5916
3839919992524,1cyclictest1701rcuc/1622:10:008
3839919992524,1cyclictest1701rcuc/1622:10:008
383989599252,21cyclictest1700471-21CPU19
3839890992525,0cyclictest0-21swapper/821:00:5918
3839928992422,1cyclictest1700471-21CPU11
3839928992420,2cyclictest1700472-21CPU11
383992899241,22cyclictest1700472-21CPU11
383991999247,3cyclictest1700471-21CPU8
383990699241,22cyclictest1700471-21CPU4
3839895992424,0cyclictest0-21swapper/923:04:5919
3839895992421,2cyclictest1700472-21CPU19
383989599241,2cyclictest1700472-21CPU19
383989599241,2cyclictest1700472-21CPU19
383989599241,1cyclictest1700471-21CPU19
383989599240,22cyclictest1700471-21CPU19
3839890992424,0cyclictest0-21swapper/820:12:5918
3839869992424,0cyclictest0-21swapper/222:11:5412
3839869992424,0cyclictest0-21swapper/222:11:5412
3839865992423,1cyclictest1700413-21qemu-system-x8600:30:591
383992899231,21cyclictest1700471-21CPU11
383992899230,22cyclictest1700472-21CPU11
383992899230,0cyclictest0-21swapper/1920:49:5911
3839919992323,0cyclictest0-21swapper/1619:11:008
383991199230,22cyclictest1700472-21CPU6
3839909992323,0cyclictest0-21swapper/1320:18:595
3839895992321,1cyclictest1700472-21CPU19
383989099230,22cyclictest4034757-21latency_hist23:00:0018
383987999230,1cyclictest1700472-21CPU15
383987599233,19cyclictest0-21swapper/419:11:0114
383987599230,22cyclictest0-21swapper/419:31:5914
3839928992219,2cyclictest1700472-21CPU11
383992899220,21cyclictest4000919-21latency_hist22:20:0011
383992899220,21cyclictest1976-21nessusd21:45:0911
383992899220,21cyclictest1700472-21CPU11
383992899220,21cyclictest1700471-21CPU11
3839925992222,0cyclictest0-21swapper/1822:09:5910
3839925992222,0cyclictest0-21swapper/1822:09:5910
383992199221,2cyclictest1700472-21CPU9
3839919992221,1cyclictest0-21swapper/1621:27:598
383991999220,0cyclictest0-21swapper/1622:14:598
383991999220,0cyclictest0-21swapper/1622:14:598
3839915992219,2cyclictest1700471-21CPU7
383991199221,19cyclictest1700471-21CPU6
383990699220,21cyclictest0-21swapper/1220:56:594
3839895992219,2cyclictest1700471-21CPU19
3839895992219,2cyclictest1700471-21CPU19
3839890992222,0cyclictest0-21swapper/823:04:5918
3839890992222,0cyclictest0-21swapper/821:27:2518
3839890992222,0cyclictest0-21swapper/821:09:5918
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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