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2026-06-29 - 17:24

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 100 highest latencies:
System rack0slot4s.osadl.org (updated Mon Jun 29, 2026 00:45:46)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
40542112384365,12sleep130-21swapper/1319:06:475
40544152378356,14sleep90-21swapper/919:09:0815
40542392364357,5sleep140-21swapper/1419:07:056
40525032360340,13sleep40-21swapper/419:05:1710
40542262357336,14sleep60-21swapper/619:06:5612
40541522353347,4sleep70-21swapper/719:06:0913
40541152353333,13sleep80-21swapper/819:05:3814
40543632351331,13sleep150-21swapper/1519:08:267
40542182351332,13sleep10-21swapper/119:06:501
40541682349329,13sleep50-21swapper/519:06:2311
40541042349329,13sleep30-21swapper/319:05:329
40543472348328,13sleep20-21swapper/219:08:128
40541772348328,13sleep100-21swapper/1019:06:282
40541372348328,13sleep110-21swapper/1119:05:573
40544752347327,13sleep00-21swapper/019:09:470
40541202343323,13sleep120-21swapper/1219:05:424
405491099544,25cyclictest206438-21ssh00:19:346
405491099446,25cyclictest0-21swapper/1420:28:556
4054902994343,0cyclictest0-21swapper/1222:29:054
405491099405,10cyclictest0-21swapper/1421:01:526
405487399407,30cyclictest51279-21kworker/u32:2+events_unbound22:21:158
4054875993838,0cyclictest0-21swapper/322:18:059
405488199360,30cyclictest0-21swapper/500:05:4911
4054875993636,0cyclictest0-21swapper/320:21:109
405491099350,10cyclictest0-21swapper/1423:35:386
4054902993535,0cyclictest0-21swapper/1223:32:474
4054902993535,0cyclictest0-21swapper/1221:05:114
4054902993535,0cyclictest0-21swapper/1219:19:114
4054900993525,10cyclictest1774-21snmpd21:20:053
4054902993434,0cyclictest0-21swapper/1220:21:514
4054902993333,0cyclictest0-21swapper/1220:59:584
4054896993330,1cyclictest4188347-21kworker/u32:0+events_unbound22:05:192
405488199330,30cyclictest0-21swapper/522:45:1511
405488199330,30cyclictest0-21swapper/522:45:1511
405488199330,1cyclictest0-21swapper/520:40:4911
405487399333,1cyclictest4166647-21kworker/u32:2+flush-259:021:57:138
4054902993232,0cyclictest0-21swapper/1220:53:584
405490299323,0cyclictest0-21swapper/1223:06:494
4054896993230,2cyclictest4158771-21kworker/u32:1+flush-259:023:50:202
4054896993230,1cyclictest4137678-21kworker/10:2+events22:27:052
4054896993230,1cyclictest217250-21kworker/10:1+events00:35:592
4054896993230,0cyclictest150923-21kworker/10:1+events00:00:172
4054896993229,2cyclictest150923-21kworker/10:1+events23:55:112
405489199320,32cyclictest0-21swapper/822:35:1714
405488199320,1cyclictest0-21swapper/519:30:3211
405488199320,1cyclictest0-21swapper/519:30:3111
405487399320,29cyclictest0-21swapper/223:27:018
405487399320,29cyclictest0-21swapper/222:43:178
405487399320,29cyclictest0-21swapper/222:43:178
405487399320,29cyclictest0-21swapper/222:28:338
405487399320,29cyclictest0-21swapper/222:19:178
405487399320,29cyclictest0-21swapper/222:10:478
405487399320,29cyclictest0-21swapper/222:02:478
405487399320,29cyclictest0-21swapper/221:39:218
405487399320,29cyclictest0-21swapper/221:11:358
405487399320,29cyclictest0-21swapper/220:12:388
405487399320,29cyclictest0-21swapper/220:05:108
405487399320,29cyclictest0-21swapper/219:45:218
405487399320,29cyclictest0-21swapper/219:43:208
405487399320,29cyclictest0-21swapper/219:23:128
405487399320,29cyclictest0-21swapper/200:34:538
405487399320,29cyclictest0-21swapper/200:23:538
405487399320,29cyclictest0-21swapper/200:14:418
405491099310,30cyclictest0-21swapper/1421:24:116
405491099310,30cyclictest0-21swapper/1420:49:136
405491099310,30cyclictest0-21swapper/1419:34:206
405491099310,30cyclictest0-21swapper/1419:34:206
405490599310,30cyclictest0-21swapper/1322:59:565
405490599310,30cyclictest0-21swapper/1319:10:175
4054902993131,0cyclictest0-21swapper/1219:30:484
4054902993131,0cyclictest0-21swapper/1219:30:484
4054902993130,1cyclictest0-21swapper/1220:44:414
405490099310,30cyclictest0-21swapper/1123:59:043
4054896993130,1cyclictest217250-21kworker/10:1+events00:34:152
4054896993129,1cyclictest77703-21kworker/10:1+events23:03:372
4054896993129,1cyclictest4137678-21kworker/10:2+events21:32:472
405489499310,30cyclictest0-21swapper/920:22:4215
405489199310,30cyclictest0-21swapper/823:50:3314
4054881993130,1cyclictest1774-21snmpd23:28:0911
4054879993128,3cyclictest1774-21snmpd20:58:3710
405487999310,30cyclictest0-21swapper/423:51:3110
405487599310,30cyclictest0-21swapper/320:00:249
405487599310,27cyclictest0-21swapper/322:55:149
405487399310,30cyclictest4101691-21perf20:05:008
405487399310,30cyclictest0-21swapper/222:57:058
405487399310,30cyclictest0-21swapper/222:51:298
405487399310,30cyclictest0-21swapper/220:34:308
405487399310,28cyclictest0-21swapper/219:56:068
4054912993029,1cyclictest16302-21ethtool21:50:137
405491299300,29cyclictest0-21swapper/1522:48:597
405491299300,29cyclictest0-21swapper/1522:48:597
405491099300,29cyclictest0-21swapper/1421:07:356
4054905993029,1cyclictest1774-21snmpd22:21:375
4054905993029,1cyclictest1774-21snmpd22:18:555
4054905993029,1cyclictest1774-21snmpd00:21:175
405490599300,29cyclictest0-21swapper/1323:52:195
405490599300,29cyclictest0-21swapper/1300:26:355
4054902993030,0cyclictest0-21swapper/1219:50:404
405490299301,29cyclictest1321ktimers/1221:41:514
405490299300,30cyclictest0-21swapper/1220:47:014
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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