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2026-05-02 - 02:18

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 Sat May 02, 2026 00:46:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17244012408388,13sleep30-21swapper/319:05:039
17278992374354,13sleep60-21swapper/619:09:5712
17277562374366,5sleep110-21swapper/1119:08:103
17277822371350,14sleep130-21swapper/1319:08:285
17277592364356,5sleep140-21swapper/1419:08:126
17276462359343,10sleep70-21swapper/719:06:4413
17276582358350,5sleep20-21swapper/219:06:558
17278352357336,14sleep50-21swapper/519:09:0811
17276972352331,14sleep120-21swapper/1219:07:224
17278092351331,13sleep40-21swapper/419:08:5110
17276312349329,13sleep100-21swapper/1019:06:312
17244122349330,12sleep90-21swapper/919:05:1015
17277532348329,12sleep80-21swapper/819:08:0614
17277032347326,14sleep10-21swapper/119:07:261
17275392347325,14sleep150-21swapper/1519:05:327
17275422342322,13sleep00-21swapper/019:05:330
20019282620,0sleep00-21swapper/023:22:110
172841199404,11cyclictest0-21swapper/1420:20:336
172841199393,11cyclictest0-21swapper/1422:43:206
1728409993838,0cyclictest0-21swapper/1323:34:135
1728409993735,2cyclictest1954657-21kworker/u32:3+flush-259:023:00:245
1728411993635,1cyclictest1730713-21kworker/u32:2+events_unbound19:15:016
172841199350,22cyclictest0-21swapper/1419:25:396
172841199350,10cyclictest0-21swapper/1422:10:236
1728388993431,2cyclictest1930686-21kworker/u32:0+events_unbound22:35:1812
172841199339,11cyclictest0-21swapper/1400:22:116
1728411993333,0cyclictest0-21swapper/1421:45:276
1728409993333,0cyclictest0-21swapper/1322:33:425
1728409993330,2cyclictest1830043-21kworker/u32:2+events_unbound21:40:145
172838899330,30cyclictest0-21swapper/619:50:1412
1728384993332,1cyclictest1730713-21kworker/u32:2+flush-259:019:40:4211
1728382993228,4cyclictest1999427-21mii-tool23:20:1510
172838299320,30cyclictest0-21swapper/400:26:1310
172841499310,30cyclictest0-21swapper/1500:01:577
1728411993130,1cyclictest1774-21snmpd22:00:546
1728411993130,1cyclictest1774-21snmpd21:17:536
172840999310,30cyclictest0-21swapper/1320:00:165
1728400993129,1cyclictest1938559-21kworker/10:2+events23:13:362
1728400993129,1cyclictest1938559-21kworker/10:2+events23:13:352
1728400993129,1cyclictest1938559-21kworker/10:2+events22:44:252
1728400993129,1cyclictest1864407-21kworker/10:1+events22:25:172
1728400993129,1cyclictest1864407-21kworker/10:1+events22:09:312
172839399310,30cyclictest0-21swapper/820:10:1014
172839399310,30cyclictest0-21swapper/820:10:0914
1728390993127,4cyclictest1774-21snmpd22:06:3913
172839099310,30cyclictest0-21swapper/720:25:1513
172838899310,30cyclictest0-21swapper/623:31:0212
172838899310,30cyclictest0-21swapper/620:06:1212
172838899310,30cyclictest0-21swapper/620:06:1212
1728384993131,0cyclictest0-21swapper/522:33:4211
1728384993130,1cyclictest2070630-21kworker/5:2-events00:21:5611
1728384993128,1cyclictest1976799-21kworker/5:2-events23:05:0011
172838299310,30cyclictest0-21swapper/423:40:0310
1728377993129,2cyclictest2092193-21ssh00:32:238
172837799310,30cyclictest782-21systemd-journal20:45:418
172837799310,30cyclictest1945334-21ssh22:39:488
172837799310,30cyclictest0-21swapper/223:23:008
172837799310,30cyclictest0-21swapper/223:17:308
172837799310,30cyclictest0-21swapper/223:17:298
172837799310,30cyclictest0-21swapper/223:11:428
172837799310,30cyclictest0-21swapper/223:11:428
172837799310,30cyclictest0-21swapper/222:51:438
172837799310,30cyclictest0-21swapper/222:07:138
172837799310,30cyclictest0-21swapper/221:40:528
172837799310,30cyclictest0-21swapper/221:37:368
172837799310,30cyclictest0-21swapper/221:20:038
172837799310,30cyclictest0-21swapper/221:13:078
172837799310,30cyclictest0-21swapper/220:16:058
172837799310,30cyclictest0-21swapper/220:12:228
172837799310,30cyclictest0-21swapper/220:12:218
172837799310,30cyclictest0-21swapper/219:53:358
172837799310,30cyclictest0-21swapper/219:45:238
172837799310,30cyclictest0-21swapper/219:41:038
172837799310,30cyclictest0-21swapper/219:28:038
1728372993130,1cyclictest1774-21snmpd23:26:121
1728372993130,1cyclictest1774-21snmpd22:32:341
172837299310,30cyclictest0-21swapper/123:31:541
172837299310,30cyclictest0-21swapper/120:54:261
172837299310,30cyclictest0-21swapper/119:30:591
172836899310,30cyclictest0-21swapper/023:08:430
1728414993029,1cyclictest1774-21snmpd22:36:447
1728414993029,1cyclictest1774-21snmpd20:32:157
1728414993029,1cyclictest0-21swapper/1521:45:397
172841199305,25cyclictest0-21swapper/1423:16:176
172841199305,25cyclictest0-21swapper/1423:16:176
172841199305,25cyclictest0-21swapper/1421:59:246
172841199305,25cyclictest0-21swapper/1420:53:306
172841199305,25cyclictest0-21swapper/1420:42:316
172841199305,0cyclictest0-21swapper/1423:49:146
172841199305,0cyclictest0-21swapper/1422:21:226
172841199305,0cyclictest0-21swapper/1421:37:266
172841199304,26cyclictest0-21swapper/1400:33:106
172841199301,29cyclictest1911821-21kworker/14:0-events22:17:186
172841199300,30cyclictest0-21swapper/1400:01:106
172841199300,28cyclictest211rcu_preempt22:55:236
172840999300,30cyclictest0-21swapper/1319:39:145
172840999300,30cyclictest0-21swapper/1300:21:565
1728403993027,3cyclictest1774-21snmpd21:37:513
172840399300,1cyclictest0-21swapper/1100:35:143
172840399300,1cyclictest0-21swapper/1100:08:343
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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