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2026-04-03 - 18:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #7, slot #7

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 rack7slot7s.osadl.org (updated Fri Apr 03, 2026 12:43:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1742429178,9sleep00-21swapper/007:09:120
1733528758,6sleep10-21swapper/107:08:031
1737328367,12sleep30-21swapper/307:08:333
1714528168,9sleep20-21swapper/207:05:352
17580992714,2cyclictest32-21ksoftirqd/210:00:132
17577992523,1cyclictest0-21swapper/112:36:411
1758599230,2cyclictest0-21swapper/308:10:133
1758599230,20cyclictest0-21swapper/311:44:423
17580992318,2cyclictest32-21ksoftirqd/209:34:072
1758099231,2cyclictest141rcu_preempt11:44:112
1757799221,2cyclictest141rcu_preempt12:13:581
17575992221,1cyclictest0-21swapper/011:37:560
17585992117,2cyclictest12882-21apache_processe09:50:133
1758599210,2cyclictest0-21swapper/311:46:193
1758599210,18cyclictest0-21swapper/310:44:333
17580992016,3cyclictest32-21ksoftirqd/210:14:542
1758099200,19cyclictest0-21swapper/209:15:322
17577992018,1cyclictest284782chrt09:40:021
17585991915,4cyclictest0-21swapper/312:16:123
1758099192,16cyclictest32-21ksoftirqd/211:35:122
1758099191,2cyclictest141rcu_preempt09:50:142
1758099190,0cyclictest0-21swapper/212:28:512
17577991916,2cyclictest25-21ksoftirqd/109:50:181
1757799190,0cyclictest0-21swapper/109:49:101
1757799190,0cyclictest0-21swapper/109:32:261
1757599190,19cyclictest0-21swapper/009:58:090
17585991818,0cyclictest0-21swapper/309:26:133
1758099182,16cyclictest0-21swapper/211:13:242
17580991817,1cyclictest0-21swapper/209:58:242
1758099180,18cyclictest0-21swapper/210:54:192
17577991816,2cyclictest25-21ksoftirqd/111:00:311
1757799180,2cyclictest0-21swapper/111:52:021
1757799180,18cyclictest0-21swapper/111:13:371
17575991813,4cyclictest13-21ksoftirqd/010:27:490
1757599181,1cyclictest0-21swapper/009:45:250
17585991716,1cyclictest39-21ksoftirqd/310:10:273
1758599170,2cyclictest0-21swapper/309:11:513
1758099178,6cyclictest32-21ksoftirqd/211:34:332
17580991713,1cyclictest141rcu_preempt10:23:172
17580991711,5cyclictest14550-21sh09:11:342
1757799170,2cyclictest14135-21ssh10:29:451
1757799170,1cyclictest141rcu_preempt09:27:321
1757799170,17cyclictest0-21swapper/111:20:291
1757799170,16cyclictest0-21swapper/111:15:301
1757599178,8cyclictest18930-21munin-run09:14:590
1757599175,5cyclictest225-21systemd-journal12:09:590
1758599165,4cyclictest5016-21apache211:03:503
1758599160,14cyclictest0-21swapper/309:46:443
1758099164,2cyclictest32-21ksoftirqd/212:09:192
17580991615,1cyclictest32-21ksoftirqd/210:20:012
17580991615,1cyclictest32-21ksoftirqd/210:20:002
17577991616,0cyclictest0-21swapper/111:39:141
17577991615,1cyclictest0-21swapper/109:17:391
1757799160,15cyclictest0-21swapper/110:12:381
1757599160,1cyclictest0-21swapper/010:34:250
1758599152,1cyclictest0-21swapper/312:33:133
1758599152,11cyclictest18157-21apache_processe11:30:123
17585991515,0cyclictest0-21swapper/310:39:103
1758099157,3cyclictest141rcu_preempt12:32:532
1758099152,0cyclictest141rcu_preempt11:27:092
17580991510,1cyclictest32-21ksoftirqd/210:29:032
1757799153,1cyclictest141rcu_preempt10:02:151
17577991514,1cyclictest11877-21kworker/u8:111:34:501
17577991513,1cyclictest0-21swapper/112:17:511
1757799150,14cyclictest0-21swapper/111:45:561
1757599150,9cyclictest10571-21cron09:10:000
1758599141,13cyclictest0-21swapper/310:53:543
17585991411,2cyclictest14484-21cron10:30:003
17585991411,2cyclictest12680-21sort08:05:163
17585991410,3cyclictest28205-21sendmail09:40:003
1758599140,14cyclictest0-21swapper/312:21:583
1758599140,12cyclictest7350-21grep07:55:143
1758099149,3cyclictest9426-21wc10:45:272
17580991413,1cyclictest32-21ksoftirqd/212:10:222
17580991412,2cyclictest17569-21cyclictest09:22:252
17580991412,1cyclictest32-21ksoftirqd/212:22:562
17580991412,1cyclictest32-21ksoftirqd/210:08:152
17580991411,2cyclictest16312-21cut10:30:192
1758099140,2cyclictest0-21swapper/208:25:222
1758099140,2cyclictest0-21swapper/208:25:212
1757799141,1cyclictest25-21ksoftirqd/112:30:121
1757799140,1cyclictest10578-21diskmemload12:08:491
17575991411,2cyclictest4839-21wc09:25:170
1757599141,11cyclictest3985-21runrttasks09:44:550
17575991410,3cyclictest9183-21grep11:05:150
1758599139,3cyclictest19979-21head08:20:163
1758599137,4cyclictest2376-21sh09:24:223
1758599131,2cyclictest0-21swapper/311:35:263
17585991310,2cyclictest27820-21grep07:30:133
17585991310,2cyclictest1987-21cron07:44:593
17585991310,2cyclictest17140-21tr11:10:143
17585991310,2cyclictest1630-21grep11:20:143
17585991310,2cyclictest12229-21tr09:30:133
17585991310,2cyclictest11909-21grep12:05:143
1758599130,12cyclictest0-21swapper/310:55:483
1758599130,12cyclictest0-21swapper/310:15:133
1758599130,12cyclictest0-21swapper/310:15:123
1758099139,3cyclictest660-21cut07:40:172
1758099139,3cyclictest29524-21ssh10:58:032
1758099139,3cyclictest26865-21sh11:54:592
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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