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2026-09-06 - 15:22

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, slot #3

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 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
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rackeslot3s.osadl.org (updated Sun Sep 06, 2026 00:45:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
921614998517,32cyclictest1004091-21latency_hist23:55:020
921616998320,20cyclictest984970-21ssh23:13:411
921616998121,19cyclictest959172-21ssh22:17:251
921616998120,23cyclictest979990-21ssh23:02:351
921616998021,23cyclictest1003509-21ssh23:53:591
921616997927,16cyclictest977638-21ssh22:57:271
921616997927,16cyclictest977638-21ssh22:57:271
921616997822,17cyclictest922847-21munin-run19:35:011
921616997822,17cyclictest922847-21munin-run19:35:011
921614997826,5cyclictest16850irq/134-800000000:00:050
921616997622,17cyclictest986732-21ssh23:17:231
921616997622,17cyclictest986732-21ssh23:17:231
921614997626,13cyclictest947766-21ssh21:52:320
921616997427,14cyclictest992032-21sh23:28:521
921616997422,15cyclictest998438-21ssh23:42:531
921616997421,16cyclictest928902-21ssh21:12:011
921616997421,15cyclictest961552-21ssh22:22:251
921616997419,21cyclictest971332-21ssh22:43:501
921616997419,15cyclictest1007096-21ssh00:01:481
921616997418,22cyclictest938578-21ssh21:32:501
92161499742,37cyclictest939428-21ssh21:34:460
921616997321,16cyclictest1014609-21ssh00:18:411
921616997318,20cyclictest1010397-21ssh00:09:231
92161999721,45cyclictest967262-21ssh22:35:022
921616997217,17cyclictest952045-21ssh22:01:481
921616997131,14cyclictest965988-21ssh22:32:081
921616997129,12cyclictest982151-21ssh23:07:151
921616997122,15cyclictest972901-21ssh22:47:061
921616997120,14cyclictest935326-21ssh21:25:361
921616997120,14cyclictest935326-21ssh21:25:351
921616997118,15cyclictest996852-21ssh23:39:351
921616997117,15cyclictest1022568-21ssh00:35:581
921614997127,10cyclictest934724-21ssh21:24:490
921616997019,15cyclictest940492-21ssh21:36:481
921616997019,15cyclictest940492-21ssh21:36:471
921616997018,18cyclictest950398-21ssh21:58:211
921616997018,15cyclictest964732-21ssh22:29:411
921616997017,15cyclictest957166-21ssh22:13:051
921614997033,28cyclictest981652-21kworker/u8:023:20:020
921614997033,28cyclictest981652-21kworker/u8:023:20:020
921616996921,14cyclictest992756-21sshd23:30:071
921616996920,15cyclictest968972-21ssh22:38:501
921616996918,14cyclictest942958-21ssh21:42:091
921616996917,16cyclictest364-21snmpd22:07:011
921616996917,14cyclictest934638-21ssh21:24:281
921616996821,14cyclictest988374-21ssh23:20:351
921616996819,14cyclictest1004835-21ssh23:56:301
921616996818,14cyclictest922341-21munin-run19:25:001
921616996816,16cyclictest947226-21ssh21:51:141
921614996827,24cyclictest1015177-21ssh00:20:020
921616996720,13cyclictest924950-21date20:15:001
921616996717,15cyclictest1011004-21ssh00:10:221
921616996716,16cyclictest1019597-21ssh00:29:511
921616996716,14cyclictest999946-21ssh23:45:541
921616996716,14cyclictest931282-21ssh21:17:101
921614996711,29cyclictest16850irq/134-800000021:50:020
921616996622,15cyclictest945194-21ssh21:46:591
921616996617,14cyclictest927795-21munin-run21:10:001
921616996615,15cyclictest1015977-21ssh00:21:321
921616996614,15cyclictest976273-21ssh22:54:381
921616996421,14cyclictest0-21swapper/100:33:001
92161499641,4cyclictest0-21swapper/023:15:030
921616996320,15cyclictest924745-21cat20:10:021
921616996040,16cyclictest924397-21sshd20:04:051
921614996039,6cyclictest12-21ksoftirqd/023:58:540
921614996038,19cyclictest0-21swapper/019:15:020
921619995849,6cyclictest926758-21kworker/2:300:03:352
921614995828,14cyclictest964313-21ssh22:28:340
921616995610,14cyclictest0-21swapper/120:26:401
921614995628,12cyclictest976973-21ssh22:55:520
921614995628,12cyclictest976973-21ssh22:55:520
921614995628,12cyclictest971516-21ssh22:44:130
921619995545,6cyclictest926758-21kworker/2:323:20:022
921619995545,6cyclictest926758-21kworker/2:323:20:022
921616995539,13cyclictest3467602-21systemd-journal19:19:491
92161499551,17cyclictest951102-21sendmail22:00:000
921619995445,5cyclictest926758-21kworker/2:300:11:122
921619995444,6cyclictest922305-21kworker/2:021:10:022
921616995438,13cyclictest927215-21sshd20:55:051
921614995428,11cyclictest972764-21ssh22:46:350
92161499542,42cyclictest953974-21ssh22:06:040
92161499541,37cyclictest998268-21ssh23:42:310
921619995344,6cyclictest926758-21kworker/2:323:45:012
921619995344,5cyclictest922305-21kworker/2:021:00:022
921619995335,13cyclictest3467602-21systemd-journal23:00:032
921616995313,11cyclictest926505-21systemd-run20:45:011
921614995343,7cyclictest12-21ksoftirqd/022:23:460
921624995236,13cyclictest978739-21systemctl23:00:003
921624995236,13cyclictest978739-21systemctl23:00:003
921619995244,5cyclictest926758-21kworker/2:321:54:142
921619995244,5cyclictest926758-21kworker/2:321:49:292
921619995242,6cyclictest926758-21kworker/2:300:30:012
921614995230,18cyclictest12-21ksoftirqd/022:35:010
921614995227,9cyclictest1011591-21ssh00:11:550
921614995226,12cyclictest16850irq/134-800000023:36:530
921614995224,13cyclictest931562-21ssh21:17:450
92161499522,36cyclictest151rcuc/021:45:020
921614995214,34cyclictest16850irq/134-800000022:20:020
921614995213,34cyclictest16850irq/134-800000021:10:000
921624995131,16cyclictest275-21dbus-daemon22:10:013
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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