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2026-03-12 - 20:16

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 Thu Mar 12, 2026 12:45:26)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1920980998030,13cyclictest275-21dbus-daemon09:35:021
1920976997832,42cyclictest1922464-21cron07:40:000
1920980997435,12cyclictest3467602-21systemd-journal10:12:321
192098699682,61cyclictest1980622-21ssh11:10:013
1920986996822,40cyclictest3467602-21systemd-journal10:00:003
192098699672,12cyclictest3467602-21systemd-journal10:12:233
192098699671,20cyclictest1995398-21ssh11:42:463
192098699671,20cyclictest1995398-21ssh11:42:463
192098699671,11cyclictest1983485-21sshd11:16:043
1920986996611,51cyclictest1959201-21ssh10:21:133
192098699652,59cyclictest1921468-21munin-run07:20:023
192098699652,17cyclictest1998451-21sh11:49:493
192098699651,4cyclictest1942377-21ssh09:43:553
192098699651,14cyclictest1976687-21ssh11:00:113
1920986996422,38cyclictest1931211-21sh09:18:473
1920986996421,38cyclictest1961290-21sh10:25:483
192098699641,8cyclictest1928020-21ssh09:11:313
192098699641,5cyclictest1966469-21ssh10:37:353
192098699641,16cyclictest1957297-21ssh10:17:093
192098699641,11cyclictest1990438-21ssh11:31:263
192098699632,16cyclictest1972218-21ssh10:50:043
192098699631,21cyclictest1932212-21ssh09:20:443
192098699631,20cyclictest1987604-21ssh11:25:063
192098699631,20cyclictest1937686-21ssh09:33:183
192098699631,17cyclictest1971240-21ssh10:48:173
192098699631,10cyclictest2017145-21ssh12:31:233
192098699631,10cyclictest1951066-21ssh10:03:103
192098699631,10cyclictest1934717-21ssh09:26:263
192098699622,9cyclictest3467602-21systemd-journal11:55:443
192098699622,6cyclictest2007469-21munin-run12:10:013
192098699621,9cyclictest2009916-21ssh12:15:073
192098699621,9cyclictest2009916-21ssh12:15:073
192098699621,9cyclictest1992373-21ssh11:35:533
192098699621,8cyclictest1968379-21ssh10:41:463
1920976996233,9cyclictest2000751-21munin-run11:55:000
192097699621,40cyclictest1921688-21kworker/u8:107:30:030
192098699612,8cyclictest2019508-21ssh12:36:473
192098699612,7cyclictest1981017-21ssh11:10:273
192098699611,9cyclictest1938825-21ssh09:35:373
192098699611,14cyclictest1946833-21ssh09:53:533
192098699611,14cyclictest1946833-21ssh09:53:533
192098699611,10cyclictest2012595-21sshd12:21:113
192098699611,10cyclictest1986573-21ssh11:23:143
192098699602,6cyclictest1952529-21ssh10:06:173
192098699602,54cyclictest2014922-21sh12:26:293
192098699601,8cyclictest1964224-21ssh10:32:363
192098699601,8cyclictest1944505-21ssh09:48:343
192098699601,7cyclictest1998873-21ssh11:50:263
192098699601,5cyclictest2004859-21ssh12:04:073
1920983996049,7cyclictest1906355-21kworker/2:311:39:372
1920976996028,15cyclictest1929278-21ssh09:14:400
192098699592,17cyclictest1974847-21ssh10:56:053
1920983995924,7cyclictest1928028-21sh09:11:322
1920976995928,3cyclictest131rcu_preempt10:41:150
1920976995928,14cyclictest1992555-21ssh11:36:180
192098699582,4cyclictest2007922-21ssh12:10:373
192098699581,14cyclictest1927260-21date09:10:013
192098699572,5cyclictest1924292-21munin-run08:15:013
192098699572,16cyclictest1922470-21munin-run07:40:003
192098699571,4cyclictest1921145-21sshd07:13:203
1920983995750,4cyclictest1927145-21diskmemload11:30:042
1920983995749,5cyclictest1906355-21kworker/2:310:00:062
192097699574,26cyclictest0-21swapper/010:17:510
192097699573,4cyclictest131rcu_preempt12:30:360
1920976995730,11cyclictest2019444-21ssh12:36:380
1920976995729,13cyclictest1950704-21ssh10:02:190
1920976995725,28cyclictest12-21ksoftirqd/012:20:020
1920976995725,28cyclictest12-21ksoftirqd/012:20:020
1920976995724,29cyclictest12-21ksoftirqd/010:51:460
1920976995719,33cyclictest16850irq/134-800000011:19:540
192098699562,6cyclictest364-21snmpd07:27:433
1920976995645,7cyclictest16850irq/134-800000011:05:010
1920976995620,32cyclictest16850irq/134-800000011:14:240
1920976995618,33cyclictest16850irq/134-800000009:25:320
192098699552,6cyclictest1923008-21munin-run07:50:023
192098699551,5cyclictest1925544-21sshd08:35:383
1920976995521,28cyclictest0-21swapper/011:30:030
1920976995520,4cyclictest2005285-21latency_hist12:05:020
1920976995519,32cyclictest16850irq/134-800000011:32:580
1920976995519,32cyclictest16850irq/134-800000009:49:560
1920976995519,31cyclictest16850irq/134-800000009:32:120
1920976995518,6cyclictest16850irq/134-800000010:39:370
192098699542,6cyclictest1923742-21sshd08:00:203
192098699542,4cyclictest1926342-21sshd08:53:203
192098699542,46cyclictest1921053-21grep07:10:023
192098699542,16cyclictest1924028-21munin-run08:10:003
1920983995444,5cyclictest1906355-21kworker/2:307:30:002
1920976995435,16cyclictest12-21ksoftirqd/009:40:020
1920976995426,12cyclictest1963515-21ssh10:30:460
192097699542,44cyclictest0-21swapper/010:23:260
1920976995419,18cyclictest16850irq/134-800000011:48:310
1920976995419,17cyclictest16850irq/134-800000011:09:400
1920976995418,7cyclictest16850irq/134-800000010:11:180
1920976995417,33cyclictest16850irq/134-800000010:07:070
192098699532,5cyclictest1925324-21munin-run08:35:003
192098699532,5cyclictest1925324-21munin-run08:35:003
192098699531,5cyclictest1922210-21munin-run07:35:003
1920986995311,37cyclictest1925061-21cron08:30:003
1920986995311,37cyclictest1925061-21cron08:30:003
192098699531,12cyclictest1926591-21sshd08:58:213
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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