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2026-09-22 - 10:03

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #2, 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 rack2slot7s.osadl.org (updated Tue Sep 22, 2026 00:42:42)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
778320995548,4cyclictest878593-21kworker/u8:3-rpciod23:41:140
778321995344,7cyclictest917986-21kworker/u8:15-xprtiod00:34:041
778321995344,7cyclictest917986-21kworker/u8:15-xprtiod00:34:041
778321995242,6cyclictest869264-21idleruntime-cro22:40:011
778321995242,6cyclictest869264-21idleruntime-cro22:40:011
778320995143,6cyclictest936274-21kworker/u8:6+nfsiod00:34:070
778320995143,6cyclictest936274-21kworker/u8:6+nfsiod00:34:070
778321995040,6cyclictest567-21gdbus23:11:051
778321995040,6cyclictest567-21gdbus23:11:051
778320995041,5cyclictest0-21swapper/021:36:180
778322994739,5cyclictest891175-21aten_r2power_en23:16:062
778321994737,6cyclictest796325-21systemd-run20:10:011
778320994738,6cyclictest1-21systemd21:50:020
778320994637,5cyclictest793333-21systemd-run20:00:010
778321994537,5cyclictest794836-21systemd-run20:05:011
778320994437,4cyclictest803814-21systemd-run20:35:010
778320994437,4cyclictest803814-21systemd-run20:35:010
778322994335,5cyclictest803801-21munin-plugin-st20:35:002
778322994335,5cyclictest803801-21munin-plugin-st20:35:002
77832199433,31cyclictest843237-21ssh21:56:211
778320994324,16cyclictest0-21swapper/023:30:020
77832099431,38cyclictest779279-21sshd19:11:210
77832099431,38cyclictest779279-21sshd19:11:210
778322994234,5cyclictest844909-21ssh22:00:012
778322994232,7cyclictest1-21systemd23:35:022
778321994233,6cyclictest1-21systemd20:30:011
778320994232,4cyclictest806817-21idleruntime-cro20:45:000
778321994131,7cyclictest788827-21sh19:45:011
778320994128,10cyclictest858479-21ntpq22:21:230
77832099412,24cyclictest861422-21ssh22:26:180
778322994032,5cyclictest922192-21needreboot00:06:132
77832099408,23cyclictest840143-21sh21:51:170
778320994029,5cyclictest0-21swapper/022:01:180
778320994029,5cyclictest0-21swapper/022:01:180
778320994025,6cyclictest420-21avahi-daemon21:33:550
77832299393,26cyclictest834029-21ssh21:41:172
778321993931,5cyclictest823502-21cron21:25:001
778321993931,5cyclictest809800-21grep20:55:011
778321993924,12cyclictest934457-21sh00:26:171
77832099399,22cyclictest931381-21ssh00:21:150
778320993932,4cyclictest851027-21systemd-run22:10:010
778320993930,6cyclictest919887-21vmstat00:01:300
778322993831,4cyclictest814305-21diskmemload23:11:102
778322993831,4cyclictest814305-21diskmemload23:11:102
77832299382,28cyclictest928511-21ssh00:16:242
778321993832,3cyclictest0-21swapper/100:00:011
778321993832,3cyclictest0-21swapper/100:00:011
778321993830,5cyclictest910217-21ps23:46:221
77832099383,30cyclictest811300-21idleruntime-cro21:00:010
778320993830,4cyclictest0-21swapper/020:01:220
778320993826,9cyclictest567-21gdbus22:46:150
77832099382,29cyclictest824843-21ssh21:26:180
778320993817,14cyclictest151ktimers/020:51:210
778320993816,15cyclictest0-21swapper/022:31:210
778322993729,5cyclictest878383-21systemd-run22:55:022
778321993729,5cyclictest933191-21cron00:25:011
77832099374,26cyclictest885784-21ssh23:06:200
77832099374,26cyclictest885784-21ssh23:06:200
778320993722,10cyclictest3242255-21cups-browsed23:54:280
778322993628,6cyclictest782834-21true19:25:012
778322993628,5cyclictest863173-21grep22:30:012
778322993628,5cyclictest811281-21cron21:00:012
778322993624,6cyclictest0-21swapper/222:56:202
778321993629,3cyclictest0-21swapper/121:15:021
778321993627,6cyclictest918591-21aten_r2power_en00:01:071
778321993627,5cyclictest1000-21mta-sts-daemon22:06:161
778321993626,7cyclictest879506-21missed_timers22:56:131
77832199362,30cyclictest907062-21ssh23:41:191
778320993630,3cyclictest0-21swapper/022:56:100
778320993629,4cyclictest1000-21mta-sts-daemon22:11:190
778320993629,4cyclictest1000-21mta-sts-daemon22:11:190
778320993628,5cyclictest832753-21kworker/u8:16+xprtiod22:00:010
778320993628,4cyclictest0-21swapper/023:56:170
778320993628,4cyclictest0-21swapper/023:56:170
778320993627,6cyclictest0-21swapper/021:06:180
778320993622,11cyclictest12650irq/32-eth023:01:210
778320993621,10cyclictest870508-21rm22:41:150
778322993524,7cyclictest927268-21latency_hist00:15:022
778321993528,4cyclictest857093-21idleruntime-cro22:20:001
778321993528,4cyclictest847976-21cron22:05:001
778321993528,4cyclictest847976-21cron22:05:001
778321993527,5cyclictest1002-21mta-sts-daemon22:29:401
778321993526,6cyclictest1002-21mta-sts-daemon23:06:111
778321993526,6cyclictest1002-21mta-sts-daemon23:06:111
77832099355,21cyclictest428-21mta-sts-daemon20:26:250
778320993526,5cyclictest0-21swapper/023:40:010
778320993526,5cyclictest0-21swapper/023:40:010
778320993526,4cyclictest0-21swapper/023:46:220
778320993518,13cyclictest0-21swapper/023:11:280
778320993518,13cyclictest0-21swapper/023:11:280
778322993429,2cyclictest0-21swapper/222:25:012
778322993429,2cyclictest0-21swapper/220:20:012
778322993429,2cyclictest0-21swapper/220:01:222
778322993428,3cyclictest0-21swapper/222:15:002
778322993428,3cyclictest0-21swapper/222:15:002
778322993428,3cyclictest0-21swapper/200:36:132
778322993426,5cyclictest894962-21/usr/sbin/munin23:21:232
778322993425,5cyclictest823501-21cron21:25:002
77832199345,18cyclictest428-21mta-sts-daemon22:41:221
778321993427,4cyclictest1000-21mta-sts-daemon19:16:161
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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