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2025-11-18 - 08:42

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #e, 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.

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 50 highest latencies:
System rackeslot4s.osadl.org (updated Tue Nov 18, 2025 00:44:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
41042993026,3cyclictest123756-21apt-get20:30:002
41039993025,3cyclictest155823-21/usr/sbin/munin21:00:161
41042992823,3cyclictest165892-21latency_hist21:10:012
41049992723,3cyclictest259558-21kworker/u8:4+flush-259:022:40:263
41049992721,4cyclictest176160-21latency_hist21:20:013
41036992623,2cyclictest2159342-21kworker/u8:4+events_unbound19:55:190
41036992621,4cyclictest171433-21diskstats21:15:150
41039992518,5cyclictest2698871-21systemd-journal20:05:001
41049992420,3cyclictest342210-21cp00:00:003
41036992421,2cyclictest192308-21kworker/u8:3+flush-259:021:35:190
41036992420,3cyclictest2159342-21kworker/u8:4+flush-259:019:25:180
41036992420,3cyclictest201991-21kworker/u8:2+events_unbound22:10:180
4103999235,5cyclictest191003-21memory21:30:201
41049992220,1cyclictest0-21swapper/321:55:003
41049992218,3cyclictest3000063-21rs:main3
41039992217,3cyclictest218230-21kworker/u8:3+flush-259:022:35:001
41049992118,2cyclictest92848-21munin-plugin-st20:00:003
41049992118,2cyclictest218230-21kworker/u8:3+flush-259:022:30:183
41042992118,2cyclictest97974-21kworker/u8:1+events_unbound20:05:192
41042992118,2cyclictest97974-21kworker/u8:1+events_unbound20:05:192
41039992118,2cyclictest316439-21cron23:35:001
41036992117,3cyclictest306399-21/usr/sbin/munin23:25:170
41049992017,2cyclictest300663-21gpgv23:20:013
41042992016,3cyclictest348042-21apt-get00:05:122
41036992016,3cyclictest134535-21gpgv20:40:000
41036992015,4cyclictest2698871-21systemd-journal22:09:550
41042991914,4cyclictest373511-21latency_hist00:30:002
4103999194,4cyclictest223230-21modprobe22:03:311
41039991914,3cyclictest342664-21diskstats00:00:151
41036991910,8cyclictest103326-21kworker/u8:2+flush-259:020:45:250
4104999181,5cyclictest577031irqcore19:25:183
41049991815,2cyclictest0-21swapper/321:25:003
41049991814,2cyclictest254854-21irqcore22:35:193
41049991812,4cyclictest40795-21apt-get19:10:023
41049991812,4cyclictest305335-21ntpq23:20:233
41042991815,2cyclictest201991-21kworker/u8:2+flush-259:022:20:002
4103999186,7cyclictest218214-21munin-run22:00:001
41039991815,2cyclictest3000061-21in:imuxsock21:19:591
41039991812,5cyclictest134620-21gpgv20:40:011
4103999181,10cyclictest274778-21munin-run22:55:001
41036991815,2cyclictest2159342-21kworker/u8:4+flush-259:020:00:180
41036991815,2cyclictest0-21swapper/020:15:000
41036991815,2cyclictest0-21swapper/000:05:000
41049991715,1cyclictest0-21swapper/300:30:003
41049991711,4cyclictest383825-21latency_hist00:40:003
41042991715,1cyclictest0-21swapper/200:00:002
41042991713,3cyclictest301208-21kworker/u8:2+flush-259:023:30:262
41042991713,3cyclictest130020-21grep20:35:212
41042991711,4cyclictest2698871-21systemd-journal21:55:002
4103999179,6cyclictest285112-21idleruntime-cro23:05:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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