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2026-06-15 - 04:51

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 Mon Jun 15, 2026 00:44:04)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2013909994741,4cyclictest335557-21systemd-journal20:25:001
2013910994440,2cyclictest2288292-21gpgv23:35:002
2013907993833,4cyclictest2071182-21diskstats20:05:150
2013909993733,3cyclictest2314597-21kworker/u8:3+flush-259:000:05:001
2013909993528,5cyclictest335557-21systemd-journal22:45:001
2013909993428,4cyclictest2142527-21ntpq21:10:221
2013910993327,4cyclictest2200658-21latency_hist22:10:012
2013909993227,4cyclictest335557-21systemd-journal23:09:341
2013909993127,3cyclictest2236915-21apt-get22:45:111
2013909993027,2cyclictest2081486-21kworker/u8:3+flush-259:020:17:131
2013909993026,3cyclictest2054882-21kworker/u8:0+flush-259:019:55:261
2013910992924,3cyclictest335557-21systemd-journal22:59:332
2013907992922,5cyclictest2349646-21ntpq00:30:210
2013915992823,3cyclictest2262651-21apt-get23:10:093
2013910992824,3cyclictest2054882-21kworker/u8:0+flush-259:019:55:252
2013909992824,3cyclictest2159597-21kworker/u8:0+flush-259:022:35:161
2013909992824,3cyclictest1971476-21kworker/u8:3+flush-259:019:25:221
2013907992824,3cyclictest2159543-21cat21:30:010
2013915992721,4cyclictest335557-21systemd-journal22:00:013
2013909992723,3cyclictest2272977-21apt-get23:20:101
2013909992723,3cyclictest2138214-21kworker/u8:0+flush-259:021:25:011
2013907992722,4cyclictest2204980-21ntpq22:10:210
2013907992721,4cyclictest2292867-21ntpq23:35:200
2013910992620,4cyclictest2350536-21latency_hist00:35:012
2013907992622,3cyclictest2055516-21apt-get19:50:110
2013907992613,12cyclictest2247413-21fschecks_count22:55:140
2013910992522,2cyclictest2180310-21kworker/u8:3+flush-259:021:55:012
2013910992519,4cyclictest2050051-21latency_hist19:45:002
2013907992521,3cyclictest2092059-21kworker/u8:2+flush-259:020:34:590
2013915992421,2cyclictest2159597-21kworker/u8:0+flush-259:022:20:253
2013910992420,3cyclictest2309437-21/usr/sbin/munin23:55:152
2013909992421,2cyclictest2309237-21kworker/u8:2+flush-259:000:15:251
2013907992418,4cyclictest509-21rs:main0
2013915992319,3cyclictest2257271-21kworker/u8:0+flush-259:000:09:593
2013910992319,3cyclictest2231536-21kworker/u8:2+flush-259:023:10:222
2013910992319,3cyclictest2081486-21kworker/u8:3+events_unbound20:15:192
2013910992317,4cyclictest2210969-21latency_hist22:20:012
2013909992319,3cyclictest2314597-21kworker/u8:3+flush-259:000:30:011
2013909992319,3cyclictest2159597-21kworker/u8:0+flush-259:021:50:261
2013909992318,4cyclictest2215221-21ntpq22:20:211
2013909992318,3cyclictest2024454-21/usr/sbin/munin19:20:251
201390799239,2cyclictest2028957-21unixbench_singl19:20:250
2013907992310,1cyclictest0-21swapper/021:30:000
2013915992216,4cyclictest2060430-21latency_hist19:55:013
2013915992215,5cyclictest2169666-21latency_hist21:40:003
2013910992217,3cyclictest2086929-21apt-get20:20:112
2013909992217,4cyclictest2257271-21kworker/u8:0+events_unbound23:40:181
2013909992217,3cyclictest509-21rs:main1
2013907992217,4cyclictest2271794-21ntpq23:15:200
2013907992216,4cyclictest335557-21systemd-journal22:54:590
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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