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2026-09-19 - 11:05

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #5, 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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  Intel
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, lowest P state: ondemand
Compare latency of primary with shadow system
Characteristics of the 100 highest latencies:
System rack5slot4s.osadl.org (updated Sat Sep 19, 2026 00:44:14)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
409661321780,3sleep375-21kworker/3:1+events20:19:053
406100821760,2sleep3481ktimers/319:40:013
1248012780,2sleep3481ktimers/323:59:173
4029158995949,7cyclictest95399-21latency_hist23:30:010
4029166995850,6cyclictest70975-21/usr/sbin/munin23:09:151
4029166995845,11cyclictest278-21systemd-journal21:45:001
4029158995546,6cyclictest4028987-21latency_hist19:10:020
4029166995443,8cyclictest4160360-21latency_hist21:20:011
4029158995145,4cyclictest4029283-21kworker/u8:1+flush-8:019:20:010
4029158995042,6cyclictest4125507-21latency_hist20:45:010
4029158994940,7cyclictest120127-21latency_hist23:55:010
4029158994740,5cyclictest278-21systemd-journal20:29:460
40827962460,1chrt4082801-21kthreadcore20:04:061
4029158994640,4cyclictest1-21systemd00:10:000
4029158994433,7cyclictest278-21systemd-journal20:10:000
4029166994335,6cyclictest4041485-21apt-get19:23:571
4029166994326,15cyclictest4106220-21/usr/sbin/munin20:29:151
4029166994324,16cyclictest4170251-21latency_hist21:30:011
4029166994233,7cyclictest60587-21latency_hist22:55:011
4029158994234,6cyclictest159674-21latency_hist00:35:020
4029158994234,6cyclictest115188-21latency_hist23:50:010
915472410,1chrt91546-21awk23:29:061
4029166994133,6cyclictest4140544-21latency_hist21:00:011
4029158994137,3cyclictest4061184-21kworker/u8:2+flush-8:020:14:150
4029166994032,6cyclictest278-21systemd-journal23:05:001
4029166994023,14cyclictest278-21systemd-journal19:38:281
4029166993930,7cyclictest16358-21apt-get22:13:591
4029166993920,17cyclictest4115035-21ntpq20:34:121
4029166993920,17cyclictest4115035-21ntpq20:34:121
4029166993821,15cyclictest105295-21cron23:40:001
4029166993821,15cyclictest105295-21cron23:40:001
4029166993819,17cyclictest65528-21systemd-run23:00:011
4029166993819,17cyclictest130069-21sh00:05:011
4029158993833,4cyclictest55639-21kworker/u8:0+flush-8:023:59:150
4029158993832,4cyclictest278-21systemd-journal23:15:000
4029166993730,5cyclictest21345-21apt-get22:18:591
4029166993728,6cyclictest4040258-21ntpq19:19:101
4029166993724,11cyclictest4150505-21systemd-run21:10:011
4029166993721,14cyclictest0-21swapper/120:50:011
4029166993719,16cyclictest4105558-21unixbench_multi20:24:171
4029166993718,17cyclictest0-21swapper/122:48:271
4029166993717,2cyclictest0-21swapper/121:14:161
4029158993730,5cyclictest4061184-21kworker/u8:2+events_unbound22:05:000
4029158993728,7cyclictest4061184-21kworker/u8:2+flush-8:022:09:170
4029158993728,7cyclictest4061184-21kworker/u8:2+flush-8:022:09:160
402915899371,34cyclictest1-21systemd19:15:010
715142360,3sleep20-21swapper/223:09:052
40754702360,2sleep2371rcuc/219:54:162
4029166993620,14cyclictest85290-21sendmail23:20:001
4029166993619,15cyclictest39976-21ntp_kernel_pll_22:34:121
4029166993617,17cyclictest20865-21cron19:55:001
4029166993614,5cyclictest0-21swapper/122:09:061
4029166993614,5cyclictest0-21swapper/122:09:061
4029158993630,4cyclictest4155260-21grep21:14:180
4029158993627,6cyclictest278-21systemd-journal22:45:010
4029166993526,6cyclictest4164694-21ntpq21:24:101
4029166993519,3cyclictest100205-21unixbench_multi23:34:171
4029166993519,14cyclictest0-21swapper/119:43:591
4029166993517,2cyclictest0-21swapper/119:34:041
4029166993516,2cyclictest0-21swapper/122:04:071
4029166993516,2cyclictest0-21swapper/121:59:141
4029166993516,2cyclictest0-21swapper/120:39:011
4029166993516,10cyclictest278-21systemd-journal21:05:001
4029158993528,5cyclictest4061184-21kworker/u8:2+flush-8:022:29:150
4029166993417,2cyclictest0-21swapper/122:44:111
4029166993416,3cyclictest0-21swapper/120:19:091
4029166993416,2cyclictest0-21swapper/123:14:141
4029166993415,3cyclictest0-21swapper/123:53:581
4029166993415,2cyclictest0-21swapper/123:24:011
4029166993415,2cyclictest0-21swapper/100:23:591
4029166993414,6cyclictest4174515-21ntpq21:34:081
4029166993414,4cyclictest0-21swapper/120:14:151
4029166993414,4cyclictest0-21swapper/100:39:171
4029166993413,5cyclictest0-21swapper/100:19:111
4029158993427,5cyclictest110075-21grep23:44:190
4029158993426,6cyclictest75399-21kworker/u8:3+flush-8:023:38:580
4029158993426,6cyclictest75399-21kworker/u8:3+flush-8:023:38:580
4029158993425,7cyclictest4060322-21ntpq19:39:110
4029166993318,13cyclictest0-21swapper/119:30:001
4029166993313,4cyclictest0-21swapper/122:28:591
4029166993312,5cyclictest0-21swapper/100:14:001
4029166993312,3cyclictest0-21swapper/121:45:281
40244762334,9sleep20-21swapper/219:06:502
4029166993216,3cyclictest4033619-21mailstats19:14:151
4029166993216,3cyclictest154654-21unixbench_singl00:29:171
4029166993212,7cyclictest1135-21sed21:55:011
4029158993222,8cyclictest4135017-21ntpq20:54:120
4029166993125,4cyclictest95925-21kworker/u8:1+flush-8:023:44:041
4029158993127,3cyclictest4085909-21kworker/u8:3+flush-8:020:34:010
4029158993127,3cyclictest4085909-21kworker/u8:3+flush-8:020:34:010
4029158993127,3cyclictest4029283-21kworker/u8:1+flush-8:021:34:010
4029158993122,6cyclictest278-21systemd-journal00:25:000
4029158993121,7cyclictest20785-21latency_hist22:15:000
402916699305,5cyclictest0-21swapper/120:51:431
402916699302,11cyclictest110783-21apt-get23:49:001
4029158993025,3cyclictest4061184-21kworker/u8:2+flush-8:022:21:320
4029158993024,4cyclictest55639-21kworker/u8:0+events_unbound00:14:160
4029158993022,6cyclictest4085670-21ls20:05:000
4029158993021,7cyclictest81148-21diskstats23:19:030
4029171992924,4cyclictest4160304-21kworker/u8:3+flush-8:021:19:572
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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