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2025-12-18 - 14:29

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 Thu Dec 18, 2025 12:44:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
292195221790,3sleep3575-21kworker/3:2+events07:29:063
30627692750,3chrt575-21kworker/3:2-events09:50:013
29310412680,4sleep3575-21kworker/3:2-events07:39:053
32296322670,2sleep3481ktimers/312:39:043
2902620995543,9cyclictest278-21systemd-journal11:49:040
2902620995543,9cyclictest278-21systemd-journal11:49:040
2902622995242,8cyclictest278-21systemd-journal07:55:011
31605222510,4chrt0-21swapper/011:29:080
30842822480,3chrt3084285-21kthreadcore10:14:050
2902620994738,6cyclictest3171173-21latency_hist11:40:000
2902620994718,19cyclictest0-21swapper/008:39:040
2902620994714,22cyclictest0-21swapper/011:59:040
2902622994623,10cyclictest278-21systemd-journal08:29:041
2902620994515,20cyclictest0-21swapper/007:29:000
2902620994424,13cyclictest161rcu_preempt08:54:060
290262099431,31cyclictest3171417-21sshd11:40:050
290262099419,24cyclictest3146002-21ntpq11:14:130
2902620994113,19cyclictest0-21swapper/007:35:000
290262099411,27cyclictest3073056-21apt-get10:03:560
290262099399,22cyclictest2943889-21sed07:49:180
290262099399,19cyclictest0-21swapper/008:34:070
290262099396,24cyclictest576-21runrttasks09:17:110
2902620993923,14cyclictest2949052-21cron07:55:000
2902620993922,15cyclictest3141571-21unixbench_singl11:09:170
2902620993922,15cyclictest0-21swapper/007:15:050
2902622993831,5cyclictest2939666-21kworker/u8:3+flush-8:008:09:091
2902622993828,7cyclictest3097638-21/usr/sbin/munin10:29:081
290262099384,24cyclictest576-21runrttasks07:38:570
290262099382,23cyclictest0-21swapper/008:00:150
2902620993810,19cyclictest0-21swapper/012:38:550
290262099380,26cyclictest3043498-21apt-get09:33:570
31318122370,18sleep20-21swapper/211:00:012
2902622993729,6cyclictest3166244-21sh11:35:001
290262099376,23cyclictest0-21swapper/007:40:090
290262099374,23cyclictest0-21swapper/009:09:120
290262099371,25cyclictest2974682-21if_enp4s0.308:23:590
2902620993711,18cyclictest0-21swapper/009:03:340
2902620993710,19cyclictest0-21swapper/008:43:320
2902622993632,3cyclictest2897815-21kworker/u8:1+flush-8:007:30:361
290262099367,20cyclictest0-21swapper/010:45:300
290262099367,17cyclictest3126525-21unixbench_singl10:54:160
290262099360,22cyclictest3071875-21ntpq09:59:090
290262099354,18cyclictest3033647-21cpuspeed09:23:590
290262099352,22cyclictest0-21swapper/011:23:490
290262099352,22cyclictest0-21swapper/010:15:570
290262099352,21cyclictest0-21swapper/008:12:190
2902620993515,17cyclictest3062640-21latency_hist09:50:010
290262099351,31cyclictest3112573-21/usr/sbin/munin10:43:580
2902620993513,12cyclictest0-21swapper/010:25:000
2902620993513,12cyclictest0-21swapper/010:25:000
290262099350,25cyclictest576-21runrttasks12:10:160
290262099350,25cyclictest576-21runrttasks07:23:320
290262099350,23cyclictest576-21runrttasks08:05:290
2902622993429,3cyclictest3113194-21irqrtprio10:44:031
290262099347,20cyclictest576-21runrttasks12:30:060
290262099342,21cyclictest0-21swapper/011:33:440
2902620993421,11cyclictest3008126-21kworker/u8:3+flush-8:010:39:050
290262099341,23cyclictest576-21runrttasks07:58:230
2902620993410,21cyclictest3181909-21grep11:54:010
28978762344,9sleep20-21swapper/207:05:542
2902622993328,3cyclictest411-21dbus-daemon11:05:001
2902622993328,3cyclictest2973690-21systemd-run08:20:001
290262099332,21cyclictest0-21swapper/008:47:090
290262099332,20cyclictest0-21swapper/009:29:590
290262099332,20cyclictest0-21swapper/007:10:320
2902620993317,14cyclictest0-21swapper/011:19:160
2902620993316,15cyclictest3131618-21systemd-run11:00:000
2902620993314,17cyclictest411-21dbus-daemon09:15:010
290262099331,24cyclictest576-21runrttasks10:28:240
29559022320,5sleep20-21swapper/208:04:032
2902622993227,3cyclictest2914120-21unixbench_multi07:19:131
2902622993223,7cyclictest3150934-21ntpq11:19:141
2902620993227,3cyclictest3195810-21gpgv12:05:010
290262099322,20cyclictest0-21swapper/010:33:100
2902620993217,13cyclictest3221077-21latency_hist12:30:010
290262099321,25cyclictest3008739-21apt-get08:58:550
290262099321,25cyclictest3008739-21apt-get08:58:550
290262099321,21cyclictest0-21swapper/009:54:180
290262099320,20cyclictest3132154-21apt-get11:03:580
290262099320,19cyclictest3196404-21runrttasks12:07:030
290262099320,19cyclictest3080140-21sort10:09:040
2902622993126,3cyclictest3178797-21kthreadcore11:49:061
2902622993126,3cyclictest3178797-21kthreadcore11:49:061
290262099312,21cyclictest0-21swapper/012:21:550
2902620993114,15cyclictest0-21swapper/009:44:070
290262099311,19cyclictest576-21runrttasks09:35:080
290262099310,22cyclictest576-21runrttasks08:26:230
290262099310,17cyclictest3210384-21mailstats12:19:140
28980912314,9sleep10-21swapper/107:08:421
2902622993026,3cyclictest3008126-21kworker/u8:3+flush-8:010:20:201
2902622993026,3cyclictest3008126-21kworker/u8:3+flush-8:010:20:201
2902622993026,2cyclictest3053593-21cpuspeed_turbos09:43:581
2902622993024,4cyclictest3161573-21kworker/u8:1-ext4-rsv-conversion12:15:001
2902622993024,4cyclictest3019508-21sed09:09:031
2902622993024,4cyclictest3008126-21kworker/u8:3+flush-8:009:04:161
2902622993023,5cyclictest3062885-21kworker/u8:1+flush-8:010:05:051
2902622993020,7cyclictest3200950-21latency_hist12:10:011
2902622993018,9cyclictest3215742-21apt-get12:25:011
2902620993016,12cyclictest0-21swapper/008:18:590
2902626992924,3cyclictest3225680-21unixbench_multi12:34:142
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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