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2026-01-05 - 09:45

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.

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 376 highest latencies:
System rack2slot7s.osadl.org (updated Sun Jan 04, 2026 19:55:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
513927996853,11cyclictest818821-21execl17:50:031
513929995243,5cyclictest1369814-21rm18:12:162
513927995040,6cyclictest1328950-21sh18:10:371
513929994941,5cyclictest1314324-21sh18:10:022
513929994840,5cyclictest820399-21fstime17:55:012
513922994841,5cyclictest1384004-21multi.sh18:12:480
513922994839,7cyclictest1274319-21sh18:08:240
513922994834,11cyclictest789736-21tee17:42:220
513927994739,5cyclictest1314506-21sh18:10:031
513927994738,6cyclictest812668-21sh17:43:201
513929994638,5cyclictest788319-21sh17:42:182
513927994637,6cyclictest1391619-21unin-run18:25:011
513929994537,5cyclictest519830-21/usr/sbin/munin17:25:012
513929994436,5cyclictest821875-21fstime17:56:082
513929994436,5cyclictest821875-21fstime17:56:082
513929994434,6cyclictest818819-21execl17:49:502
513929994336,4cyclictest518229-21munin-run17:20:012
513927994333,7cyclictest845911-21spawn18:02:541
513922994337,4cyclictest1395737-21munin-run18:40:010
513922994334,6cyclictest818818-21execl17:49:540
513927994234,5cyclictest0-21swapper/118:40:011
513922994235,4cyclictest737443-21sendmail17:40:010
513927994133,5cyclictest737529-21sh17:40:011
513927994131,7cyclictest822906-21pipe18:00:011
513927994131,7cyclictest822906-21pipe18:00:011
513929994031,6cyclictest563-21avahi-daemon18:30:022
513922994034,4cyclictest823821-21Run18:02:490
513929993933,3cyclictest0-21swapper/217:39:592
513929993931,5cyclictest1393434-21unixbench_multi18:30:032
513929993931,5cyclictest1022112-21spawn18:03:362
513927993931,5cyclictest516806-21xargs17:15:011
513929993827,8cyclictest564-21dbus-daemon17:10:012
513922993832,3cyclictest1390317-21timerandwakeup18:20:020
513927993728,6cyclictest514052-21unixbench_singl17:05:011
513929993628,5cyclictest1395744-21ntp_offset18:40:012
513927993628,5cyclictest819937-21execl17:50:081
513922993627,6cyclictest674869-21sshd17:34:450
513927993529,3cyclictest0-21swapper/117:20:011
513922993529,4cyclictest674-21gdbus17:09:590
513922993527,5cyclictest582-21systemd-logind18:30:020
513922993527,5cyclictest520079-21latency_hist17:25:030
513929993426,5cyclictest521455-21systemctl17:30:012
513927993425,6cyclictest564-21dbus-daemon17:25:011
513922993429,2cyclictest0-21swapper/017:20:010
513922993427,4cyclictest819938-21execl17:50:080
513929993319,10cyclictest646495-21spawn17:34:512
513927993326,3cyclictest0-21swapper/118:20:011
51392799321,26cyclictest686453-21spawn17:34:521
513922993225,4cyclictest1165-21mta-sts-daemon17:56:130
513922993225,4cyclictest1165-21mta-sts-daemon17:56:130
513927993122,6cyclictest514901-21needreboot17:09:501
513929993024,3cyclictest819663-21kworker/u8:7-xprtiod18:20:012
513929993022,5cyclictest1391878-21sed18:25:022
51392799302,23cyclictest588-21gpm18:29:551
51392299301,5cyclictest1391345-21ntpq18:24:560
513929992921,5cyclictest514049-21latency_hist17:05:012
513922992917,4cyclictest516712-21switchtime17:15:010
51392999283,3cyclictest171rcu_preempt17:14:552
513927992820,5cyclictest520326-21unixbench-2d17:25:051
513922992820,6cyclictest513934-21timerwakeupswit17:05:000
513922992722,3cyclictest0-21swapper/017:30:020
513922992720,5cyclictest3402761-21cups-browsed18:35:000
513927992619,4cyclictest0-21swapper/118:34:491
51393199203,12cyclictest0-21swapper/317:57:023
51393199203,12cyclictest0-21swapper/317:57:023
51393199203,10cyclictest0-21swapper/318:04:253
51393199194,10cyclictest0-21swapper/317:49:553
51393199183,8cyclictest0-21swapper/318:10:053
51393199182,6cyclictest0-21swapper/317:24:553
51393199173,9cyclictest0-21swapper/317:39:573
51393199171,7cyclictest0-21swapper/318:34:523
51393199164,8cyclictest0-21swapper/317:40:553
51393199162,8cyclictest0-21swapper/318:30:023
51393199161,8cyclictest0-21swapper/317:29:553
51393199161,7cyclictest0-21swapper/317:14:543
51393199155,8cyclictest0-21swapper/317:53:343
51393199154,5cyclictest0-21swapper/318:25:013
51393199153,7cyclictest0-21swapper/317:34:533
51393199152,9cyclictest0-21swapper/318:10:073
51393199144,7cyclictest0-21swapper/318:20:013
51393199142,6cyclictest0-21swapper/317:19:563
51393199141,6cyclictest0-21swapper/318:39:593
51393199121,7cyclictest0-21swapper/317:05:023
51393199120,8cyclictest0-21swapper/317:10:003
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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