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2026-05-30 - 16:10

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #9, slot #8

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 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: 50 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 highest latencies:
System rack9slot8s.osadl.org (updated Sat May 30, 2026 12:44:21)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
820501530,0irq/47-4a10000015001-21runrttasks07:05:270
15600997545,0cyclictest25165-21sshd11:44:210
15600997458,0cyclictest22250-21latency_hist07:50:040
15600997352,0cyclictest7726-21sshd09:48:210
15600997255,0cyclictest81950irq/46-4a10000011:00:010
15600997156,0cyclictest27458-21kworker/u2:312:35:330
15600997155,0cyclictest9424-21munin-run10:00:010
15600997154,0cyclictest637-21seq09:00:210
15600997154,0cyclictest11071-21runrttasks10:10:260
15600997149,0cyclictest28232-21munin-run12:05:030
15600997149,0cyclictest16327-21munin-run07:15:030
15600997053,0cyclictest9-21ksoftirqd/010:15:350
15600997053,0cyclictest20273-21seq07:37:010
15600997053,0cyclictest17876-21seq07:22:030
15600997048,0cyclictest26496-21sshd08:19:210
15600996941,0cyclictest17502-21munin-run07:20:010
15600996854,0cyclictest26176-21kworker/u2:008:20:490
15600996851,0cyclictest8682-21/usr/sbin/munin09:55:020
15600996851,0cyclictest4980-21awk09:30:010
15600996850,0cyclictest25116-21munin-run08:10:010
15600996848,0cyclictest31255-21apt-get08:50:370
15600996836,0cyclictest28490-21apt-config12:05:100
15600996751,0cyclictest25667-21seq08:13:380
15600996751,0cyclictest21794-21kworker/u2:511:40:030
15600996750,0cyclictest21392-21runrttasks11:19:010
15600996749,0cyclictest10085-21runrttasks10:04:220
15600996737,0cyclictest10256-21runrttasks10:05:040
15600996653,0cyclictest18975-21kworker/u2:208:33:110
15600996651,0cyclictest1993-21apt09:10:010
15600996650,0cyclictest81950irq/46-4a10000008:30:020
15600996650,0cyclictest30650-21munin-run12:20:020
15600996648,0cyclictest17080-21munin-run10:50:020
15600996647,0cyclictest15591-21plymouth10:40:010
15600996646,0cyclictest2772-21latency_hist09:15:020
15600996645,0cyclictest29899-21idleruntime-cro12:15:000
15600996644,0cyclictest31258-21munin-run08:50:040
15600996634,0cyclictest14501-21sshd10:32:220
15600996551,0cyclictest29277-21kworker/u2:108:37:250
15600996551,0cyclictest26328-21kworker/u2:211:56:270
15600996550,0cyclictest14108-21munin-run10:30:010
15600996549,0cyclictest81950irq/46-4a10000009:35:020
15600996548,0cyclictest11657-21sshd11:06:260
15600996547,0cyclictest3633-21runrttasks09:20:140
15600996546,0cyclictest31406-21munin-run12:25:020
15600996545,0cyclictest19726-21munin-run07:35:020
15600996543,0cyclictest23629-21munin-run08:00:030
15600996449,0cyclictest20388-21kworker/u2:211:15:000
15600996447,0cyclictest6457-21munin-run09:40:010
15600996447,0cyclictest23324-21runrttasks11:31:310
15600996447,0cyclictest15715-21modprobe10:40:030
15600996446,0cyclictest22930-21sshd11:29:210
15600996446,0cyclictest22149-21munin-run07:50:010
15600996446,0cyclictest19318-21munin-run11:05:020
15600996445,0cyclictest7214-21munin-run09:45:020
15600996443,0cyclictest3135-21seq09:17:210
15600996435,0cyclictest459-21cron09:00:000
15600996433,0cyclictest17809-21kworker/u2:007:30:000
15600996347,0cyclictest30522-21munin-run08:45:010
15600996345,0cyclictest32612-21seq12:33:000
15600996345,0cyclictest22297-21munin-run11:25:010
15600996335,0cyclictest17811-21sh10:55:010
15600996244,0cyclictest12807-21runrttasks10:20:350
15600996243,0cyclictest26736-21munin-run11:55:010
15600996243,0cyclictest21417-21munin-run07:45:000
15600996145,0cyclictest25997-21apt11:50:010
15600996040,0cyclictest23788-21sshd08:00:210
15600996039,0cyclictest32139-21idleruntime-cro12:30:000
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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