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2026-04-29 - 18:01

OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of shadow in rack #1, slot #2

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.
Unexpectedly long latencies may be caused by SMIs
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 50 highest latencies:
System rack1slot2s.osadl.org (updated Wed Apr 29, 2026 12:43:23)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
305027372,0sleep20-21swapper/206:55:252
304450440,0irq/25-eth10-21swapper/306:57:033
308923321,0sleep00-21swapper/006:55:550
297723324,0sleep10-21swapper/106:54:361
339960,0migration/39731-21munin-node11:22:183
339960,0migration/37989-21sh11:40:303
339960,0migration/327025-21munin-node09:12:183
339960,0migration/326305-21munin-node08:47:243
339960,0migration/325850-21sh09:51:093
339960,0migration/323093-21sh11:48:003
339960,0migration/316636-21kthreadcore08:42:223
32679966,0cyclictest9420-21timerwakeupswit06:57:270
32679960,0cyclictest0-21swapper/010:03:190
29725060,0irq/27-eth0-tx-16961-21munin-node11:27:172
29715060,0irq/26-eth0-rx-9620-21awk10:22:043
29715060,0irq/26-eth0-rx-15130-21awk10:42:233
19160,0ktimersoftd/13081-21mdstat07:17:211
149960,0migration/09159-21sh11:02:060
149960,0migration/08760-21sh11:01:350
149960,0migration/08565-21sh11:21:490
149960,0migration/07306-21sh11:59:320
149960,0migration/026400-21sh09:52:080
339950,0migration/39560-21kthreadcore08:37:203
339950,0migration/39540-21munin-node12:22:203
339950,0migration/37942-21munin-node09:17:253
339950,0migration/35906-21taskset08:08:033
339950,0migration/33060-21latency07:17:203
339950,0migration/32873-21kthreadcore07:42:233
339950,0migration/328461-21kthreadcore10:52:213
339950,0migration/328143-21kthreadcore08:27:213
339950,0migration/32785-21fschecks_count09:37:183
339950,0migration/325494-21fschecks_count11:32:173
339950,0migration/325338-21idleruntime12:12:193
339950,0migration/324050-21munin-node10:07:273
339950,0migration/323331-21latency_hist07:12:043
339950,0migration/321223-21kthreadcore11:27:213
339950,0migration/320051-21kthreadcore10:47:193
339950,0migration/319892-21aten_r1power_cu08:22:143
339950,0migration/319206-21diskmemload09:07:203
339950,0migration/318977-21aten_r1power_vo07:57:163
339950,0migration/317670-21taskset09:24:573
339950,0migration/317555-21kthreadcore08:17:213
339950,0migration/316576-21aten_r1power_fr12:07:163
339950,0migration/31625-21latency_hist08:57:043
339950,0migration/31340-21latency_hist10:37:043
339950,0migration/310344-21munin-node09:02:163
339950,0migration/310066-21latency_hist10:02:043
32709955,0cyclictest0-21swapper/212:12:292
32709955,0cyclictest0-21swapper/210:08:342
32709955,0cyclictest0-21swapper/209:50:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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