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2026-08-22 - 02:59

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 Sat Aug 22, 2026 00:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450870,0irq/25-eth10-21swapper/318:43:313
574223525,0sleep20-21swapper/218:45:402
573123422,0sleep10-21swapper/118:45:311
554422622,0sleep00-21swapper/018:43:180
29715070,0irq/26-eth0-rx-16384-21ssh22:32:523
8215060,0irq/24-0000:00:22083-21perf20:11:102
58629960,0cyclictest0-21swapper/100:14:161
58619965,0cyclictest3214-21sh21:26:100
58619960,0cyclictest0-21swapper/023:08:520
339960,0migration/39385-21sh22:08:513
339960,0migration/37224-21sh23:07:293
339960,0migration/323453-21sh23:18:323
339960,0migration/322576-21sh23:37:503
339960,0migration/318503-21sh21:34:073
339960,0migration/311015-21sh21:08:533
339960,0migration/310365-21sh21:49:553
29715060,0irq/26-eth0-rx-9353-21which21:26:323
29715060,0irq/26-eth0-rx-7603-21cat19:56:283
29715060,0irq/26-eth0-rx-0-21swapper/300:02:193
149960,0migration/03813-21kthreadcore23:46:270
149960,0migration/03257-21sh21:04:490
149960,0migration/014098-21sh23:52:420
149960,0migration/01341-21sh21:42:010
58639955,0cyclictest8630-21netstat21:46:292
58639955,0cyclictest0-21swapper/223:01:122
58639955,0cyclictest0-21swapper/222:53:482
58639955,0cyclictest0-21swapper/222:26:032
58639954,0cyclictest7843-21awk00:11:242
58639950,0cyclictest0-21swapper/221:43:382
58639950,0cyclictest0-21swapper/220:47:022
58629955,0cyclictest0-21swapper/122:42:221
58629955,0cyclictest0-21swapper/121:10:081
58629954,0cyclictest23442-21tr19:21:271
58629950,0cyclictest0-21swapper/123:37:131
58629950,0cyclictest0-21swapper/121:52:421
58629950,0cyclictest0-21swapper/121:35:401
58619955,0cyclictest3989-21diskmemload23:21:190
5520250,0sleep08255-21kthreadcore20:46:260
339950,0migration/39344-21kthreadcore18:46:273
339950,0migration/34026-21kthreadcore19:06:273
339950,0migration/329665-21kthreadcore23:21:263
339950,0migration/328873-21kthreadcore19:26:263
339950,0migration/328829-21munin-node19:51:263
339950,0migration/328634-21irqrtprio21:41:273
339950,0migration/328291-21munin-node20:11:323
339950,0migration/325497-21taskset18:57:343
339950,0migration/325079-21taskset21:16:273
339950,0migration/320728-21irqrtprio21:36:263
339950,0migration/317618-21kthreadcore19:41:283
339950,0migration/316734-21kthreadcore20:51:283
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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