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2026-03-10 - 22:59

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 Tue Mar 10, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1148023726,0sleep30-21swapper/306:59:243
1166123521,0sleep00-21swapper/007:01:290
1160023425,0sleep20-21swapper/207:00:432
1139223223,0sleep10-21swapper/106:58:211
117609999,0cyclictest21596-21sensors08:42:080
4160,0ktimersoftd/00-21swapper/011:32:030
339960,0migration/3627-21sh09:54:373
339960,0migration/35827-21sh11:57:383
339960,0migration/35255-21taskset12:17:263
339960,0migration/324358-21sh09:47:303
339960,0migration/322738-21sh11:27:373
339960,0migration/319014-21munin-node07:27:123
339960,0migration/315328-21sh11:45:283
29725060,0irq/27-eth0-tx-27298-21munin-node08:02:000
29725060,0irq/27-eth0-tx-21612-21munin-node08:21:590
29715060,0irq/26-eth0-rx-6547-21yum11:17:113
29715060,0irq/26-eth0-rx-31234-21vmstat10:52:103
29715060,0irq/26-eth0-rx-25890-21diskstats10:31:593
29715060,0irq/26-eth0-rx-24017-21aten2.4-expect11:51:563
29715060,0irq/26-eth0-rx-0-21swapper/311:34:583
29715060,0irq/26-eth0-rx-0-21swapper/310:22:083
149960,0migration/0968-21sh10:16:180
149960,0migration/08030-21sh10:18:180
149960,0migration/013632-21sh12:02:100
117629960,0cyclictest0-21swapper/212:00:092
8215050,0irq/24-0000:00:15775-21crond11:46:462
35150,0ktimersoftd/30-21swapper/309:42:143
339950,0migration/39398-21kthreadcore12:02:033
339950,0migration/38273-21munin-node07:47:023
339950,0migration/37986-21taskset08:11:123
339950,0migration/36038-21kthreadcore08:32:033
339950,0migration/35260-21kthreadcore10:37:063
339950,0migration/35016-21kthreadcore09:37:013
339950,0migration/331682-21kthreadcore08:27:053
339950,0migration/331623-21kthreadcore08:02:043
339950,0migration/329843-21fschecks_time08:51:593
339950,0migration/325553-21cpuspeed_turbos07:11:583
339950,0migration/325217-21fschecks_count11:12:013
339950,0migration/323052-21kthreadcore07:57:053
339950,0migration/318610-21kthreadcore12:07:043
339950,0migration/317712-21latency_hist10:06:473
339950,0migration/316903-21munin-node11:06:573
339950,0migration/316705-21kthreadcore07:52:043
339950,0migration/315674-21runrttasks11:25:213
339950,0migration/314359-21kthreadcore09:02:043
339950,0migration/312292-21kthreadcore10:02:043
339950,0migration/310641-21cpu09:21:583
29725050,0irq/27-eth0-tx-31998-21munin-node07:17:000
29725050,0irq/27-eth0-tx-31567-21ssh10:53:052
29725050,0irq/27-eth0-tx-14909-21ssh11:02:102
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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