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2026-07-24 - 23:37

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 Fri Jul 24, 2026 12:43:22)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
304450970,0irq/25-eth10-21swapper/306:48:143
785523726,0sleep20-21swapper/206:48:362
775223524,0sleep10-21swapper/106:47:231
772223524,0sleep00-21swapper/006:47:060
79519970,0cyclictest0-21swapper/106:59:131
79529960,0cyclictest0-21swapper/211:54:122
79519965,0cyclictest0-21swapper/108:39:101
79519960,0cyclictest6179-21diskmemload10:38:401
339960,0migration/39670-21sh10:50:103
339960,0migration/39547-21sh11:11:343
339960,0migration/39464-21sh11:33:193
339960,0migration/329520-21sh09:22:233
339960,0migration/312926-21sh09:32:153
339960,0migration/31288-21sh11:27:543
29725060,0irq/27-eth0-tx-31127-21munin-node08:19:090
29715060,0irq/26-eth0-rx-22244-21perl09:39:073
29715060,0irq/26-eth0-rx-15010-21cat09:54:083
27160,0ktimersoftd/26179-21diskmemload09:45:272
27160,0ktimersoftd/20-21swapper/207:44:092
19160,0ktimersoftd/10-21swapper/109:45:271
149960,0migration/028505-21kthreadcore12:04:100
149960,0migration/023904-21sh11:39:180
8215050,0irq/24-0000:00:18206-21python10:14:142
8215050,0irq/24-0000:00:12831-21munin-run09:53:532
79529955,0cyclictest0-21swapper/211:04:042
79529953,0cyclictest3556-21lldpd07:43:022
79529950,0cyclictest0-21swapper/210:26:042
79529950,0cyclictest0-21swapper/209:37:502
79519955,0cyclictest0-21swapper/111:41:161
79519955,0cyclictest0-21swapper/110:44:591
79519955,0cyclictest0-21swapper/109:57:031
79519955,0cyclictest0-21swapper/109:04:241
79519955,0cyclictest0-21swapper/107:09:181
79519950,0cyclictest0-21swapper/112:03:581
79519950,0cyclictest0-21swapper/111:37:571
79519950,0cyclictest0-21swapper/109:32:461
79519950,0cyclictest0-21swapper/108:49:441
79499955,0cyclictest0-21swapper/011:54:030
79499954,0cyclictest30119-21awk09:03:530
4150,0ktimersoftd/00-21swapper/010:46:250
35150,0ktimersoftd/30-21swapper/310:46:253
339950,0migration/39980-21kthreadcore08:49:103
339950,0migration/37632-21munin-node09:09:083
339950,0migration/36455-21munin-node12:09:143
339950,0migration/331139-21munin-node08:19:043
339950,0migration/326136-21kthreadcore06:59:133
339950,0migration/326033-21fschecks_time08:39:063
339950,0migration/323534-21aten2.4-expect07:49:053
339950,0migration/322132-21kthreadcore10:19:093
339950,0migration/319606-21timerandwakeup09:34:193
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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