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2026-07-24 - 15:00
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OSADL QA Farm on Real-time of Mainline Linux

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Default latency plot of system in rack #0, 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 rack0slot2.osadl.org (updated Fri Jul 24, 2026 12:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)		T*(,W**)
latency
(µs)		CmdPIDPrioCmd
40713525419,30sleep70-21swapper/707:08:407
40714225242,7sleep50-21swapper/507:08:465
407486994745,2cyclictest605707-21kworker/u16:4+flush-8:009:23:404
40749999460,44cyclictest440462-21systemd-run07:24:187
40705624131,7sleep40-21swapper/407:07:324
407492994038,2cyclictest125-21kswapd010:54:045
407486993936,2cyclictest633979-21kworker/u16:0+flush-8:010:54:184
40704923929,7sleep60-21swapper/607:07:266
407499993833,4cyclictest963993-21latency_hist11:19:197
407499993832,5cyclictest459854-21latency_hist07:34:197
407494993735,2cyclictest890552-21kworker/u16:4+events_unbound11:14:166
407499993635,0cyclictest0-21swapper/712:16:447
407499993634,1cyclictest644485-21diskmemload11:42:367
407492993633,3cyclictest1049970-21kworker/u16:4+flush-8:011:59:195
407494993533,2cyclictest605707-21kworker/u16:4+events_unbound09:41:066
407486993533,2cyclictest952105-21kworker/u16:0+flush-8:011:14:404
407486993532,2cyclictest656892-21kworker/u16:1+flush-8:011:04:184
407499993432,1cyclictest644485-21diskmemload11:47:137
407494993432,2cyclictest743179-21kworker/u16:3+events_unbound09:58:496
407494993331,2cyclictest915354-21kworker/u16:2+events_unbound11:00:566
407494993331,2cyclictest804603-21kworker/u16:4+events_unbound10:24:456
407494993230,2cyclictest973742-21kworker/u16:3+events_unbound12:09:576
407494993230,2cyclictest656892-21kworker/u16:1+flush-8:009:19:316
407494993230,2cyclictest656892-21kworker/u16:1+events_unbound10:55:326
407494993230,2cyclictest633979-21kworker/u16:0+flush-8:010:31:016
407499993129,1cyclictest586132-21latency_hist08:39:197
407494993129,2cyclictest973742-21kworker/u16:3+flush-8:012:03:216
407494993129,2cyclictest633979-21kworker/u16:0+events_unbound10:35:016
407486993129,2cyclictest131348-21kworker/u16:0+flush-8:007:54:194
407486993129,2cyclictest1049970-21kworker/u16:4+flush-8:012:00:204
407486993127,3cyclictest743179-21kworker/u16:3+events_unbound09:54:474
407499993029,0cyclictest0-21swapper/711:55:287
407499993029,0cyclictest0-21swapper/711:23:297
407499993028,1cyclictest654762-21ssh09:10:537
407499993028,1cyclictest0-21swapper/710:39:217
407499993024,5cyclictest648-21systemd-journal08:09:187
407494993028,2cyclictest865774-21kworker/u16:3+events_unbound10:43:546
407494993027,2cyclictest1022182-21kworker/u16:2+events_unbound11:54:236
407486993028,2cyclictest1049970-21kworker/u16:4+flush-8:012:09:404
407499992927,1cyclictest0-21swapper/712:03:137
407499992927,1cyclictest0-21swapper/711:31:127
407499992927,1cyclictest0-21swapper/711:31:127
407499992926,2cyclictest1086323-21ssh12:08:537
407494992927,2cyclictest567059-21kworker/u16:1+events_unbound08:38:486
407494992927,2cyclictest1049970-21kworker/u16:4+events_unbound12:29:056
407494992927,2cyclictest1049970-21kworker/u16:4+events_unbound12:06:326
8507602280,1sleep50-21swapper/510:29:495
407499992827,0cyclictest0-21swapper/709:49:017
407499992826,1cyclictest913028-21ssh10:55:537
407499992824,2cyclictest518116-21munin-run08:04:187
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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