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2026-03-23 - 06:07
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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 Mon Mar 23, 2026 00:43:34)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
177406827348,7sleep50-21swapper/519:02:175
177405625847,8sleep40-21swapper/419:02:084
1774435994843,4cyclictest2199938-21latency_hist22:23:167
1774435994338,4cyclictest2139662-21latency_hist21:58:167
1774421994240,2cyclictest2417278-21kworker/u16:4+events_unbound23:58:284
177443599400,38cyclictest1797196-21systemd-run19:13:177
17649342393,30sleep70-21swapper/718:58:187
1774426993836,2cyclictest2320896-21kworker/u16:1+events_unbound23:28:435
1774421993836,2cyclictest1883083-21kworker/u16:1+events_unbound20:18:344
24762392370,0chrt2476241-21ssh00:16:387
1774421993634,2cyclictest2126493-21kworker/u16:2+events_unbound21:53:314
1774421993634,2cyclictest1783900-21kworker/u16:4+events_unbound19:18:314
177443599350,33cyclictest5747-21gnome-shell23:15:267
1774435993431,1cyclictest1835329-21latency_hist19:33:167
1774421993331,2cyclictest2417229-21kworker/u16:3+events_unbound00:13:384
1774421993331,2cyclictest2076610-21kworker/u16:4+events_unbound21:38:404
1774421993331,2cyclictest1062586-21kworker/u16:2+events_unbound19:28:314
177411423323,7sleep60-21swapper/619:02:586
1774430993230,2cyclictest2163823-21kworker/u16:0+flush-8:022:24:226
1774421993230,2cyclictest2320896-21kworker/u16:1+events_unbound23:43:424
1774435993131,0cyclictest0-21swapper/721:08:137
1774426993128,2cyclictest1883083-21kworker/u16:1+events_unbound20:08:305
1774421993028,2cyclictest2016047-21kworker/u16:1+events_unbound21:08:444
1774435992928,0cyclictest0-21swapper/721:13:277
1774435992927,1cyclictest2306836-21ssh23:05:187
1774435992925,3cyclictest2392468-21ssh23:42:467
1774435992924,4cyclictest2007258-21latency_hist21:03:167
177443599290,28cyclictest2270254-21ssh22:49:307
1774426992927,2cyclictest2417229-21kworker/u16:3+events_unbound00:08:415
1774426992927,2cyclictest1806755-21kworker/u16:0+flush-8:019:33:325
1774421992927,2cyclictest2163823-21kworker/u16:0+events_unbound23:03:294
1774426992826,2cyclictest2417278-21kworker/u16:4+events_unbound00:28:355
1774426992826,2cyclictest2417278-21kworker/u16:4+events_unbound00:28:355
1774426992826,2cyclictest2076610-21kworker/u16:4+events_unbound22:18:325
1774426992826,2cyclictest1774187-21kworker/u16:3+events_unbound19:08:215
1774421992826,2cyclictest2320896-21kworker/u16:1+events_unbound00:03:444
1774421992826,2cyclictest1883083-21kworker/u16:1+events_unbound20:28:384
1774435992726,0cyclictest0-21swapper/722:54:297
1774435992725,1cyclictest0-21swapper/719:18:427
1774435992722,3cyclictest2092822-21ssh21:38:327
1774421992725,2cyclictest2281946-21kworker/u16:2+events_unbound23:23:334
1774435992626,0cyclictest0-21swapper/723:50:177
1774435992626,0cyclictest0-21swapper/723:50:177
1774435992626,0cyclictest0-21swapper/723:18:497
1774435992624,1cyclictest2150112-21ssh22:00:237
177443599260,25cyclictest5747-21gnome-shell22:11:267
1774426992624,2cyclictest2126493-21kworker/u16:2+events_unbound22:03:315
1774426992624,2cyclictest1987000-21kworker/u16:0+events_unbound20:48:445
1774426992624,2cyclictest1950097-21kworker/u16:3+events_unbound21:13:435
1774426992624,2cyclictest1806755-21kworker/u16:0+events_unbound19:38:315
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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