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2026-08-07 - 04:57
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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 rackeslot6.osadl.org (updated Fri Aug 07, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
238715499150135,12cyclictest69-21kswapd021:40:041
238715299128117,8cyclictest2421051-21apt-get20:55:010
238715299128117,8cyclictest2421051-21apt-get20:55:000
238715299127111,9cyclictest2435935-21http21:40:010
238715299125117,6cyclictest2396914-21latency_hist19:40:010
238715499124113,8cyclictest2474601-21latency_hist23:40:011
238715499123103,16cyclictest2487439-21http00:20:011
238715499121114,5cyclictest2431107-21kworker/u8:3+events_unbound21:25:001
238715499120115,4cyclictest2481033-21kworker/u8:0+events_unbound00:04:001
238715499120110,8cyclictest2477790-21latency_hist23:50:011
238715499120106,11cyclictest510-21rs:main1
238715499120106,11cyclictest510-21rs:main1
238715499117109,6cyclictest2398513-21latency_hist19:45:021
238715499117107,7cyclictest2426082-21latency_hist21:10:001
238715499116111,4cyclictest2412877-21kworker/u8:3+flush-179:020:40:231
238715499116111,4cyclictest2387081-21kworker/u8:3+events_unbound19:20:251
238715499116101,6cyclictest2476184-21kworker/u8:2+events_unbound23:50:211
238715499115108,4cyclictest2398549-21kworker/u8:2+events_unbound19:45:221
238715499114100,11cyclictest1213033-21systemd-journal22:30:021
238715499114100,11cyclictest1213033-21systemd-journal22:30:011
238715499110100,7cyclictest2458115-21kworker/u8:0+events_unbound22:50:231
238715499110100,7cyclictest2458115-21kworker/u8:0+events_unbound22:50:231
23871549910997,8cyclictest2411244-21latency_hist20:25:011
23871549910898,7cyclictest2395322-21latency_hist19:35:011
23871549910799,6cyclictest2445744-21kworker/u8:3+events_unbound22:15:031
23871549910698,5cyclictest2421019-21kworker/u8:1+events_unbound20:55:021
23871529910699,5cyclictest2435868-21kworker/u8:1+flush-179:022:25:240
23871529910699,5cyclictest2435868-21kworker/u8:1+flush-179:022:25:240
23871549910592,10cyclictest2429230-21kworker/u8:2+flush-179:021:30:001
23871549910499,4cyclictest2471461-21kworker/u8:1+events_unbound23:55:221
23871549910495,7cyclictest2449410-21apt-get22:20:111
238715499104100,3cyclictest1743101-21kworker/u8:1+flush-179:019:15:281
23871549910297,3cyclictest1743101-21kworker/u8:1+events_unbound19:10:201
23871549910292,8cyclictest2435868-21kworker/u8:1+flush-179:022:10:001
23871549910291,8cyclictest2421019-21kworker/u8:1+events_unbound21:00:201
23871549910287,12cyclictest1213033-21systemd-journal22:50:011
23871529910292,8cyclictest2485798-21latency_hist00:15:010
23871549910194,5cyclictest2461829-21kworker/u8:2+flush-179:023:05:211
23871529910188,10cyclictest1213033-21systemd-journal21:55:010
23871549910095,4cyclictest2391872-21kworker/u8:1+flush-179:020:00:261
23871549910094,4cyclictest2458727-21kworker/u8:1+flush-179:022:55:211
23871529910089,9cyclictest2417616-21apt-get20:44:590
2387154999893,4cyclictest2429230-21kworker/u8:2+flush-179:021:30:241
2387154999889,6cyclictest2397482-21kworker/u8:0+events_unbound19:55:201
2387152999888,6cyclictest2461829-21kworker/u8:2+flush-179:023:00:150
2387152999886,9cyclictest2422956-21kworker/u8:2+flush-179:021:05:160
2387154999793,3cyclictest2461929-21kworker/u8:3+events_unbound23:40:251
2387152999779,15cyclictest2439334-21latency_hist21:50:010
2387154999691,4cyclictest2412871-21kworker/u8:0+flush-179:020:45:271
2387154999688,7cyclictest2390255-21kworker/u8:0+events_unbound19:25:191
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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