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2026-09-04 - 09:25
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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 Sep 04, 2026 00:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
284291899149135,10cyclictest2933514-21latency_hist23:50:000
284292199147121,23cyclictest2950014-21latency_hist00:40:011
284292199146134,8cyclictest2842758-21latency_hist19:10:021
284291899141128,9cyclictest1213033-21systemd-journal23:55:010
284292199139133,4cyclictest2889230-21kworker/u8:1+events_unbound21:50:001
284292199139132,4cyclictest2924968-21kworker/u8:0+flush-179:023:50:271
284292199139126,11cyclictest2892956-21kworker/u8:2+events_unbound22:00:001
284292199136126,8cyclictest1213033-21systemd-journal23:20:001
284291899136125,8cyclictest2927148-21latency_hist23:30:010
284291899133115,13cyclictest2849152-21latency_hist19:30:010
284291899131117,10cyclictest2865875-21kworker/u8:1+flush-179:020:35:220
284292199129121,6cyclictest2889230-21kworker/u8:1+events_unbound22:55:021
284292199129115,5cyclictest2865875-21kworker/u8:1+flush-179:021:05:001
284292199128122,4cyclictest2847602-21kworker/u8:0+flush-179:020:05:251
284292199127122,4cyclictest2938551-21kworker/u8:2+events_unbound00:04:031
284292199127122,4cyclictest2938551-21kworker/u8:2+events_unbound00:04:021
284291899127115,8cyclictest2874911-21kworker/u8:3+flush-179:021:05:240
284292199125112,10cyclictest193509-21cups-browsed00:00:001
284292199125112,10cyclictest193509-21cups-browsed00:00:001
284291899125116,6cyclictest2865875-21kworker/u8:1+flush-179:020:30:010
284292199122117,4cyclictest2889230-21kworker/u8:1+events_unbound21:35:251
284292199122114,5cyclictest2922368-21latency_hist23:15:011
284292199122114,5cyclictest2845933-21kworker/u8:3+flush-179:019:40:261
284292199121115,4cyclictest2924968-21kworker/u8:0+flush-179:000:20:151
284292199121107,11cyclictest1213033-21systemd-journal23:05:001
284291899121110,8cyclictest2889230-21kworker/u8:1+flush-179:022:05:190
284291899121110,8cyclictest2889230-21kworker/u8:1+flush-179:022:05:190
284292199120114,4cyclictest2900942-21kworker/u8:3+events_unbound22:30:181
284292199120112,5cyclictest2919175-21kworker/u8:0+flush-179:023:05:231
284291899119107,8cyclictest2924968-21kworker/u8:0+events_unbound00:10:250
284292199118112,4cyclictest2886051-21kworker/u8:0+flush-179:021:25:281
284292199117109,5cyclictest2845933-21kworker/u8:3+flush-179:019:25:231
284292199117106,8cyclictest2892698-21latency_hist21:45:011
284291899117106,7cyclictest2900942-21kworker/u8:3+flush-179:022:35:000
284292199115106,6cyclictest2857352-21kworker/u8:1+flush-179:019:55:231
284292199115104,7cyclictest2910700-21kworker/u8:0+events_unbound22:40:221
284292199114105,6cyclictest2938551-21kworker/u8:2+events_unbound00:05:201
284291899114104,6cyclictest2865875-21kworker/u8:1+events_unbound20:59:590
284292199112105,5cyclictest2847602-21kworker/u8:0+flush-179:020:10:201
284292199112103,6cyclictest2879942-21kworker/u8:0+events_unbound21:10:211
284291899112104,5cyclictest2847602-21kworker/u8:0+events_unbound19:55:150
28429219911198,11cyclictest2924968-21kworker/u8:0+flush-179:023:45:161
28429219911093,11cyclictest2845933-21kworker/u8:3+events_unbound19:20:251
28429189911099,7cyclictest2889230-21kworker/u8:1+flush-179:022:25:200
284291899110106,3cyclictest2891081-21kworker/u8:0+flush-179:021:50:240
284291899110101,6cyclictest2919175-21kworker/u8:0+flush-179:023:05:120
284292199108101,5cyclictest2865875-21kworker/u8:1+events_unbound20:25:261
28429189910897,8cyclictest2846237-21apt-get19:20:120
28429219910799,5cyclictest2889230-21kworker/u8:1+events_unbound22:15:251
28429219910798,6cyclictest2924968-21kworker/u8:0+events_unbound00:15:251
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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