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2026-07-02 - 12:09
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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 Thu Jul 02, 2026 00:44:50)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
127774499140130,7cyclictest1370823-40logrotate00:00:000
127774599127114,10cyclictest1213033-21systemd-journal00:30:001
127774599123114,7cyclictest1383629-21latency_hist00:40:001
127774499120110,7cyclictest1335541-21latency_hist22:10:010
127774599118106,9cyclictest1288790-21latency_hist19:45:001
127774499118107,8cyclictest1301786-21latency_hist20:25:010
127774499116110,5cyclictest1330482-21kworker/u8:3+events_unbound22:35:230
127774499115101,12cyclictest1290375-21latency_hist19:50:010
127774499113106,5cyclictest1370889-21kworker/u8:3+flush-179:000:00:150
127774499112105,6cyclictest1308147-21kworker/u8:0+events_unbound21:10:240
12777449910899,4cyclictest1351772-21kworker/u8:3+events_unbound23:30:210
12777449910699,5cyclictest1277028-21kworker/u8:1+events_unbound19:15:170
12777449910696,4cyclictest1297037-21kworker/u8:1+events_unbound20:15:250
127774499105100,4cyclictest1345256-21kworker/u8:1+events_unbound22:55:240
12777459910292,7cyclictest1311331-21latency_hist20:55:011
12777459910195,4cyclictest1330482-21kworker/u8:3+events_unbound22:05:141
12777449910192,6cyclictest1304964-21latency_hist20:35:000
12777449910191,7cyclictest1285595-21latency_hist19:35:010
1277745999990,6cyclictest1298590-21latency_hist20:15:011
1277745999894,3cyclictest1330482-21kworker/u8:3+events_unbound22:40:211
1277745999889,7cyclictest1309746-21latency_hist20:50:011
1277744999791,4cyclictest1300158-21kworker/u8:3+events_unbound20:40:210
1277745999685,9cyclictest1356753-21apt-get23:15:091
1277744999688,6cyclictest1338702-21kworker/u8:1+flush-179:022:20:210
1277744999590,4cyclictest1301821-21kworker/u8:1+events_unbound20:25:180
1277744999586,3cyclictest1308147-21kworker/u8:0+events_unbound21:00:190
1277744999584,8cyclictest1213033-21systemd-journal21:40:010
1277745999490,3cyclictest2872936-21cups-browsed00:00:011
1277745999487,5cyclictest1297004-21latency_hist20:10:001
1277744999490,3cyclictest1325700-21kworker/u8:1+events_unbound21:40:260
1277744999385,6cyclictest1213033-21systemd-journal00:35:000
1277745999281,8cyclictest1338978-21/usr/sbin/munin22:20:231
1277745999185,4cyclictest1304958-21kworker/u8:2+events_unbound20:35:271
1277747999088,1cyclictest0-21swapper/319:40:593
1277746998885,2cyclictest0-21swapper/219:40:592
1277745998777,8cyclictest1350384-21apt-get22:55:111
1277744998783,3cyclictest1367685-21kworker/u8:1+events_unbound23:50:210
1277744998783,3cyclictest1347984-21kworker/u8:0+events_unbound23:25:130
1277744998782,4cyclictest1370889-21kworker/u8:3+events_unbound00:20:260
1277744998782,4cyclictest1330482-21kworker/u8:3+events_unbound22:25:230
1277744998682,3cyclictest1367685-21kworker/u8:1+events_unbound00:35:260
1277744998682,3cyclictest1304469-21kworker/u8:0+flush-179:020:35:220
1277744998681,4cyclictest1370889-21kworker/u8:3+events_unbound00:05:260
1277744998681,4cyclictest1330482-21kworker/u8:3+events_unbound21:59:570
1277744998673,10cyclictest1323712-21apt-get21:30:240
1277745998581,3cyclictest1284042-21kworker/u8:3+events_unbound19:37:091
1277744998576,6cyclictest1319310-21latency_hist21:20:020
1277744998575,4cyclictest1330482-21kworker/u8:3+events_unbound22:40:190
1277745998479,3cyclictest1367685-21kworker/u8:1+events_unbound00:15:171
1277745998376,5cyclictest1313197-21apt-get21:00:111
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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