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2026-04-12 - 13:20
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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 Sun Apr 12, 2026 00:44:52)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121396899127110,14cyclictest1306986-40logrotate00:00:001
12139669910091,6cyclictest1305393-21latency_hist23:55:010
1213968999887,9cyclictest1287299-21kworker/u8:0+flush-179:023:00:011
1213968998668,15cyclictest1225045-21kworker/u8:0+flush-179:019:50:201
1213966998579,4cyclictest1315813-21kworker/u8:0+events_unbound00:35:250
1213966998374,6cyclictest1252315-21kworker/u8:1+flush-179:021:20:210
1213968998172,7cyclictest266-21systemd-journal22:20:001
1213966998173,6cyclictest1276226-21latency_hist22:25:010
1213966998070,7cyclictest1252315-21kworker/u8:1+events_unbound21:10:240
1213968997970,7cyclictest1316869-21latency_hist00:30:011
1213966997972,5cyclictest1268242-21kworker/u8:1+flush-179:022:05:240
1213966997872,4cyclictest1295888-21kworker/u8:3+flush-179:023:55:210
1213968997770,5cyclictest1308657-21latency_hist00:05:011
1213966997769,6cyclictest1246001-21kworker/u8:1+flush-179:021:00:220
1213966997767,7cyclictest1252315-21kworker/u8:1+flush-179:021:15:210
1213966997568,4cyclictest1217717-21kworker/u8:1+events_unbound19:25:150
1213966997567,5cyclictest1225048-21kworker/u8:2+events_unbound20:20:010
1213966997564,9cyclictest1291066-21apt-get23:10:110
1213968997465,6cyclictest1258707-21latency_hist21:30:001
1213966997468,4cyclictest1268306-21kworker/u8:3+events_unbound22:10:150
1213966997267,3cyclictest1213806-21kworker/u8:0+events_unbound19:15:240
1213966997266,5cyclictest1315813-21kworker/u8:0+events_unbound00:30:260
1213966997264,5cyclictest1242579-21kworker/u8:3+events_unbound20:50:000
1213968997165,4cyclictest1252315-21kworker/u8:1+flush-179:021:20:221
1213968997148,20cyclictest1300890-21apt-get23:40:121
1213966997164,5cyclictest1295830-21kworker/u8:2+flush-179:023:30:210
1213966997163,6cyclictest1260294-21latency_hist21:35:010
1213966997163,6cyclictest1213806-21kworker/u8:0+events_unbound19:10:240
1213966997162,6cyclictest1312120-21kworker/u8:3+flush-179:000:20:190
1213968997059,8cyclictest1318466-21latency_hist00:35:021
1213966997058,4cyclictest1225048-21kworker/u8:2+events_unbound19:50:240
1213966996961,5cyclictest1213806-21kworker/u8:0+flush-179:019:30:200
1213968996860,6cyclictest1218643-21latency_hist19:25:021
1213966996861,5cyclictest1268242-21kworker/u8:1+flush-179:022:30:220
1213966996856,10cyclictest1294521-21apt-get23:20:120
121397199670,65cyclictest0-21swapper/223:20:592
1213966996761,4cyclictest1258743-21kworker/u8:2+flush-179:021:35:220
1213966996760,5cyclictest1225048-21kworker/u8:2+flush-179:020:40:230
1213966996759,5cyclictest1284678-21kworker/u8:2+events_unbound22:55:200
1213966996757,7cyclictest1225048-21kworker/u8:2+flush-179:019:45:150
1213968996658,6cyclictest1265075-21latency_hist21:50:011
1213966996660,5cyclictest1225048-21kworker/u8:2+flush-179:020:50:150
1213966996656,7cyclictest1263455-21kworker/u8:0+flush-179:021:45:210
1213968996353,7cyclictest1230032-21/usr/sbin/munin20:00:221
1213968996349,11cyclictest266-21systemd-journal00:20:001
1213966996256,4cyclictest1279640-21kworker/u8:0+flush-179:022:35:220
1213966996254,6cyclictest1303853-21kworker/u8:2+flush-179:000:15:210
1213966996250,4cyclictest1268306-21kworker/u8:3+events_unbound22:00:220
1213968996156,3cyclictest1295830-21kworker/u8:2+flush-179:023:30:241
1213966996156,4cyclictest1290846-21kworker/u8:0+flush-179:023:40:260
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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