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2026-08-22 - 08:56
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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 Sat Aug 22, 2026 00:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
115063899154140,10cyclictest1226675-21latency_hist23:05:000
115064199145126,16cyclictest1244443-21apt-get00:00:001
115063899145133,8cyclictest1184223-21latency_hist20:55:010
115064199139129,8cyclictest1213033-21systemd-journal21:40:001
115063899136121,10cyclictest1191126-21apt-get21:15:000
1150638991321,127cyclictest1-21systemd21:40:000
115064199130121,6cyclictest1178111-21kworker/u8:1+flush-179:021:10:001
115064199130118,8cyclictest1242846-21latency_hist23:55:011
115064199127116,8cyclictest1147547-21kworker/u8:1+flush-179:019:20:181
115064199125115,7cyclictest1217112-21latency_hist22:35:011
115063899124116,5cyclictest1196189-21kworker/u8:3+flush-179:022:10:150
115063899121110,9cyclictest1244510-21kworker/u8:3+events_unbound00:00:020
115063899120112,6cyclictest1196189-21kworker/u8:3+flush-179:022:10:010
115064199119108,8cyclictest1244510-21kworker/u8:3+flush-179:000:30:151
115063899119110,6cyclictest1166496-21kworker/u8:3+flush-179:020:45:150
115063899119110,6cyclictest1166496-21kworker/u8:3+flush-179:020:45:150
115064199115105,7cyclictest1247937-21kworker/u8:1+flush-179:000:35:231
115063899113106,4cyclictest1166496-21kworker/u8:3+events_unbound20:20:010
115063899109101,6cyclictest1196189-21kworker/u8:3+flush-179:021:30:260
11506419910898,8cyclictest1220342-21kworker/u8:2+flush-179:023:40:191
11506419910894,11cyclictest1213033-21systemd-journal23:05:001
11506419910793,11cyclictest1213033-21systemd-journal00:05:001
11506419910696,8cyclictest1220342-21kworker/u8:2+flush-179:023:50:001
11506419910693,11cyclictest1213033-21systemd-journal23:15:011
11506419910693,11cyclictest1213033-21systemd-journal23:15:001
115064199106100,4cyclictest1200937-21latency_hist21:45:011
11506389910598,5cyclictest1243515-21kworker/u8:0+flush-179:000:05:220
11506389910396,5cyclictest1213918-21kworker/u8:0+flush-179:022:45:000
11506389910292,8cyclictest1213918-21kworker/u8:0+flush-179:022:45:210
11506419910091,6cyclictest1187679-21latency_hist21:05:011
11506389910089,5cyclictest1220342-21kworker/u8:2+events_unbound23:05:020
1150641999993,4cyclictest1178111-21kworker/u8:1+flush-179:020:35:191
1150641999992,5cyclictest1196189-21kworker/u8:3+flush-179:022:05:221
1150641999992,5cyclictest1156303-21kworker/u8:0+flush-179:019:25:191
1150638999990,7cyclictest1220342-21kworker/u8:2+flush-179:023:35:160
1150641999890,5cyclictest1178111-21kworker/u8:1+flush-179:021:20:221
1150638999890,6cyclictest1147547-21kworker/u8:1+flush-179:019:20:190
1150641999690,4cyclictest1220342-21kworker/u8:2+flush-179:023:05:171
1150638999686,7cyclictest1213937-21latency_hist22:25:020
1150641999589,4cyclictest1156303-21kworker/u8:0+flush-179:020:00:161
1150638999588,5cyclictest1244510-21kworker/u8:3+flush-179:000:15:140
1150641999488,4cyclictest1196189-21kworker/u8:3+flush-179:022:30:011
1150641999488,4cyclictest1166496-21kworker/u8:3+flush-179:020:05:251
1150641999484,9cyclictest1196189-21kworker/u8:3+flush-179:022:05:001
1150638999487,5cyclictest1220342-21kworker/u8:2+flush-179:023:50:150
1150638999487,5cyclictest1156303-21kworker/u8:0+flush-179:019:30:170
1150641999381,9cyclictest1231955-21/usr/sbin/munin23:20:231
1150638999387,4cyclictest1238050-21kworker/u8:1+flush-179:023:45:240
1150638999380,11cyclictest1185812-21apt-get21:00:000
1150641999283,6cyclictest1209127-21kworker/u8:1+flush-179:022:15:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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