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2025-08-28 - 22:25
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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 Thu Aug 28, 2025 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
121351799124109,10cyclictest1276409-21latency_hist10:25:020
121351799124109,10cyclictest1276409-21latency_hist10:25:020
121351999118109,6cyclictest1316991-21/usr/sbin/munin12:30:241
12135199910799,6cyclictest1219783-21latency_hist07:30:011
12135179910592,10cyclictest1281456-21latency_hist10:40:020
12135179910390,9cyclictest1229413-21kworker/u8:3+flush-179:008:30:250
1213519999986,10cyclictest1266580-21latency_hist09:55:001
1213517999887,9cyclictest1220043-21apt-get07:30:090
1213519999486,6cyclictest1304041-21kworker/u8:2+flush-179:012:35:251
1213517999482,9cyclictest1231221-21apt-get08:05:130
1213519999184,5cyclictest1312222-21apt-get12:15:121
1213519999179,9cyclictest1283297-21apt-get10:45:121
1213519999179,9cyclictest1283297-21apt-get10:45:111
1213519999176,12cyclictest1295821-21kworker/u8:3+flush-179:011:30:231
1213517999180,9cyclictest1252240-21apt-get09:10:120
1213519999079,8cyclictest1271622-21latency_hist10:10:001
1213519999072,16cyclictest1236006-21apt-get08:20:121
1213519998979,8cyclictest601706-21systemd-journal07:40:011
1213517998674,9cyclictest1265534-21diskstats09:50:160
1213519998476,6cyclictest1310354-21kworker/u8:1+flush-179:012:10:251
1213519998377,4cyclictest1298948-21kworker/u8:1+flush-179:011:45:261
1213517998375,5cyclictest1230966-21latency_hist08:05:010
1213517998372,9cyclictest1294452-21apt-get11:20:120
1213517998274,6cyclictest1289668-21apt-get11:05:160
1213519998070,8cyclictest1244209-21kworker/u8:1+flush-179:008:55:011
1213517998072,6cyclictest601706-21systemd-journal10:49:380
1213517998072,6cyclictest601706-21systemd-journal10:49:370
1213519997972,6cyclictest1295821-21kworker/u8:3+flush-179:011:30:001
1213517997967,9cyclictest1283041-21latency_hist10:45:010
1213517997872,4cyclictest1221353-21kworker/u8:0+flush-179:007:45:220
1213517997869,7cyclictest1291253-21apt-get11:10:120
1213517997860,16cyclictest0-21swapper/012:22:590
1213519997766,8cyclictest1292585-21latency_hist11:15:021
1213517997768,7cyclictest1250397-21latency_hist09:05:010
1213517997566,7cyclictest1311966-21latency_hist12:15:010
1213517997463,8cyclictest1227768-21latency_hist07:55:010
1213517997463,8cyclictest1218197-21latency_hist07:25:000
1213517997462,9cyclictest1279845-21latency_hist10:35:010
1213519997362,8cyclictest1243714-21latency_hist08:45:011
1213517997363,8cyclictest1269875-21kworker/u8:2+flush-179:010:05:230
1213519997264,6cyclictest1197383-21kworker/u8:3+flush-179:007:10:171
1213517997265,4cyclictest1277285-21kworker/u8:0+flush-179:011:15:160
1213519997162,7cyclictest601706-21systemd-journal11:25:001
1213519997162,6cyclictest1304041-21kworker/u8:2+flush-179:012:20:231
1213517997162,7cyclictest1227801-21kworker/u8:2+events_unbound07:55:170
1213519997059,9cyclictest1264748-21apt-get09:50:001
1213517997060,8cyclictest1215238-21/usr/sbin/munin07:15:180
1213519996962,5cyclictest1307440-21/usr/sbin/munin12:00:231
1213519996960,7cyclictest1281410-21kworker/u8:1+flush-179:010:40:171
1213517996962,5cyclictest1284883-21apt-get10:50:110
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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