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2026-03-28 - 06:33
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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 Mar 28, 2026 00:44:57)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
18457149910390,10cyclictest266-21systemd-journal22:00:010
1845716999889,7cyclictest1908725-21latency_hist22:25:011
1845716999588,5cyclictest1939271-21kworker/u8:2+flush-179:000:00:011
1845716999283,7cyclictest1902106-21latency_hist22:05:001
1845716998982,5cyclictest1855175-21latency_hist19:40:021
1845714998879,6cyclictest1937616-21latency_hist23:55:010
1845716998274,6cyclictest1850416-21latency_hist19:25:011
1845716998273,7cyclictest1902079-21kworker/u8:1+flush-179:022:20:011
1845714997870,5cyclictest1945904-21latency_hist00:20:010
1845714997870,5cyclictest1945904-21latency_hist00:20:010
1845716997670,5cyclictest1939271-21kworker/u8:2+events_unbound00:04:001
1845716997568,5cyclictest1895743-21latency_hist21:45:001
1845716997367,4cyclictest1939271-21kworker/u8:2+flush-179:000:10:231
1845716997364,7cyclictest1897327-21latency_hist21:50:021
1845716997264,6cyclictest1868182-21latency_hist20:20:011
1845716997061,7cyclictest1946151-21/usr/sbin/munin00:20:231
1845716996964,3cyclictest1829297-21kworker/u8:4+flush-179:019:50:231
1845716996963,4cyclictest1871423-21kworker/u8:2+flush-179:021:30:251
1845716996958,9cyclictest266-21systemd-journal20:59:591
1845714996959,7cyclictest266-21systemd-journal20:40:010
1845716996761,4cyclictest1917814-21kworker/u8:0+flush-179:022:55:251
1845714996757,8cyclictest266-21systemd-journal00:04:000
1845716996459,4cyclictest1871423-21kworker/u8:2+flush-179:020:35:001
1845716996458,4cyclictest1829297-21kworker/u8:4+events_unbound20:05:011
1845716996458,4cyclictest1829297-21kworker/u8:4+events_unbound20:05:001
1845716996457,5cyclictest1886227-21kworker/u8:1+flush-179:021:35:201
1845716996455,7cyclictest1911891-21kworker/u8:1+flush-179:022:35:001
1845714996448,14cyclictest1915074-21kworker/u8:2+flush-179:022:50:000
1845716996356,4cyclictest1876370-21kworker/u8:0+flush-179:021:05:011
1845716996254,5cyclictest1829297-21kworker/u8:4+events_unbound19:15:191
1845716996254,4cyclictest1876370-21kworker/u8:0+flush-179:020:50:241
1845714996154,5cyclictest1921717-21latency_hist23:05:010
1845714996038,20cyclictest1886183-21latency_hist21:15:010
1845714996038,20cyclictest1886183-21latency_hist21:15:000
1845716995951,6cyclictest1902079-21kworker/u8:1+flush-179:022:05:221
1845716995948,8cyclictest266-21systemd-journal22:45:001
1845716995948,8cyclictest266-21systemd-journal22:45:001
1845714995940,17cyclictest1949086-21latency_hist00:30:010
1845714995647,7cyclictest1883252-21/usr/sbin/munin21:05:240
1845716995548,5cyclictest1845646-21kworker/u8:0+flush-179:019:10:211
1845714995545,8cyclictest1939244-40mandb00:00:020
1845716995450,3cyclictest1876370-21kworker/u8:0+flush-179:020:49:561
1845716995449,3cyclictest1892585-21kworker/u8:3+flush-179:021:55:201
1845716995448,4cyclictest1911891-21kworker/u8:1+flush-179:022:35:151
1845716995447,5cyclictest1862464-21kworker/u8:0+flush-179:020:34:561
1845716995447,5cyclictest1853567-21kworker/u8:0+flush-179:019:40:211
1845716995440,13cyclictest1929648-21kworker/u8:1+flush-179:023:40:271
1845714995446,7cyclictest1871423-21kworker/u8:2+flush-179:021:20:000
1845714995445,7cyclictest1903689-21latency_hist22:10:010
1845716995346,5cyclictest1876370-21kworker/u8:0+flush-179:021:25:211
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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