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2026-09-18 - 02:13
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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 Sep 17, 2026 12:44:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
186724599155126,26cyclictest1213033-21systemd-journal10:22:471
186724299152142,8cyclictest1895958-21gpgv08:40:000
186724299143133,7cyclictest1886271-21latency_hist08:10:000
1867242991410,136cyclictest1897750-21munin-run08:45:000
186724599140123,6cyclictest1871337-21kworker/u8:2+flush-179:007:45:231
186724599139129,8cyclictest1966172-21kworker/u8:3+events_unbound12:25:011
186724599133124,6cyclictest1881527-21kworker/u8:1+events_unbound09:10:241
186724599126115,8cyclictest1953405-21latency_hist11:35:011
186724599126115,8cyclictest1897675-21latency_hist08:45:021
186724599126108,16cyclictest1922526-21kworker/u8:1+flush-179:010:00:211
186724599125112,9cyclictest1885619-21kworker/u8:0+flush-179:008:25:201
186724599124116,6cyclictest1913876-21kworker/u8:2+events_unbound09:40:241
186724599123111,9cyclictest1873494-21kworker/u8:0+events_unbound07:50:191
18672459912196,17cyclictest1932397-21kworker/u8:1+events_unbound10:35:271
186724599121109,9cyclictest1962967-21latency_hist12:05:011
186724599120114,4cyclictest1904587-21kworker/u8:2+events_unbound09:20:231
186724599120103,5cyclictest1956633-21kworker/u8:3+events_unbound11:55:231
186724599119109,7cyclictest1956633-21kworker/u8:3+flush-179:011:55:011
186724599118108,6cyclictest1881527-21kworker/u8:1+flush-179:008:45:201
186724599118108,6cyclictest1881527-21kworker/u8:1+events_unbound09:35:221
186724599117108,6cyclictest1881527-21kworker/u8:1+events_unbound09:15:191
186724599117106,7cyclictest1964541-21kworker/u8:1+events_unbound12:15:001
186724599116112,3cyclictest1873494-21kworker/u8:0+flush-179:007:30:241
186724599116112,3cyclictest1873494-21kworker/u8:0+flush-179:007:30:241
186724599116111,3cyclictest1919330-21kworker/u8:0+flush-179:010:25:231
186724599115109,4cyclictest1954982-21kworker/u8:2+events_unbound11:40:241
186724599114105,6cyclictest1935592-21kworker/u8:2+events_unbound10:45:221
186724599114104,7cyclictest1902749-21latency_hist09:00:011
186724599114103,8cyclictest1961414-21kworker/u8:2+flush-179:012:30:211
186724299112105,5cyclictest1961414-21kworker/u8:2+flush-179:012:15:150
18672459911199,8cyclictest1923484-21kworker/u8:2+events_unbound10:05:201
18672459911196,6cyclictest1885619-21kworker/u8:0+events_unbound08:20:241
186724599111104,5cyclictest1885619-21kworker/u8:0+events_unbound08:05:241
18672459910996,10cyclictest1919210-21diskstats09:50:151
18672459910993,15cyclictest1919330-21kworker/u8:0+flush-179:011:45:251
18672459910799,5cyclictest1947073-21kworker/u8:3+events_unbound11:15:141
186724599107102,4cyclictest1919330-21kworker/u8:0+events_unbound11:35:221
18672459910699,5cyclictest1935592-21kworker/u8:2+events_unbound11:06:121
18672459910697,6cyclictest1865661-21kworker/u8:3+events_unbound07:10:171
186724599106101,4cyclictest1935592-21kworker/u8:2+events_unbound10:58:581
186724599106100,4cyclictest1935592-21kworker/u8:2+flush-179:011:00:211
18672459910590,6cyclictest1873494-21kworker/u8:0+flush-179:007:35:211
18672459910589,9cyclictest1961345-21kworker/u8:0+events_unbound12:05:221
18672459910494,7cyclictest1881527-21kworker/u8:1+events_unbound09:05:221
18672429910497,6cyclictest1885619-21kworker/u8:0+events_unbound08:25:120
18672459910398,4cyclictest1913876-21kworker/u8:2+flush-179:009:45:141
18672459910396,5cyclictest1935592-21kworker/u8:2+events_unbound11:20:131
18672459910396,4cyclictest1881527-21kworker/u8:1+events_unbound08:50:141
18672459910296,4cyclictest1932400-21kworker/u8:3+flush-179:010:30:251
18672459910296,4cyclictest1865613-21kworker/u8:1+flush-179:007:25:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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