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2026-06-04 - 20:45
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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 Jun 04, 2026 12:44:56)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
218294199121110,8cyclictest2200365-21latency_hist08:05:011
218294199115105,7cyclictest2186021-21latency_hist07:20:001
218293999115107,6cyclictest2237902-21kworker/u8:0+flush-179:010:10:000
21829419910998,8cyclictest2197169-21latency_hist07:55:011
21829419910896,9cyclictest2213360-21/usr/sbin/munin08:45:001
21829399910897,8cyclictest2235625-21latency_hist09:55:020
218293999108100,5cyclictest2189177-21kworker/u8:3+flush-179:007:40:000
21829399910697,7cyclictest2211774-21latency_hist08:40:020
21829419910291,8cyclictest2278900-21kworker/u8:0+flush-179:012:20:011
2182939999875,5cyclictest2227675-21latency_hist09:30:010
2182939999690,4cyclictest2219701-21kworker/u8:2+flush-179:009:15:220
2182939999584,8cyclictest2187614-21latency_hist07:25:000
2182939999487,5cyclictest2271150-21kworker/u8:1+flush-179:012:00:010
218293999941,89cyclictest1-21systemd12:09:590
2182939999279,10cyclictest1213033-21systemd-journal09:50:000
2182941999080,7cyclictest2277280-21latency_hist12:05:001
2182941998963,23cyclictest2288698-21apt-get12:40:001
2182939998781,4cyclictest2250272-21kworker/u8:0+flush-179:011:10:230
2182939998679,5cyclictest2189177-21kworker/u8:3+events_unbound07:30:250
2182939998477,5cyclictest2278900-21kworker/u8:0+flush-179:012:15:220
2182939998378,4cyclictest2213594-21kworker/u8:0+flush-179:009:00:000
2182939998175,4cyclictest2201935-21kworker/u8:1+flush-179:008:30:140
2182939997968,8cyclictest2270915-21latency_hist11:45:010
2182939997872,4cyclictest2211820-21kworker/u8:3+flush-179:008:45:220
2182939997872,4cyclictest2211820-21kworker/u8:3+flush-179:008:45:210
2182939997872,4cyclictest2189177-21kworker/u8:3+flush-179:007:40:200
2182939997771,5cyclictest2271150-21kworker/u8:1+flush-179:011:45:180
2182939997771,4cyclictest2229250-21kworker/u8:3+events_unbound10:15:010
2182939997768,7cyclictest2245189-21latency_hist10:25:000
2182941997670,4cyclictest2250272-21kworker/u8:0+events_unbound11:00:001
2182941997668,6cyclictest2200905-21diskstats08:05:141
2182941997667,7cyclictest2183090-21apt-get07:10:121
2182941997667,7cyclictest2183090-21apt-get07:10:121
2182939997670,5cyclictest2219701-21kworker/u8:2+flush-179:009:30:240
2182939997670,5cyclictest2219701-21kworker/u8:2+flush-179:009:30:230
2182939997569,4cyclictest2189177-21kworker/u8:3+flush-179:008:00:160
2182941997467,5cyclictest2195823-21kworker/u8:2+flush-179:007:55:161
2182939997266,4cyclictest2229250-21kworker/u8:3+flush-179:010:00:230
2182941997160,9cyclictest2232708-21apt-get09:45:121
2182939997166,4cyclictest2163915-21kworker/u8:1+flush-179:007:19:550
2182939997062,6cyclictest2205133-21latency_hist08:20:010
2182941996953,14cyclictest2255643-21kworker/u8:1+events_unbound11:05:011
2182939996964,3cyclictest2256626-21kworker/u8:2+flush-179:011:05:230
2182939996863,3cyclictest2266108-21kworker/u8:0+flush-179:011:35:220
2182939996861,5cyclictest2219701-21kworker/u8:2+flush-179:009:14:280
2182939996857,8cyclictest1213033-21systemd-journal11:30:280
2182939996857,8cyclictest1213033-21systemd-journal11:30:270
2182944996764,2cyclictest0-21swapper/208:37:592
2182939996762,3cyclictest2283104-21kworker/u8:2+flush-179:012:20:220
2182939996759,4cyclictest2201987-21kworker/u8:3+flush-179:008:20:170
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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