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2026-08-28 - 17:15
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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 Fri Aug 28, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
197666999129117,9cyclictest2024660-21latency_hist09:40:011
197666899127116,8cyclictest1213033-21systemd-journal08:20:000
197666899121110,7cyclictest2003893-21kworker/u8:3+flush-179:009:05:010
197666899118107,8cyclictest2007102-21latency_hist08:45:020
197666999117104,10cyclictest1213033-21systemd-journal09:30:011
197666999116106,7cyclictest1989341-21latency_hist07:50:011
197666999112100,9cyclictest1997281-21latency_hist08:15:001
19766699911099,8cyclictest2039240-21latency_hist10:25:011
19766689911096,11cyclictest1213033-21systemd-journal10:45:000
197666999108100,6cyclictest2042393-21kworker/u8:2+flush-179:011:00:231
19766699910497,5cyclictest1968562-21kworker/u8:1+flush-179:007:20:001
19766699910394,7cyclictest2077446-21apt-get12:25:031
19766699910296,4cyclictest1979806-21kworker/u8:3+flush-179:007:25:141
19766689910291,8cyclictest2023056-21latency_hist09:35:020
1976669999991,6cyclictest2075880-21kworker/u8:1+flush-179:012:39:591
1976669999991,6cyclictest2041082-21apt-get10:30:111
1976669999888,8cyclictest2010271-21latency_hist08:55:011
1976669999685,8cyclictest2008687-21latency_hist08:50:011
1976668999587,6cyclictest2012934-21kworker/u8:0+flush-179:011:05:280
1976669999282,7cyclictest1984524-21latency_hist07:35:011
1976668999281,8cyclictest2003909-21latency_hist08:35:000
1976668999080,7cyclictest1213033-21systemd-journal12:30:000
1976669998982,5cyclictest2032870-21apt-get10:05:111
1976669998982,5cyclictest1975042-21kworker/u8:2+flush-179:007:20:151
1976669998982,5cyclictest1975042-21kworker/u8:2+flush-179:007:10:221
1976668998982,5cyclictest2012934-21kworker/u8:0+flush-179:009:10:170
1976668998978,8cyclictest2042393-21kworker/u8:2+events_unbound11:15:260
1976668998677,7cyclictest1979806-21kworker/u8:3+flush-179:007:40:010
1976669998578,5cyclictest2076103-21apt-get12:20:111
1976669998573,11cyclictest2015035-21kworker/u8:1+flush-179:009:15:011
1976669998572,11cyclictest2056784-21kworker/u8:0+events_unbound12:00:011
1976668998474,8cyclictest2072652-21latency_hist12:10:020
1976668998474,8cyclictest2049030-21apt-get10:55:100
1976668998374,7cyclictest2012934-21kworker/u8:0+events_unbound11:05:010
1976668998367,13cyclictest2010527-21apt-get08:55:110
1976668998274,5cyclictest2015035-21kworker/u8:1+events_unbound09:15:150
1976668998273,6cyclictest2048776-21latency_hist10:55:010
1976668998271,9cyclictest510-21rs:main0
1976668998271,9cyclictest510-21rs:main0
1976669998067,10cyclictest2023016-21apt-get09:34:281
1976668998072,6cyclictest2060699-21kworker/u8:1+flush-179:011:35:250
1976668998070,7cyclictest1213033-21systemd-journal12:05:010
1976669997972,4cyclictest2012934-21kworker/u8:0+flush-179:010:55:011
1976669997971,5cyclictest2067915-21kworker/u8:4+events_unbound12:05:241
1976669997969,7cyclictest1989330-21kworker/u8:1+events_unbound08:00:151
1976669997868,8cyclictest2066541-21apt-get11:50:141
1976669997768,7cyclictest1213033-21systemd-journal11:30:001
1976669997768,6cyclictest2032615-21latency_hist10:05:011
1976668997767,8cyclictest2056784-21kworker/u8:0+events_unbound12:20:010
1976669997668,5cyclictest2056784-21kworker/u8:0+flush-179:012:15:001
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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