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2026-01-11 - 17:49
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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 Sun Jan 11, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
78143399110102,5cyclictest827986-21kworker/u8:0+flush-179:009:45:000
781437999586,7cyclictest266-21systemd-journal10:35:001
781433999487,4cyclictest795694-21true07:55:000
781433999487,4cyclictest795694-21true07:55:000
781433998979,7cyclictest818210-21latency_hist09:05:010
781437998877,8cyclictest886601-21latency_hist12:40:011
781437998780,4cyclictest781351-21kworker/u8:0+flush-179:007:15:001
781437998574,8cyclictest266-21systemd-journal07:55:011
781437998574,8cyclictest266-21systemd-journal07:55:001
781433998273,7cyclictest852885-21/usr/sbin/munin10:50:240
781437997463,8cyclictest808697-21kworker/u8:2+flush-179:009:25:181
781433997462,10cyclictest882078-21apt-get12:25:130
781433997364,7cyclictest836212-21latency_hist10:00:010
781433997364,7cyclictest836212-21latency_hist10:00:010
781433997362,9cyclictest839898-21/usr/sbin/munin10:10:230
781437997262,8cyclictest828132-21gpgv09:35:011
781437997262,8cyclictest828132-21gpgv09:35:011
781433997060,7cyclictest852645-21latency_hist10:50:020
781437996962,5cyclictest846264-21kworker/u8:4+flush-179:011:00:011
781437996559,4cyclictest857674-21kworker/u8:0+flush-179:011:05:251
781439996461,2cyclictest0-21swapper/211:18:592
781439996461,2cyclictest0-21swapper/211:18:582
781439996460,2cyclictest0-21swapper/212:17:592
781437996442,20cyclictest869088-21apt-get11:40:111
781433996459,4cyclictest846264-21kworker/u8:4+flush-179:010:40:260
781433996455,7cyclictest875432-21/usr/sbin/munin12:00:230
781433996453,9cyclictest826672-21apt-get09:30:110
781433996453,9cyclictest826672-21apt-get09:30:110
781437996357,5cyclictest781351-21kworker/u8:0+events_unbound07:35:001
781437996156,3cyclictest714-21Xorg08:45:591
781433996151,8cyclictest870449-21kworker/u8:1+flush-179:012:10:200
781433996151,8cyclictest870449-21kworker/u8:1+flush-179:012:10:190
781437996049,8cyclictest266-21systemd-journal07:40:001
781433996054,4cyclictest854075-21kworker/u8:2+events_unbound11:20:230
781433996054,4cyclictest803589-21kworker/u8:0+events_unbound08:25:000
781433995946,10cyclictest789513-21/usr/sbin/munin07:35:280
781433995851,5cyclictest846264-21kworker/u8:4+events_unbound11:00:020
781437995648,6cyclictest880489-21apt-get12:20:081
781437995648,6cyclictest829903-21kworker/u8:1+flush-179:010:20:011
78143799560,1cyclictest0-21swapper/107:25:001
781433995651,4cyclictest796696-21kworker/u8:0+flush-179:008:00:260
781433995548,5cyclictest870449-21kworker/u8:1+events_unbound12:25:010
781433995547,4cyclictest829903-21kworker/u8:1+flush-179:010:00:150
781433995547,4cyclictest829903-21kworker/u8:1+flush-179:010:00:140
781441995452,1cyclictest0-21swapper/310:22:593
781437995447,5cyclictest803589-21kworker/u8:0+flush-179:008:20:011
781437995432,5cyclictest792492-21latency_hist07:45:021
781433995447,6cyclictest813687-21kworker/u8:0+flush-179:009:10:170
781433995345,6cyclictest854075-21kworker/u8:2+flush-179:011:40:150
781437995246,4cyclictest829903-21kworker/u8:1+flush-179:009:40:201
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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