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2026-06-17 - 15:55
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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 Wed Jun 17, 2026 12:44:59)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
390472299122112,8cyclictest3970790-21kworker/u8:0+events_unbound10:50:031
390472299121110,8cyclictest510-21rs:main1
390471799119108,8cyclictest3956492-21latency_hist09:50:010
390471799119108,8cyclictest3956492-21latency_hist09:50:000
390472299116103,10cyclictest3937030-21cat08:50:011
390471799112102,7cyclictest3909543-21latency_hist07:25:010
390472299110103,4cyclictest3991864-21kworker/u8:0+flush-179:012:30:221
390471799110100,6cyclictest3931843-21latency_hist08:35:000
39047229910795,9cyclictest1213033-21systemd-journal07:45:011
39047179910493,8cyclictest3948575-21kworker/u8:0+flush-179:009:40:000
39047229910279,21cyclictest3912717-21latency_hist07:35:011
39047229910090,7cyclictest3948575-21kworker/u8:0+flush-179:009:35:231
3904722999887,8cyclictest3937012-21kworker/u8:3+flush-179:008:55:191
3904722999574,19cyclictest510-21rs:main1
3904722999486,5cyclictest3991864-21kworker/u8:0+flush-179:012:20:201
3904722999282,8cyclictest1213033-21systemd-journal10:05:001
3904717999182,7cyclictest3946717-21apt-get09:20:030
3904717999182,7cyclictest3946717-21apt-get09:20:030
3904722999084,4cyclictest3991864-21kworker/u8:0+flush-179:012:00:171
3904722999084,4cyclictest3970795-21kworker/u8:1+flush-179:010:45:211
3904722998979,7cyclictest3962844-21kworker/u8:2+flush-179:010:30:211
3904717998979,7cyclictest4009319-21latency_hist12:35:010
3904722998881,5cyclictest3937012-21kworker/u8:3+flush-179:009:15:141
3904722998881,5cyclictest3937012-21kworker/u8:3+flush-179:009:15:131
3904717998875,10cyclictest1213033-21systemd-journal11:35:000
3904717998875,10cyclictest1213033-21systemd-journal11:35:000
3904722998780,5cyclictest3917759-21kworker/u8:0+flush-179:008:30:251
3904730998656,29cyclictest0-21swapper/310:07:593
3904722998677,6cyclictest3914381-21kworker/u8:3+flush-179:007:55:231
3904722998659,9cyclictest3980937-21apt-get11:05:121
3904722998579,4cyclictest3910321-21kworker/u8:1+flush-179:007:35:231
3904722998575,7cyclictest3985453-21latency_hist11:20:011
3904717998576,6cyclictest3991812-21latency_hist11:40:000
3904722998464,17cyclictest1213033-21systemd-journal09:34:591
3904722998373,9cyclictest3991864-21kworker/u8:0+flush-179:011:59:551
3904722998372,6cyclictest3975583-21kworker/u8:3+flush-179:011:30:211
3904722998372,6cyclictest3975583-21kworker/u8:3+flush-179:011:30:211
3904722998368,13cyclictest3998228-21kworker/u8:3+flush-179:012:27:161
3904722998275,5cyclictest3998152-21kworker/u8:1+flush-179:012:05:221
3904722998075,3cyclictest3962844-21kworker/u8:2+flush-179:010:25:181
3904722998073,6cyclictest3985717-21apt-get11:20:101
3904722997973,4cyclictest3988612-21kworker/u8:0+events_unbound11:30:011
3904722997970,6cyclictest3917523-21latency_hist07:50:021
3904722997968,7cyclictest3951697-21kworker/u8:3+flush-179:010:05:221
3904722997870,5cyclictest3954885-21kworker/u8:1+flush-179:009:45:221
3904722997870,5cyclictest3954885-21kworker/u8:1+flush-179:009:45:221
3904717997872,4cyclictest3935051-21apt-get08:45:000
3904717997770,5cyclictest1-21systemd08:55:010
3904722997670,5cyclictest3923867-21kworker/u8:2+flush-179:008:10:221
3904722997668,5cyclictest3920952-21kworker/u8:1+events_unbound08:00:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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