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2026-03-12 - 20:07
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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 Mar 12, 2026 12:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
7795969910289,10cyclictest833342-21latency_hist09:55:010
779596999383,7cyclictest787991-21latency_hist07:35:020
779596999282,7cyclictest846334-21latency_hist10:35:010
779596998876,9cyclictest784573-21apt-get07:25:000
779599998782,4cyclictest870760-21kworker/u8:0+flush-179:012:10:001
779596998676,7cyclictest820354-21latency_hist09:15:000
779599998578,5cyclictest857983-21kworker/u8:1+flush-179:011:10:011
779599998475,7cyclictest859614-21kworker/u8:3+flush-179:011:40:011
779596998273,6cyclictest849526-21latency_hist10:45:010
779599998071,6cyclictest831758-21latency_hist09:50:011
779599998071,6cyclictest794376-21latency_hist07:55:011
779596998069,8cyclictest835207-21latency_hist10:00:010
779599997871,5cyclictest826714-21kworker/u8:0+flush-179:009:40:011
779599997767,7cyclictest859579-21latency_hist11:15:011
779599997668,6cyclictest868220-21kworker/u8:2+flush-179:012:15:011
779599997667,6cyclictest784605-21kworker/u8:3+flush-179:008:55:251
779599997570,4cyclictest794515-21kworker/u8:1+events_unbound08:00:021
779599997570,4cyclictest794515-21kworker/u8:1+events_unbound08:00:011
779599997261,8cyclictest880279-21latency_hist12:20:011
779599997065,4cyclictest857983-21kworker/u8:1+flush-179:011:25:241
779599997063,5cyclictest825121-21kworker/u8:1+flush-179:010:00:151
779599996961,5cyclictest784605-21kworker/u8:3+flush-179:009:15:211
779599996955,12cyclictest784605-21kworker/u8:3+events_unbound07:39:591
779599996860,6cyclictest806294-21apt-get08:30:081
779599996858,7cyclictest266-21systemd-journal10:55:011
779599996857,8cyclictest883698-21kworker/u8:1+flush-179:012:40:001
779596996860,6cyclictest856411-21latency_hist11:05:010
779599996760,5cyclictest809265-21kworker/u8:0+flush-179:008:40:211
779599996760,5cyclictest784605-21kworker/u8:3+flush-179:008:40:021
779596996752,13cyclictest266-21systemd-journal07:35:230
779599996657,6cyclictest793471-21kworker/u8:0+flush-179:008:05:201
779599996653,10cyclictest266-21systemd-journal08:25:201
779599996558,4cyclictest784605-21kworker/u8:3+events_unbound07:45:231
779599996459,4cyclictest835872-21kworker/u8:2+flush-179:010:29:561
779599996459,4cyclictest835872-21kworker/u8:2+flush-179:010:29:551
779599996458,4cyclictest826714-21kworker/u8:0+flush-179:009:40:131
779596996456,6cyclictest863029-21apt-get11:25:120
779599996358,4cyclictest797864-21kworker/u8:2+events_unbound08:15:001
779599996353,7cyclictest266-21systemd-journal11:25:001
77959999630,62cyclictest0-21swapper/108:49:591
779596996257,4cyclictest788019-21kworker/u8:2+flush-179:007:40:190
779596996254,5cyclictest847938-21latency_hist10:40:010
779596996053,5cyclictest868220-21kworker/u8:2+flush-179:012:30:220
779596996053,5cyclictest868220-21kworker/u8:2+flush-179:012:30:210
779596996048,9cyclictest870760-21kworker/u8:0+flush-179:011:55:210
779599995952,6cyclictest266-21systemd-journal07:34:201
779599995950,7cyclictest870760-21kworker/u8:0+flush-179:011:55:231
779596995846,9cyclictest266-21systemd-journal11:40:000
779596995750,5cyclictest853756-21diskstats10:55:140
779596995748,7cyclictest817440-21apt-get09:05:100
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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