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2026-07-22 - 03:27
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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 Tue Jul 21, 2026 12:44:51)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
369519799143134,6cyclictest3706528-21latency_hist07:45:011
369519799137126,8cyclictest1213033-21systemd-journal12:40:001
369519699135129,4cyclictest3728022-21kworker/u8:0+flush-179:009:15:270
369519799128118,7cyclictest1213033-21systemd-journal11:10:011
369519699122116,4cyclictest3770139-21kworker/u8:0+flush-179:011:15:260
369519799121112,6cyclictest3758485-21kworker/u8:1+flush-179:010:25:001
369519799120113,4cyclictest3740727-21apt-get09:30:011
369519699117109,5cyclictest3784999-21kworker/u8:2+flush-179:012:30:280
369519699117106,9cyclictest3789793-21apt-get11:59:550
369519799115104,7cyclictest3699879-21latency_hist07:25:011
369519799113105,5cyclictest3722930-21kworker/u8:2+flush-179:008:45:271
369519699113103,7cyclictest3699892-21apt-get07:25:000
369519699112101,8cyclictest3696727-21kworker/u8:1+flush-179:007:25:170
369519699111103,6cyclictest3722930-21kworker/u8:2+flush-179:008:40:220
36951969911099,7cyclictest3716560-21kworker/u8:1+flush-179:008:20:170
36951979910996,10cyclictest1213033-21systemd-journal09:45:001
36951979910797,8cyclictest3760345-21kworker/u8:3+flush-179:010:40:231
36951979910792,12cyclictest1213033-21systemd-journal12:00:001
36951969910799,5cyclictest3794906-21kworker/u8:1+flush-179:012:25:230
36951969910797,7cyclictest3766980-21latency_hist10:50:010
36951969910797,7cyclictest3739132-21latency_hist09:25:020
36951969910694,9cyclictest1213033-21systemd-journal07:55:180
36951979910599,4cyclictest3734331-21kworker/u8:1+flush-179:009:59:591
369519699105100,4cyclictest3770139-21kworker/u8:0+flush-179:011:10:260
36951979910492,8cyclictest1213033-21systemd-journal07:25:021
36951969910498,4cyclictest3695049-21kworker/u8:3+flush-179:007:15:160
36951979910380,19cyclictest1213033-21systemd-journal08:34:591
36951969910294,5cyclictest3740859-21kworker/u8:3+flush-179:009:50:000
36951979910194,5cyclictest3773328-21kworker/u8:1+flush-179:011:25:181
36951979910089,8cyclictest3747603-21apt-get09:50:131
36951969910094,4cyclictest3724624-21kworker/u8:1+flush-179:008:45:230
3695197999891,5cyclictest3675763-21kworker/u8:2+flush-179:008:10:241
3695196999890,5cyclictest3722930-21kworker/u8:2+events_unbound08:40:000
3695196999887,8cyclictest3728022-21kworker/u8:0+flush-179:009:05:160
3695197999790,5cyclictest3758485-21kworker/u8:1+flush-179:010:30:221
3695196999789,5cyclictest3794871-21latency_hist12:15:000
3695197999691,3cyclictest3770139-21kworker/u8:0+flush-179:011:20:261
3695197999688,6cyclictest3751225-21kworker/u8:2+flush-179:010:10:221
3695197999688,5cyclictest3722930-21kworker/u8:2+flush-179:008:50:251
3695196999688,6cyclictest3709939-21kworker/u8:0+events_unbound07:55:010
3695196999686,7cyclictest3744172-21latency_hist09:40:010
3695197999587,5cyclictest3696727-21kworker/u8:1+flush-179:007:35:201
3695196999485,6cyclictest3778645-21apt-get11:25:130
3695197999386,5cyclictest3773328-21kworker/u8:1+flush-179:011:40:231
3695197999386,5cyclictest3734331-21kworker/u8:1+flush-179:009:45:271
3695197999385,5cyclictest3740727-21apt-get09:30:021
3695196999385,5cyclictest3696727-21kworker/u8:1+flush-179:007:30:190
3695197999286,4cyclictest3709939-21kworker/u8:0+events_unbound07:55:251
3695196999280,10cyclictest3757171-21apt-get10:20:100
3695197999181,7cyclictest3765429-21kworker/u8:2+flush-179:010:50:221
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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