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2026-04-15 - 20:43
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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 Apr 15, 2026 12:44:55)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2417098999584,8cyclictest2494509-21latency_hist11:10:010
2417098999181,7cyclictest2486040-21latency_hist10:45:010
2417098998576,7cyclictest2438006-21latency_hist08:15:010
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417098998573,9cyclictest266-21systemd-journal07:35:000
2417101998476,6cyclictest2512026-21latency_hist12:05:011
2417101998472,11cyclictest2429824-21http07:50:011
2417101998275,5cyclictest2428205-21latency_hist07:45:011
2417098998169,10cyclictest2452608-21apt-get09:00:110
2417101998070,8cyclictest2473336-21kworker/u8:1+flush-179:010:20:001
2417098997869,6cyclictest2484439-21latency_hist10:40:010
2417098997869,6cyclictest2421807-21latency_hist07:25:010
2417098997566,7cyclictest2418611-21latency_hist07:15:000
2417101997264,6cyclictest2453939-21latency_hist09:05:011
2417101997156,13cyclictest2468246-21kworker/u8:1+flush-179:009:49:541
2417101997063,5cyclictest2496130-21kworker/u8:3+flush-179:012:00:001
2417101997063,5cyclictest2496130-21kworker/u8:3+flush-179:012:00:001
2417101997050,18cyclictest2475936-21kworker/u8:0+flush-179:010:15:011
2417101996960,7cyclictest2452361-21latency_hist09:00:011
2417101996960,6cyclictest2434814-21kworker/u8:2+flush-179:008:25:171
2417098996954,6cyclictest2454198-21apt-get09:05:120
2417101996553,8cyclictest266-21systemd-journal08:20:111
2417098996556,7cyclictest2468778-21apt-get09:50:110
2417101996455,7cyclictest2450743-21latency_hist08:55:011
2417101996454,8cyclictest2518635-21/usr/sbin/munin12:25:241
2417098996350,10cyclictest266-21systemd-journal10:25:000
2417101996255,5cyclictest2501422-21diskstats11:30:151
2417098996254,6cyclictest2523443-21latency_hist12:40:010
2417098996253,7cyclictest2439606-21latency_hist08:20:010
2417101996051,7cyclictest2434836-21latency_hist08:05:011
2417098996051,7cyclictest2428462-21apt-get07:45:130
2417101995954,4cyclictest2475936-21kworker/u8:0+flush-179:010:24:561
2417101995952,5cyclictest2409639-21kworker/u8:0+flush-179:007:30:201
2417101995952,5cyclictest2409639-21kworker/u8:0+flush-179:007:30:201
2417101995854,3cyclictest2429785-21kworker/u8:0+flush-179:008:10:251
2417101995849,7cyclictest2491575-21/usr/sbin/munin11:00:251
2417098995849,7cyclictest2429785-21kworker/u8:0+flush-179:007:55:230
2417101995651,4cyclictest2499325-21kworker/u8:1+flush-179:011:40:251
2417101995648,6cyclictest2434814-21kworker/u8:2+flush-179:008:15:221
2417101995646,8cyclictest2446021-21kworker/u8:0+flush-179:009:15:011
2417098995648,6cyclictest2474888-21latency_hist10:10:000
2417098995647,7cyclictest266-21systemd-journal12:30:000
2417101995546,7cyclictest2463533-21kworker/u8:3+events_unbound10:00:221
2417101995544,9cyclictest2479709-21kworker/u8:2+flush-179:010:40:231
2417098995546,6cyclictest2496095-21latency_hist11:15:000
2417098995441,11cyclictest2465108-21basename09:40:010
2417098995441,11cyclictest2465108-21basename09:40:000
2417101995346,5cyclictest2475936-21kworker/u8:0+events_unbound11:15:001
2417101995342,8cyclictest2475936-21kworker/u8:0+flush-179:010:33:111
2417098995344,7cyclictest2418847-21/usr/sbin/munin07:15:220
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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