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2026-04-08 - 04:43
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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 08, 2026 00:44:54)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27326889911798,15cyclictest266-21systemd-journal00:04:000
27326889910999,6cyclictest2748863-21kworker/u8:0+events_unbound20:15:010
2732694999790,5cyclictest2773011-21kworker/u8:0+events_unbound21:15:021
2732688999784,9cyclictest2768554-21kworker/u8:2+flush-179:022:45:010
2732694999683,10cyclictest266-21systemd-journal20:45:001
2732694999589,4cyclictest2785181-21kworker/u8:4+flush-179:021:55:191
2732688999586,6cyclictest2789961-21/usr/sbin/munin22:05:230
2732688999585,7cyclictest2781513-21latency_hist21:40:010
2732694999285,6cyclictest2748863-21kworker/u8:0+flush-179:020:30:211
2732688999182,6cyclictest2789725-21latency_hist22:05:010
2732694999081,7cyclictest266-21systemd-journal20:10:001
2732688998980,6cyclictest2765068-21latency_hist20:50:000
2732694998880,7cyclictest2820257-21kworker/u8:3+flush-179:000:30:191
2732694998680,5cyclictest2788394-21kworker/u8:0+events_unbound22:15:191
2732694998672,6cyclictest2801162-21kworker/u8:1+flush-179:023:10:201
2732694998577,5cyclictest2760272-21kworker/u8:3+events_unbound20:45:191
2732694998476,5cyclictest2799496-21kworker/u8:3+events_unbound23:10:011
2732688998477,4cyclictest2820257-21kworker/u8:3+flush-179:000:00:000
2732694998377,4cyclictest2768554-21kworker/u8:2+flush-179:021:40:211
2732694998376,5cyclictest2782534-21kworker/u8:1+flush-179:021:50:181
2732694998375,5cyclictest2818601-21kworker/u8:2+events_unbound23:50:221
2732688998374,6cyclictest2804298-21latency_hist22:50:010
2732694998276,4cyclictest2818601-21kworker/u8:2+events_unbound23:40:241
2732694998275,5cyclictest2829856-21kworker/u8:2+flush-179:000:25:221
2732694998275,5cyclictest2748863-21kworker/u8:0+flush-179:020:00:241
2732694998175,4cyclictest2721957-21kworker/u8:2+flush-179:019:20:201
2732694998065,11cyclictest2792894-21latency_hist22:15:011
2732688998070,8cyclictest266-21systemd-journal22:15:010
2732694997973,5cyclictest2799496-21kworker/u8:3+events_unbound23:20:241
2732694997973,4cyclictest2721957-21kworker/u8:2+events_unbound19:45:001
2732694997866,9cyclictest266-21systemd-journal21:30:011
2732694997865,5cyclictest2768554-21kworker/u8:2+events_unbound21:45:241
2732694997865,5cyclictest2768554-21kworker/u8:2+events_unbound21:45:241
2732688997869,6cyclictest2812246-21latency_hist23:15:010
2732694997768,7cyclictest2773011-21kworker/u8:0+events_unbound21:25:001
2732694997765,9cyclictest2778604-21diskstats21:30:151
2732688997767,8cyclictest266-21systemd-journal22:25:000
2732694997671,3cyclictest2721957-21kworker/u8:2+flush-179:019:50:241
2732694997671,3cyclictest2721957-21kworker/u8:2+flush-179:019:50:241
2732694997670,4cyclictest2768554-21kworker/u8:2+events_unbound22:35:221
2732694997670,4cyclictest2768554-21kworker/u8:2+events_unbound22:35:221
2732694997669,5cyclictest2750483-21kworker/u8:2+events_unbound20:10:251
2732694997669,5cyclictest2737540-21kworker/u8:3+events_unbound19:35:021
2732694997668,5cyclictest2799496-21kworker/u8:3+flush-179:023:00:151
2732694997668,5cyclictest2799496-21kworker/u8:3+flush-179:023:00:151
2732694997667,6cyclictest2762135-21kworker/u8:1+events_unbound21:00:001
2732694997665,7cyclictest2826636-21kworker/u8:1+flush-179:000:00:151
2732694997568,5cyclictest2804288-21kworker/u8:0+flush-179:022:50:251
2732694997567,6cyclictest2799496-21kworker/u8:3+flush-179:022:40:261
2732688997566,7cyclictest2762135-21kworker/u8:1+flush-179:021:00:010
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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