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2026-03-23 - 17:49
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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 100 highest latencies:
System rackbslot7.osadl.org (updated Mon Mar 23, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
17197215712,101sleep016315-21/usr/sbin/munin07:00:270
17197215712,101sleep016315-21/usr/sbin/munin07:00:270
178409911242,39cyclictest0-21swapper/211:14:562
178409910890,11cyclictest11356-21if_err_eth009:35:032
17840991053,30cyclictest16246-21seq08:38:132
17840991042,51cyclictest2569-21ssh10:14:532
17840991032,28cyclictest32546-21seq07:48:162
17840991032,28cyclictest32546-21seq07:48:162
1784099954,31cyclictest9605-21runrttasks08:15:422
1784099954,31cyclictest9605-21runrttasks08:15:422
229622940,6sleep10-21swapper/110:49:271
17832999354,34cyclictest0-21swapper/108:19:391
17832999354,34cyclictest0-21swapper/108:19:391
17840999241,41cyclictest0-21swapper/212:20:112
17840999150,36cyclictest0-21swapper/212:29:572
17840999149,36cyclictest6239-21sh12:09:552
17840999149,36cyclictest6239-21sh12:09:552
17840999148,35cyclictest0-21swapper/208:30:162
1784099913,26cyclictest25694-21runrttasks11:48:102
1784099913,26cyclictest25694-21runrttasks11:48:102
1783299913,31cyclictest5292-21taskset10:19:411
1783299912,53cyclictest13967-21apt-get09:39:511
1783299912,53cyclictest13967-21apt-get09:39:511
17832999112,67cyclictest26767-21apt-get11:50:111
17840999070,14cyclictest32450-21systemd-run11:59:402
1784099903,31cyclictest352-21runrttasks07:21:332
17840998968,14cyclictest17810-21cyclictest10:00:042
17840998963,18cyclictest1-21systemd09:08:062
17840998942,36cyclictest0-21swapper/210:48:472
17832998942,38cyclictest0-21swapper/107:04:441
17832998942,38cyclictest0-21swapper/107:04:441
17832998866,11cyclictest0-21swapper/109:20:021
1784099872,26cyclictest352-21runrttasks08:46:152
17832998746,33cyclictest0-21swapper/109:19:391
1783299872,25cyclictest352-21runrttasks10:53:521
17840998661,14cyclictest0-21swapper/207:35:012
1784099862,38cyclictest3522-21fschecks_time12:05:002
1783299863,36cyclictest352-21runrttasks10:12:411
1783299863,36cyclictest16381-21idleruntime-cro08:39:391
1783299863,36cyclictest10998-21ssh12:17:141
1783299862,34cyclictest352-21runrttasks10:38:581
17820998656,24cyclictest19706-21apt-key09:49:420
17820998656,24cyclictest19706-21apt-key09:49:420
17840998542,35cyclictest0-21swapper/208:20:142
17840998542,35cyclictest0-21swapper/208:20:142
17840998539,39cyclictest0-21swapper/211:24:412
1784099852,7cyclictest0-21swapper/208:24:542
1784099852,7cyclictest0-21swapper/208:24:542
1784099852,43cyclictest352-21runrttasks09:24:402
17832998538,40cyclictest0-21swapper/109:10:031
17832998538,40cyclictest0-21swapper/109:10:031
1783299853,30cyclictest18470-21/usr/sbin/munin08:44:511
17832998532,45cyclictest0-21swapper/107:20:031
1783299852,27cyclictest5722-21latency08:05:031
17840998466,12cyclictest550-21unixbench_multi10:10:172
17840998439,37cyclictest0-21swapper/212:15:112
17840998436,42cyclictest0-21swapper/209:40:152
17840998436,42cyclictest0-21swapper/209:40:152
1784099843,40cyclictest3471-21awk07:59:392
1784099842,38cyclictest31278-21apt-get09:14:502
17832998459,16cyclictest25174-21latency_hist09:04:451
17832998459,16cyclictest25174-21latency_hist09:04:451
1783299843,37cyclictest576-21fschecks_time12:00:001
1783299843,37cyclictest576-21fschecks_time12:00:001
1783299843,36cyclictest7102-21cat08:10:001
1783299843,36cyclictest7102-21cat08:10:001
1783299843,34cyclictest10971-21/usr/sbin/munin09:34:551
17820998469,9cyclictest200-21systemd-journal12:14:400
17820998469,9cyclictest200-21systemd-journal12:14:400
1784099833,68cyclictest22622-21/usr/sbin/munin08:55:542
1784099833,38cyclictest25822-21munin-run09:59:412
1784099833,38cyclictest25822-21munin-run09:59:412
1784099832,33cyclictest4204-21/usr/sbin/munin08:00:082
1784099832,33cyclictest25762-21/usr/sbin/munin07:25:162
1784099832,32cyclictest22548-21/usr/sbin/munin07:15:152
17832998365,11cyclictest0-21swapper/110:40:141
1783299835,35cyclictest23485-21latency_hist08:59:421
17832998345,31cyclictest9417-21timerwakeupswit10:25:141
17832998345,31cyclictest9417-21timerwakeupswit10:25:141
17832998334,11cyclictest58-21kcompactd009:59:211
17832998334,11cyclictest58-21kcompactd009:59:211
1783299833,35cyclictest27432-21grep07:30:181
17832998313,26cyclictest12308-21sh11:25:101
1784099827,33cyclictest15222-21cpuspeed12:24:552
17840998265,10cyclictest25593-21kworker/u17:3-rpciod10:35:032
1784099825,31cyclictest20190-21/usr/sbin/munin08:49:572
17840998247,12cyclictest181rcu_preempt09:54:422
1784099823,7cyclictest0-21swapper/207:39:552
1784099823,36cyclictest27825-21modprobe07:34:402
1784099823,33cyclictest18415-21grep10:40:142
1784099822,39cyclictest2451-21latency_hist11:09:422
1784099822,38cyclictest352-21runrttasks10:21:552
1784099822,32cyclictest7138-21sort08:10:012
1784099822,32cyclictest7138-21sort08:10:012
17832998244,33cyclictest25266-21kworker/u17:2-rpciod09:24:511
17832998244,33cyclictest25266-21kworker/u17:2-rpciod09:24:511
1783299824,33cyclictest5192-21ssh12:07:411
1783299823,34cyclictest6191-21/usr/sbin/munin12:10:131
1783299823,34cyclictest6191-21/usr/sbin/munin12:10:131
1783299823,32cyclictest11440-21/usr/sbin/munin10:30:051
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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