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2026-06-04 - 08:51
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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 Thu Jun 04, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
3856991153,91cyclictest18367-21expr22:26:011
3864991102,83cyclictest18881-21apt-get00:15:032
341121087,81sleep00-21swapper/018:56:070
3844991035,59cyclictest15-21ksoftirqd/021:28:270
385699993,73cyclictest16303-21modprobe00:10:131
3872999716,52cyclictest0-21swapper/300:15:063
385699958,79cyclictest9918-21kworker/u17:1+ext4-rsv-conversion22:15:191
3856999450,39cyclictest3832-21cyclictest23:10:201
385699936,43cyclictest8704-21munin-plugin-st19:19:481
3856999349,38cyclictest12381-21sh21:22:121
3856999349,38cyclictest12381-21sh21:22:121
385699933,37cyclictest13206-21latency_hist19:39:521
385699933,37cyclictest13206-21latency_hist19:39:521
385699933,33cyclictest23153-21fschecks_time21:40:111
384499935,54cyclictest15-21ksoftirqd/021:41:130
3864999257,12cyclictest181rcu_preempt22:30:102
385699923,32cyclictest5688-21fschecks_time19:04:551
385699914,30cyclictest18937-21unixbench_singl20:00:211
385699914,30cyclictest18937-21unixbench_singl20:00:211
385699913,34cyclictest18717-21cut23:20:091
385699913,34cyclictest18717-21cut23:20:091
385699913,33cyclictest30424-21netstat22:45:141
385699913,33cyclictest30424-21netstat22:45:141
385699913,33cyclictest16749-21ssh21:30:041
385699912,32cyclictest22426-21ssh00:20:001
384499914,50cyclictest15-21ksoftirqd/021:15:570
3856999040,42cyclictest0-21swapper/100:09:521
3856999040,42cyclictest0-21swapper/100:09:521
385699903,33cyclictest22937-21fschecks_count20:20:061
385699903,33cyclictest22937-21fschecks_count20:20:061
385699903,30cyclictest20212-21latency00:16:091
385699902,36cyclictest1547-21ntpq23:45:151
385699902,32cyclictest17081-21modprobe19:54:481
385699893,32cyclictest8915-21rm21:15:511
385699893,32cyclictest2410-21latency_hist21:04:511
385699893,31cyclictest29905-21tail21:50:261
3844998974,9cyclictest19912-21ssh21:35:060
3844998965,15cyclictest277-21dbus-daemon00:14:490
3844998916,44cyclictest15-21ksoftirqd/020:20:110
3844998916,44cyclictest15-21ksoftirqd/020:20:110
79322880,7sleep30-21swapper/323:55:243
387299883,50cyclictest0-21swapper/322:15:033
3864998856,10cyclictest181rcu_preempt19:20:132
386499883,52cyclictest39-21ksoftirqd/223:56:372
3856998835,48cyclictest0-21swapper/121:45:181
3856998835,47cyclictest352-21runrttasks22:42:291
385699883,35cyclictest4251-21sort23:50:081
385699882,33cyclictest9410-21/usr/sbin/munin23:05:211
385699882,33cyclictest9410-21/usr/sbin/munin23:05:211
387299872,42cyclictest0-21swapper/320:10:373
3856998770,13cyclictest19896-21kworker/u17:2+events_unbound20:10:041
385699873,32cyclictest27723-21fschecks_time20:40:061
385699873,31cyclictest10477-21latency_hist19:24:531
385699873,30cyclictest7061-21cpuspeed23:55:041
385699872,32cyclictest25189-21runrttasks20:29:511
385699872,32cyclictest25189-21runrttasks20:29:511
385699872,31cyclictest5000-21sort21:10:081
385699872,31cyclictest5000-21sort21:10:081
3856998723,11cyclictest0-21swapper/120:50:321
3856998718,10cyclictest0-21swapper/120:34:501
3864998628,20cyclictest0-21swapper/223:28:232
385699864,26cyclictest13882-21grep19:40:091
385699864,26cyclictest13882-21grep19:40:091
3856998634,44cyclictest0-21swapper/119:59:511
385699863,34cyclictest11026-21grep00:00:241
385699863,31cyclictest22498-21grep23:25:251
385699863,30cyclictest25449-21grep23:30:241
385699863,30cyclictest12181-21grep19:30:211
385699863,30cyclictest11137-21munin-run22:14:481
385699862,32cyclictest4580-21latency_hist21:09:521
239028621,39sleep30-21swapper/318:55:083
385699854,30cyclictest30465-21grep23:40:031
385699852,31cyclictest4199-21sendmail_mailtr22:55:201
385699852,31cyclictest4199-21sendmail_mailtr22:55:201
3856998515,23cyclictest7371-21grep19:10:171
3856998510,28cyclictest28188-21sendmail_mailtr23:35:211
3844998556,19cyclictest13368-21latency_hist19:39:520
3844998556,19cyclictest13368-21latency_hist19:39:520
384499855,54cyclictest15-21ksoftirqd/021:44:550
3844998525,31cyclictest15-21ksoftirqd/019:20:340
25472856,53sleep20-21swapper/218:55:152
387299845,39cyclictest0-21swapper/322:25:033
3864998463,15cyclictest31798-21latency_hist21:54:512
385699844,26cyclictest6423-21/usr/sbin/munin23:00:151
385699843,71cyclictest20085-21wc21:35:201
385699843,34cyclictest20280-21latency_hist20:09:511
385699843,34cyclictest20280-21latency_hist20:09:511
385699843,31cyclictest5747-21ssh22:05:111
385699843,31cyclictest26669-21taskset22:39:501
385699843,30cyclictest15425-21/usr/sbin/munin23:15:181
385699843,27cyclictest2396-21/usr/sbin/munin22:00:171
385699842,35cyclictest3117-21modprobe22:54:471
384499844,52cyclictest15-21ksoftirqd/019:08:170
384499842,47cyclictest15-21ksoftirqd/019:58:400
3864998363,14cyclictest32586-21netstat21:00:132
3864998362,16cyclictest17165-21latency_hist19:54:502
3864998350,12cyclictest181rcu_preempt22:29:172
385699834,32cyclictest29562-21latency_hist20:49:501
385699834,32cyclictest21205-21fschecks_time22:30:101
385699834,27cyclictest5467-21latency_hist19:04:511
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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