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2026-07-15 - 10:09
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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 Wed Jul 15, 2026 00:45:13)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
5847213190,20sleep032646-21kworker/u17:2+writeback18:57:430
59579914861,55cyclictest298-21in:imuxsock22:02:010
5957991193,41cyclictest11556-21cstates22:42:180
5957991193,41cyclictest11556-21cstates22:42:180
59579911334,11cyclictest0-21swapper/018:57:560
5957991122,27cyclictest25778-21modprobe22:12:000
59579911036,13cyclictest0-21swapper/023:57:000
59579911036,13cyclictest0-21swapper/023:57:000
59579911035,11cyclictest0-21swapper/022:07:020
5966991093,75cyclictest20852-21apt-get23:52:202
5966991093,75cyclictest20852-21apt-get23:52:202
59579910849,52cyclictest2374-21systemd-journal21:27:010
59579910846,10cyclictest13917-21ssh20:57:350
59579910749,53cyclictest4861-21kworker/u17:3+rpciod22:42:020
59579910735,14cyclictest0-21swapper/023:25:320
59579910735,14cyclictest0-21swapper/023:25:320
5957991073,44cyclictest27441-21vmstat23:07:410
5957991063,30cyclictest3762-21cstates00:17:160
5957991063,30cyclictest3762-21cstates00:17:160
59579910541,55cyclictest0-21swapper/019:52:040
5957991053,38cyclictest11193-21fschecks_count19:12:220
5957991044,36cyclictest11664-21/usr/sbin/munin23:37:280
5957991044,31cyclictest2630-21latency_hist23:22:030
5957991043,37cyclictest20999-21cstates19:42:180
59579910428,13cyclictest0-21swapper/000:07:340
5957991042,44cyclictest9366-21modprobe20:47:000
5957991034,40cyclictest22078-21latency_hist21:12:030
5957991023,41cyclictest29519-21fschecks_count23:12:220
5957991023,41cyclictest29519-21fschecks_count23:12:220
5957991023,40cyclictest26936-21switchtime22:12:360
5957991023,37cyclictest15734-21grep23:42:380
5957991023,37cyclictest15734-21grep23:42:380
5957991023,35cyclictest18336-21cat22:52:370
5957991023,35cyclictest18336-21cat22:52:370
5957991022,31cyclictest12192-21bash21:48:000
5957991022,31cyclictest12192-21bash21:48:000
59579910137,12cyclictest297-21systemd-logind20:17:010
5957991013,43cyclictest23085-21latency_hist23:02:020
5957991013,38cyclictest352-21runrttasks20:22:370
5957991013,35cyclictest12858-21fschecks_time19:17:220
5957991013,33cyclictest9479-21cstates19:07:180
5957991012,40cyclictest29793-21mailstats22:17:340
5957991012,40cyclictest29793-21mailstats22:17:340
5957991012,37cyclictest18123-21ssh23:47:280
5957991012,34cyclictest25333-21grep23:58:340
496821016,16sleep20-21swapper/218:53:422
5957991004,36cyclictest30478-21latency_hist20:12:030
59579910041,52cyclictest0-21swapper/000:02:250
5957991003,37cyclictest23413-21ls23:02:170
5957991003,37cyclictest23413-21ls23:02:170
5957991003,37cyclictest15578-21tr19:27:000
5957991003,36cyclictest25092-21unixbench_singl19:52:360
5957991003,26cyclictest31620-21sh21:27:200
5957999936,8cyclictest0-21swapper/019:38:470
595799993,37cyclictest28748-21lockfile-create20:07:000
595799993,35cyclictest17742-21idleruntime19:32:260
595799993,34cyclictest10644-21latency_hist21:47:050
595799993,33cyclictest11019-21latency_hist20:52:000
595799992,37cyclictest25243-21cpu21:17:170
595799992,37cyclictest25243-21cpu21:17:170
595799992,36cyclictest352-21runrttasks22:35:380
595799992,36cyclictest352-21runrttasks22:35:380
5966999821,42cyclictest39-21ksoftirqd/221:42:322
5957999840,9cyclictest12871-21diskmemload21:32:590
5966999774,17cyclictest17081-21latency_hist21:57:042
595799974,28cyclictest22183-21/usr/sbin/munin21:12:280
595799973,38cyclictest6459-21chrt20:37:340
595799973,35cyclictest5377-21idleruntime21:37:240
595799973,32cyclictest1596-21timerwakeupswit00:12:370
595799953,39cyclictest9317-21/usr/sbin/munin23:32:290
595799953,39cyclictest9317-21/usr/sbin/munin23:32:290
595799953,36cyclictest352-21runrttasks20:17:050
595799943,34cyclictest14537-21cstates22:47:170
5966999369,8cyclictest181rcu_preempt20:08:442
5966999356,14cyclictest181rcu_preempt21:40:192
595799932,36cyclictest25731-21/usr/sbin/munin19:57:370
595799923,33cyclictest6732-21cstates00:22:190
595799913,31cyclictest9082-21cron19:07:000
595799913,31cyclictest9082-21cron19:07:000
595799912,26cyclictest14797-21awk21:52:310
5961998859,20cyclictest8417-21fschecks_count19:02:471
5961998859,20cyclictest8417-21fschecks_count19:02:471
5961998758,20cyclictest17995-21sh21:57:391
5961998663,14cyclictest23205-21cpuspeed22:07:171
5966998551,9cyclictest181rcu_preempt22:32:462
5966998551,9cyclictest181rcu_preempt22:32:462
5966998544,11cyclictest181rcu_preempt19:42:252
5966998538,18cyclictest19676-21snmpd21:12:032
569528512,45sleep15658-21dpkg-deb18:57:411
5966998459,7cyclictest181rcu_preempt21:58:152
5966998445,9cyclictest181rcu_preempt22:20:392
5966998445,9cyclictest181rcu_preempt22:20:392
5966998438,13cyclictest181rcu_preempt22:03:402
5966998432,17cyclictest0-21swapper/223:02:022
5966998359,9cyclictest181rcu_preempt20:57:202
5966998352,9cyclictest181rcu_preempt00:12:332
5966998349,8cyclictest181rcu_preempt22:47:352
5966998335,14cyclictest181rcu_preempt23:25:402
5966998335,14cyclictest181rcu_preempt23:25:402
596699832,44cyclictest39-21ksoftirqd/223:15:502
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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