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2026-05-17 - 13:38
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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 Sun May 17, 2026 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27951214010,102sleep00-21swapper/018:56:280
2788521229,73sleep127887-21diskstats18:56:251
292009911956,13cyclictest0-21swapper/122:51:021
292009911956,13cyclictest0-21swapper/122:51:021
1539221130,5sleep115366-21ssh00:01:041
292009910442,18cyclictest12409-21latency_hist23:56:031
292009910346,15cyclictest20146-21http22:21:051
291919910040,36cyclictest24784-21ssh21:33:240
2920099962,47cyclictest5778-21apt-get22:51:161
2920099962,47cyclictest5778-21apt-get22:51:161
2879329439,16sleep2181rcu_preempt18:57:452
29191999347,20cyclictest3356-21kworker/u18:2-events_unbound19:21:050
29191999267,17cyclictest13351-21latency_hist21:16:050
29191999049,8cyclictest181rcu_preempt19:06:040
29204998968,15cyclictest14776-21runrttasks23:59:402
29204998950,19cyclictest0-21swapper/222:09:242
29204998846,18cyclictest29183-21cyclictest21:48:452
29204998846,18cyclictest29183-21cyclictest21:48:452
29191998860,8cyclictest181rcu_preempt19:07:370
29191998859,21cyclictest0-21swapper/023:49:390
2919199883,42cyclictest15-21ksoftirqd/023:26:150
29204998769,13cyclictest29183-21cyclictest22:06:012
29204998743,8cyclictest181rcu_preempt00:06:022
29191998769,11cyclictest0-21swapper/022:41:310
29204998664,9cyclictest181rcu_preempt19:36:232
29204998640,9cyclictest181rcu_preempt23:11:002
2921199853,35cyclictest0-21swapper/322:51:273
2921199853,35cyclictest0-21swapper/322:51:273
29204998561,12cyclictest0-21swapper/220:46:032
29204998469,10cyclictest29183-21cyclictest19:26:042
29191998462,11cyclictest0-21swapper/020:06:260
29191998462,11cyclictest0-21swapper/020:06:260
29204998364,9cyclictest0-21swapper/223:31:402
29200998330,25cyclictest4381-21diskmemload00:11:041
29191998362,11cyclictest0-21swapper/019:31:350
29191998361,12cyclictest0-21swapper/020:26:220
29191998346,7cyclictest181rcu_preempt00:08:270
29191998343,17cyclictest0-21swapper/020:11:290
29204998260,13cyclictest0-21swapper/219:56:042
29204998260,10cyclictest0-21swapper/219:51:052
29204998260,10cyclictest0-21swapper/219:51:052
29204998259,14cyclictest17719-21ntp_kernel_pll_20:01:282
29204998238,9cyclictest181rcu_preempt20:17:062
29200998245,28cyclictest18544-21cron20:06:011
29191998266,11cyclictest29183-21cyclictest22:52:150
29191998266,11cyclictest29183-21cyclictest22:52:150
29191998263,9cyclictest0-21swapper/019:36:260
29191998260,9cyclictest181rcu_preempt20:21:240
29204998159,15cyclictest2374-21systemd-journal22:18:572
29204998145,8cyclictest181rcu_preempt23:37:572
29204998143,9cyclictest181rcu_preempt00:16:372
29200998153,9cyclictest181rcu_preempt23:27:211
29200998149,9cyclictest181rcu_preempt23:06:261
29191998163,11cyclictest29183-21cyclictest00:27:430
29191998143,7cyclictest181rcu_preempt22:16:410
29191998138,9cyclictest181rcu_preempt00:12:080
29204998064,10cyclictest5276-21latency_hist21:56:032
29204998060,10cyclictest0-21swapper/221:26:242
29200998060,13cyclictest0-21swapper/123:51:061
29200998054,17cyclictest27148-21/usr/sbin/munin20:31:271
29191998063,8cyclictest0-21swapper/021:56:380
29191998056,14cyclictest0-21swapper/021:26:260
29191998042,18cyclictest32256-21fschecks_time20:46:250
29191998040,18cyclictest58-21kcompactd000:04:170
29204997959,14cyclictest14287-21sh21:17:162
29204997959,14cyclictest14287-21sh21:17:162
29204997958,10cyclictest0-21swapper/221:21:252
29204997956,13cyclictest0-21swapper/222:56:372
29204997938,17cyclictest0-21swapper/219:29:402
29204997938,17cyclictest0-21swapper/219:29:402
29200997955,11cyclictest181rcu_preempt22:26:311
29200997946,13cyclictest14610-21ssh21:17:231
29200997946,13cyclictest14610-21ssh21:17:231
2920099793,41cyclictest23606-21diskstats21:32:191
29200997930,23cyclictest6331-21latency19:26:271
29200997930,23cyclictest6331-21latency19:26:271
29191997953,8cyclictest181rcu_preempt00:16:250
29191997942,7cyclictest181rcu_preempt21:17:280
29191997942,7cyclictest181rcu_preempt21:17:280
29191997941,8cyclictest181rcu_preempt19:26:340
29191997941,8cyclictest181rcu_preempt19:26:340
29200997842,8cyclictest181rcu_preempt20:06:341
29200997842,8cyclictest181rcu_preempt20:06:341
29191997858,13cyclictest21820-21ntp_kernel_pll_23:16:290
2921199774,42cyclictest0-21swapper/321:16:253
2921199774,42cyclictest0-21swapper/321:16:253
29204997761,10cyclictest8160-21runrttasks22:53:402
29204997761,10cyclictest8160-21runrttasks22:53:402
29204997759,10cyclictest0-21swapper/221:41:032
29204997758,9cyclictest0-21swapper/220:51:032
29204997757,14cyclictest4381-21diskmemload21:06:022
29200997740,13cyclictest58-21kcompactd020:17:111
29191997760,12cyclictest29183-21cyclictest21:24:560
29191997745,7cyclictest181rcu_preempt23:06:260
29191997744,8cyclictest181rcu_preempt22:06:570
29191997742,7cyclictest181rcu_preempt22:26:340
29191997722,7cyclictest181rcu_preempt22:46:300
29191997722,7cyclictest181rcu_preempt22:46:300
76512760,7sleep30-21swapper/323:46:393
29204997660,9cyclictest0-21swapper/200:11:302
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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