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2026-01-10 - 22:34
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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 Sat Jan 10, 2026 12:44:35)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1774521930,11sleep017750-21fschecks_count07:04:520
190609911558,12cyclictest12983-21latency_hist08:29:291
2770721050,3sleep0241irq_work/010:57:590
190609910286,10cyclictest15979-21munin-plugin-st08:39:251
190609910286,10cyclictest15979-21munin-plugin-st08:39:251
19060999447,10cyclictest181rcu_preempt09:09:411
19054999356,8cyclictest181rcu_preempt11:00:170
19054999153,9cyclictest181rcu_preempt07:35:020
19054999153,9cyclictest181rcu_preempt07:35:020
19054999044,22cyclictest181rcu_preempt09:47:290
19054999044,22cyclictest181rcu_preempt09:47:290
19063998973,10cyclictest30854-21ssh10:09:422
19063998973,10cyclictest30854-21ssh10:09:422
19060998966,16cyclictest19044-21cyclictest08:49:471
19054998916,41cyclictest15-21ksoftirqd/007:19:490
19054998857,11cyclictest181rcu_preempt09:00:250
19060998753,11cyclictest181rcu_preempt07:39:361
19060998753,11cyclictest181rcu_preempt07:39:361
19054998757,21cyclictest23394-21modprobe11:44:250
19054998757,21cyclictest23394-21modprobe11:44:250
19054998752,8cyclictest181rcu_preempt09:50:260
1905499873,46cyclictest15-21ksoftirqd/010:54:040
183362877,56sleep218410-21timerwakeupswit07:05:112
19054998546,10cyclictest181rcu_preempt09:35:150
19054998546,10cyclictest181rcu_preempt09:35:150
19060998443,9cyclictest0-21swapper/110:29:421
19054998452,11cyclictest181rcu_preempt10:02:500
19054998452,11cyclictest181rcu_preempt10:02:500
19054998449,7cyclictest181rcu_preempt12:32:450
19063998361,16cyclictest30235-21sh11:00:532
19054998261,15cyclictest6299-21latency_hist09:29:290
19054998261,15cyclictest6299-21latency_hist09:29:290
19054998259,8cyclictest181rcu_preempt11:26:310
19054998228,10cyclictest0-21swapper/011:52:040
19054998228,10cyclictest0-21swapper/011:52:040
1906399816,46cyclictest39-21ksoftirqd/210:16:522
1906399816,46cyclictest39-21ksoftirqd/210:16:522
19063998162,12cyclictest23740-21ntp_offset09:00:062
19063998151,8cyclictest181rcu_preempt08:17:282
1906399814,39cyclictest39-21ksoftirqd/210:54:362
19060998136,8cyclictest181rcu_preempt07:30:021
1906099812,44cyclictest1350-21/usr/sbin/munin10:14:411
1906099812,44cyclictest1350-21/usr/sbin/munin10:14:411
19054998155,10cyclictest20356-21sendmail11:39:250
19063998050,7cyclictest181rcu_preempt12:17:252
19063998050,7cyclictest181rcu_preempt12:17:252
19054998051,9cyclictest7953-21ssh11:18:540
19054998042,7cyclictest181rcu_preempt12:15:180
19054998042,7cyclictest181rcu_preempt12:15:180
19054998041,10cyclictest181rcu_preempt07:49:420
1905499802,67cyclictest21563-21apt-get08:54:400
1905499802,67cyclictest21563-21apt-get08:54:400
19054998023,22cyclictest0-21swapper/010:41:280
19063997958,15cyclictest23177-21proc_pri10:49:582
19060997955,18cyclictest803-21sendmail-mta09:35:031
19060997955,18cyclictest803-21sendmail-mta09:35:031
19054997957,16cyclictest1103-21latency_hist10:14:280
19054997957,16cyclictest1103-21latency_hist10:14:280
19054997944,8cyclictest181rcu_preempt08:19:270
19054997942,8cyclictest181rcu_preempt08:24:380
1905499793,48cyclictest15-21ksoftirqd/008:39:420
19063997859,13cyclictest1040-21unixbench_singl07:50:022
19063997856,16cyclictest298-21in:imuxsock09:24:122
19063997855,16cyclictest20356-21sendmail11:39:252
1906399784,29cyclictest39-21ksoftirqd/209:09:592
19063997841,16cyclictest181rcu_preempt11:21:412
19063997821,35cyclictest39-21ksoftirqd/209:34:032
19060997855,15cyclictest0-21swapper/108:49:251
19060997852,20cyclictest352-21runrttasks08:14:411
19060997850,14cyclictest181rcu_preempt10:37:471
19060997850,14cyclictest181rcu_preempt10:37:471
19060997847,13cyclictest181rcu_preempt09:17:111
19060997847,13cyclictest181rcu_preempt09:17:111
19054997844,8cyclictest181rcu_preempt12:05:370
19054997843,8cyclictest181rcu_preempt10:25:240
19063997757,14cyclictest30085-21sh11:54:502
19060997747,11cyclictest181rcu_preempt11:44:391
19054997733,14cyclictest0-21swapper/008:08:380
19054997733,14cyclictest0-21swapper/008:08:380
19063997660,9cyclictest23501-21ssh09:57:122
1906399762,36cyclictest39-21ksoftirqd/208:58:522
1906399762,36cyclictest39-21ksoftirqd/208:58:522
19060997652,15cyclictest6177-21latency_hist12:09:291
19060997638,11cyclictest181rcu_preempt11:24:571
19060997637,8cyclictest181rcu_preempt11:34:521
1906099762,45cyclictest23452-21fschecks_time08:59:541
19054997660,10cyclictest2155-21ssh11:09:270
19054997660,10cyclictest2155-21ssh11:09:270
19054997658,12cyclictest300-21rs:main0
19054997658,12cyclictest300-21rs:main0
19054997657,13cyclictest13086-21idleruntime-cro10:34:250
19054997656,7cyclictest181rcu_preempt11:57:190
19054997640,9cyclictest181rcu_preempt09:23:340
19054997640,8cyclictest0-21swapper/009:05:010
19054997640,8cyclictest0-21swapper/009:05:010
19054997632,9cyclictest0-21swapper/011:20:190
19054997632,14cyclictest0-21swapper/008:30:590
19063997556,12cyclictest27728-21ssh10:04:412
19063997532,21cyclictest39-21ksoftirqd/212:06:192
19063997519,26cyclictest39-21ksoftirqd/209:44:202
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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