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2026-04-19 - 21:30
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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 Apr 19, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
27713210121,56sleep21-21systemd07:02:532
2370621010,2sleep2351irq_work/210:31:052
2370621010,2sleep2351irq_work/210:31:052
2669829810,61sleep026774-21cat06:58:230
27827999742,48cyclictest22066-21apt-key08:22:551
27823999750,9cyclictest181rcu_preempt10:57:120
27823999750,9cyclictest181rcu_preempt10:57:120
27835999652,12cyclictest1912-21ntp_kernel_pll_08:58:202
2782799943,35cyclictest4169-21/usr/sbin/munin10:53:121
2782799943,35cyclictest4169-21/usr/sbin/munin10:53:121
2782799942,36cyclictest21907-21ssh10:28:141
2782799942,36cyclictest21907-21ssh10:28:141
2783599939,53cyclictest39-21ksoftirqd/211:38:032
27827999268,16cyclictest10508-21apt-key07:47:551
2782799924,33cyclictest502-21/usr/sbin/munin09:53:131
27827999242,43cyclictest9186-21idleruntime-cro10:07:511
2782799922,37cyclictest14320-21rm11:08:281
2782399923,71cyclictest22300-21apt-get08:23:150
2782799916,64cyclictest7400-21apt-get10:59:001
2782799914,31cyclictest22301-21/usr/sbin/munin11:23:211
2782799914,31cyclictest22301-21/usr/sbin/munin11:23:211
27827999135,48cyclictest0-21swapper/112:18:291
27827999135,48cyclictest0-21swapper/112:18:291
27835999071,13cyclictest14066-21processes11:08:252
2782799904,32cyclictest13973-21/usr/sbin/munin07:58:221
2782799903,36cyclictest26969-21/usr/sbin/munin09:43:141
2782799903,33cyclictest9657-21awk09:13:191
2782799902,26cyclictest2957350munin-node07:07:561
27827998941,41cyclictest0-21swapper/110:23:211
2782799893,32cyclictest7057-21latency_hist07:37:531
2782799893,32cyclictest7057-21latency_hist07:37:531
2782799893,31cyclictest14005-21/usr/sbin/munin12:03:291
2782799893,27cyclictest19046-21fschecks_count08:13:141
27823998935,10cyclictest181rcu_preempt10:22:210
27835998827,28cyclictest27389-21apt-get08:38:172
27835998827,28cyclictest27389-21apt-get08:38:172
2782799884,33cyclictest31522-21unixbench_multi08:48:281
2782799883,67cyclictest11171-21ssh11:58:201
2782799883,67cyclictest11171-21ssh11:58:201
2782799883,34cyclictest22599-21fschecks_time08:23:371
2782799883,33cyclictest9779-21grep10:08:141
2782799883,33cyclictest9779-21grep10:08:141
2782799883,33cyclictest15818-21sort10:18:091
2782399884,43cyclictest15-21ksoftirqd/007:20:010
2782399883,71cyclictest11089-21rm11:58:060
2782399883,71cyclictest11089-21rm11:58:060
2782799877,69cyclictest27389-21apt-get08:38:161
2782799877,69cyclictest27389-21apt-get08:38:161
2782799874,32cyclictest22875-21latency_hist12:17:541
2782799873,35cyclictest2265-21timerwakeupswit08:58:271
27827998733,48cyclictest0-21swapper/109:08:191
27827998733,48cyclictest0-21swapper/109:08:191
2782799873,32cyclictest13124-21fschecks_count10:13:351
2782799873,31cyclictest3984-21latency_hist07:27:551
2782799873,29cyclictest30702-21awk09:48:251
2782799873,29cyclictest30702-21awk09:48:251
2782799872,33cyclictest2218-21basename11:43:151
2782799872,33cyclictest2218-21basename11:43:151
2782799872,32cyclictest19048-21taskset12:11:071
27823998747,31cyclictest30973-21grep08:48:170
2782799863,35cyclictest18891-21timerandwakeup09:28:271
2782799863,34cyclictest26904-21http08:37:521
2782799863,32cyclictest31618-21latency_hist12:32:541
2782799862,32cyclictest30642-21/usr/sbin/munin10:43:151
2782799862,32cyclictest23893-21/usr/sbin/munin08:28:191
2782799862,32cyclictest16979-21latency_hist08:07:541
27823998649,9cyclictest29825-21ssh12:28:280
27823998616,34cyclictest21569-21awk09:33:190
2783599853,56cyclictest11063-21apt-get11:58:232
2783599853,56cyclictest11063-21apt-get11:58:232
2782799853,35cyclictest28289-21/usr/sbin/munin11:33:091
2782799853,35cyclictest28289-21/usr/sbin/munin11:33:091
2782799853,34cyclictest8932-21head11:53:291
2782799853,34cyclictest8932-21head11:53:291
2782799853,34cyclictest6595-21fschecks_count09:09:011
2782799853,34cyclictest6595-21fschecks_count09:09:011
2782799853,32cyclictest32116-21latency07:13:171
2782799853,32cyclictest11709-21grep07:49:281
2782799853,30cyclictest5000-21grep07:28:281
2782799853,30cyclictest25980-21taskset12:23:031
2782799853,22cyclictest5556-21/usr/sbin/munin11:48:251
27827998524,53cyclictest0-21swapper/109:27:511
2782799852,37cyclictest14886-21taskset09:22:551
2782799852,37cyclictest14886-21taskset09:22:551
2782799852,33cyclictest32229-21/usr/sbin/munin08:53:271
27835998451,8cyclictest181rcu_preempt10:54:342
27835998451,8cyclictest181rcu_preempt10:54:342
2782799843,36cyclictest18663-21grep08:12:531
27827998433,44cyclictest30331-21cron08:47:511
2782799843,32cyclictest31356-21cpu11:38:091
27827998428,7cyclictest0-21swapper/110:48:131
27827998424,6cyclictest0-21swapper/111:18:021
27827998424,52cyclictest0-21swapper/111:17:551
2782799842,34cyclictest2252-21taskset07:22:541
27823998444,23cyclictest27367-21kworker/u18:2-flush-0:3209:18:250
27823998444,23cyclictest27367-21kworker/u18:2-flush-0:3209:18:250
2782799834,31cyclictest10669-21fschecks_time11:03:141
2782799834,31cyclictest10669-21fschecks_time11:03:141
2782799833,34cyclictest27004-21sshd10:36:541
2782799833,33cyclictest28950-21unixbench_singl07:03:281
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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