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2026-04-19 - 20:08
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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 50 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
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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