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2026-03-19 - 11:21
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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 Thu Mar 19, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
102149913033,28cyclictest0-21swapper/023:05:100
974321207,17sleep00-21swapper/019:00:580
8727211250,17sleep1181rcu_preempt19:00:091
10214991094,31cyclictest22223-21timerwakeupswit22:05:330
10214991094,31cyclictest22223-21timerwakeupswit22:05:330
102149910850,10cyclictest10756-21ntp_kernel_pll_23:35:260
102149910850,10cyclictest10756-21ntp_kernel_pll_23:35:260
102149910844,9cyclictest0-21swapper/023:45:180
102279910151,42cyclictest0-21swapper/223:00:232
102279910051,41cyclictest300-21rs:main2
102279910051,41cyclictest300-21rs:main2
10214999726,25cyclictest7896-21apt-get00:25:150
10214999726,25cyclictest7896-21apt-get00:25:150
10227999641,42cyclictest0-21swapper/220:45:012
10227999640,33cyclictest181rcu_preempt23:15:002
1021899963,38cyclictest7395-21ssh21:40:341
1021899963,38cyclictest7395-21ssh21:40:341
10227999548,40cyclictest0-21swapper/221:30:322
10227999447,40cyclictest0-21swapper/221:54:552
10227999264,19cyclictest1468-21apt-key00:15:012
1022799915,59cyclictest23916-21apt-get21:15:132
10227999140,41cyclictest0-21swapper/221:40:002
1022799913,8cyclictest0-21swapper/220:45:132
10218999150,34cyclictest22225-21timerwakeupswit22:05:331
10218999150,34cyclictest22225-21timerwakeupswit22:05:331
10227999048,34cyclictest0-21swapper/222:00:232
10227999048,34cyclictest0-21swapper/222:00:232
10227999046,36cyclictest0-21swapper/220:15:262
10227999044,38cyclictest0-21swapper/223:30:002
10227998845,36cyclictest29879-21latency_hist22:20:002
1022799883,74cyclictest19006-21latency_hist19:30:012
10227998747,33cyclictest17340-21diskmemload22:46:042
10227998740,38cyclictest0-21swapper/222:55:332
1022799872,34cyclictest23174-21ssh21:14:322
10227998646,11cyclictest181rcu_preempt23:55:012
10227998642,37cyclictest0-21swapper/222:37:252
10227998639,38cyclictest0-21swapper/200:00:222
1022799863,35cyclictest31292-21/usr/sbin/munin22:20:352
1022799863,31cyclictest24764-21cut23:05:192
1022799863,31cyclictest21011-21fschecks_time19:35:202
10218998645,33cyclictest0-21swapper/119:26:031
1021899864,36cyclictest18778-21latency22:00:231
1021899864,36cyclictest18778-21latency22:00:231
10218998636,36cyclictest32260-21apt-get20:10:261
1021899863,30cyclictest25915-21rm21:18:051
10227998544,33cyclictest0-21swapper/220:25:302
10227998544,33cyclictest0-21swapper/220:25:302
1022799854,27cyclictest17590-21runrttasks22:53:082
1022799854,27cyclictest17590-21runrttasks22:53:082
1022799853,27cyclictest15558-21runrttasks20:58:042
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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