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2025-11-25 - 02:54
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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 Mon Nov 24, 2025 12:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
15047212111,79sleep215072-21munin-run07:09:142
152219910885,15cyclictest12744-21latency_hist08:39:172
15221999776,12cyclictest0-21swapper/211:34:342
15213999678,8cyclictest0-21swapper/107:59:391
15221999574,11cyclictest0-21swapper/207:19:382
15221999573,12cyclictest0-21swapper/207:59:362
15221999573,12cyclictest0-21swapper/207:14:382
15213999577,8cyclictest0-21swapper/110:39:361
15213999577,8cyclictest0-21swapper/110:39:361
15213999571,13cyclictest0-21swapper/109:04:501
15221999472,12cyclictest0-21swapper/211:09:372
15221999472,12cyclictest0-21swapper/211:09:372
15203999361,23cyclictest23537-21latency_hist12:09:170
141862938,59sleep014210-21awk07:04:470
15221999272,10cyclictest0-21swapper/210:24:152
15221999270,16cyclictest15855-21switchtime11:54:502
142772928,58sleep114276-21ntp_states07:04:521
1520399903,69cyclictest1009-21apt-get10:29:300
1520399902,53cyclictest23755-21ssh12:09:340
1520399902,53cyclictest23755-21ssh12:09:340
15221998974,7cyclictest0-21swapper/210:49:452
15221998973,7cyclictest0-21swapper/208:09:382
15221998973,7cyclictest0-21swapper/208:09:382
15221998950,10cyclictest181rcu_preempt08:59:292
15221998950,10cyclictest181rcu_preempt08:59:292
15203998950,8cyclictest181rcu_preempt11:04:160
15203998938,17cyclictest207-21systemd-journal12:32:050
1520399886,44cyclictest15-21ksoftirqd/010:24:470
15203998810,32cyclictest15-21ksoftirqd/011:59:470
15221998753,8cyclictest181rcu_preempt09:04:472
15203998712,41cyclictest15-21ksoftirqd/010:22:490
15203998711,50cyclictest15-21ksoftirqd/007:24:360
15221998670,10cyclictest16966-21munin-node07:29:482
1520399862,42cyclictest22731-21awk09:09:310
15221998550,7cyclictest181rcu_preempt07:24:492
15221998548,9cyclictest181rcu_preempt09:39:312
15203998557,19cyclictest16807-21latency_hist07:14:160
15203998557,19cyclictest16807-21latency_hist07:14:160
1520399852,36cyclictest26666-21ssh10:17:170
15221998460,7cyclictest181rcu_preempt11:48:202
15221998449,7cyclictest181rcu_preempt09:12:292
15221998442,7cyclictest181rcu_preempt10:28:202
15213998459,16cyclictest17244-21systemd-run10:59:141
15213998459,16cyclictest17244-21systemd-run10:59:141
1520399847,40cyclictest15-21ksoftirqd/007:53:130
15203998457,7cyclictest181rcu_preempt11:34:550
15203998455,7cyclictest181rcu_preempt08:12:350
15203998455,7cyclictest181rcu_preempt08:12:350
15221998368,9cyclictest17778-21cpu08:54:292
15221998345,10cyclictest181rcu_preempt12:08:412
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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