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2026-05-18 - 20:02
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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 May 18, 2026 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1783921629,20sleep00-21swapper/006:56:210
1783921629,20sleep00-21swapper/006:56:210
191589910660,39cyclictest0-21swapper/112:20:441
19158999966,13cyclictest3851-21ssh10:11:111
1915899977,79cyclictest27945-21apt-get10:51:101
1915899977,79cyclictest27945-21apt-get10:51:101
190682979,60sleep119092-21latency_hist07:00:591
190682979,60sleep119092-21latency_hist07:00:591
176552947,64sleep20-21swapper/206:56:072
176552947,64sleep20-21swapper/206:56:072
19158999367,18cyclictest10126-21latency_hist08:10:591
19149999252,8cyclictest181rcu_preempt09:56:330
19149999252,8cyclictest181rcu_preempt09:56:330
19158999072,11cyclictest7735-21fschecks_time11:11:161
19158998937,12cyclictest0-21swapper/107:06:431
19158998937,12cyclictest0-21swapper/107:06:431
19149998973,9cyclictest18425-21ssh12:21:580
19162998817,31cyclictest15748-21cut09:36:212
19162998759,21cyclictest27900-21kworker/u19:0+nfsiod11:11:172
19162998636,28cyclictest0-21swapper/212:20:342
19162998463,14cyclictest19909-21kworker/u17:3-rpciod09:51:212
19162998415,32cyclictest23801-21grep08:51:172
19162998415,32cyclictest23801-21grep08:51:172
1914999844,51cyclictest15-21ksoftirqd/011:05:290
1916299837,32cyclictest0-21swapper/209:58:512
1916299837,32cyclictest0-21swapper/209:58:512
19162998324,26cyclictest30951-21taskset09:06:342
19162998319,26cyclictest2469-21runrttasks07:46:152
19162998319,26cyclictest2469-21runrttasks07:46:152
19162998317,33cyclictest2043-21ls07:45:552
19162998315,33cyclictest21159-21munin-node07:06:012
19162998315,33cyclictest21159-21munin-node07:06:012
19158998363,14cyclictest31849-21fschecks_time07:37:151
19158998325,11cyclictest0-21swapper/107:31:111
19149998363,14cyclictest15755-21kernelversion09:36:210
19162998257,16cyclictest352-21runrttasks10:52:202
19162998257,16cyclictest352-21runrttasks10:52:202
19162998214,32cyclictest24566-21cat10:45:582
19162998214,32cyclictest24566-21cat10:45:582
19158998263,12cyclictest2374-21systemd-journal09:10:561
19158998251,9cyclictest181rcu_preempt07:21:111
1914999826,39cyclictest15-21ksoftirqd/007:21:210
1817728223,33sleep30-21swapper/306:56:323
1817728223,33sleep30-21swapper/306:56:323
19162998113,34cyclictest1764-21fschecks_time11:01:172
19158998157,15cyclictest5249-21rm12:01:211
19158998132,12cyclictest181rcu_preempt08:47:211
19149998165,12cyclictest19140-21cyclictest09:06:150
19149998156,17cyclictest20962-21apt-key07:05:590
19162998026,19cyclictest26576-21sh09:00:552
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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