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2026-08-22 - 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 100 highest latencies:
System rackbslot7.osadl.org (updated Sat Aug 22, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
12603213912,87sleep212604-21cron19:10:002
12058212215,65sleep112124-21cat19:05:471
127609911531,12cyclictest0-21swapper/023:00:100
127609911433,12cyclictest0-21swapper/021:57:230
127609911414,78cyclictest29789-21apt-get22:15:260
127609911414,78cyclictest29789-21apt-get22:15:260
127609911148,56cyclictest13351-21ntp_kernel_pll_23:30:280
127609910828,11cyclictest0-21swapper/023:10:270
127609910828,11cyclictest0-21swapper/023:10:270
127609910732,9cyclictest0-21swapper/021:00:230
127609910732,11cyclictest0-21swapper/020:35:030
127609910543,54cyclictest0-21swapper/019:50:040
12760991054,34cyclictest23001-21cat19:40:040
127609910537,11cyclictest0-21swapper/000:31:460
127609910537,11cyclictest0-21swapper/000:18:090
12760991053,44cyclictest9854-21fschecks_time23:25:210
12760991053,44cyclictest9854-21fschecks_time23:25:210
12760991053,33cyclictest27848-21modprobe19:54:590
12760991043,38cyclictest16884-21cat23:35:350
127609910419,28cyclictest3646-21cat23:15:260
127749910383,14cyclictest3692-21sh21:35:022
127749910383,14cyclictest3692-21sh21:35:022
12760991034,43cyclictest4644-21timerandwakeup22:25:350
12760991034,35cyclictest3715-21latency_hist21:35:010
12760991034,35cyclictest3715-21latency_hist21:35:010
127609910334,8cyclictest0-21swapper/021:40:300
127609910239,14cyclictest29939-21proc_pri23:05:330
127609910234,9cyclictest0-21swapper/019:40:160
12760991023,31cyclictest350-21runrttasks00:13:530
127609910231,15cyclictest0-21swapper/022:50:280
12760991022,40cyclictest20722-21fschecks_count21:10:210
12760991022,34cyclictest12492-21sort20:45:200
127609910058,33cyclictest1516-21kworker/u17:2+events_unbound22:14:590
12760991004,31cyclictest31098-21modprobe20:05:000
127609910037,8cyclictest0-21swapper/023:45:030
127609910036,7cyclictest0-21swapper/022:35:170
12760991003,35cyclictest16789-21fschecks_count19:20:200
12760991003,33cyclictest350-21runrttasks22:58:520
12760991003,33cyclictest13376-21latency_hist21:50:030
1276099993,37cyclictest22848-21sh22:05:000
1276099993,37cyclictest22848-21sh22:05:000
1276099993,34cyclictest20001-21grep19:30:210
1276099993,33cyclictest25091-21sh00:39:590
1276099993,33cyclictest25091-21sh00:39:590
1276099993,33cyclictest22585-21cut23:45:200
1276099993,33cyclictest22585-21cut23:45:200
1276099992,34cyclictest30269-21fschecks_count21:25:200
12760999840,51cyclictest0-21swapper/022:30:260
1276099983,35cyclictest18770-21/usr/sbin/munin21:05:320
1276099983,33cyclictest31895-21/usr/sbin/munin00:00:100
12760999831,10cyclictest0-21swapper/000:25:310
1276099974,30cyclictest6206-21processes20:25:320
1276099974,30cyclictest6206-21processes20:25:320
1276099973,34cyclictest31723-21taskset20:05:260
1276099973,34cyclictest31723-21taskset20:05:260
12765999649,40cyclictest11002-21ssh21:45:311
1276099963,35cyclictest19766-21latency_hist19:30:030
1276099963,34cyclictest13290-21grep19:10:250
1276099963,34cyclictest12976-21cut00:20:580
1276099963,33cyclictest28664-21/usr/sbin/munin23:55:230
1276099963,31cyclictest3974-21latency_hist20:20:040
1276099962,34cyclictest2292-21latency_hist20:15:030
12760999613,74cyclictest9150-21runrttasks20:36:020
12765999536,49cyclictest21375-21latency_hist19:35:041
1276099953,36cyclictest6829-21cut23:20:250
1276099953,35cyclictest17448-21timerwakeupswit22:45:350
1276099953,34cyclictest13871-21netstat22:40:270
1276099953,33cyclictest15197-21fschecks_count19:15:240
1276099952,37cyclictest3305-21/usr/sbin/munin00:05:310
1276099952,37cyclictest3305-21/usr/sbin/munin00:05:310
12765999341,44cyclictest0-21swapper/119:20:261
12765999341,44cyclictest0-21swapper/100:20:481
12765999333,8cyclictest0-21swapper/123:59:591
1276099933,33cyclictest10944-21fschecks_time20:40:250
1276099933,31cyclictest25643-21cstates23:50:160
12760999330,19cyclictest15548-21kworker/u17:1+nfsiod21:15:320
1276099932,34cyclictest4744-21ssh21:35:330
12765999232,8cyclictest0-21swapper/120:20:361
12765999232,8cyclictest0-21swapper/120:20:361
12765999232,51cyclictest0-21swapper/123:30:371
1276599922,29cyclictest31947-21sshd22:18:141
1276599922,29cyclictest31947-21sshd22:18:141
1276099922,34cyclictest14412-21ntp_kernel_err20:50:280
12774999145,16cyclictest181rcu_preempt21:17:582
1277499913,51cyclictest39-21ksoftirqd/220:00:322
1276599915,72cyclictest19043-21apt-get00:30:141
12765999139,45cyclictest350-21runrttasks21:43:261
12765999138,46cyclictest11504-21timerandwakeup20:40:381
12765999133,8cyclictest0-21swapper/122:05:011
12765999133,8cyclictest0-21swapper/122:05:011
12765999131,8cyclictest0-21swapper/119:30:031
1276099913,29cyclictest350-21runrttasks21:52:050
12765999071,13cyclictest10086-21/usr/sbin/munin22:35:321
12765999043,39cyclictest0-21swapper/123:50:211
12765999036,47cyclictest0-21swapper/121:39:161
12765999032,51cyclictest0-21swapper/122:25:321
12765999027,7cyclictest0-21swapper/121:55:321
12765999025,11cyclictest0-21swapper/121:05:341
1276099904,36cyclictest4711-21switchtime20:20:340
1276099904,36cyclictest4711-21switchtime20:20:340
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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