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2026-09-13 - 09:58
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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 Sun Sep 13, 2026 00:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
30220214611,101sleep030221-21/usr/sbin/munin19:04:290
316969910547,11cyclictest0-21swapper/122:34:381
31003210110,24sleep131-21ksoftirqd/119:05:031
31696999977,14cyclictest14827-21awk00:04:541
31696999563,23cyclictest2947-21latency_hist19:19:221
31696999346,12cyclictest28408-21kworker/u17:0-ext4-rsv-conversion00:04:221
31696999346,12cyclictest28408-21kworker/u17:0-ext4-rsv-conversion00:04:221
31700998961,21cyclictest27541-21sh00:26:272
31700998865,16cyclictest5267-21sh22:54:572
3169699883,65cyclictest12735-21kworker/u19:1+ext4-rsv-conversion20:04:461
3038528812,44sleep30-21swapper/319:04:403
31700998770,11cyclictest317-21dbus-daemon23:24:212
31700998770,11cyclictest317-21dbus-daemon23:24:212
31696998769,12cyclictest10820-21munin-run23:59:211
31696998753,11cyclictest615-21kworker/u17:2-ext4-rsv-conversion19:29:241
31692998758,19cyclictest14296-21latency_hist19:54:230
31700998669,11cyclictest29008-21runrttasks21:45:562
31696998652,22cyclictest19837-21latency_hist00:14:231
31696998652,22cyclictest19837-21latency_hist00:14:231
31700998565,11cyclictest1-21systemd22:37:402
3169299853,60cyclictest10786-21awk23:59:190
31700998468,11cyclictest31685-21cyclictest19:44:232
31692998453,20cyclictest32058-21sh00:34:410
31696998365,12cyclictest317-21dbus-daemon21:34:211
31692998345,30cyclictest17975-21ssh00:10:010
31692998345,30cyclictest17975-21ssh00:10:010
31692998341,10cyclictest31685-21cyclictest00:16:550
31696998255,19cyclictest29438-21fschecks_count20:39:391
31696998245,20cyclictest181rcu_preempt23:29:401
31692998251,26cyclictest58-21kcompactd022:14:410
31692998238,8cyclictest181rcu_preempt21:39:230
31696998159,8cyclictest181rcu_preempt21:59:431
31692998134,9cyclictest181rcu_preempt23:34:560
31700998059,15cyclictest28647-21sh23:34:372
31696998043,9cyclictest181rcu_preempt19:49:351
31696998043,19cyclictest0-21swapper/100:19:311
31696998043,19cyclictest0-21swapper/100:19:311
31692998046,10cyclictest181rcu_preempt19:59:300
31692998036,7cyclictest181rcu_preempt23:11:470
31692998036,7cyclictest181rcu_preempt23:11:470
31692998018,35cyclictest181rcu_preempt23:48:190
31700997962,11cyclictest1251-21ssh22:49:192
31700997958,13cyclictest1-21systemd20:59:492
31700997958,13cyclictest1-21systemd20:59:492
31700997950,21cyclictest6197-21cron21:09:192
31700997933,31cyclictest17086-21grep22:19:562
31700997933,31cyclictest17086-21grep22:19:562
31696997959,14cyclictest29803-21timerandwakeup00:30:001
31692997952,8cyclictest181rcu_preempt00:20:330
31692997952,8cyclictest181rcu_preempt00:20:330
31700997856,16cyclictest21826-21latency_hist22:29:222
31700997821,36cyclictest0-21swapper/223:42:442
31696997853,17cyclictest6225-21diskmemload21:55:021
31696997848,13cyclictest20391-21sh00:14:481
31692997855,17cyclictest18443-21apt-key21:29:220
31692997855,15cyclictest6225-21diskmemload22:54:560
31692997854,18cyclictest2062-21latency_hist23:44:230
31692997840,8cyclictest181rcu_preempt21:10:530
31692997840,8cyclictest181rcu_preempt21:10:530
31692997839,8cyclictest181rcu_preempt23:04:430
31692997838,9cyclictest181rcu_preempt23:49:480
31692997838,9cyclictest181rcu_preempt23:49:480
31692997827,21cyclictest181rcu_preempt00:04:220
31692997827,21cyclictest181rcu_preempt00:04:220
31692997826,11cyclictest181rcu_preempt21:54:430
3170599777,44cyclictest0-21swapper/320:04:373
31700997753,16cyclictest31685-21cyclictest23:04:192
3170099773,54cyclictest18321-21apt-get21:29:342
31700997721,9cyclictest0-21swapper/221:39:552
31700997721,9cyclictest0-21swapper/221:39:552
31696997757,13cyclictest10345-21mailstats21:14:561
31696997755,12cyclictest0-21swapper/120:29:481
31696997755,12cyclictest0-21swapper/120:29:481
3169699772,26cyclictest24332-21latency_hist20:24:241
31692997747,19cyclictest200-21systemd-journal22:26:390
31692997728,14cyclictest0-21swapper/020:14:370
3170599763,34cyclictest8126-21chrt22:04:573
31700997655,14cyclictest9551-21/usr/sbin/munin21:14:502
31700997652,11cyclictest0-21swapper/223:04:572
31696997652,10cyclictest181rcu_preempt23:15:241
31696997649,19cyclictest23584-21sh22:31:101
31696997649,19cyclictest23584-21sh22:31:101
31696997631,33cyclictest7674-21modprobe19:34:201
31696997626,11cyclictest181rcu_preempt22:39:311
31696997626,11cyclictest181rcu_preempt22:39:311
31692997644,9cyclictest30138-21ssh00:30:240
31692997638,13cyclictest181rcu_preempt21:59:310
31692997615,37cyclictest3004-21basename20:59:200
3170599752,36cyclictest22035-21chrt23:23:463
3170599752,36cyclictest22035-21chrt23:23:463
31700997550,17cyclictest25319-21sh23:29:222
3170099754,37cyclictest7689-21apt19:34:202
31700997514,21cyclictest6846-21cut21:09:432
31700997514,21cyclictest6846-21cut21:09:432
31696997545,10cyclictest181rcu_preempt23:35:381
3169299756,35cyclictest15-21ksoftirqd/022:44:370
31692997554,15cyclictest4456-21ssh22:54:240
31692997554,14cyclictest27375-21latency_hist21:44:230
31692997554,14cyclictest27375-21latency_hist21:44:230
31692997551,15cyclictest29766-21ssh21:48:050
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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