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2026-09-23 - 02:22
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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 Tue Sep 22, 2026 12:44:33)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2818821089,72sleep228278-21sed07:05:382
2942121030,6sleep00-21swapper/010:44:100
522321020,9sleep20-21swapper/210:58:342
287419910159,32cyclictest0-21swapper/012:14:170
287419910159,32cyclictest0-21swapper/012:14:170
287489910082,11cyclictest731-21sendmail12:38:411
2874899993,36cyclictest8472-21chrt07:44:101
28753999769,20cyclictest2399-21apt-key10:53:462
28748999741,49cyclictest22448-21timerandwakeup12:19:151
28748999440,48cyclictest0-21swapper/111:08:411
28748999358,30cyclictest28730-21cyclictest08:54:041
2874199937,59cyclictest15-21ksoftirqd/011:09:020
28741999264,19cyclictest5790-21timerwakeupswit07:34:170
28741999165,20cyclictest24701-21latency_hist09:43:440
272412916,57sleep026760-21apt-get07:03:530
28748999043,40cyclictest10082-21fschecks_count09:19:051
28748999042,40cyclictest0-21swapper/110:58:421
2874899893,36cyclictest17762-21/usr/sbin/munin11:19:071
2874899893,36cyclictest17762-21/usr/sbin/munin11:19:071
28741998929,38cyclictest0-21swapper/011:14:180
2874899883,31cyclictest28635-21grep08:44:141
28741998857,22cyclictest21308-21netstat11:24:090
28753998760,21cyclictest11801-21apt-get11:09:022
28753998732,14cyclictest0-21swapper/211:49:092
2874899874,34cyclictest6150-21rm10:05:151
2874899874,31cyclictest3974-21sendmail_mailqu07:29:141
2874899874,31cyclictest3974-21sendmail_mailqu07:29:141
2874899873,41cyclictest25574-21processes09:44:151
2874899873,41cyclictest25574-21processes09:44:151
2874899873,33cyclictest1983-21fschecks_count09:59:031
2874899873,33cyclictest1983-21fschecks_count09:59:031
2874899873,30cyclictest31947-21sh09:55:131
28748998667,12cyclictest3322-21sh11:48:451
28748998667,12cyclictest3322-21sh11:48:451
28748998665,15cyclictest20807-21threads10:29:221
2874899864,31cyclictest26429-21/usr/sbin/munin08:38:531
2874899864,31cyclictest26429-21/usr/sbin/munin08:38:531
28748998637,41cyclictest0-21swapper/112:03:591
2874899863,37cyclictest13275-21grep11:10:261
2874899863,37cyclictest10734-21ssh10:13:571
2874899863,36cyclictest26933-21/usr/sbin/munin11:33:581
2874899863,33cyclictest10605-21grep12:00:091
2874899863,32cyclictest18885-21timerandwakeup08:14:171
2874899863,32cyclictest13006-21latency_hist07:58:451
2874899863,31cyclictest6403-21/usr/sbin/munin11:54:051
2874899863,31cyclictest4149-21ps11:49:181
2874899863,31cyclictest22890-21ssh09:39:171
2874899863,30cyclictest29010-21grep09:49:221
2874899863,29cyclictest10977-21grep07:49:181
2874199864,71cyclictest1357-21cron09:58:410
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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