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2026-04-20 - 08:15
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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 Apr 20, 2026 00:44:30)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
24987213511,89sleep225077-21grep18:58:372
256219910864,37cyclictest27393-21ssh00:32:481
256179910842,27cyclictest25626-21latency_hist19:02:540
256179910755,43cyclictest12358-21ssh21:23:020
256219910443,9cyclictest0-21swapper/123:23:231
256219910438,12cyclictest0-21swapper/120:28:161
256219910438,12cyclictest0-21swapper/120:28:161
256179910445,22cyclictest20357-21sh00:19:260
256179910342,24cyclictest21722-21tune2fs20:28:130
256179910342,24cyclictest21722-21tune2fs20:28:130
256179910338,22cyclictest24335-21sh00:27:270
256219910144,8cyclictest0-21swapper/123:53:251
256219910144,8cyclictest0-21swapper/123:53:251
256219910132,13cyclictest0-21swapper/120:58:231
256179910147,50cyclictest0-21swapper/020:23:020
256179910141,29cyclictest24479-21latency_hist23:32:520
256179910141,29cyclictest24479-21latency_hist23:32:520
256179910140,37cyclictest882-21latency21:03:170
256179910034,23cyclictest0-21swapper/000:13:160
25621999936,12cyclictest0-21swapper/119:33:021
2562199993,48cyclictest6534-21sshd19:42:521
2562199993,39cyclictest24323-21cron23:32:481
2562199993,39cyclictest24323-21cron23:32:481
25617999944,44cyclictest9457-21apt-get22:12:490
25617999943,47cyclictest32530-21diskmemload22:05:460
25617999940,24cyclictest7073-21cpuspeed23:58:070
25617999939,22cyclictest8759-21memory19:48:180
25617999939,22cyclictest8759-21memory19:48:180
2562199985,36cyclictest3507-21idleruntime-cro22:02:491
25617999839,33cyclictest32530-21diskmemload23:03:020
2562199975,34cyclictest10217-21fschecks_time19:53:131
2562199974,39cyclictest15095-21cpu20:08:571
25621999742,13cyclictest9676-21munin-plugin-st23:07:511
25621999733,15cyclictest0-21swapper/119:28:221
25617999742,23cyclictest27749-21grep21:48:170
25617999739,23cyclictest311-21ssh23:46:420
25617999739,23cyclictest311-21ssh23:46:420
25617999738,23cyclictest29518-21ssh23:40:460
2562199964,42cyclictest28110-21fschecks_time19:08:151
2562199964,42cyclictest28110-21fschecks_time19:08:151
25621999637,13cyclictest0-21swapper/120:22:531
25617999640,17cyclictest26687-21grep20:43:150
25617999638,23cyclictest3837-21irqstats19:33:160
2562199953,28cyclictest12939-21/usr/sbin/munin22:18:131
2562199953,28cyclictest12939-21/usr/sbin/munin22:18:131
25617999550,38cyclictest1162-21ls21:58:120
25617999542,22cyclictest10060-21runrttasks22:13:050
25617999538,34cyclictest15677-21latency_hist22:22:520
25617999538,34cyclictest15677-21latency_hist22:22:520
2562199943,36cyclictest1589-21latency_hist19:27:531
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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