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2026-03-18 - 08:19
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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 Wed Mar 18, 2026 00:44:28)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2665821240,7sleep2371rcuc/222:40:292
1297621180,6sleep30-21swapper/322:17:573
266569911030,63cyclictest29559-21apt-get23:40:160
26671991047,87cyclictest32283-21apt-get22:51:062
266569910444,28cyclictest6521-21ssh23:00:330
266569910444,28cyclictest6521-21ssh23:00:330
26671991022,68cyclictest30110-21apt-get23:40:162
26671991013,68cyclictest18950-21apt-get00:15:162
26671991013,68cyclictest18950-21apt-get00:15:162
26678991002,58cyclictest0-21swapper/300:15:173
26678991002,58cyclictest0-21swapper/300:15:173
26656999938,34cyclictest16126-21seq23:16:010
26656999739,30cyclictest16041-21seq22:23:090
26656999739,30cyclictest16041-21seq22:23:090
26656999631,31cyclictest0-21swapper/021:10:150
2666799952,27cyclictest8841-21seq19:47:261
2666799943,56cyclictest32195-21apt-get21:00:131
2666799943,56cyclictest32195-21apt-get21:00:131
26656999431,38cyclictest0-21swapper/022:02:500
2667199933,58cyclictest22172-21apt-get00:20:162
26656999343,42cyclictest28688-21awk20:50:010
26656999342,43cyclictest21412-21/usr/sbin/munin23:25:290
26656999339,21cyclictest19266-21seq22:28:480
26656999334,24cyclictest31756-21seq19:19:030
26656999332,35cyclictest16628-21ssh21:30:210
26656999327,27cyclictest29981-21runrttasks20:51:140
2666799923,50cyclictest26669-21sed19:05:061
26656999257,23cyclictest22467-21ssh21:40:160
26656999242,43cyclictest19791-21ssh23:22:550
26656999242,43cyclictest19791-21ssh23:22:550
26656999241,21cyclictest13734-21unixbench_multi00:05:380
26656999233,29cyclictest352-21runrttasks22:16:480
26656999229,41cyclictest0-21swapper/022:41:080
26656999168,15cyclictest200-21systemd-journal21:07:160
26656999140,41cyclictest22172-21apt-get00:20:280
26656999139,23cyclictest9763-21latency19:51:180
26656999139,23cyclictest9763-21latency19:51:180
26656999136,41cyclictest0-21swapper/020:05:150
26656999135,29cyclictest1209-21ssh23:45:280
26656999135,29cyclictest1209-21ssh23:45:280
26656999132,34cyclictest0-21swapper/022:07:200
2666799903,47cyclictest13904-21latency_hist20:05:051
2666799903,42cyclictest23866-21ssh23:30:141
2666799903,42cyclictest23866-21ssh23:30:141
26656999070,14cyclictest25397-21fschecks_count00:25:250
26656999041,39cyclictest5153-21/usr/sbin/munin19:35:340
26656999015,34cyclictest0-21swapper/020:58:400
26656998954,24cyclictest18950-21apt-get00:15:290
26656998954,24cyclictest18950-21apt-get00:15:290
26656998940,39cyclictest31187-21ssh21:55:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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