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2025-11-20 - 10:56
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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 Thu Nov 20, 2025 00:44:29)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
112179912353,12cyclictest0-21swapper/223:55:082
112179912353,12cyclictest0-21swapper/223:55:082
11042212115,71sleep111065-21munin-plugin-st19:09:311
11042212115,71sleep111065-21munin-plugin-st19:09:311
11210991122,48cyclictest9177-21ssh22:55:091
11210991122,48cyclictest9177-21ssh22:55:091
112109911147,19cyclictest19880-21kworker/u17:1+events_unbound20:19:311
112179911044,15cyclictest0-21swapper/220:59:342
11222991053,84cyclictest9074-21taskset22:54:523
11222991053,84cyclictest9074-21taskset22:54:523
112179910542,18cyclictest23592-21fschecks_count22:24:512
112179910253,10cyclictest7225-21idleruntime23:44:592
11217991023,64cyclictest9584-21apt-get21:04:552
1121099973,63cyclictest24470-21apt-get00:14:451
1121099973,63cyclictest24470-21apt-get00:14:451
11210999478,9cyclictest11300-21kworker/u17:3-rpciod00:35:121
1121799923,66cyclictest25011-21apt-get00:14:462
1121799923,66cyclictest25011-21apt-get00:14:462
1121799922,66cyclictest9054-21ssh22:54:482
1121799922,66cyclictest9054-21ssh22:54:482
1121099923,64cyclictest20614-21apt-get23:14:451
1121099923,64cyclictest20614-21apt-get23:14:451
11217999059,13cyclictest181rcu_preempt23:22:362
11202999047,26cyclictest2370-21modprobe20:44:310
11217998971,11cyclictest24775-21kworker/u17:2-xprtiod22:34:552
11210998761,18cyclictest1-21systemd23:12:041
11210998761,18cyclictest1-21systemd23:12:041
989828610,52sleep29910-21fschecks_count19:05:002
989828610,52sleep29910-21fschecks_count19:05:002
11217998623,30cyclictest0-21swapper/200:30:172
11210998545,20cyclictest0-21swapper/119:59:511
11210998461,17cyclictest3992-21ssh00:34:331
11217998360,16cyclictest11192-21cyclictest20:59:552
11217998355,20cyclictest355-21runrttasks21:49:492
11202998350,11cyclictest181rcu_preempt21:25:560
11202998350,11cyclictest181rcu_preempt21:25:560
11210998263,12cyclictest0-21swapper/121:05:281
1121799812,57cyclictest1036-21apt-get20:39:572
11210998144,15cyclictest181rcu_preempt21:19:561
11210998127,30cyclictest2640-21sh23:37:011
1121099812,60cyclictest27370-21apt-get23:24:461
11217998057,13cyclictest0-21swapper/220:09:312
11217998055,14cyclictest0-21swapper/220:45:242
11210998059,15cyclictest14153-21idleruntime-cro22:09:311
11210998059,15cyclictest14153-21idleruntime-cro22:09:311
11202998058,15cyclictest30658-21sh23:29:540
11202998047,11cyclictest11192-21cyclictest21:34:330
974527922,34sleep30-21swapper/319:04:523
974527922,34sleep30-21swapper/319:04:523
11217997957,12cyclictest0-21swapper/223:53:052
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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