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2025-11-28 - 04:49
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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 Fri Nov 28, 2025 00:44:27)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2830622580,13sleep028309-21latency19:04:330
293679911855,12cyclictest9695-21ssh21:18:220
293679911855,12cyclictest9695-21ssh21:18:220
29367991153,76cyclictest10783-21apt-get23:09:590
2920621156,16sleep10-21swapper/119:08:591
29367991053,76cyclictest28406-21apt-get22:44:190
2937999983,73cyclictest28472-21ssh22:44:232
280602989,62sleep228115-21fschecks_time19:04:272
2937999953,68cyclictest7291-21apt-get21:14:162
2937999953,68cyclictest7291-21apt-get21:14:162
29367999561,10cyclictest181rcu_preempt20:59:200
29367999339,29cyclictest29082-21rm21:49:400
29367999266,18cyclictest26132-21kworker/u19:3+events_unbound23:53:590
29379999158,8cyclictest181rcu_preempt21:09:222
2936799912,79cyclictest25418-21ssh22:39:330
29379999055,9cyclictest181rcu_preempt23:14:002
29379999039,15cyclictest181rcu_preempt20:14:242
29379998936,15cyclictest181rcu_preempt23:49:272
29367998945,7cyclictest181rcu_preempt23:02:540
29371998870,12cyclictest292-21dbus-daemon20:24:011
2936799882,35cyclictest29765-21grep19:09:220
29379998632,22cyclictest19289-21ssh23:24:022
29379998632,22cyclictest19289-21ssh23:24:022
29367998668,13cyclictest18604-21latency_hist00:19:020
29367998653,13cyclictest181rcu_preempt20:29:340
2936799864,29cyclictest19685-21cstates23:24:180
29379998554,10cyclictest181rcu_preempt22:26:542
29379998554,10cyclictest181rcu_preempt22:26:542
29379998453,8cyclictest181rcu_preempt19:39:432
29379998452,8cyclictest181rcu_preempt23:38:572
29379998449,8cyclictest181rcu_preempt20:44:022
29379998448,8cyclictest181rcu_preempt23:54:102
2937999844,61cyclictest21980-21apt-get20:24:222
29379998445,11cyclictest29355-21cyclictest19:20:272
29379998445,11cyclictest29355-21cyclictest19:20:272
2936799844,36cyclictest3802-21diskmemload00:09:230
29379998358,16cyclictest10511-21kworker/u17:2-xprtiod00:09:302
29379998350,8cyclictest181rcu_preempt22:19:012
29379998349,9cyclictest181rcu_preempt00:31:042
29367998354,21cyclictest0-21swapper/019:29:350
29367998354,21cyclictest0-21swapper/019:29:350
29367998336,11cyclictest181rcu_preempt20:24:300
29379998255,8cyclictest181rcu_preempt22:04:272
29379998253,8cyclictest181rcu_preempt23:49:002
29379998253,8cyclictest181rcu_preempt19:28:092
29379998253,8cyclictest181rcu_preempt19:28:092
29379998241,9cyclictest181rcu_preempt19:09:122
29371998264,11cyclictest20247-21unixbench_singl22:29:381
29367998249,7cyclictest181rcu_preempt23:40:390
29379998147,8cyclictest181rcu_preempt22:40:092
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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