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2025-07-14 - 22:53
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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 20 highest latencies:
System rackbslot7.osadl.org (updated Mon Jul 14, 2025 12:44:31)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
26619213615,85sleep026711-21unixbench_singl07:01:370
27040211716,59sleep227065-21munin-run07:05:472
27183991023,75cyclictest17750-21apt-get12:31:110
271839910162,8cyclictest181rcu_preempt10:12:460
27199999944,47cyclictest0-21swapper/210:35:482
27199999841,13cyclictest356-21runrttasks09:21:562
27199999836,13cyclictest0-21swapper/211:11:072
27199999836,13cyclictest0-21swapper/211:11:072
271112989,60sleep127119-21ls07:05:501
27199999640,50cyclictest29081-21latency_hist10:55:482
2719999963,32cyclictest31753-21latency_hist11:00:482
27199999576,15cyclictest27174-21cyclictest12:06:122
27199999576,15cyclictest27174-21cyclictest12:06:122
2719999953,38cyclictest27189-21ssh11:51:022
2719999953,38cyclictest14249-21grep10:26:292
2719999953,38cyclictest14249-21grep10:26:292
2719999953,33cyclictest24891-21uname11:46:222
2719999953,31cyclictest22392-21grep11:41:252
2719999953,29cyclictest19168-21grep08:16:242
27199999527,12cyclictest0-21swapper/212:31:352
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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