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2025-10-16 - 10:04
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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 rackeslot6.osadl.org (updated Thu Oct 16, 2025 00:44:58)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
278631699136116,14cyclictest2799368-21latency_hist19:50:010
278631999128112,14cyclictest2795918-21latency_hist19:40:011
27863199910897,8cyclictest2892374-21latency_hist00:40:011
27863199910796,8cyclictest2839949-21kworker/u8:1+flush-179:022:40:211
27863169910796,7cyclictest601706-21systemd-journal00:04:030
27863199910696,7cyclictest2851394-21latency_hist22:35:001
27863199910695,9cyclictest2792992-21apt-get19:30:131
27863169910694,9cyclictest2867854-21latency_hist23:25:010
27863169910292,8cyclictest2858020-21apt-get22:55:100
27863169910088,9cyclictest2809178-21latency_hist20:20:010
2786316999988,9cyclictest2871286-21apt-get23:35:090
2786319999888,7cyclictest2786134-21kworker/u8:2+flush-179:019:10:221
2786319999888,7cyclictest2786134-21kworker/u8:2+flush-179:019:10:221
2786319999786,9cyclictest2788206-21apt-get19:15:131
2786316999583,10cyclictest2861476-21apt-get23:05:120
2786319999284,6cyclictest2810793-21apt-get20:25:011
2786316999180,9cyclictest2816088-21apt-get20:40:140
2786316999180,9cyclictest2816088-21apt-get20:40:130
2786316998980,7cyclictest2850060-21apt-get22:30:120
2786319998882,4cyclictest2819038-21kworker/u8:1+flush-179:021:15:231
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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