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2025-05-03 - 02:00
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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 rack9slot2.osadl.org (updated Fri May 02, 2025 12:43:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
223722302265,25sleep20-21swapper/22
225782291254,24sleep00-21swapper/00
225912270208,50sleep30-21swapper/33
223212266197,52sleep10-21swapper/11
2279099236219,14cyclictest24722-21http3
2278199211193,16cyclictest24726-21nin-node1
2277599175153,20cyclictest24692-21munin-run0
2278599140119,18cyclictest0-21swapper/22
257192490,3sleep10-21swapper/11
280842460,3sleep10-21swapper/11
171162440,1sleep017119-21cpu0
94872380,1sleep10-21swapper/11
201502360,2sleep10-21swapper/11
22785993511,21cyclictest2501-21cat2
2278599332,28cyclictest23496-21cat2
2278599324,25cyclictest9668-21grep2
2278599321,28cyclictest15259-21munin-run2
22785993212,18cyclictest23789-21expr2
2278599320,29cyclictest10353-1kworker/2:2H2
22790993124,4cyclictest2348-21/usr/sbin/munin3
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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