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2025-07-01 - 04:00
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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 rackbslot7.osadl.org (updated Tue Jul 01, 2025 00:44:40)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
19852215614,120sleep019900-21cstates19:02:020
2116221289,79sleep221166-21latencyplot19:06:452
2100021200,6sleep00-21swapper/022:47:150
21228991113,23cyclictest32291-21/usr/sbin/munin00:06:570
212289910956,48cyclictest21219-21cyclictest23:27:150
212289910956,48cyclictest21219-21cyclictest23:27:150
212289910753,46cyclictest0-21swapper/022:02:490
212289910753,46cyclictest0-21swapper/022:02:490
534621060,6sleep05340-21ntp_states21:22:130
212289910650,50cyclictest3883-21ssh22:17:090
212289910646,53cyclictest10041-21apt-key21:31:430
212289910644,53cyclictest31371-21latency_hist21:11:450
212289910643,55cyclictest0-21swapper/021:47:170
212289910643,55cyclictest0-21swapper/021:47:170
20354210667,22sleep120402-21grep19:02:241
21228991053,27cyclictest15876-21sh22:37:280
212289910347,48cyclictest0-21swapper/023:26:440
21228991033,41cyclictest9166-21apt-get22:26:550
21228991033,41cyclictest9166-21apt-get22:26:550
21228991023,27cyclictest26376-21ls22:57:060
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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