You are here: Home / Projects / QA Farm Realtime / Latency plots / 
2022-01-23 - 09:36

Intel(R) Xeon(R) CPU E31220 @ 3.10GHz, Linux 4.16.15-rt7 (Profile)

Latency plot of system in rack #b, slot #1
Data to construct the above plot have been generated using the RT test utility cyclictest.
Unexpectedly long latencies may be caused by SMIs
Command line: cyclictest -l100000000 -m -Sp99 -i200 -h400 -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 10 highest latencies:
System rackbslot1.osadl.org (updated Sun Jan 23, 2022 00:44:03)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
275222590,1sleep10-21swapper/123:45:201
71482570,0sleep00-21swapper/023:10:220
2238125544,7sleep10-21swapper/119:06:361
2271025443,7sleep30-21swapper/319:09:343
2249925038,7sleep00-21swapper/019:07:400
2184524836,7sleep20-21swapper/219:05:292
89412450,0sleep00-21swapper/020:30:370
23682170,0sleep30-21swapper/321:15:133
22877991614,1cyclictest23066-21snmpd21:58:372
62152150,1sleep06167-31munin-html21:20:300
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional