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2022-10-04 - 03:01

x86 AMD 1950X @3700 MHz, Linux 5.10.47-rt46 (Profile)

Latency plot of system in rack #c, slot #8
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
Compare latency of primary with shadow system
Characteristics of the 20 highest latencies:
System rackcslot8.osadl.org (updated Mon Oct 03, 2022 12:48:45)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2279913230,315ptp4l0-21swapper/107:08:441
112199927475,1cyclictest151rcu_preempt09:34:024
231191229220,6phc2sys0-21swapper/207:05:1912
112519917033,101cyclictest0-21swapper/1708:10:259
112519916433,72cyclictest0-21swapper/1707:57:049
112869915453,67cyclictest0-21swapper/2209:45:3715
111869914630,106cyclictest0-21swapper/810:34:3630
111869914630,106cyclictest0-21swapper/810:34:3630
11233991450,91cyclictest0-21swapper/1407:23:236
11263991440,89cyclictest0-21swapper/1909:27:2411
111869914427,94cyclictest0-21swapper/810:18:3430
111869914427,94cyclictest0-21swapper/810:18:3430
112339914347,62cyclictest0-21swapper/1410:30:556
112339914347,62cyclictest0-21swapper/1410:30:556
112139914351,90cyclictest0-21swapper/1111:40:203
111869914324,117cyclictest0-21swapper/807:50:3430
11160991430,88cyclictest0-21swapper/411:15:2726
11233991420,81cyclictest0-21swapper/1408:50:166
111869914227,64cyclictest0-21swapper/810:45:0230
111869914227,64cyclictest0-21swapper/810:45:0230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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