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2023-02-06 - 14:22

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 Feb 06, 2023 00:50:06)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2279912910,276ptp4l0-21swapper/119:05:121
8839924548,0cyclictest155-21ksoftirqd/2300:04:4216
231191196188,6phc2sys0-21swapper/219:05:1312
682991442,140cyclictest151rcu_preempt00:01:410
8159914242,99cyclictest0-21swapper/1422:49:186
908991410,85cyclictest0-21swapper/2919:39:5122
752991370,82cyclictest0-21swapper/1000:23:502
867991360,83cyclictest0-21swapper/2023:27:4013
815991350,82cyclictest0-21swapper/1422:02:176
815991350,82cyclictest0-21swapper/1422:02:166
7349913533,73cyclictest0-21swapper/723:10:0129
682991350,90cyclictest0-21swapper/000:05:210
9089913442,54cyclictest0-21swapper/2923:43:3122
682991340,116cyclictest0-21swapper/019:55:400
7189913329,67cyclictest0-21swapper/519:29:5027
7189913328,73cyclictest0-21swapper/523:35:2427
7189913327,65cyclictest0-21swapper/520:45:1027
7189913231,67cyclictest0-21swapper/521:15:0627
7189913231,67cyclictest0-21swapper/521:15:0527
7189913230,76cyclictest0-21swapper/521:46:3827
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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