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2022-10-04 - 09:03

x86 Intel Atom E3845 @1915 MHz, Linux 4.19.37-rt20 (Profile)

Latency plot of system in rack #b, slot #6
Data to construct the above plot have been generated using the RT test utility cyclictest.
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 rackbslot6.osadl.org (updated Tue Oct 04, 2022 00:43:32)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
91191940,4ptp4l401ktimersoftd/322:26:273
274632730,1sleep10-21swapper/100:21:081
91191700,1ptp4l401ktimersoftd/302:11:453
91191660,1ptp4l401ktimersoftd/303:42:343
110652640,1sleep20-21swapper/200:43:342
159642630,4sleep0576699cyclictest00:49:460
53352614,9sleep20-21swapper/222:26:322
42742600,2sleep30-21swapper/301:51:043
278372600,2sleep127836-21apt01:41:031
91191580,1ptp4l401ktimersoftd/302:09:173
91191560,1ptp4l401ktimersoftd/303:34:083
318092560,2sleep00-21swapper/002:21:530
91191550,1ptp4l401ktimersoftd/323:20:053
91191550,1ptp4l401ktimersoftd/323:20:053
319522540,2sleep20-21swapper/201:45:492
223082540,2sleep322309-21sh01:34:183
55412534,10sleep10-21swapper/122:29:101
91191510,1ptp4l401ktimersoftd/302:38:023
94722450,1sleep10-21swapper/122:36:161
91191450,1ptp4l401ktimersoftd/301:21:483
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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