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2023-04-02 - 05:23

x86 Intel Celeron M @1500 MHz, Linux 5.15.32-rt39 (Profile)

Latency plot of system in rack #6, slot #5
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 -n -a0 -t1 -p99 -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 20 highest latencies:
System rack6slot5.osadl.org (updated Sun Apr 02, 2023 00:44:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
2389799102045125,5068cyclictest32074-21kworker/0:221:57:330
2389799101765307,4858cyclictest14076-21kworker/0:021:35:530
2389799100775166,4900cyclictest425-21kworker/0:020:42:300
238979997865077,4697cyclictest8871-21kworker/0:023:26:200
238979994114726,4670cyclictest425-21kworker/0:021:10:100
238979993854974,4368cyclictest425-21kworker/0:019:51:540
238979993454782,4559cyclictest9638-21kworker/0:122:15:270
238979993444694,4636cyclictest425-21kworker/0:021:01:370
238979993154672,4631cyclictest8871-21kworker/0:023:45:040
238979992104628,4572cyclictest8871-21kworker/0:023:40:320
238979990374637,4389cyclictest12630-21kworker/0:222:24:340
238979989234587,4325cyclictest22329-21kworker/0:200:33:120
238979989234540,4368cyclictest28448-21kworker/0:121:51:460
238979988824641,4226cyclictest425-21kworker/0:020:36:000
238979988794417,4410cyclictest10108-21kworker/0:119:26:550
238979988374541,4291cyclictest425-21kworker/0:021:18:540
238979987604502,4247cyclictest4214-21kworker/0:100:09:170
238979987394495,4233cyclictest32074-21kworker/0:222:10:500
238979986564448,4197cyclictest28770-21kworker/0:023:02:520
238979985784407,4167cyclictest32074-21kworker/0:222:06:200
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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