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2023-06-06 - 17:42

x86 Intel Core i7-3770K @3500 MHz, Linux 5.15.49-rt47 (Profile)

Latency plot of system in rack #0, slot #2
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 -a4-7 -p99 -i200 -h400 -t4 -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 rack0slot2.osadl.org (updated Tue Jun 06, 2023 12:43:37)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
236882725848,6sleep50-21swapper/504:21:385
236896925347,4sleep40-21swapper/404:23:304
236012324538,4sleep60-21swapper/604:19:156
25151422430,0sleep40-21swapper/405:23:514
23686992433,36sleep70-21swapper/704:19:567
236934199170,16cyclictest1047-21snmpd06:10:037
236933299160,16cyclictest0-21swapper/509:48:295
236933299160,16cyclictest0-21swapper/509:48:295
236933299160,16cyclictest0-21swapper/507:13:315
2369340991514,1cyclictest0-21swapper/609:14:426
236934099150,14cyclictest2585421-21Xorg09:07:556
2369332991515,0cyclictest0-21swapper/509:13:575
236933299150,0cyclictest0-21swapper/508:53:375
236933299150,0cyclictest0-21swapper/507:22:205
236933299150,0cyclictest0-21swapper/506:39:185
2369330991515,0cyclictest0-21swapper/409:05:174
2369330991515,0cyclictest0-21swapper/408:14:224
2369330991515,0cyclictest0-21swapper/408:11:514
2369330991515,0cyclictest0-21swapper/407:09:534
236933099150,15cyclictest0-21swapper/407:22:494
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

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