You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-07-01 - 00:19

x86 Intel Core i5-8265UE @1600 MHz, Linux 5.10.41-rt42 (Profile)

Latency plot of system in rack #a, 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 10 highest latencies:
System rackaslot8.osadl.org (updated Thu Jun 30, 2022 12:44:24)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
300372295271,15sleep00-21swapper/007:08:050
302122294268,16sleep20-21swapper/207:10:002
300072291257,21sleep10-21swapper/107:07:421
301442271238,21sleep30-21swapper/307:09:203
211672640,0sleep30-21swapper/312:24:373
152802630,0sleep20-21swapper/211:37:202
46102600,0sleep10-21swapper/110:25:191
287082590,0sleep00-21swapper/011:03:260
122882580,0sleep30-21swapper/311:56:473
36292530,0sleep10-21swapper/111:30:021
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional