You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-02-07 - 19:14

x86 Intel Core i7-2600K @3400 MHz, Linux 5.9.0-rc2-rt1 (Profile)

Latency plot of system in rack #4, slot #6
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 -h200 -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 rack4slot6.osadl.org (updated Tue Feb 07, 2023 12:44:44)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
10885521360,118pltrace0-21swapper/207:06:262
13699521290,125pltrace0-21swapper/607:08:106
10885521080,98pltrace0-21swapper/307:06:493
699352950,1pltrace6998-21pltrace-run09:32:401
1607152760,0pltrace0-21swapper/511:57:405
1378827357,12sleep50-21swapper/507:08:515
244732710,0sleep50-21swapper/510:25:185
1364727155,12sleep10-21swapper/107:07:111
123812670,0sleep10-21swapper/111:20:181
213662640,1sleep09-21ksoftirqd/009:13:020
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional