You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2023-06-04 - 23:35

x86 Intel Core i3-2100T @2500 MHz, Linux 4.14.28-rt23 (Profile)

Latency plot of system in rack #0, slot #0
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 --smi -q
Total number of samples: 100 million
Resolution of latency scale: normal
Duration: 5 hours, 33 minutes, lowest P state: performance
Characteristics of the 10 highest latencies:
System rack0slot0.osadl.org (updated Sun Jun 04, 2023 12:45:20)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
1210121390,0sleep40-21swapper/410:14:494
2124221370,4sleep2733099cyclictest10:44:532
1905721230,0sleep00-21swapper/012:20:450
741721120,4sleep5735299cyclictest10:27:415
146032990,0sleep30-21swapper/309:53:413
184252930,1sleep30-21swapper/311:48:433
219802810,0sleep00-21swapper/009:11:380
39832800,0sleep50-21swapper/509:47:245
7832790,0sleep60-21swapper/611:28:346
201512790,0sleep30-21swapper/309:14:123
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional