You are here: Home / Projects / OSADL QA Farm Real-time / Latency plots / 
2022-07-01 - 00:17

ARM Freescale i.MX6 Quad @996 MHz, Linux 4.19.100-bsp-yocto-i.mx6-pd20.1.0 (Profile)

Latency plot of system in rack #b, slot #3
Note that this system runs a non-RT kernel.
Data to construct the above plot have been generated using the RT test utility cyclictest.
Command line: cyclictest -l10000000 -m -n -a0 -t1 -p99 -i2000 -h4000 -q
Total number of samples: 10 million
Resolution of latency scale: reduced 
Duration: 5 hours, 33 minutes, lowest P state: performance
Compare latency of primary with shadow system
Characteristics of the 10 highest latencies:
System rbs3 (updated Sat Feb 19, 2022 00:43:53)
Delayed (victim)Switcher (culprit)TimestampCPU
PIDPrioTotal
latency
(µs)
T*(,W**)
latency
(µs)
CmdPIDPrioCmd
9118991471,28cyclictest9147-21latency_hist19:15:020
911899922,66cyclictest0-21swapper/019:30:020
911899922,66cyclictest0-21swapper/019:30:020
911899922,38cyclictest0-21swapper/020:11:110
911899902,46cyclictest12224-21apt20:20:010
911899902,45cyclictest0-21swapper/021:47:090
9118998960,19cyclictest10650irq/39-dwc_otg20:05:020
911899883,44cyclictest0-21swapper/020:55:020
9118998833,13cyclictest0-21swapper/021:18:230
9118998833,13cyclictest0-21swapper/021:18:230
*Timer  **Wakeup  (latency=timer+wakeup+contextswitch)

 

Valid XHTML 1.0 Transitional