Reduce cpu usage

[kkettinger]

Hello,

i'm planing on using three webcams on a raspberry pi, but noticed that even when reducing the framerate to "1", the cpu usage is very high (>100%) even for only one webcam.

Is there anyway to reduce the cpu usage? Thanks in advance.

Kevin

[vladimirvivien]

@kkettinger CPU usage should not be > 100%.
We did have a memory leak issue in an older version, but that was resolved.

• Which version of the project are you using?

[kkettinger]

Hello @vladimirvivien,

i'm using go version go1.20.1 linux/arm and the simplecam example (018089c) on a raspberry pi 4. The go.mod uses version v0.0.5.

$ ps -p 2388 -o %cpu,%mem,cmd
%CPU %MEM CMD
 135  0.2 ./simplecam

$ uname -a
Linux rpidev 5.15.84-v7l+ #1613 SMP Thu Jan 5 12:01:26 GMT 2023 armv7l GNU/Linux
$ lsb_release -a
No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 11 (bullseye)
Release:        11
Codename:       bullseye

[vladimirvivien]

Thans @kkettinger
Apologies for the late reply.
Although I don't have a Pi 4 readily available (price still about $145 to get one 😭 )
I will run on Pi 3 to see if I can reproduce that same behavior.

[kkettinger]

@vladimirvivien No worries :)
Yes, if i had a spare i could sent it to you, but the one i have is currently in use in a project. It's a bummer that they are so pricey nowadays!

[vladimirvivien]

@kkettinger finally has time to resume looking into this (and was able to find a rpi4 this summer).