Hi y'all,
I have some questions about CPU load and performance, but first some
background information.
We have small embedded system running an openembedded classic (Angström)
distro. Now to get ourselves up-to-date we started working on a new
iteration of the OS based on openembedded core and Yocto. It is nearly
finished now, if it weren't for one problem: The CPU load
(/proc/loadavg) of the core/yocto based OS is more than double that of
the classic/Angström OS.
So the way I see it this could be caused by a number of factors:
- loadavg's calculation changed
- certain newer versions of applications run heavier
- The kernel itself is heavier (we upgraded from 2.6.35.14+ to 4.9.28+)
- Possibly caused by some configs
- ...
My question: is there something that changed since OE-classic that you
know could be the cause of this? If not, how would I go about finding
the cause? I don't think the top command is sufficient for this, because
it's precision is such that many processes' CPU usage just become 0%.
Also, both top and htop cause huge cpu loads themselves.
Any tips and tricks would be welcome!
Thanks in advance!
Ryan
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