[arch-general] most efficient way to get linux kernel statistics

[Jonathan Horacio Villatoro Córdoba]

On Sun, Mar 06, 2016 at 05:13:37PM +0100, Florian Pelz wrote:
> On 03/06/2016 04:47 PM, Jonathan Horacio Villatoro Córdoba wrote:
> > On Sun, Mar 06, 2016 at 03:23:33PM +0100, Andre Schmidt wrote:
> >> hello archers,
> >>
> >> thought i ask here first, before i try some kernel mailing list.
> >>
> >> i'm writing (for fun) a tiny daemon that sends linux usage (cpu, mem, net, etc.) statistics as efficiently as possible to another machine, repeatedly, to get "live" data.
> >>
> >> at the moment i'm simply sending /proc files, but they sometimes have too much data. so was wondering if there is a more efficient way to get (only parts of) the data thats available in /proc?
> >>
> >> for example, /proc/meminfo has all this info:
> >>
> >> […]
> >>
> >> if /proc is the only way to get this info, i wonder if creating a kernel module for this would be more efficient, or even possible?
> > 
> > Hello Andre,
> > 
> > According to what you need, you may want to use the 'free' command
> > instead, as its output is much simpler than the output of the
> > /proc/meminfo file
> > 
> > […]
> > 
> 
> Hello,
> 
> The free command gets its information from /proc/meminfo.
> Performance-wise, it doesn't really matter if a few additional lines
> need to be parsed.

Hello,
Thank you Florian. Actually, I already knew it's the same, I just
thought that he could use the free command instead of parsing it
himself. You're right. Performance-wise, it's pretty much the same.