Re: libgtop2

[Manuel Menal <mmenal@hurdfr.org>]

Marcus Brinkmann wrote:
> At Wed, 11 May 2005 01:41:31 +0200,
> Manuel Menal <mmenal@hurdfr.org> wrote:

> >  - I can't find a way to get  statistics  about CPU usage 
> > (user/sys/kernel times, etc.),
> >    i.e. what you get in /proc/stat with Linux.

> Check out libps, which is part of the Hurd.

Sure, I've been using libps all through the port. I know it can give a
"CPU usage" info, but libgtop2 wants exactly the user, nice, system,
idle times, but libps does not provide that, AFAICS.

> Right, I don't think Mach gives this info.  But if you had a task id,
> there is a function to convert task ids into pids in the proc
> interface (just FYI).  I don't actually see what you'd want to have
> this info for anyway.

As I said in my previous reply to Alfred, I was confused about that
particular requirement. It was the last PID created, as I believed
originally, that libgtop wants to know, which should not be a
problem using libps.

> I don't know what IP accounting is.

Well, it's what you get with ifconfig (or /proc/net/dev) in Linux.
Like, the number of received/sent packets/bytes, errors,
collissions, things like that. Drivers keep count of them already
(rx_errors, rx_bytes, tx_packets, etc.). The code is mostly
there in <gnumach/linux/dev/core/dev.c:sprintf_stats>.
Adding an interface that would return a struct to user space,
instead of putting it under /proc, wouldn't be hard, would it?

Thanks,

--
Manuel Menal