[rrd-users] Re: differing disk i/o behavior for rrd update

Tobias Oetiker oetiker at ee.ethz.ch
Tue Feb 28 20:05:58 MET 2006

Hi Christian,

I guess they will both be using mmap at least als long as it is the
same binary ... (mmap or not is a compiletime decision) ...

in gprof output you will see how much time is spent in which
function ...


Today Christian Smyth wrote:

> > I do unfortunately not have much gprof experiance myself ...
> Tobi,
> No problemo.  I will have a look and see what I can do.
> However, can you please indicate to me what you are looking for in the
> gprof output?  Are you looking for oldbox's rrdtool to be not using
> mmap(), while newbox's is?  Or something else?  If you give me a general
> idea of what particular needle I am hunting for, I can possibly process
> this haystack a bit more quickly :-)
> -cls

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