Re: [ANNOUNCE] git-pasky-0.1

Ingo Molnar
2005-04-10T17:45:51Z

* Willy Tarreau <willy@w.ods.org> wrote:

> > > I will also need to do more testing on the linux kernel tree.
> > > Committing patch-2.6.7 on 2.6.6 kernel and then diffing results in
> > >
> > > $ time gitdiff.sh `parent-id` `tree-id` >p
> > > real 5m37.434s
> > > user 1m27.113s
> > > sys 2m41.036s
> > >
> > > which is pretty horrible, it seems to me. Any benchmarking help is of
> > > course welcomed, as well as any other feedback.
> >
> > it seems from the numbers that your system doesnt have enough RAM for
> > this and is getting IO-bound?
>
> Not the only problem, without I/O, he will go down to 4m8s (u+s) which
> is still in the same order of magnitude.

probably not the only problem - but if we are lucky then his system was
just trashing within the kernel repository and then most of the overhead
is the _unnecessary_ IO that happened due to that (which causes CPU
overhead just as much). The dominant system time suggests so, to a
certain degree. Maybe this is wishful thinking.

Ingo