Re: [ANNOUNCE] git-pasky-0.1

[Ingo Molnar]

* Willy Tarreau <willy@xxxxxxxxx> 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
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