Re: [gentoo-amd64] Re: Unexpected side effect of GCC 4

[Peter Humphrey <prh@gotadsl.co.uk>]

On Monday 06 November 2006 12:59, Hemmann, Volker Armin wrote:
> On Monday 06 November 2006 13:49, Jack Lloyd wrote:
> > On Mon, Nov 06, 2006 at 01:05:31PM +0100, Hemmann, Volker Armin wrote:
> > > lets ask the other way round. Why should it speed up anything to have
> > > X>number of cores?
> >
> > To account for I/O wait states
>
> and how often does something wait for io and how often does some data is
> purged from the cache, because the other make instance is activated?

The best way to find out is to test in your own circumstances.

> When I switched from j2 to j1, compiling did not take any longer - but
> the box way much more usable.

Whereas when I changed from j3 to j5 on my 2 CPUs, compiling seemed to take 
less time and I didn't notice any effect on responsiveness.

-- 
Rgds
Peter
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