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Re: [adam@flounder.net: Re: testing and no release schedule]

Matthias Urlichs wrote:
> Hi, Ingo Juergensmann wrote:
> > However, I'm quite "confused" about those "This is a buildd, please do not
> > use it for manual builds!" motds on some machines. Makes no sense to me.
> Context switches eat into those machines' cache, thus two compile jobs in
> parallel run N times slower than the same compile jobs in sequence.

Context switches don't eat any interesting amount of performance
on the usual buildd hardware. And quite on the contrary, parallel
compiler runs tend to be faster even on a UP machine with enough
ram, because the disk I/O is scheduled better.

> Makes perfect sense to me.  ;-)

The limited amount of ram/disk resources is more of a reason.


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