[fpc-devel] building fpc / fpmake and multicore cpu ?

Mattias Gaertner nc-gaertnma at netcologne.de
Sat Oct 1 12:56:06 CEST 2011


On Sat, 01 Oct 2011 09:24:08 +0100
Martin <lazarus at mfriebe.de> wrote:

> I noticed, when I build fpc, then I get cpu usage between 70% and 100%. 
> So it appears that both cores of my pentium are used.

No, it can simply mean that the OS moves the process around, which can
for example reduce cooling power.

 
> But when a package is compiled using fpmake, then it drops to 50%, so 
> apparently only one core is used?
> 
> Is that correct? Does the old Makefile driven compilation use both/all 
> cores, while packages done via fpmake, are using one core only?

AFAIK the makefile does not use parallel compilation.

Mattias



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