Chapter 5 GCC nit

Joshua Murphy poisonbl at gmail.com
Tue Aug 2 10:37:56 PDT 2005


just going by the numbers then, and that pass 1 is ~3 times the work,
11 is far too much, but does g++ actually add that much to the compile
time? ... granted i don't recall make test taking more than about
20-30 mins (3-4) SBU on my box ... so i guess 14 with the tests does
fall around the same mark as 11 without ... though i must admit that i
never really timed the full build of pass 2 ... i generally sleep
and/or eat dinner while i run that one ...

On 8/2/05, Ken Moffat <ken at kenmoffat.uklinux.net> wrote:
> On Mon, 1 Aug 2005, Randy McMurchy wrote:
> 
> > Hi all,
> >
> > A minor nit I noticed in the Chapter 5 GCC instructions (all versions):
> >
> > Noted in the SBU times between Pass 1 and Pass 2 is that they seem to
> > be reversed. Pass 1 is shown to be 4.4 SBU and Pass 2 is 11.0. Shouldn't
> > these be the other way around?
> >
> > My experience is that bootstrapping Pass 1 takes significantly longer
> > than simply building in Pass 2 (Pass 2 includes c++ notwithstanding).
> >
> > I did not factor in the test suite as the SBU times don't reflect they
> > are being run.
> >
> >
> 
>  Huh ?  11 SBU for pass 1 ?   I admit that my timings include the
> testsuite for pass 2, but for 6.1 on i686 I've got
> 
> gcc-3.4.3 pass 1  596 seconds,  4.3 SBU
> gcc-3.4.3 pass 2 2075 seconds, 14.9 SBU
> 
> Ken
> -- 
>  das eine Mal als Tragödie, das andere Mal als Farce
> 
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-- 
Poison [BLX]
Joshua M. Murphy



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