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Subject: Re: [Boost-build] Major engine changes
From: Moritz Hassert (mhassert_at_[hidden])
Date: 2011-12-01 14:30:27


Hi Chris,

Am Donnerstag, 1. Dezember 2011, 12:26:38 schrieb Nogradi, Chris:
> Is that on a Linux or Windows host?

It's an Ubuntu 11.10 host. b2 was compiled with gcc 4.6.
The project is a collection of libraries and executables with a lot of dependencies among them. Including lots of boost headers, boost spirit among them.
All files reside on local storage and seem to fit completely into disk cache.
There's only a few generated sources (~20). Perhaps that's the major difference to the situation you described in your last mail?

By the way:
Your "time" results look strange from a linux point of view :
There's practicly no "user" time at all. Wouldn't that suggest that the execution time was *completely* io-bound? Or is the meaning of the results different on Windows?

>
>
> -----Original Message-----
> From: boost-build-bounces_at_[hidden] [mailto:boost-build-bounces_at_[hidden]] On Behalf Of Moritz Hassert
> Sent: Thursday, December 01, 2011 12:05 PM
> To: Boost.Build developer's and user's list
> Subject: Re: [Boost-build] Major engine changes
>
> Great job Steve!
>
> Am Dienstag, 29. November 2011, 16:02:06 schrieb Steven Watanabe:
> > I've just committed a major rewrite of the
> > jam interpreter. So, far, I'm seeing a 2x speed
> > up running bjam -n -d0 in $BOOST_ROOT/status.
>
> I gave the new b2 from current trunk a try with a rather huge project of ours.
> The numbers are even more impressive: I get a speed up of 3.7x!
> (I repeated boths commands a few times to load everything into caches and eliminate io-waits.)
>
> *** OLD ***
> $ time b2 libs tools toolset=gcc-4.5 address-model=32 address-model=64
> ...patience...
> ...patience...
> ...patience...
> ...patience...
> ...found 58715 targets...
>
> real 0m38.264s
> user 0m37.874s
> sys 0m0.328s
>
>
> *** NEW ***
> $ time /tmp/b2test/bin/b2 libs tools toolset=gcc-4.5 address-model=32 address-model=64
> ...patience...
> ...patience...
> ...patience...
> ...patience...
> ...found 58715 targets...
>
> real 0m10.654s
> user 0m10.261s
> sys 0m0.332s
>
>
> Thanks and keep up the good work!
>
> Moritz
>
> Geschaeftsfuehrer: Dipl.-Inform. Christopher Asp
> Amtsgericht Mannheim HRB 105845
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Geschaeftsfuehrer: Dipl.-Inform. Christopher Asp
Amtsgericht Mannheim HRB 105845


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