Re: [Boost-build] Major engine changes

Subject: Re: [Boost-build] Major engine changes
From: Nogradi, Chris (Chris.Nogradi_at_[hidden])
Date: 2011-12-01 15:11:57

Yes, the time utility is part of cygwin on Windows and does not provide all the unix functionality.

Chris

-----Original Message-----
From: boost-build-bounces_at_[hidden] [mailto:boost-build-bounces_at_[hidden]] On Behalf Of Moritz Hassert
Sent: Thursday, December 01, 2011 1:30 PM
To: Boost.Build developer's and user's list
Subject: Re: [Boost-build] Major engine changes

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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