Re: Something is broken in repack

["Jon Smirl" <jonsmirl@gmail.com>]

On 12/11/07, Sean <seanlkml@sympatico.ca> wrote:
> On Tue, 11 Dec 2007 00:25:55 -0500
> "Jon Smirl" <jonsmirl@gmail.com> wrote:
>
> > Something is hurting bad with threads. 170 CPU minutes with one
> > thread, versus 195 CPU minutes with four threads.
> >
> > Is there a different memory allocator that can be used when
> > multithreaded on gcc? This whole problem may be coming from the memory
> > allocation function. git is hardly interacting at all on the thread
> > level so it's likely a problem in the C run-time.
>
> You might want to try Google's malloc, it's basically a drop in replacement
> with some optional built-in performance monitoring capabilities.  It is said
> to be much faster and better at threading than glibc's:
>
>   http://code.google.com/p/google-perftools/wiki/GooglePerformanceTools
>   http://google-perftools.googlecode.com/svn/trunk/doc/tcmalloc.html
>
>
> You can LD_PRELOAD it or link directly.

I'm 45 minutes into a run using it. It doesn't seem to be any faster
but it is reducing memory consumption significantly. The run should be
done in another 20 minutes or so.


>
> Cheers,
> Sean
>


-- 
Jon Smirl
jonsmirl@gmail.com