[Xen-users] Re: [Xen-devel] Re: Using Xen Virtualization Environment for Development and Testing of Supercomputing and High Performance Computing (HPC) Cluster MPICH2 MPI-2 Applications

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Oct 31, 2009 at 12:39:10AM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
>    Fedora 12 released already? It's not November 2009 yet.
> 

Yeah, it's not yet released.. I'm running Fedora rawhide, which is the
development version of 12.

>    Why not use j8?
> 

I haven't really benchmarked which is the optimal value, but I thought 6
might be better than 4, and 8 might be already too much. 

-- Pasi

>    --
>    Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>    Engineering)
>    Alma Maters:
>    (1) Singapore Polytechnic
>    (2) National University of Singapore
>    My blog URL: [1]http://teo-en-ming-aka-zhang-enming.blogspot.com
>    My Youtube videos: [2]http://www.youtube.com/user/enmingteo
>    Email: [3]space.time.universe@xxxxxxxxx
>    MSN: [4]teoenming@xxxxxxxxxxx
>    Mobile Phone (SingTel): +65-9648-9798
>    Mobile Phone (Starhub Prepaid): +65-8369-2618
>    Age: 31 (as at 30 Oct 2009)
>    Height: 1.78 meters
>    Race: Chinese
>    Dialect: Hokkien
>    Street: Bedok Reservoir Road
>    Country: Singapore
> 
>    On Sat, Oct 31, 2009 at 12:29 AM, Pasi Kärkkäinen <[5]pasik@xxxxxx> wrote:
> 
>      On Fri, Oct 30, 2009 at 09:24:33AM -0700, Jeremy Fitzhardinge wrote:
>      > On 10/30/09 09:14, Mr. Teo En Ming (Zhang Enming) wrote:
>      > > Strange. I took nearly 1 hour to compile on my Intel Pentium Dual
>      Core
>      > > E6300 2.8 GHz processor on Intel Desktop Board DQ45CB with 8 GB
>      > > DDR2-800 memory.
>      >
>      > It depends a lot on how much kernel you have configured; I can believe
>      a
>      > full distro-like config with everything built with modules would take
>      a
>      > lot longer.  Are you using make's -j option to use multiple cores?  I
>      > tend to use "make -j4" to get good processor use on a dual-core system
>      > (rough rule of thumb, -jX where X = 2*ncpu).
>      >
> 
>      On a Core2 quad 2,66 GHz CPU Fedora 12 default-config full build
>      takes around 18 minutes.. with 8 GB of RAM and -j6.
>      -- Pasi
> 
> References
> 
>    Visible links
>    1. http://teo-en-ming-aka-zhang-enming.blogspot.com/
>    2. http://www.youtube.com/user/enmingteo
>    3. mailto:space.time.universe@xxxxxxxxx
>    4. mailto:teoenming@xxxxxxxxxxx
>    5. mailto:pasik@xxxxxx

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