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[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

  • To: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
  • From: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@xxxxxxxxx>
  • Date: Sat, 31 Oct 2009 00:35:47 +0800
  • Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, space.time.universe@xxxxxxxxx, xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Fri, 30 Oct 2009 09:36:37 -0700
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I see. So you are referring to those extremely lean and heavily customized kernels tailor made specifically for your hardware. Redundant kernel modules for which hardware devices do not exist are not built. Then that would take a few minutes.

I did not use the -j argument to make. I will remember to use -j4 the next time I compile a kernel.

For me, I just take the default kernel configuration file for Fedora 11 linux 64-bit OS (default pvops domU, but no dom0 support), do a "make oldconfig", accept the defaults for whatever new kernel features there are, and then configure whatever XEN options are necessary.

So my pv-ops dom0 kernel is extremely distro-like.

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: http://teo-en-ming-aka-zhang-enming.blogspot.com
My Youtube videos: http://www.youtube.com/user/enmingteo
Email: space.time.universe@xxxxxxxxx
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Mobile Phone (SingTel): +65-9648-9798
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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 12:24 AM, Jeremy Fitzhardinge <jeremy@xxxxxxxx> 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).


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