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From: "Suresh " <sureshn@aps.anl.gov>
Newsgroups: comp.soft-sys.matlab
Subject: Re: 64-bit : Vista vs Linux
Date: Tue, 22 Apr 2008 15:22:02 +0000 (UTC)
Organization: Argonne National Laboratory
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Hi Peter,

Thanks for the post.

The hardware details are:

Vista Hardware:
2 x Intel dual core Xeon 3.0 GHZ
8 GB 667 MHz RAM
Hard disk: SATA

Linux hardware:
1 x Intel Core Duo 2.33 GHz
8 GB 800 MHz RAM
Hard disk: SATA (similar specs)

I run the same Matlab code on both machines and I have the
multi-threading enabled in Matlab-preferences. 

On windows, I see 2 CPU's at 25% and the other two has no
load at all.
On Linux, 1 CPU is at 90% or so and the other is changing
between 50-90%.

Thanks.

Suresh



Peter Boettcher <boettcher@ll.mit.edu> wrote in message
<muyr6cy80qi.fsf@G99-Boettcher.llan.ll.mit.edu>...
> "Suresh " <sureshn@aps.anl.gov> writes:
> 
> > Hi,
> >
> > I wanted to get the experience of other people regarding the
> > performance of 64-bit OS's vista and Fedora Core.
> >
> > I have a quad-core hp workstation running 64-bit Vista (8 GB
> > RAM) and I have Linux Fedora Core 8 (64-bit) on a dual core
> > regular hp desktop with 8 GB RAM.
> >
> > I am running matlab analysis of very memory intensive and
> > also  involving lot of disk reading to perform calculations
> > on about 3000 images. I am using the exact same code on both
> > platforms.
> >
> > To my surprise, I get 2x better performance on the above
> > linux OS as compared to the above vista. The time I am
> > talking about is, 3100 sec (vista) vs 1700 sec (linux) for
> > the calculations.
> >
> > I would like to know about the experience of other people. I
> > am almost tempted to ditch vista and install 64-bit linux on
> >  the quad-core hardware.
> >
> > PS: I have enabled multiple threading in matlab for both
> > cases. So basically the conditions are exactly identical.
> 
> Please post the exact information on the processors in the
two machines.
> For such a large difference, I assume the processors are
different
> architectures.  For instance, an older dual-core Xeon will
be much
> slower than a newer Intel Core 2 Duo, even with identical
clock speeds.
> An AMD will be different yet.
> 
> You also mention disk reads.  You might be bottlenecked at
I/O, and
> there again, Linux might be somewhat more efficient on
identical
> hardware, but you haven't yet established that the disk
systems are
> identical, or even similar.
> 
> -Peter