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From: Ricardo on 31 May 2010 00:20
Hi, I have been running a large code in matlab 7.5 (R2007b) on Windows XP SP3 32b on my laptop Intel Duo T9400 @2.53Ghz, 3.48Gb RAM. Only one core has been used (multi-core option has been disabled).
I recently ran the same code on a machine with 2 Xeon @2.4Ghz 64b Processors and 24Gb RAM, Linux Ubuntu and Matlab 2010, which by default uses multi-thread. 8 cores are beeing used during the run (CPU usage from TOP command shows about 750%).
What is really surprising is that the code runs slightly (maybe 10%) faster on the Windows machine, despite the fact it's using only one core.
Do anyone know why the Linux version is using so much resources and is still slower?

Thanks.
From: TideMan on 31 May 2010 00:26
On May 31, 4:20 pm, "Ricardo " <gustavo_ma...(a)hotmail.com> wrote:
> Hi, I have been running a large code in matlab 7.5 (R2007b) on Windows XP SP3 32b on my laptop Intel Duo T9400 @2.53Ghz, 3.48Gb RAM. Only one core has been used (multi-core option has been disabled).
> I recently ran the same code on a machine with 2 Xeon @2.4Ghz 64b Processors and 24Gb RAM, Linux Ubuntu and Matlab 2010, which by default uses multi-thread. 8 cores are beeing used during the run (CPU usage from TOP command shows about 750%).
> What is really surprising is that the code runs slightly (maybe 10%) faster on the Windows machine, despite the fact it's using only one core.
> Do anyone know why the Linux version is using so much resources and is still slower?
>
> Thanks.

There are more things in heaven and earth, Horatio,
Than are dreamt of in your philosophy.
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