Re: [Gems-users] Why are ocean finish times coming in negative?


Date: Mon, 12 Apr 2010 09:05:32 -0500 (CDT)
From: Nilay Vaish <nilay@xxxxxxxxxxx>
Subject: Re: [Gems-users] Why are ocean finish times coming in negative?
I was running the Ocean simulation for only 50 time steps.

--
Nilay

On Mon, 12 Apr 2010, lopamudra chatterjee wrote:

Hi,

For all the parameters apart from the no of grid points and processor I am running with the default parameter.
So the
timestep=28800.0&nbsp;&nbsp;

Regards,
Lopamudra

On Mon, 12 Apr 2010 18:35:40 +0530  wrote
&gt;The amount of time taken for GEMS to execute the Ocean benchmark also
&gt;depends upon the number of time steps for which the Ocean simulation is
&gt;carried out.
&gt;
&gt;--
&gt;Nilay
&gt;
&gt;On Mon, 12 Apr 2010, lopamudra chatterjee wrote:
&gt;
&gt;&gt; Hi,
&gt;&gt;
&gt;&gt; I am running Ocean benchmark with 32 processors.
&gt;&gt; But the initialization finish time &amp; overall finish time comes in negative.
&gt;&gt; But the correct.out file of model output has positive values althigh it is run with 1 processor
&gt;&gt;
&gt;&gt; Is a negative value wrong?
&gt;&gt;
&gt;&gt; Another question
&gt;&gt; The run is&nbsp; taking a long time .
&gt;&gt; With 16 core ,4 L2 banks ,1 memory and 18X18 grid points it takes about 2 hours whereas I saw some one saying in the newsgroup that it runs for 18 minutes for them with 4 threads on
&gt;&gt;
&gt;&gt;
&gt;&gt;
&gt;&gt;
&gt;&gt;
&gt;&gt;
&gt;&gt; 258 X 258 grid of integers in a 16 core machine.
&gt;&gt; I am running on a 1.3 ghz intel core2 duo machine .
&gt;&gt; So anyone has any idea why this is taking so long?
&gt;&gt;
&gt;&gt; Thanks,
&gt;&gt; Lopamudra
&gt;&gt;
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