On 10/26/06, <b class="gmail_sendername">Yixun Liu</b> <<a href="mailto:yxliu@fudan.edu.cn">yxliu@fudan.edu.cn</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<div><font face="Bookman Old Style">Hi,</font></div>
<div><font face="Bookman Old Style">I want to know how many processes is better.
My computer is dual processors PC with superthread. According to the exampe ex2
I set the problem domain to 800*200. I set the number of processes to 1,2,4,10
respecively and the runtime is 26, 19, 18, 15 respectively. How many processes
is better. In my opinion 4(2processors * 2superthreads) is better based on my
computer, but why 10 ran more quickly?</font></div></div></blockquote><div><br>Again, this question is about gneric theory of parallel processing, and really has not answer<br>as you pose it. I suggest the book "Parallel Computing" by Grama, et. al.
<br><br> Matt<br></div><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div bgcolor="#ffffff"><div><font face="Bookman Old Style">Best,
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<div><font face="Bookman Old Style">Yixun</font></div></div>
</blockquote></div><br><br clear="all"><br>-- <br>"Failure has a thousand explanations. Success doesn't need one" -- Sir Alec Guiness