<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr">so I can not base my article on the execution time calculation in my own machine because I did not have a parallel machine?<br></div><div class="gmail_extra"><br><div class="gmail_quote">2015-03-04 0:43 GMT+01:00 Junchao Zhang <span dir="ltr"><<a href="mailto:jczhang@mcs.anl.gov" target="_blank">jczhang@mcs.anl.gov</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Yes. I believe your i5 machine has least two cores. So it is indeed a parallel machine. You should observe some speedup when you run program with two MPI processes. </div><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr">--Junchao Zhang</div></div></div>
<br><div class="gmail_quote"><span class="">On Tue, Mar 3, 2015 at 5:44 AM, Chafik sanaa <span dir="ltr"><<a href="mailto:san.chafik@gmail.com" target="_blank">san.chafik@gmail.com</a>></span> wrote:<br></span><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class=""><div dir="ltr">I use the MPICH2 to parallelize my algorithm on an i5 machine, is the time calculated in this type of machinery is the time actually consumed or estimated in my programe? I ask this question because someone told me that if you do not work on a parallel machine then even if you calculate the execution time in your parallel algorithm and you compare it with the algorithm that you do not use parallelism is not correct.effectively I tried to compare the execution time of both programs but really I find that there's a accelerartion when I use the parallelism<br></div>
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