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That is incorrect.<br><br>A Core I7 is about 40% faster with hyperthreading turned off.<br>A Core I7 is about 65% faster with hyperthreading turned on<br>and running 8 processes.<br><br>What you should NOT do (but which can happen very easily)<br>is running on a Core I7 with hyperthreading turned on and using<br>only 4 processes. In that case the processes are distributed<br>randomly over the 8 virtual and 4 real cores and the chance<br>is very high that at least one real cores gets 2 mdrun processes<br>and your simulation is nearly 50% slower than it could be.<br><br>If somebody has a solution for this problem under Linux,<br>that would be extremely useful.<br><br>Berk<br><br>> Date: Tue, 15 Sep 2009 14:20:09 +0200<br>> From: Antoine.Fortune@ujf-grenoble.fr<br>> To: gmx-users@gromacs.org<br>> Subject: Re: [gmx-users] Core i7 vs Core2Quad<br>> <br>> I7 about 20% faster at same clock speed ...<br>> Antoine<br>> <br>> <br>> <br>> marcos a écrit :<br>> > Hi,<br>> > <br>> > I wander if somebody has compared Core i7 vs Core2Quad in Gromacs<br>> > simulations.<br>> > Is Core i7 faster in a per clock basis?<br>> > <br>> > Marcos.<br>> > <br>> > <br>> > Marcos Villarreal<br>> > <br>> ><br>> > _______________________________________________<br>> > gmx-users mailing list gmx-users@gromacs.org<br>> > http://lists.gromacs.org/mailman/listinfo/gmx-users<br>> > Please search the archive at http://www.gromacs.org/search before posting!<br>> > Please don't post (un)subscribe requests to the list. Use the <br>> > www interface or send it to gmx-users-request@gromacs.org.<br>> > Can't post? Read http://www.gromacs.org/mailing_lists/users.php<br>> > <br><br /><hr />What can you do with the new Windows Live? <a href='http://www.microsoft.com/windows/windowslive/default.aspx' target='_new'>Find out</a></body>
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