[gmx-users] dual xeon p4

[David]

On Fri, 2003-07-11 at 08:22, Y U Sasidhar wrote:
> David wrote:
> 
> >2.2 GHz, Supermicro motherboard, 2Gb DDR, Hyperthreading turned off.
> >  
> >
> I  have dual xeons 1.8 MHz and 2.4 MHz
> Currently Linux sees 4 cpus due to hyper threading.
> What is the reason for turning off hyper threading ?
Has to do with OS. I had some case where Linux would schedule a two
processor job on the two threads of a single processor while the other
processor was idle. 

> A few days ago I reported a mpirun problem. Is there any connection ?
Don't know. If you have performance problems check that you have
compiled LAM with support for usysv shared memory communication.

> Sasidhar
> 
> _______________________________________________
> gmx-users mailing list
> gmx-users at gromacs.org
> http://www.gromacs.org/mailman/listinfo/gmx-users
> Please don't post (un)subscribe requests to the list. Use the 
> www interface or send it to gmx-users-request at gromacs.org.
-- 
Groeten, David.
________________________________________________________________________
Dr. David van der Spoel, 	Dept. of Cell and Molecular Biology
Husargatan 3, Box 596,  	75124 Uppsala, Sweden
phone:	46 18 471 4205		fax: 46 18 511 755
spoel at xray.bmc.uu.se	spoel at gromacs.org   http://xray.bmc.uu.se/~spoel
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++