[gmx-users] dual xeon p4
spoel at xray.bmc.uu.se
Fri Jul 11 08:53:01 CEST 2003
On Fri, 2003-07-11 at 08:40, Y U Sasidhar wrote:
> David wrote:
> >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.
> That was my observation also.
> How do I turnoff hyperthreading support on installed Linux ? I want to try and see if I can overcome mpirun problem too.
You have to do it in the bios, it may be that newer kernel "know" about
hyperthreading but IIRC they also turned it off in one of the local
large clusters here in Sweden.
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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
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