Dear Ramon:
> This is a _very nice_ machine; just out of curiosity,
what is the
> motherboard? (Iff I get some grant money, I'd like
purchasing one of
^^^^^^^ Sorry, I don't konw how to view the information
about
motherborad under linux.
> these, if they work smoothly with Linux).
>
>> I write a hostfile which contains two lines of
localhost and run
>> "lamboot -v hostfile", the output is :
>
> But how does your hostfile look like? I think something
like
>
> 127.0.0.1 cpu=16
>
> should be enough for you to have a lam universe over 8
CPUs.
I did this:
[basic]$ lamboot -v hostfile
LAM 7.1.1/MPI 2 C++/ROMIO - Indiana University
n-1<3871> ssi:boot:base:linear: booting n0 (127.0.0.1)
n-1<3871> ssi:boot:base:linear: finished
But it still seemed that lam was booted on only one cpu.
Becase when I ran "mpirun C cpi", the output is :
Process 0 of 1 on n0
pi is approximately 3.1415926544231341, Error is
0.0000000008333410
wall clock time = 0.000347
But when I ran "mpirun -np 4 cpi", the output is :
Process 2 of 4 on n0
Process 0 of 4 on n0
Process 1 of 4 on n0
Process 3 of 4 on n0
pi is approximately 3.1415926544231239, Error is
0.0000000008333307
wall clock time = 0.000196
What's wrong in the world?
_______________________________________________
This list is archived at http://www.l
am-mpi.org/MailArchives/lam/ |