Dear List,
I have a hybrid MPI/Pthreads program named "my_hybrid_app", this program is
memory-intensive and take advantage of multi-threading to improve memory
throughput. I run "my_hybrid_app" on two machines, which have same hardware
configuration but different OS and GCC. The problem is: when I
Does the difference persist if you run the single process using mpirun? In
other words, does "mpirun -np 1 ./my_hybrid_app..." behave the same as "mpirun
-np 2 ./..."?
There is a slight difference in the way procs start when run as singletons. It
shouldn't make a difference here, but worth test
-
Huiwei Lv
On Tue, Oct 25, 2011 at 12:00 AM, wrote:
>
> Date: Mon, 24 Oct 2011 07:14:21 -0600
> From: Ralph Castain
> Subject: Re: [OMPI users] Hybrid MPI/Pthreads program behaves
> differently on two different machines with same hardware
> To: Open MPI Users
> Message
>
> Date: Mon, 24 Oct 2011 07:14:21 -0600
> From: Ralph Castain
> Subject: Re: [OMPI users] Hybrid MPI/Pthreads program behaves
>differently on two different machines with same hardware
> To: Open MPI Users
> Message-ID: <42c53d0b-1586-4001-b9d2-d77af0033...@o
e number of threads, but run "mpirun -np 2 ./..." decrease the
> performance.
>
> --
> Huiwei Lv
>
> On Tue, Oct 25, 2011 at 12:00 AM, wrote:
>
>>
>> Date: Mon, 24 Oct 2011 07:14:21 -0600
>> From: Ralph Castain
>> Subject: Re: [OMPI users] Hybr
2 ./..." decrease the
>> performance.
>>
>> --
>> Huiwei Lv
>>
>> On Tue, Oct 25, 2011 at 12:00 AM, wrote:
>>
>> Date: Mon, 24 Oct 2011 07:14:21 -0600
>> From: Ralph Castain
>> Subject: Re: [OMPI users] Hybrid MPI/Pthreads p
quot;
>> and "mpirun -np 2 ./...".
>>
>> Run "mpirun -np 1 ./my_hybrid_app..." will increase the performance with
>> more number of threads, but run "mpirun -np 2 ./..." decrease the
>> performance.
>>
>> --
>> Huiwei Lv
&g
