MPICH2 also has beta support for thread_multiple.
Dave.
Juraj Tlsty wrote:
> I'm looking for MPI_THREAD_MULTIPLE level. I will test the LA_MPI. Thank
> for your help.
>
> On Mon, Mar 14, 2005 at 12:07:21PM -0500, Brian Barrett wrote:
>
>>On Mar 14, 2005, at 5:03 PM, Juraj Tlsty wrote:
>>
>>
>>>Hi folks,
>>>is there any thread-safe, non-commercial implementation of MPI for
>>>Linux?
>>>Thanks
>>
>>It depends on what you mean by "thread-safe" :). The MPI standard
>>gives four levels of thread safety:
>>
>> MPI_THREAD_SINGLE: Only one thread will execute.
>> MPI_THREAD_FUNNELED: The process may be multi-threaded, but only
>>the main thread
>> will make MPI calls (all MPI calls are ``funneled'' to the main
>>thread).
>> MPI_THREAD_SERIALIZED: The process may be multi-threaded, and
>>multiple threads
>> may make MPI calls, but only one at a time: MPI calls are not
>>made
>> concurrently from two distinct threads (all MPI calls are
>>``serialized'').
>> MPI_THREAD_MULTIPLE: Multiple threads may call MPI, with no
>>restrictions.
>>
>>LAM/MPI supports MPI_THREAD_SINGLE to MPI_THREAD_SERIALIZED since the
>>7.0 release. If you need MPI_THREAD_MULTIPLE support, I would
>>recommend looking at LA-MPI from Los Alamos National Laboratory:
>>
>> http://public.lanl.gov/lampi/
>>
>>The LAM/MPI team and LA-MPI team are collaborating on Open MPI, to be
>>released this year. It will also support MPI_THREAD_MULTIPLE, along
>>with oodles of other features not found in LA-MPI or LAM/MPI.
>>
>>Brian
>>
>>--
>> Brian Barrett
>> LAM/MPI developer and all around nice guy
>> Have an LAM/MPI day: http://www.lam-mpi.org/
>>
>>_______________________________________________
>>This list is archived at http://www.lam-mpi.org/MailArchives/lam/
>
>
--
Dr. David Cronk, Ph.D. phone: (865) 974-3735
Research Leader fax: (865) 974-8296
Innovative Computing Lab http://www.cs.utk.edu/~cronk
University of Tennessee, Knoxville
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