You will have to use the MPI_Type_create_struct
(http://www.open-mpi.org/doc/v1.5/man3/MPI_Type_create_struct.3.php).
george.
On Dec 8, 2010, at 16:04 , Santosh Ansumali wrote:
> Dear all,
> I am confused with the use of MPI derived datatype for classes with
> static member. How to create d
Hi,
I know that you don't try to port Open Mpi to Cygwin at the moment but
perhaps you can give me a hint how to proceed. I tried to build
openmpi-1.5.1rc1 on Cygwin 1.5.25 with gcc-4 with the following options.
../openmpi-1.5.1rc1r24104/configure --prefix=/usr/local/openmpi-1.5.1-gcc-4
CC=gcc-4
On Thu, Dec 9, 2010 at 8:53 PM, George Bosilca wrote:
> You will have to use the MPI_Type_create_struct
> (http://www.open-mpi.org/doc/v1.5/man3/MPI_Type_create_struct.3.php).
My doubt is what it means to compute blocklength and displacement for
static variable. For example, if I have a class
I would imagine block length be sizeof(int) + sizeof(double), with
displacement [0, sizeof(int)+1] ?
On Thu, Dec 9, 2010 at 7:46 AM, Santosh Ansumali wrote:
> On Thu, Dec 9, 2010 at 8:53 PM, George Bosilca
> wrote:
> > You will have to use the MPI_Type_create_struct (
> http://www.open-mpi.org/
Btw why do you want to send he size around if it is a constant?
george.
On Dec 9, 2010, at 12:30 , David Zhang wrote:
> I would imagine block length be sizeof(int) + sizeof(double), with
> displacement [0, sizeof(int)+1] ?
>
> On Thu, Dec 9, 2010 at 7:46 AM, Santosh Ansumali wrote:
> On Thu
> -Original Message-
> From: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On
> Behalf Of Eugene Loh
> Sent: 08 December 2010 16:19
> To: Open MPI Users
> Subject: Re: [OMPI users] curious behavior during wait for broadcast:
> 100% cpu
>
> I wouldn't mind some clarificatio
Sorry for delay - am occupied with my day job.
Yes, that is correct to an extent. When you yield the processor, all that
happens is that you surrender the rest of your scheduled time slice back to the
OS. The OS then cycles thru its scheduler and sequentially assigns the
processor to the line o
On Wed, Dec 8, 2010 at 10:04 PM, Santosh Ansumali wrote:
> I am confused with the use of MPI derived datatype for classes with
> static member. How to create derived datatype for something like
> class test{
> static const int i=5;
> double data[5];
> }
>
This looks like C++ code, and I think t
Is it possible through MPI for a worker to determine:
1. how many MPI processes are running on the local machine
2. within that set its own "local rank"
?
For instance, a quad core with 4 processes might be hosting ranks 10,
14, 15, 20, in which case the "local ranks" would be 1,2,3,4. Th
The answer is yes - sort of...
In OpenMPI, every process has information about not only its own local rank,
but the local rank of all its peers regardless of what node they are on. We use
that info internally for a variety of things.
Now the "sort of". That info isn't exposed via an MPI API at
Thanks every one.
> - the "static" data member is shared between all instances of the
> class, so it cannot be part of the MPI datatype (it will likely be
> at a fixed memory location);
Yes! I agree that i is global as far as different instances of class
is concern. I don't even want it to be
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