As far as I know, since your struct contains a pointer, I don't believe you have a choice other than to pack. Someone can correct me if I'm wrong. Thanks, Raghu From: [email protected] [mailto:[email protected]] On Behalf Of Mahesh Doijade Sent: Thursday, March 21, 2013 4:42 AM To: [email protected] Subject: Re: [mpich-discuss] Query regarding structure of dynamic array derived datatype Hi, Thanks for your reply, after looking at various MPI derived datatype creation functions other than MPI_Pack according to me option can probably be of using MPI_Type_create_struct but then for each structure element I have to create a separate derived datatype as the block lengths will be different due to dynamic array present in them, so again the extra memory will be required now for type-maps of these datatypes. Is the approach of MPI_Type_create_struct mentioned above will be better than MPI_Pack in this case? also is there any other optimal way to do this? -- Regards, -- Mahesh Doijade On Thu, Mar 21, 2013 at 2:36 AM, Pavan Balaji <[email protected]> wrote: Please look through the derived datatype constructs in MPI. Google can help you find some tutorials. -- Pavan On 03/19/2013 06:12 AM US Central Time, Mahesh Doijade wrote:
Hi, I have a struct as - struct A { int size; int *lptr; }; And then I have array of such structure, I want to only send dynamic array present in each of the structs to other process. One of the options is to do it with MPI_Pack but then I have read it is not so good from performance point of view. What can be the other opt
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Regards, -- Mahesh Doijade
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-- Pavan Balaji http://www.mcs.anl.gov/~balaji <http://www.mcs.anl.gov/%7Ebalaji>