[mpich-discuss] Internal memory allocation error?

[Rajeev Thakur]

This can happen if the sender does too many sends and the receiver doesn't
post receives fast enough. Try using MPI_Irecv and posting enough of them to
match the incoming sends.

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Brian Harker
> Sent: Friday, October 17, 2008 4:19 PM
> To: mpich-discuss at mcs.anl.gov
> Subject: [mpich-discuss] Internal memory allocation error?
> 
> Hello list-
> 
> I have a fortran 90 program that loops over pixels in an 
> image in parallel.  There are 211K total pixels in the 
> field-of-view, and the code always crashes around the 160K^th 
> pixel, give or take a hundred or so, with the following message:
> 
> Fatal error in MPI_Recv: Other MPI error, error stack:
> MPI_Recv(186).............................: 
> MPI_Recv(buf=0x82210d0, count=2, MPI_INTEGER, src=0, 
> tag=MPI_ANY_TAG, MPI_COMM_WORLD,
> status=0x82210e0) failed
> MPIDI_CH3i_Progress_wait(214).............: an error occurred 
> while handling an event returned by MPIDU_Sock_Wait()
> MPIDI_CH3I_Progress_handle_sock_event(436):
> MPIDI_EagerContigIsend(567)...............: failure occurred 
> while allocating memory for a request object[cli_2]: aborting job:
> 
> Now, I have no dynamically allocatable variables in the code, 
> so the error means there is not enough memory in the buffer 
> for all the communication at this step?  I have increased 
> MP_BUFFER_MEM from the default 64M to 128M with no change in 
> the error.  Is it possible that I'm just trying to do too 
> much at once with my dual-core processor?  I wouldn't think 
> so, I'm only running the code with 6 processes...and I don't 
> believe this is a data problem.
> 
> Any ideas would be appreciated, and I can post any other 
> information anyone wants.  Thanks!
> 
> 
> 
> --
> Cheers,
> Brian
> brian.harker at gmail.com
> 
> 
> "In science, there is only physics; all the rest is stamp-collecting."
> 
> -Ernest Rutherford
> 
>