[mpich-discuss] Internal memory allocation error?

[Rajeev Thakur]

Can you send us a small program that we can run to reproduce the error?

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: Monday, October 20, 2008 12:22 PM
> To: mpich-discuss at mcs.anl.gov
> Subject: Re: [mpich-discuss] Internal memory allocation error?
> 
> Hi Rajeev-
> 
> Yes, the sends and receives are in lock-step.  The code 
> finishes a pixel, then the master sends out the next 
> available pixel to the slave that just returned a result, but 
> during the slave's MPI_Recv to receive that next available 
> pixel is where the original error comes up.  I know, I 
> couldn't imagine how it would fail either, but lo and behold 
> my imagination isn't as good as the MPI error conditions  :)
> 
> Hi Peter-
> 
> I'm just running my code on a single workstation with a 
> dual-core processor.  The messages where the code fails are 
> just 2-element integer arrays, so my messages aren't large by 
> any standards, and I'd been thinking too about the large 
> number of sends/receives being the problem.  I too have tried 
> decreasing the message size while increasing the number of 
> sends/receives, but still to no avail.
> 
> 
> --
> Cheers,
> Brian
> brian.harker at gmail.com
> 
> 
> "In science, there is only physics; all the rest is stamp-collecting."
> 
> -Ernest Rutherford
> 
>