[mvapich-discuss] Error Creating Memory Windows

[Gopal Santhanaraman]

 Hi Thomas

    Thanks for reporting the problem. There is a compile time
 variable for maximum number of concurrent windows. Currently it is
 set to 16. You can change it to a higher value according to the
 number of windows your program needs and recompile the mpi library.

 variable name - MAX_WIN_NUM
 src/mpid/osu_ch3/channels/mrail/src/gen2/ibv_param.h (line no: 122)

 Please let us know how it goes.

Thanks
Gopal

On Thu, 26 Jul 2007, OShea, Thomas T. wrote:

> I'm getting an error when trying to create multiple MPI windows. If I
> comment out a few of the earlier windows the error will move down to a
> later window, so I seems like I'm hitting some sort of maximum memory
> windows, or maximum memory allocated. I've increased and reduced the
> actual array sizes, so it doesn't seem to be a memory size issue.
>
>
>
> Is there a variable somewhere that controls maximum windows?
>
>
>
> Here's the error I get:
>
>
>
> win_test: rdma_iba_1sc.c:440: MPIDI_CH3I_RDMA_win_create: Assertion
> 'MPIDI_CH3I_RDMA_Process.current_win_num <= (16)' failed.
>
>
>
> I've attached a test code that should mimic this error. Strangely, It
> runs fine using the latest version of MPICH2.
>
>
>
> I'm using Cray Pointers here to help allocate the memory with
> MPI_ALLOC_MEM for my windows. I'm not sure if this will create problems
> since I'm on a 64-bit system.
>
>
>
> I'm currently running mvapich2 0.9.8p3 with Open Fabrics.
>
>
>
> Thanks,
>
> Tom O'Shea
>
>