[mvapich-discuss] Increasing the number of RMA windows

[Chaitra Kumar]

Hi Team,

We have two applications with similar requirement of increasing the number
of RMA windows.  For both applications we are getting same error.

Is there any upper limit on the number of RMA windows which can be created
by an MPI program?
Is there any other way to increase the number of RMA windows?

Any help in increasing the number of RMA windows is greatly appreciated.

Regards,
Chaitra



On Fri, Sep 4, 2015 at 12:11 PM, Chaitra Kumar <chaitragkumar at gmail.com>
wrote:

> Hi Team,
>
> We have a requirement to create more than 500 RMA windows.  We are using
> the variable: MV2_MAX_NUM_WIN to increase the number of RMA windows
> during MPI program launch.  But we are getting error even after setting the
> variable.
>
> Is there any upper limit on the number of RMA windows which can be created
> by an MPI program?
> Is there any other way to increase the number of RMA windows?
>
> The error we are getting is:
>
> [cli_383]: aborting job:
>
> Fatal error in MPI_Win_create:
>
> Other MPI error, error stack:
>
> MPI_Win_create(189)..................: MPI_Win_create(base=0x7f8095c3a010,
> size=1073741824, disp_unit=1, info=0x9c000000, comm=0xc4001344,
> win=0x2611a38) failed
>
> MPID_Win_create(95)..................:
>
> win_init(281)........................:
>
> MPIR_Comm_dup_impl(71)...............:
>
> MPIR_Comm_copy(1651).................:
>
> MPIR_Get_contextid(878)..............:
>
> MPIR_Get_contextid_sparse_group(1242):  Cannot allocate context ID because
> of fragmentation (279/2048 free on this process; ignore_id=0)
>
>
>
> [cli_434]: aborting job:
>
> Fatal error in MPI_Win_create:
>
> Other MPI error, error stack:
>
> MPI_Win_create(189)..................: MPI_Win_create(base=0x7fd6c9c87010,
> size=1073741824, disp_unit=1, info=0x9c000000, comm=0xc400111d,
> win=0x24caa38) failed
>
> MPID_Win_create(95)..................:
>
> win_init(281)........................:
>
> MPIR_Comm_dup_impl(71)...............:
>
> MPIR_Comm_copy(1651).................:
>
> MPIR_Get_contextid(878)..............:
>
> MPIR_Get_contextid_sparse_group(1242):  Cannot allocate context ID because
> of fragmentation (344/2048 free on this process; ignore_id=0)
>
>
> Thanks for your help.
>
>
>
> Regards,
>
> Chaitra
>
>
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