[mpich-discuss] mpich on Mac os x

[Reem Alraddadi]

Hi Pavan,

Could you explain more what do you mean by that? I am sorry I am still
beginner in MPICH.

Hi Wesley,
apologize about my first confused reply I have forgotten to change the
subject. However, as I mentioned I wrote the following line:

mpirun --np 4 --env MPIR_PARAM_CTXID_EAGER_SIZE 1 ./flash4

I am wondering if I made any mistake here as the problem is still the same

Thanks,
Reem



Message: 1
> Date: Mon, 08 Jul 2013 09:17:00 -0500
> From: Pavan Balaji <balaji at mcs.anl.gov>
> To: discuss at mpich.org
> Subject: Re: [mpich-discuss] mpich on Mac os x
> Message-ID: <51DAC9DC.5000502 at mcs.anl.gov>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
> Also make sure you are freeing unused communicators.
>
>   -- Pavan
>
> On 07/08/2013 08:14 AM, Wesley Bland wrote:
> > It seems that you're creating more communicators than MPICH can handle.
> It's possible that you might be able to get around this by setting the
> environment variable MPIR_PARAM_CTXID_EAGER_SIZE to something smaller than
> its default (which is 2). That frees up a few more communicators, but there
> is a pathological case where even with fewer communicators than the max,
> MPICH won't be able to agree on a new communicator id when needed. Try
> changing that environment variable and see if that fixes things.
> >
> > Wesley
> >
> > On Jul 8, 2013, at 5:33 AM, Reem Alraddadi <raba500 at york.ac.uk> wrote:
> >
> >> Hi all,
> >> I am using mpich-3.0.4 on Mac os x version 10.7.5 to run FLASH code. It
> works fine in the beginning of the run and then I got the following error:
> >>
> >> Fatal error in MPI_Comm_create: Other MPI error, error stack:
> >> MPI_Comm_create(600).................: MPI_Comm_create(comm=0x84000002,
> group=0xc8001349, new_comm=0x7fff606a8614) failed
> >> MPI_Comm_create(577).................:
> >> MPIR_Comm_create_intra(241)..........:
> >> MPIR_Get_contextid(799)..............:
> >> MPIR_Get_contextid_sparse_group(1146):  Cannot allocate context ID
> because of fragmentation (169/2048 free on this process; ignore_id=0)
> >> Fatal error in MPI_Comm_create: Other MPI error, error stack:
> >> MPI_Comm_create(600).................: MPI_Comm_create(comm=0x84000002,
> group=0xc80012b6, new_comm=0x7fff670cc614) failed
> >> MPI_Comm_create(577).................:
> >> MPIR_Comm_create_intra(241)..........:
> >> MPIR_Get_contextid(799)..............:
> >> MPIR_Get_contextid_sparse_group(1146):  Cannot allocate context ID
> because of fragmentation (316/2048 free on this process; ignore_id=0)
> >> Fatal error in MPI_Comm_create: Other MPI error, error stack:
> >> MPI_Comm_create(600).................: MPI_Comm_create(comm=0x84000004,
> group=0xc800000e, new_comm=0x7fff629d5614) failed
> >> MPI_Comm_create(577).................:
> >> MPIR_Comm_create_intra(241)..........:
> >> MPIR_Get_contextid(799)..............:
> >> MPIR_Get_contextid_sparse_group(1146):  Cannot allocate context ID
> because of fragmentation (2020/2048 free on this process; ignore_id=0)
> >> Fatal error in MPI_Comm_create: Other MPI error, error stack:
> >> MPI_Comm_create(600).................: MPI_Comm_create(comm=0x84000002,
> group=0xc8000020, new_comm=0x7fff639ae614) failed
> >> MPI_Comm_create(577).................:
> >> MPIR_Comm_create_intra(241)..........:
> >> MPIR_Get_contextid(799)..............:
> >> MPIR_Get_contextid_sparse_group(1146):  Cannot allocate context ID
> because of fragmentation (2002/2048 free on this process; ignore_id=0
> >>
> >> Is there a way to fix that ?
> >>
> >> Thanks,
> >> Reem
> >> _______________________________________________
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> >
> > _______________________________________________
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>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
>
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