[mvapich-discuss] CMA feature not recognized.

[Jonathan Perkins]

Hello, is PTRACE allowed by ordinary users on your system?  Try running the
following:
cat /proc/sys/kernel/yama/ptrace_scope

If that returns 1 then I think it is a security restriction on your system.

If that is the case then you can follow one o the workarounds mentioned in
the following url:
http://askubuntu.com/questions/146160/what-is-the-ptrace-scope-workaround-for-wine-programs-and-are-there-any-risks

Please let me know if this helps.

On Fri, Jun 19, 2015 at 6:09 AM Chaitra Kumar <chaitragkumar at gmail.com>
wrote:

> Hi Team,
>
> I am trying to run an MPI application.  At runtime, the application fails
> with below error:
>
> [test-1:mpi_rank_0][MPIDI_CH3I_SMP_init] CMA is not available. Set
> MV2_SMP_USE_CMA=0 to disable CMA.
>
> [cli_0]: aborting job:
>
> Fatal error in MPI_Init:
>
> Other MPI error, error stack:
>
> MPIR_Init_thread(514)....:
>
> MPID_Init(359)...........: channel initialization failed
>
> MPIDI_CH3_Init(446)......:
>
> MPIDI_CH3I_SMP_Init(2182): process_vm_readv: Operation not permitted
>
> System details:
> OS: Ubuntu 14.04.2 LTS
> Linux kernel: Linux 3.13.0-53-generic
> MVAPICH2: MVAPICH2 2.1
>
>
> I confirmed that CMA is supported on the system. But MVAPICH2 throws the
> error: CMA Not available.
>
> What could be cause of this error? How can I resolve this?
>
> Please let me know if you need further information.
>
> Regards,
> Chaitra
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