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Subject: Re: [OMPI devel] [devel-core] OMPI MCA components - track external libs versions
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-04-14 15:13:03


On Apr 14, 2014, at 2:57 PM, Mike Dubman <miked_at_[hidden]> wrote:

> I think (+know) that many production environments and OMPI users will be happy to have it.

Agreed. Something like:

    char version_str[128];

    snprintf(version_str, sizeof(version_str),
             "%d.%d.%d", libusnic_major, libusnic_minor, libusnic_release);
    mca_base_component_var_register(&mca_btl_usnic_component.super.btl_version,
                                    "libusnic_version",
                                    "Version of the libusnic library",
                                    MCA_BASE_VAR_TYPE_STRING,
                                    NULL, 0, 0,
                                    OPAL_INFO_LVL_3,
                                    MCA_BASE_VAR_SCOPE_READONLY,
                                    version_str);

Then:

  shell$ ompi_info --param btl usnic --level 9 --parsable | grep version | grep :value:
  mca:btl:usnic:param:btl_usnic_libusnic_version:value:1.2.3

Make sense?

I suggest level 2 or level 3 for such vars. They shouldn't be in default level 1 ompi_info output, but it is information that may be required to run correctly, so it should be in the "end user" set of info (i.e., be <= 3). See https://svn.open-mpi.org/trac/ompi/wiki/MCAParamLevels.

My point: I don't think you need any new infrastructure for this -- you can do it today.

-- 
Jeff Squyres
jsquyres_at_[hidden]
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