On Mar 21, 2007, at 10:24 AM, Donald Kerr wrote:
Case: A btl parameter is given a default setting and at some later point is potentially adjusted depending on the number of peers. Now if the MPI user sets this same parameter I don't won't to overright what they have set, or at least I would like to warn them before doing so.
Gotcha. Right now, there's no way to check this (i.e., what "level" an MCA param was set from). I see two options for going forward:
1. Add an API call to check what level a given MCA param is currently resolved from (probably return some kind of enum?).
2. Don't use the MCA param API but rather keep your own state (e.g., a global with the default, another with the adjusted value derived from the number of peers, etc.) and do your own comparisons to see if the value was changed.
#2 is workable today, but obviously more work for you. #1 is a better long-term solution. It wouldn't be too much work to do, but I unfortunately do not have the cycles to do it at the moment. I'd be happy to point you in the right direction, if you want...
-- Jeff Squyres Cisco Systems
