I can do the coding - just want to ensure interested others get their
$0.002 in on how it should work.
I came up with a way to do it that doesn't require changes to the
paffinity framework. I can complete the prototype next week on an hg
branch and let you look at it. Mostly consists of moving what is now
in MPI_Init into the odls modules between the fork and exec, as Brian
suggested.
On May 7, 2009, at 12:43 PM, Terry Dontje wrote:
Brian W. Barrett wrote:
On Wed, 6 May 2009, Ralph Castain wrote:
Any thoughts on this? Should we change it?
Yes, we should change this (IMHO) :).
Me too.
If so, who wants to be involved in the re-design? I'm pretty sure
it would require some modification of the paffinity framework,
plus some minor mods to the odls framework and (since you cannot
bind a process other than yourself) addition of a new small
"proxy" script that would bind-then-exec each process started by
the orted (Eugene posted a candidate on the user list, though we
will have to deal with some system-specific issues in it).
I can't contribute a whole lot of time, but I'd be happy to lurk,
offer advice, and write some small bits of code. But I definitely
can't lead.
Fist offering of opinion from me. I think we can avoid the "proxy"
script by doing the binding after the fork but before the exec.
This will definitely require minor changes to the odls and probably
a bunch of changes to the paffinity framework. This will make
things slightly less fragile than a script would, and yet get us
what we want.
I'll have to talk with Len to see if Sun has any time to allocate to
this.
--td
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