[mpich2-dev] issues around MPID_Dev_comm_create_hook(), etc.

[David Gingold]

I'm scrambling to get a release out, but lest I forget about this  
later, I thought I should mention a few brief bits about  
MPID_Dev_comm_create_hook() and friends:

1.  The callers of these don't check the return values.  It would be  
nicer to allow the hooks to pass errors up, e.g. if the create hook  
does memory allocation.

2.  MPIR_Setup_intercomm_localcomm() doesn't call  
MPID_Dev_comm_create_hook().  Should it?  (This had me on a bit of a  
goose chase this evening, but I'm better now.)

3.  I've ended up hanging device-specific things off the communicator  
that might instead be hung off the communicator's group.  (The bits,  
in my case, are representations of what ranks are local versus off- 
node.)  Should we have MPID_Dev_group_{create,destroy}_hook()  
functions, also?  I note that there is already a MPID_DEV_GROUP_DECL  
facility.

-dg

--
David Gingold
Principal Software Engineer
SiCortex
Three Clock Tower Place, Suite 210
Maynard MA 01754
(978) 897-0214 x224



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