<moving this to devel, as it really belongs there>
Scott Atchley wrote:
On Jul 10, 2007, at 3:24 PM, Tim Prins wrote:
On Tuesday 10 July 2007 03:11:45 pm Scott Atchley wrote:
On Jul 10, 2007, at 2:58 PM, Scott Atchley wrote:
Tim, starting with the recently released 1.2.1, it is the default.
To clarify, MX_RCACHE=1 is the default.
It would be good for the default to be something where there is no
warning
printed (i.e. 0 or 2). I see the warning on the current trunk.
Tim
After further discussion in-house, the warning can be avoided if -
lmyriexpress is included when linking the app (i.e. if it is in mpicc
when linking).
We cannot do this since we create network agnostic executables so that
users can select networks at runtime. Doing -lmyriexpress would put an
artificial dependency on the myrinet library, even if the user does not
want to use it.
Another clarification, the regache does work with several replacement
malloc libraries. If the user application overloads mmap(), munmap()
and sbrk(), then it may or may not work. In this case, the user
should use MX_RCACHE=0.
This sounds to me like a lot to ask the user to do...
My opinion is that if MX_RCACHE is not explicitly set by the user, Open
MPI should set it to either 0 or 2 automatically. An explicit goal Open
MPI is for it to automatically do the right thing in most cases. Letting
a ton of warnings be spit out at the user, in my opinion, is the wrong
thing.
Tim
