Hmmm...interesting. I see what's going on - I'm having a build system
issue that is causing some of the dynamic libraries to not be seen.
Red herring - thanks for clarifying!
Camille: thanks for fixing this way back when.
Ralph
On Oct 22, 2008, at 1:17 PM, George Bosilca wrote:
Ralph,
This problem was fixed long ago by some of the work Camille did. The
exact revision number is r15402 (https://svn.open-mpi.org/trac/ompi/changeset/15402
). I'm using this feature daily and so far I had any problems with it.
To reuse your example here is what Camille came up with.
$ mpiexec --mca routed_base_verbose 30 -n 3 hostname
[dancer:09638] mca: base: components_open: Looking for routed
components
[dancer:09638] mca: base: components_open: opening routed components
[dancer:09638] mca: base: components_open: found loaded component
binomial
[dancer:09638] mca: base: components_open: component binomial has no
register function
[dancer:09638] mca: base: components_open: component binomial has no
open function
[dancer:09638] mca: base: components_open: found loaded component
direct
[dancer:09638] mca: base: components_open: component direct has no
register function
[dancer:09638] mca: base: components_open: component direct has no
open function
[dancer:09638] mca: base: components_open: found loaded component
linear
[dancer:09638] mca: base: components_open: component linear has no
register function
[dancer:09638] mca: base: components_open: component linear has no
open function
[dancer:09638] mca:base:select: Auto-selecting routed components
[...]
And if we force a special component:
$ mpiexec --mca routed linear --mca routed_base_verbose 30 -n 3
hostname
[dancer:09642] mca: base: components_open: Looking for routed
components
[dancer:09642] mca: base: components_open: opening routed components
[dancer:09642] mca: base: components_open: found loaded component
linear
[dancer:09642] mca: base: components_open: component linear has no
register function
[dancer:09642] mca: base: components_open: component linear has no
open function
[dancer:09642] mca:base:select: Auto-selecting routed components
[...]
I wonder what are the configuration options you're using?
george.
On Oct 22, 2008, at 1:30 PM, Ralph Castain wrote:
I've been digging a little into optimization and found something
that seems counterintuitive in the way OMPI is handling components.
Specifically, if I specify a component I want used for a framework,
OMPI still does a component load and open on every component in the
framework - it only uses my specification during "select".
Thus, the cmd line
mpirun -mca routed linear
still results in the loading and opening of the direct and binomial
components - even though we have directed the framework not to use
them.
This causes us to waste memory when there is no possibility of a
different component being selected. Is there a reason why "open"
isn't using the mca params to guide the components it is loading?
Ralph
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