Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Ralph Castain
On Aug 16, 2009, at 8:16 PM, Eugene Loh wrote: Chris Samuel wrote: - "Eugene Loh" wrote: This is an important discussion. Indeed! My big fear is that people won't pick up the significance of the change and will complain about performance regressions in the middle of an OMPI stable re

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Eugene Loh
Chris Samuel wrote: - "Eugene Loh" wrote: This is an important discussion. Indeed! My big fear is that people won't pick up the significance of the change and will complain about performance regressions in the middle of an OMPI stable release cycle. 2) The pro

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Chris Samuel
- "Eugene Loh" wrote: > This is an important discussion. Indeed! My big fear is that people won't pick up the significance of the change and will complain about performance regressions in the middle of an OMPI stable release cycle. > Do note: > > 1) Bind-to-core is actually the default be

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread George Bosilca
I tend to agree with Chris. Changing the behavior of the 1.3 in the middle of the stable release cycle, will be very confusing for our users. Moreover, as Ralph pointed out, everything in Open MPI is configurable so if we advertise this feature in the Changelog, the institutions where the n

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Chris Samuel
- "Ralph Castain" wrote: > Hi Chris Hiya Ralph, > There would be a "-do-not-bind" option that will prevent us from > binding processes to anything which should cover that situation. Gotcha. > My point was only that we would be changing the out-of-the-box > behavior to the opposite of tod

[OMPI devel] Library dependencies

2009-08-16 Thread Graham, Richard L.
A question about library dependencies in the ompi build system. I am creating a new ompi component that has uses routines out of ompi/common/a and ompi/common/b . How do I get routines from ompi/common/a to pick up the symbols in ompi/common/b ? The symbol I am after is clearly in libmca_com

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Eugene Loh
This is an important discussion.  Do note: 1) Bind-to-core is actually the default behavior of many MPIs today. 2) The proposed OMPI bind-to-socket default is less severe.  In the general case, it would allow multiple jobs to bind in the same way without oversubscribing any core or socket.  (

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Ralph Castain
Hi Chris There would be a "-do-not-bind" option that will prevent us from binding processes to anything which should cover that situation. My point was only that we would be changing the out-of-the-box behavior to the opposite of today's, so all those such as yourself would now have to add the -d

Re: [OMPI devel] Heads up on new feature to 1.3.4

2009-08-16 Thread Chris Samuel
- "Terry Dontje" wrote: > I just wanted to give everyone a heads up if they do not get bugs > email. I just submitted a CMR to move over some new paffinity options > from the trunk to the v1.3 branch. Ralphs comments imply that for those sites that share nodes between jobs (such as oursel