[Pkg-openmpi-maintainers] Release 1.2.3-4

Dirk Eddelbuettel edd at debian.org
Tue Aug 21 19:18:59 UTC 2007


Manuel,

Thanks *again* for doing all the legwork here. Much appreciated.

On 21 August 2007 at 13:59, Manuel Prinz wrote:
| Am Montag, den 20.08.2007, 20:46 -0500 schrieb Dirk Eddelbuettel:
| > We are now down to three open bugs, all on the 'lack of atomistic ops' for
| > m68k, s390 and hppa as the kfreebsd* variants should build and run.
| > 
| > Concerning the 'lack of atomistic ops', we had started a thread on the
| > openmpi-devel list. I recall that some folks had volunteered to try to get
| > some of this going where possible.  Would anybody have a moment to collect
| > that information and follow-up here, and/or on openmpi-devel?
| 
| A little bit of history:
| 
| According to Brain Barret's mail [1] there has to be some implementation
| work of atomic wordsize compare and swap and of the memory barrier
| functions.
| 
| George Bosilca [2] proposed disabling threading features on platforms
| that lack atomic support. Brain agreed to that and stated that compare
| and swap is used in the LIFO used for free list. Gleb Natapov added that
| proper memory barrier is needed "for openib BTL eager RDMA support".
| 
| In [3] Brain states that it's possible to determine if support atomic
| operations is available or not. He also says that there's code for Alpha
| and MIPS, and Jens Seidel offered help on testing on MIPS and MISPEL
| [4]. Craig Prescott offered help for Alpha [5].
| 
| For HPPA, there some issues where discussed. Thiemo Seufer proposed the
| use of libatomicops [6], Grant Grundler proposed to talk to HP's MPI
| team.

So I guess we need to get back to 
	Jens Seidel for MIPS
	Craig for Alpha
	Thiemo/Grant for Hppa

Do you want to follow-up, maybe with CCs here? 

| This is where threads end. I can't see if this lead to some code in the
| end.
| 
| > Many thanks, Dirk
| 
| You're welcome! I wasn't sure about what would be the next step, so I'm
| not taking it to openmpi-devel.

Yes, I guess we can leave them alone until we get stuck.  

Cheers, Dirk

| 
| Best regards,
| Manuel
| 
| Footnotes:
|  1. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000102.html
|  2. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000104.html
|  3. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000112.html
|  4. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000106.html
|  5. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000120.html
|  6. http://lists.alioth.debian.org/pipermail/pkg-openmpi-maintainers/2007-July/000122.html
| 
| 
| 
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