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Subject: Re: [OMPI devel] New ARM patch
From: Paul Hargrove (phhargrove_at_[hidden])
Date: 2013-01-25 19:21:36


FYI:

I currently have QEMU-based ARM platform I use for testing other s/w:
   + a single-cpu ARMv5 system running Debian Squeeze
   + a dual-core ARMv7 system running Ubuntu Precise

Since these are EMULATED platforms, they are a bit on the slow side, making
periodic MTT runs untenable.
However, I am willing/able to run on-demand tests of release candidates if
Leif is not already performing such testing.

-Paul

On Fri, Jan 25, 2013 at 4:05 PM, Jeff Squyres (jsquyres) <jsquyres_at_[hidden]
> wrote:

> On Jan 25, 2013, at 7:28 AM, Leif Lindholm <Leif.Lindholm_at_[hidden]> wrote:
>
> >> Mmm. Ok. So is this a correct list of what is supported right now
> (i.e., in v1.6 with your patch)
> >> ARM4: no
> >> ARM5: no
> >> ARM6: sorta (not multi-core, or anywhere we would need barriers)
> >> ARM7: yes
> >
> > Correct, that is what is supported with out-of-line assembler functions
> > - i.e. when explicitly building with -DOMPI_DISABLE_INLINE_ASM.
> > They are all supported (and correctly using barriers) otherwise.
>
> Here's what I have done:
>
> 1. Committed your patch to v1.6. George's patch was not committed to v1.6.
>
> 2. I opened https://svn.open-mpi.org/trac/ompi/ticket/3481 to track your
> proposal of re-implementing/revamping the ARM ASM code.
>
> Do you have a timeline for when that can be done?
>
> 3. Since no one is currently MTT testing Open MPI on ARM, I added the
> following statement in the v1.6 README file under "Other systems have been
> lightly (but not fully tested):"
>
> - ARM4, ARM5, ARM6, ARM7 (when using non-inline assembly; only ARM7
> is fully supported when -DOMPI_DISABLE_INLINE_ASM is used).
>
> --> Is this correct?
>
> --> Do you think you'll be able to setup some MTT on ARM platforms?
>
> 4. I also added the following to v1.6 NEWS:
>
> - Automatically provide compiler flags that compile properly on some
> types of ARM systems.
>
> --
> Jeff Squyres
> jsquyres_at_[hidden]
> For corporate legal information go to:
> http://www.cisco.com/web/about/doing_business/legal/cri/
>
>
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>

-- 
Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900