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Subject: Re: [OMPI devel] New ARM patch
From: Leif Lindholm (leif.lindholm_at_[hidden])
Date: 2013-01-25 07:28:01


On 24/01/13 22:12, Jeff Squyres (jsquyres) wrote:
> On Jan 24, 2013, at 8:18 AM, Leif Lindholm <Leif.Lindholm_at_[hidden]> wrote:
>>> I tested this patch in v1.6 and v1.7 on my Pi, and it seems to work
>>> just fine. "make check" passes all the ASM tests.
>>
>> Just to be perfectly clear: it wouldn't on ARMv5 though, and the ARMv6
>> ASM test executed with NOPs for barriers, although it would correctly
>> pass all other tests.
>
> 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.

> How would George's patch have changed that list?

ARM4: no
ARM5: maybe, unvalidated
ARM6: yes
ARM7: yes

/
     Leif

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