Bug#555714: mpich2: Please add support for blcr

[Pavan Balaji]

On 10/24/2010 11:42 AM, Lucas Nussbaum wrote:
> On 23/10/10 at 12:51 -0500, Pavan Balaji wrote:
>> On 10/23/2010 12:40 PM, Lucas Nussbaum wrote:
>>> On 11/11/09 at 10:15 -0600, Pavan Balaji wrote:
>>>> We had a short discussion on this within the MPICH group. We believe
>>>> that we will be able to modify the code such that enabling it at
>>>> configure time should not add any additional performance overhead
>>>> for applications that don't need this support. So starting
>>>> mpich2-1.3, you should be able to configure it in by default.
>>>
>>> Hi Pavan,
>>>
>>> What's the conclusion on this? Should I enable checkpointing by default?
>>> (Context: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555714)
>>
>> There will be some overhead in enabling this, but I think that
>> should be minimal. I'm checking with our developer who worked on
>> this. I'll get back to you.
>
> Apparently, if you enable it at build time, it then fails at runtime if
> blcr support is not present in the kernel. So I've left it disabled for
> now.

Yikes! That's a bug. We'll fix it.

  -- Pavan

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji