Bug#660259: mpich2: FTBFS: [sparc] missing files

[Pavan Balaji]

On 05/07/2012 08:50 AM, Samuel Thibault wrote:
>> This might be a bug in OPA.  Can you send us the log of the OPA configure?
>> Also, a log of the mpich2 configure will be useful.  If you are using
>> --with-device=ch3:sock, it doesn't use OPA, so it won't matter.
>
> It's all on
>
> https://buildd.debian.org/status/fetch.php?pkg=mpich2&arch=sparc&ver=1.4.1-4&stamp=1328215853

It does look like emulated locks are being used.  Here's the interesting 
part of the OPA configure:

configure: WARNING:
===================================================
Using locks to implement atomic primitives.  This
will result in a substantial impact on performance.
Use this only for testing.
===================================================

Note that, as the warning suggests, on platforms that do not have native 
atomics, the performance might not be very good.  It might be better to 
use --with-device=ch3:sock which doesn't use shared memory at all.

  -- Pavan

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