On 11/29/2010 10:06 AM, Barrett, Brian W wrote:

I think we could do multi-element with the very loose element-wise guarantee. At one point, there was discussion about strengthening that guarantee, which would make the multi-element Get_accumulate painful.

The complain that was raised against multi-element Get_accumulate was that of reliability. If the network adapter does not have any buffering capability, the target buffer cannot be modified till the original data has been delivered to the origin. FWIW, the only requirement I had raised for multi-element Get_accumulate was for the NO_OP operation, where this is not an issue (in other words, element-wise atomic GET operation). -- Pavan -- Pavan Balaji http://www.mcs.anl.gov/~balaji