[mpich-discuss] Faster MPI_Attr_get?

[Dave Goodell]

On May 11, 2012, at 1:49 PM CDT, Dave Goodell wrote:

> On May 11, 2012, at 1:17 PM CDT, Jed Brown wrote:
> 
>> Can you make this fast, like ~100 clocks for the common case?
> 
> Can you send us a small benchmark that you would like us to optimize?  Presumably you already have one since you've measured the overhead.
> 
> If the current performance is really ~1000 instructions I suspect we can easily knock it down by a large factor.  I'm not sure whether 100 is realistic or not until I play around in there some more.

Also, please send me the configure options that you are using for your MPICH2 under petsc.  The absolute performance is going to vary substantially depending on whether error checking is enabled and your choice of a few other options.

-Dave