Channel 9 - Discussions by siddpuri http://mschnlnine.vo.llnwd.net/d1/Dev/App_Themes/C9/images/feedimage.png Channel 9 - Discussions by siddpuri http://channel9.msdn.com/Niners/siddpuri/Discussions Channel 9 keeps you up to date with the latest news and behind the scenes info from Microsoft that developers love to keep up with. From LINQ to SilverLight – Watch videos and hear about all the cool technologies coming and the people behind them. http://channel9.msdn.com/Niners/siddpuri/Discussions en Wed, 22 May 2013 12:03:54 GMT Wed, 22 May 2013 12:03:54 GMT Rev9 0 0 0 Coffeehouse - Microsoft Research: Accelerator Maybe it was a bit sneaky, but really only a bit.  Smiley

Two things to consider:

1) PCIe is much better than AGP and transferring data back.  In effect, the asymmetry has been erased.

2) On the smaller benchmarks, the communication time is kind of irrelevant.  If convolving with a 5x5 filter is your entire computation, then it’s probably not worth parallelizing anyway.  For the larger benchmarks, take StereoMatch as an example.  The communication time adds < 25%.  That’s pretty small compared to a 4x speedup over  C++.

Sidd

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