Re: vectorization in icc

kf@iki.fi
11 Dec 2002 22:24:55 -0500

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[2 earlier articles]
vectorization in icc aart.bik@intel.com (Bik, Aart) (2002-12-03)
Re: vectorization in icc kfredrik@saippua.cs.Helsinki.FI (Kimmo Fredriksson) (2002-12-07)
vectorization in icc aart.bik@intel.com (Bik, Aart) (2002-12-07)
Re: vectorization in icc terryg@qwest.net (Terry Greyzck) (2002-12-11)
Re: vectorization in icc kf@iki.fi (2002-12-11)
Re: vectorization in icc kf@iki.fi (2002-12-11)
Re: vectorization in icc kf@iki.fi (2002-12-11)
Re: vectorization in icc nmm1@cus.cam.ac.uk (2002-12-13)
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From: kf@iki.fi
Newsgroups: comp.compilers
Date: 11 Dec 2002 22:24:55 -0500
Organization: -
References: 02-12-049
Keywords: parallel, performance
Posted-Date: 11 Dec 2002 22:24:55 EST

Hi again,

Things seem to change if you use larger values than 16 in the inner-loop
counter. Actually, the value is not hard coded, I just experimented with
16, because 128/8=16... In real world apps it can be anything. I tried
160, and the speed-up was about 7.2X, and about 2X over my hand coded
32bit vectorized code... So, things are looking better...

kf

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