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Date: Sat, 4 May 2013 17:29:07 -0400
From:  <>
Subject: SSE - PARA

We may want to audit our SSE-PARA values.  I just checked a few on my 64 bit VM, building with icc, and both 32 and 64 bit were non-optimal.

Current icc:  SHA1_SSE_PARA set to 2 for both 32 and 64 bit.

Timing using dyna_26

para-2  64 bit, 12.5k  32 bit 10.2k
para-1  64 bit, 13.5k  32 bit 12.8k

I have not looked much deeper.  I am working on some SSE porting, and was simply doing some testing at different sse-para settings.  Right now, I have bugs to work through, if PARA is > 1 for my pbkdf2-hmac-sha1 logic, but will get that fixed up 'soon'.  I just wanted to report these findings while it was fresh in my memory.


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