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Date: Thu, 10 May 2012 02:46:58 +0530
Subject: Re: Sayantan: Weekly Report #3


By "manual unrolling", which I don't like, I am referring to explicit
> duplication of pieces of code in the source file.  In
> currently in magnum-jumbo, you have such manual 4x unroll in PBKDF2() -
> listing 4 separate SHA-1 implementations one after another right in the
> sources.  Well, maybe 2 of them are for HMAC, if so the unroll is 2x.
> Is this right or am I missing something?

Thanks. Done.

On Thu, May 10, 2012 at 12:02 AM, Solar Designer <> wrote:

> Oh, do you mean that the on-CPU portion of MSCash2, which we're
> executing sequentially with the on-GPU code (not in parallel yet), was
> consuming a substantial portion of total time?

Yes. It consumed around 20% of the total time.  The effect is more
pronunced on a system with very fast GPU and slow CPU like bull.

What speed were you getting without OpenMP for this portion?

I was getting around 73k without openmp.

BTW GTX 570 performance has been also improved to 25k c/s with OMP.

Also changed the file name from opencl_MSCASH2_fmt.c to
opencl_mscash2_fmt.c as requested by Lukas.

I have already sent a pull request.


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