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Date: Sun, 28 Apr 2013 22:18:38 +0530
From: Sayantan Datta <>
Subject: Re: GPU support under Windows

Hi Daniel,

I have access to 7970 along with windows 7 x64. I don't do much development
work on windows but I might be available for testing.


On Sun, Apr 28, 2013 at 6:41 PM, Dániel Bali <>wrote:

> Hello!
> Unfortunately I had trouble installing wifi drivers for Ubuntu (then I had
> a libssl-dev conflict when trying to build john) and I'm not at home until
> tomorrow, so I can't report on the Linux results yet.
> I did some more performance tests with the -te flag this time. Here are
> some results showing OpenCL (HD 7670M) against my CPU (i5-3210M)
> OpenCL's results
>     md5crypt: 40046 c/s
>     wpapsk: 4050 c/s
>     phpass: 254015 c/s
>     raw-md5: 32750K c/s
>     raw-sha1: 18881K c/s
> CPU's results:
>     md5crypt: 20941 c/s
>     wpapsk: 1070 c/s
>     phpass: 11239 c/s
>     raw-md5: 19254K c/s
>     raw-sha1: 14691K c/s
>  I am interested in getting OpenCL working on cygwin.  I am interested in
>>> exactly what was required to get OpenCL installed, and buildable in the
>>> cygwin environment overall, even before the JtR target was added.
> I didn't really have to do anything special. The AMD APP SDK was installed
> previously and the correct enviromental variables were set, but I didn't do
> anything specific to Cygwin. For example this command compiles AMD's
> HelloWorld sample:
>  g++ -I"$AMDAPPSDKROOT/include" -L"$AMDAPPSDKROOT/lib/x86" HelloWorld.cpp
> -lOpenCL -o HelloWorld.exe
> I'll report back when I have Linux results.
> Daniel

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