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Date: Thu, 21 Mar 2013 00:40:51 +0200
From: Milen Rangelov <gat3way@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: clLinkProgram() and clCompileProgram()

Keep in mind that is OpenCL 1.2 and it may not work on older hardware.

On Wed, Mar 20, 2013 at 8:42 PM, Sayantan Datta <std2048@...il.com> wrote:

> Hi Brian,
>
>
> On Wed, Mar 20, 2013 at 11:41 PM, Brian Wallace <bwall@...nbwall.com>wrote:
>
>>  I was thinking about doing this with Bitcoin mining(similar concept),
>> where instead of passing in data, compile the kernels at run time with the
>> static data for each block to be solved hard coded and possibly optimized.
>> Could be useful for long hashes with salts that we use once for many hashes.
>>
>> https://www.openbwall.com/entry/Optimizing-Bitcoin-Miner-Idea
>> ------
>> bwall@...nbwall.com - NOT to be confused with openwall.com
>>
>> On 03/20/2013 01:54 PM, Sayantan Datta wrote:
>>
>> Hi all,
>>
>>  I don't know if you have seen them before but I found two cl* functions
>> that would allow us to compile and link the opencl binaries at runtime.
>>  Hopefully the linking process will be much faster than rebuilding the
>> executables from source.
>>
>>
>> http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clLinkProgram.html
>>
>> http://www.khronos.org/registry/cl/sdk/1.2/docs/man/xhtml/clCompileProgram.html
>>
>>  Regards,
>> Sayantan
>>
>>
>> Yes exactly, I was trying to hardcode the salts for DES. At the moment it
> takes nearly 20 minutes to build all(4096) the hardcoded kernels on OCed
> 2500k which is really nasty. Maybe now I can compile the main program once
> and then compile the hardcoded salts and link them at runtime as required.
>
> Regards,
> Sayantan
>

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