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Message-ID: <de77125fb7328ebc029c92686a1c6703@smtp.hushmail.com>
Date: Tue, 9 Jul 2013 10:17:22 +0200
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: String pass to GPU and get back
On 9 Jul, 2013, at 7:31 , marcus.desto <marcus.desto@...pl> wrote:
>> 8 July 2013 00:36 magnum <john.magnum@...hmail.com>:
>>> Just looking at your code I think you miss an enqueueReadBuffer() of bufferA before running the kernel.
>>
>> Obviously I meant enqueueWriteBuffer
>>
>> magnum
>>
>
> You are right.
>
> queue.enqueueWriteBuffer(bufferA, CL_TRUE, 0, bufferA_size * sizeof(cl_uchar), password);
>
> was missing, but without it the result was still somehow correct. I am wondering.
Some hardware/software configurations may work without the enqueueWriteBuffer because it ends up a zerocopy anyway. But you should never omit it even if it seems to work. On lots of other platforms it would not have worked at all.
magnum
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