[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <a695931d8354e3c1e744007eb0efc5ba@smtp.hushmail.com>
Date: Wed, 16 Jan 2013 22:33:45 +0100
From: magnum <john.magnum@...hmail.com>
To: john-dev@...ts.openwall.com
Subject: Re: CUDA multigpu first draft for pwsafe
On 16 Jan, 2013, at 22:22 , Lukas Odzioba <lukas.odzioba@...il.com> wrote:
> I am posting this mostly as an archive.
> Thanks to one of john users I got access to GTX 690. This is dual gpu
> card and currently it uses only one of it, which is not good at all.
>
> I attached first draft of multigpu code for pwsafe format, we may not
> commit that now, but it would be great to have it in the next official
> jumbo.
> For identical gpus code scales very well:
> before:
> Raw: 96376 c/s real, 97090 c/s virtual
> after:
> Raw: 192752 c/s real, 192752 c/s virtual
>
> I added "GPUS" macro to cuda_pwsafe.h, so we must set it before
> compilation but, in the final version code will be able to use -dev
> arguments which are now omitted.
> Known problems:
> -code will scale well only if gpus are identical
> -it requires at least cuda 4.0 (this is not checked now)
> -it wasn't heavily tested at all
>
> Good news is that almost all code changes were done in .cu file.
> I'll try create proper patches for other formats.
>
> Lukas
> <cuda_pwsafemultigpu.diff>
Excellent, I will commit this to bleeding (sooner or later) and then we'll sort out any problems.
magnum
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
