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Date: Tue, 31 Mar 2015 03:46:04 -0700
From: "Jeremi M Gosney" <>
To: <>
Subject: RE: [GSoC] John the Ripper support for PHC finalists

> -----Original Message-----
> From: magnum
> Sent: Monday, March 30, 2015 02:51
> On 2015-03-30 11:11, magnum wrote:
> > Also, your auto-tune settings are totally wrong, possibly ending up in
> > suboptimal work sizes. I will fix them and submit a patch.
> This patch fixes the auto-tune problems. BTW with my other suggestions
> it also runs fine on the GTX Titan, at about same ~10K c/s speed as on
> HD7970. And now it also runs on my Macbook GPU (1290 c/s).

I had to change "char build_opts[64]" to "char build_opts[64] = {0};" in init() in order to get this to run, otherwise it would fail with the following error:

OpenCL error (CL_INVALID_DEVICE) in file (common-opencl.c) at line (969) - (Error while getting build info I)

For some reason I'm seeing half the speeds you're seeing on 290X.

epixoip@...en:~/pomelo/JohnTheRipper/run$ ./john -te -form:pomelo-opencl
Device 0: Hawaii [AMD Radeon R9 200 Series]
Local worksize (LWS) 64, global worksize (GWS) 1024
Benchmarking: pomelo-opencl, POMELO [POMELO OpenCL (inefficient, development use only)]... DONE
Raw:    5535 c/s real, 614400 c/s virtual

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