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Date: Sun, 15 Apr 2012 06:31:33 +0400
From: Solar Designer <solar@...nwall.com>
To: john-dev@...ts.openwall.com
Subject: Re: Xsha512 OpenCL Code

On Sun, Apr 15, 2012 at 10:06:08AM +0800, myrice wrote:
> On Apr 15, 2012 8:46 AM, "Solar Designer" <solar@...nwall.com> wrote:
> > On Sat, Apr 14, 2012 at 11:13:41PM +0800, myrice wrote:
> > > I just implement XSHA512 on OpenCL. It is already in myrice-JtR of my
> > > github(https://github.com/qqldd/myrice-JtR).
> >
> > Are you sure it's there?  Somehow I don't see it.
> It is on bleeding branch.

OK, I've just tried it out.  There's a performance regression for CUDA:

user@...l:~/john/myrice-JtR/src$ ../run/john -te -fo=xsha512-cuda
Benchmarking: Mac OS X 10.7+ salted SHA-512 [CUDA]... DONE
Many salts:     34754K c/s real, 34754K c/s virtual
Only one salt:  10944K c/s real, 10944K c/s virtual

Increasing THREADS to 512 helps a little bit:

user@...l:~/john/myrice-JtR/src$ ../run/john -te -fo=xsha512-cuda
Benchmarking: Mac OS X 10.7+ salted SHA-512 [CUDA]... DONE
Many salts:     40348K c/s real, 40106K c/s virtual
Only one salt:  11796K c/s real, 11796K c/s virtual

Now the OpenCL stuff:

user@...l:~/john/myrice-JtR/src$ ../run/john -te -fo=xsha512-opencl
OpenCL platform 0: NVIDIA CUDA, 1 device(s).
Using device 0: GeForce GTX 570
Benchmarking: Mac OS X 10.7+ salted SHA-512 [OpenCL]... DONE
Many salts:     25204K c/s real, 22649K c/s virtual
Only one salt:  17086K c/s real, 15649K c/s virtual

user@...l:~/john/myrice-JtR/src$ ../run/john -te -fo=xsha512-opencl -pla=1
OpenCL platform 1: AMD Accelerated Parallel Processing, 2 device(s).
Using device 0: Tahiti
Compilation log: /tmp/OCLbj5mOR.cl(121): warning: type qualifier specified more than once
        __global uint64_t* hash, uint32_t offset, __constant const char* salt)
                                                             ^

/tmp/OCLbj5mOR.cl(224): warning: type qualifier specified more than once
        __constant const char *salt)
                   ^

LOOP UNROLL: pragma unroll (line 182)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 187)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 202)
    Unrolled as requested!

Benchmarking: Mac OS X 10.7+ salted SHA-512 [OpenCL]... FAILED (get_hash[0](0))

user@...l:~/john/myrice-JtR/src$ ../run/john -te -fo=xsha512-opencl -pla=1 -dev=1
OpenCL platform 1: AMD Accelerated Parallel Processing, 2 device(s).
Using device 1: AMD FX(tm)-8120 Eight-Core Processor           
Compilation log: /tmp/OCLxcEdSH.cl(121): warning: type qualifier specified more than once
        __global uint64_t* hash, uint32_t offset, __constant const char* salt)
                                                             ^

/tmp/OCLxcEdSH.cl(224): warning: type qualifier specified more than once
        __constant const char *salt)
                   ^

LOOP UNROLL: pragma unroll (line 182)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 187)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 202)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 182)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 187)
    Unrolled as requested!
LOOP UNROLL: pragma unroll (line 202)
    Unrolled as requested!

Benchmarking: Mac OS X 10.7+ salted SHA-512 [OpenCL]... DONE
Many salts:     10400K c/s real, 1361K c/s virtual
Only one salt:  7809K c/s real, 1207K c/s virtual

Alexander

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