Date: Sun, 24 May 2015 05:57:17 +0300 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: PHC: Parallel in OpenCL Agnieszka, I changed the message Subject for this sub-thread. On Sat, May 23, 2015 at 01:50:57PM +0200, Agnieszka Bielec wrote: > I was trying to optimize sha512block in parallel but when i was > copying this functions from various Claudio Andre's source codes the > result wasn't better, was one case when the speed was greater on super > for --dev=5 from 35k to 40k and on my laptop from 26k to 28k but on > --dev=1 the speed decreased from 40k to 20k or 10k, also I was > modifying slightly two versions of Claudio Andre's sha512 but the > speed didn't increase Please note that Claudio has a separate OpenCL kernel for GCN, such as --dev=1 on super: [solar@...er opencl]$ ls -1 cryptsha512_kernel_* cryptsha512_kernel_DEFAULT.cl cryptsha512_kernel_GCN.cl cryptsha512_kernel_GPU.cl I guess you took code from cryptsha512_kernel_GPU.cl? It isn't meant to be the best on --dev=1. I guess you should use code from cryptsha512_kernel_GCN.cl for it, with runtime detection of GCN arch like in opencl_cryptsha512_fmt_plug.c: init(). It may be better to pass some -D and use #ifdef than to use entirely separate kernel source files, though. Alexander
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