Date: Thu, 28 Mar 2013 05:54:41 +0200 From: Milen Rangelov <gat3way@...il.com> To: john-dev@...ts.openwall.com Subject: Re: MPI-openCL build; fast hashes are faster!! Yes, this approach is easier and I took that as well. Instead of trying to use async stuff and events just spawn several threads, each with own context and buffers then do the stuff in parallel on a single device. It wastes a lot of memory indeed, but it's easy and it works. For fast hashes with candidate generation on GPUs it's even better :) On Thu, Mar 28, 2013 at 3:45 AM, magnum <john.magnum@...hmail.com> wrote: > On 27 Mar, 2013, at 22:54 , Sayantan Datta <std2048@...il.com> wrote: > > OpenCL-MPI build using openmpi results in some of the fast hashes to > speed up by 1.5-3x without any extra modification e.g. > raw-md4,raw-md5,raw-sha1 ,xsha512 and des. I haven't tested all hashes but > most of them works fine except the slow hashes which causes asic hangs most > of the time with anything more than 1 thread feeding the GPU. > > You mean with all processes using one same GPU? On what branch was that? > Recent improvements in raw-md4/md5 in bleeding-jumbo has reduced transfer > latencies a lot so that approach should be less rewarding. > > magnum > Content of type "text/html" skipped
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.