Date: Wed, 20 Jun 2012 17:44:50 +0530 From: SAYANTAN DATTA <std2048@...il.com> To: john-dev@...ts.openwall.com Subject: Re: bf-opencl On Wed, Jun 20, 2012 at 1:44 AM, Solar Designer <solar@...nwall.com> wrote: > On Wed, Jun 20, 2012 at 12:04:13AM +0530, SAYANTAN DATTA wrote: > > How do I compile program written in IL? Is there any documentation > > regarding AMD IL? > > Yes: > > > http://developer.amd.com/sdks/AMDAPPSDK/assets/AMD_Intermediate_Language_(IL)_Specification_v2.pdf > > (506 pages). I think there's a lack of documentation on GCN, though. > > I think we should start by reviewing code generated from OpenCL source, > much like we review x86-64 assembly code generated by gcc. > But as far as I know IL codes are independent of ASICs. So it shouldn't matter whether its GCN or not.However ISA is ASIC dependent. So, did you mean ISA instead of IL? > BTW the bf_kernel is stable upto 1225Mhz core and 1300MHz memory. Does this mean it was no longer stable at 1250 MHz core? Are you > referring to my test from yesterday, where I got ASIC hang at 1250 MHz > after 3.5 minutes? If so, that does not tell me much because I also got > a system reboot after 15 minutes running the same code at stock clocks. > > BTW, changing the memory clock back and forth did not affect bf-opencl > performance at all, which confirms that it indeed does not use global > memory much (in the current code revision). That's good. > > Alexander > I think two or more john builds collided on the same card resulting in crash after 15 min. Otherwise the implementation is perfectly stable at stocks(I tested using pw-fake-unix hashes for 28 minutes). And yes the card is unstable after 1225Mhz core. Content of type "text/html" skipped
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