Date: Tue, 24 Apr 2012 11:07:26 -0300 From: Claudio André <claudioandre.br@...il.com> To: john-dev@...ts.openwall.com Subject: Re: New RAR OpenCL kernel -  Again ---------- Hi, see atached files. Please, try to see that 2560 seems to be a "magic number". - TXT: raw results (no profiler) - The same CSV file. - And some more summary information. Profiler using: Local worksize (LWS) 256, Global worksize (KPC) 2560 ---- src/opencl/rar_kernel.cl | 34 ++++++++------ src/rar_fmt.c | 116 ++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 122 insertions(+), 28 deletions(-) ---- Em 22-04-2012 22:07, magnum escreveu: > On 04/23/2012 12:02 AM, Claudio AndrÃ© wrote: >>> Would both these figures by closer to 100 in a dream scenario, or what? >>> >>> By the way my previous version of rar got an "occupancy" of 0.01 or so >>> (lol) in nvidia profiler. We'll see if there is any change now. >>> >>> magnum >>> >> I like the "dream scenario". Valid explanation. And 100 is the target. >> >> Alu packing has a "> 70" expectation. >> Alubusy is where 100% is optimal. >> >> I agree that sprofile is not very useful, but is better than nothing (or >> simple guessing). Since you have NVIDIA tools, it is not that important. > I think sprofile is useful, it's just that my laptop GPU is so weak I > can't draw any conclusions. > > Your profiling info was with LWS=GWS. Please try this if you have the time: > > 1. Pull latest git > 2. Run with KPC=0 (I expect it to pick 4096 or higher as best) > 3. Do another profiling run with the best KPC > > The ALU figures (and speed) should go up a lot (I hope). If they are > not, the profiling info should tell why. > > thanks, > magnum > View attachment "0_api_trace_sum.KernelSummary.html" of type "text/html" (35575 bytes) View attachment "0_api_trace_sum.Top10DataTransferSummary.html" of type "text/html" (37179 bytes) View attachment "0_api_trace_sum.Top10KernelSummary.html" of type "text/html" (37258 bytes) View attachment "0_perf_counter.csv" of type "text/csv" (6079 bytes)
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