Hey Dia,

So I had to do a fresh install on my computer, but I sent you a small donation just now, lemme know if it went through : D

Anyways, while I was in the process of installing AMD drivers I saw an awesome article about OpenCL 1.2 Preview with SDK 2.6. I'm testing the preview drivers out now since they add a couple new extensions, though I have to figure out the best place to use them. I ran your kernel through the latest APP KernelAnalyzer. I think there are many places it can be optimized as I'm seeing BFI_INT directly from the GPU ISA for many of the rounds, and it looks like there are a lot of new patterns they added to do so.

I also found a really cool pdf on new optimizations that are recommended for OpenCL 1.2, and it is supposed to provide a pretty good performance increase for VLIW4 architecture, and there was one part that I think would solve your VECTORS3 issue or even a better way of achieving it. If you have time send me a PM, and I can send you the pdf.

Anyways, new kernel is a little faster with VECTORS4, but for some reason the temperature is higher. That could just be because of the fresh wipe I did, did anyone else notice their GPU running hotter?

Hello,

Unfortunately the amd_cl_media_ops2 extension has nothing to do with BFI_INT. There are amd_bfe() and amd_bfm() functions defined, but nothing that maps to bfi_int.

Can I have that pdf too please?

There is no documentation yet. Those are the strings carved from libamdocl64.so. Additionaly, I've tested most of them (excluding max3/min3 and the sad ones) and they work. For some reason, you need to compile with -Dcl_amd_media_ops2, because just the pragma does not enable it.

For the full list see this thread:

http://forums.amd.com/devforum/messageview.cfm?catid=390&threadid=157516&messid=1274705&parentid=1274660&FTVAR_FORUMVIEWTMP=Branch

I recall that I mentioned this kernel is for SDK 2.6+, sorry!
It's totally ok for this kernel to not work well for older SDK versions.

Dia

 Why better don't improve kernel for phatk2? It's faster than 1st version and still faster than phatk_dia.

Underclock to 300-370mhz has never been best.  395 is faster.  Fastest?  Not sure. 

I'm glad you found the memory peak that worked for you. However your case is not the absolute correct answer (and is not common, most 5xxx/6xxx cards are at 300MHz), it is just your setup and what works for you; many things will affect performance and where the memory "sweet spot" will be:

GPU model/architecture,
GPU card memory bus/memory size,
GPU core overclock,
Operating System/32or64bit/video card driver,
OpenCL/APP SDK runtime installed on system,
Miner software,
Miner kernel (and it's particular optimizations),
Miner kernel parameters (worksize, vector size),
Compiler/SDK used to create miner,
Libraries installed on system (if running interpreted source)...

So there is no one right answer.

Great you got it working, I only wanted to mention it's intended for 2.6+ .

Dia

Btw.: The current kernel doesn't work with 7970 + GCN seems to dislike vectors for mining.

OH THATS THE TRICK?!?! My 6870's "sweetspot" SEEMS to be 490 with the core at 990! That makes Quite alot of sense!, I was planning on look for a SweetER spot but i felt that 490 "was it" and that i wouldnt find anything better, So i didnt look.

I'm currently working pretty hard on a kernel for 7970 cards and am looking for a few guys, who are willing to test benchmark it.
Please apply in this thread or via PM, you need to have a 7970 card and be on a current Phoenix version with latest Catalyst.
For now I don't want to release the kernel into the wild, sorry ... it's not polished .

Thanks,
Dia