3% faster mining with phoenix+phatk for everyone

[redcodenl]

Krypta:

I've seen that before as well, I didn't change it, but it sure looks like it shouldn't even compile!
I haven't tried the alterations yet, but will do so when I come home!

UPDATE: It works great, increase on both 6870's from 287 to 296 (> 3%!)

[Jen4538]

thank you very much , this has increased my rate


Jen

[msb8r]

Anyone tried this using guiminer?  I can see the file but not sure if I just edit the portion:

// Ma can also be implemented in terms of BFI_INT...
   #define Ma(x, y, z) amd_bytealign((y), (x | z), (z & x))

This patch works fine with guiminer as well. And yes, just edit the portion you posted.

[Fiyasko]

Seeing all these success stories makes me wonder if the file i downloaded was actually assembled correctly.
When apply this little 'tweak'
my mh/sec rate increses by seeming 2mhash/s per 6870 core But, the value at what im hashing at jumps all the fuck over the place. like 20-150-270-279-410-4-89.
It's rediculos

[Fiyasko]

Seeing all these success stories makes me wonder if the file i downloaded was actually assembled correctly.
When apply this little 'tweak'
my mh/sec rate increses by seeming 2mhash/s per 6870 core But, the value at what im hashing at jumps all the fuck over the place. like 20-150-270-279-410-4-89.
It's rediculos

Yup, T'was compiled wrong.

Everyone update your GUIminer client
This beautiful tweak fix has been intergrated into the newest update, No weird fiddling required

And i can confirm that i've gained 10mh/s/core now 6870BE

[ercolinux]

It works really well:: +3MHs on my 5770 at stock frequencies.

[bitless]

Krypta - it looks like r0() and r1() aren't used; try deleting them if you like.

Note that they aren't used by the phatk kernel that I've got, and even though I can't think of circumstances in which r0() will compile correctly, still, be careful if your kernel is different!

[Krypta]

Thank you bitless, it seems you are right, they are never used, so I really don't know why these modifications halved my stales.

Here's another strange thing:

Code:

256	Vals[0]=H[0];
257	Vals[1]=H[1];
258	Vals[2]=H[2];
259	Vals[3]=H[3];
260	Vals[4]=H[4];
261	Vals[5]=H[5];
262	Vals[6]=H[6];
263	Vals[7]=H[7];
264
265	Vals[7] = 0xb0edbdd0 + K[0] + W[64] + 0x08909ae5U;
266	Vals[3] = 0xa54ff53a + 0xb0edbdd0 + K[0] + W[64];

I think we can comment out

Code:

259	//Vals[3]=H[3];
263	//Vals[7]=H[7];

because they are changed on lines 265 and 266 before they are used, am I right?

Thanks.
Krypta

[bitless]

You may be right. May I suggest you run the kernel analyzer and see the disasm of both versions and see if the generated code is any different?

(This is because things like x=1; x=2; x=3; are easily converted by the compiler to just x=3;  )

[joulesbeef]

put my 5830 up to 323.6.. very nice

[Krypta]

You may be right. May I suggest you run the kernel analyzer and see the disasm of both versions and see if the generated code is any different?

(This is because things like x=1; x=2; x=3; are easily converted by the compiler to just x=3;  )

You are right, it's the same 

No improvement then...

K.

[Palmdetroit]

Thanks boosted mah 6770s ~3%

[karoshi]

wow, thanks.

each of my cards is making 357 now instead of 347. I thought these kernels were optimized to the max.

[dafuq]

hehe will try it thx

[Gui_0]

my GPU usage (and thus hashrate) has always fluctuated like a small sine wave from 99% - 90% , after this patch, they all stay a straight line 99% , so that's way more than a 3% increase in hashrate for me.

What's weird, mine went from 90%-96% to 96% straight but the added performance adds 1.5C to the temperature, I might have to clock down a bit to get tot he previous 90C stable line, which means I am forfeiting the benefits of the above optimization. At least I use less energy, the Earth will thank us all...

You're still being more efficient and saving money by using less energy. His optimization made your load a constant 96% instead of 90%-96%, so your GPU has less time to cool. You should still get as many hashes as you did before, if not more, plus less energy

[Diapolo]

Did you guys try my phatk kernel-mod from here: http://forum.bitcoin.org/index.php?topic=25135.0
I really would like to get some feedback .

Thanks,
Dia

[Alan Lupton]

Did anybody experience more rejected packages? I used to be a 99.xx% guy, but now I'm down to 96.5 - 97%. I'm talking about 6 workers on 2 different systems. Coincidence?

[xurious]

This worked for me on all my cards. Roughly 2-4% on 3x 6850's, 5870, and 5770. Thanks!

[Rob P.]

put my 5830 up to 323.6.. very nice

Hmmm, that's a helluva rate for a 5830.  Can you share your voltage, GPU, and RAM clocks please?

[klaaster]

I'm getting 327 with this on a Sapphire Xtreme 5830.

Ubuntu11.04_64, 1030/300/1.2V/66°C