redcodenl
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July 01, 2011, 12:31:57 PM Last edit: July 01, 2011, 03:48:05 PM by redcodenl |
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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%!)
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Jen4538
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July 01, 2011, 12:52:55 PM |
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thank you very much , this has increased my rate
Jen
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msb8r
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July 01, 2011, 01:48:27 PM |
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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.
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Fiyasko
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Okey Dokey Lokey
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July 01, 2011, 04:34:36 PM |
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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
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Fiyasko
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Okey Dokey Lokey
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July 01, 2011, 04:41:52 PM |
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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
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ercolinux
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July 01, 2011, 11:06:50 PM |
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It works really well:: +3MHs on my 5770 at stock frequencies.
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Bitrated user: ercolinux.
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bitless (OP)
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July 02, 2011, 04:24:53 AM |
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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!
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Krypta
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July 02, 2011, 06:20:46 AM |
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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: 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 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
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bitless (OP)
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July 02, 2011, 06:28:16 AM |
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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; )
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joulesbeef
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moOo
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July 02, 2011, 06:43:37 AM |
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put my 5830 up to 323.6.. very nice
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mooo for rent
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Krypta
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July 02, 2011, 07:03:06 AM |
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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.
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Palmdetroit
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PHS 50% PoS - Stop mining start minting
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July 02, 2011, 07:13:14 AM |
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Thanks boosted mah 6770s ~3%
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karoshi
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July 02, 2011, 08:38:29 AM |
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wow, thanks.
each of my cards is making 357 now instead of 347. I thought these kernels were optimized to the max.
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dafuq
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July 02, 2011, 09:20:11 AM |
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hehe will try it thx
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Gui_0
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July 02, 2011, 08:37:18 PM |
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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
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Alan Lupton
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July 04, 2011, 07:10:40 AM |
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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?
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xurious
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July 04, 2011, 11:44:40 AM |
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This worked for me on all my cards. Roughly 2-4% on 3x 6850's, 5870, and 5770. Thanks!
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SiaMining.com -- First PPS SiaMining Pool! 3%, VarDiff, Stratum Support
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Rob P.
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July 05, 2011, 12:37:41 PM |
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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?
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klaaster
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July 05, 2011, 12:57:34 PM |
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I'm getting 327 with this on a Sapphire Xtreme 5830.
Ubuntu11.04_64, 1030/300/1.2V/66°C
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