Topic: 3% faster mining with phoenix+phatk for everyone - page 4. (Read 36831 times)
This community is awesome. Nice little speed boost. I'm at the ragged edge on core voltage and clock speeds, so this boost was very cool!
Yup worked for me exactly as you said. My 6870 went from 300 to 308. Thanks!
It definitely worked for my 5830! Awesome thanks a bunch bitless 
Yup worked for me exactly as you said. My 6870 went from 300 to 308. Thanks!
I got ~10mhs increase on my 5870's and surprisingly my stale rate actually is a LOT LOT lower then before the mod.
I will certainly be donating as soon as I have some cleared funds bitless, thank you so much for your hard work and I look forward to your next modification you speak of previously. (Do you have any more details on that atm?)
I will certainly be donating as soon as I have some cleared funds bitless, thank you so much for your hard work and I look forward to your next modification you speak of previously. (Do you have any more details on that atm?)
Everything that I've heard so far suggests that the stale rate is completely unrelated to the mod - it is somewhat random (esp. given that hdminer uses something that's equivalent to the mod as well). However, I'm glad that it is low for you at the moment.
No, I don't have any ETA on other modifications. They are complex and may never materialize into code... in which case I'll just post my thoughts on the subject.
Thanks for the donation!
I got ~10mhs increase on my 5870's and surprisingly my stale rate actually is a LOT LOT lower then before the mod.
I will certainly be donating as soon as I have some cleared funds bitless, thank you so much for your hard work and I look forward to your next modification you speak of previously. (Do you have any more details on that atm?)
I will certainly be donating as soon as I have some cleared funds bitless, thank you so much for your hard work and I look forward to your next modification you speak of previously. (Do you have any more details on that atm?)
Bitless, sent my donation to you as well. Thank you for sharing your findings, giving to the community is what this should be about. There will be plenty of time for profits later, here's to hoping you'll be adequately rewarded for your finding and work.
Thanks a lot! I hope you'll figure out the issues that you've having with your mining after the patch. If I think of anything that can be of help, I'll post it too.
Just tossing my confirmations out there:
Sapphire 5830s:
Pair 1: 264 Mhash/sec -> 271 Mhash/sec (each) at 875 MHz GPU, 900 MHz RAM (2.58% increase)
Pair 2: 273 Mhash/sec -> 281 Mhash/sec (each) at 900 MHz GPU, 600 MHz RAM (2.84% increase)
I'm also tracking Rejected shares.
Before Patch:
Pair 1: ~2.6% rejects (after 800+ shares)
Pair 2: ~3.2% rejects (after 800+ shares)
After Patch:
Pair 1: ~3.0% rejects (after 650+ shares)
Pair 2: ~4.0% (after 750+ shares)
So, the increase appears to also cause additional rejects that should be discounted from total increase gain, cutting it down a full 1% in my case.
Sapphire 5830s:
Pair 1: 264 Mhash/sec -> 271 Mhash/sec (each) at 875 MHz GPU, 900 MHz RAM (2.58% increase)
Pair 2: 273 Mhash/sec -> 281 Mhash/sec (each) at 900 MHz GPU, 600 MHz RAM (2.84% increase)
I'm also tracking Rejected shares.
Before Patch:
Pair 1: ~2.6% rejects (after 800+ shares)
Pair 2: ~3.2% rejects (after 800+ shares)
After Patch:
Pair 1: ~3.0% rejects (after 650+ shares)
Pair 2: ~4.0% (after 750+ shares)
So, the increase appears to also cause additional rejects that should be discounted from total increase gain, cutting it down a full 1% in my case.
Bitless, sent my donation to you as well. Thank you for sharing your findings, giving to the community is what this should be about. There will be plenty of time for profits later, here's to hoping you'll be adequately rewarded for your finding and work.
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...Same here, actually. I was ok with 6870 overclocked to 1000 MHz, but after the change it became unstable so I had to go down to 975, which is kinda sad. Yet, I blame it on poor ventilation in my case, so may be I'll get it running at 1000 again, eventually
Donation sent. not much, but hopefully we can get a bunch of little donations headed your way!
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... 
I agree Bitless deserves more donation. But the truth about mining is that if EVERYONE gets 3% improvement, the difficulty level will just go up by 3% and everyone ends up making the same. So that's why some people may be hiding their private optimizations so that only they alone benefit. Anyways, but I truly appreciate what Bitless has done. Hope you get more donations.
This is one of those moments when you think... is it right to make over 60 bucks for 1 LOC? Is it right to make just a measly 60 bucks for giving EVERYONE 3% more money?
Do the math on how much extra income hundreds of people are getting, and then answer that.
Also, I didn't want to say anything at first since it could have been an anomaly, but I've now realized this on four separate cards - 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.
I can say however, that I very much appreciated that speedup you posted, as did many others, and I hope you get many more BTC than the five you currently had donated to you at http://blockexplorer.com/address/15igh5HkCXwvvan4aiPYSYZwJZbHxGBYwB
He actually had 1.4 BTC from other sources, but surely for such a small and important contribution he is rewarded decently.This is one of those moments when you think... is it right to make over 60 bucks for 1 LOC? Is it right to make just a measly 60 bucks for giving EVERYONE 3% more money?
Also makes me wonder why people don't post them for everyone to see. So, 3% or even 5% speed increase doesn't really matter all that much if you're just a regular guy with a couple of ATI cards, right? Or am I wrong?
PcChip - give me your best advice, should I keep my next optimization to myself or post it?
PcChip - give me your best advice, should I keep my next optimization to myself or post it?
I can't answer that my friend, only you can.
If you're the type of person who loves tinkering with asm/opencl/hardeware code just for fun, and improving things for the community (which it seems like you are, and a redditor as well - highfive! [Did you go to a reddit meetup saturday?]) then it makes sense to continue posting them like you are.
If you're in bitcoin for profits, and want to use your intelligence to tweak the code to give yourself a (totally fair) advantage over the competition, then obviously it's not in your best interest to post it. Note that I'm not saying there's anything wrong with this scenario, because I can't even say which route I'd pick myself.
I can say however, that I very much appreciated that speedup you posted, as did many others, and I hope you get many more BTC than the five you currently had donated to you at http://blockexplorer.com/address/15igh5HkCXwvvan4aiPYSYZwJZbHxGBYwB
I was wondering when the community would discover this optimization... nice one bitless :-)
Makes me wonder how many other private modifications are in use right now
Also makes me wonder why people don't post them for everyone to see. So, 3% or even 5% speed increase doesn't really matter all that much if you're just a regular guy with a couple of ATI cards, right? Or am I wrong?
PcChip - give me your best advice, should I keep my next optimization to myself or post it?
I was wondering when the community would discover this optimization... nice one bitless :-)
Makes me wonder how many other private modifications are in use right now
A small donation coming your way for the excellent work
Many thanks!
Many thanks!
I was wondering when the community would discover this optimization... nice one bitless :-)
For the record, hdminer has implemented this maj() optimization since day 1:
Phoenix is probably very close to hdminer's performance now, on HD 69xx.
For the record, hdminer has implemented this maj() optimization since day 1:
Code:
# ibit_extract patched to BFI_INT at runtime
$code .=
" ixor $tmp0, $a, $b\n".
" ibit_extract $tmp0, $a, $c, $tmp0\n";
$code .=
" ixor $tmp0, $a, $b\n".
" ibit_extract $tmp0, $a, $c, $tmp0\n";
Phoenix is probably very close to hdminer's performance now, on HD 69xx.
Dude, awesome
so this accounts for 3% out of your 6.4% improvement, where are the other 3.4% coming from? I don't have 250 btc, in fact I only have ~2 that have been donated to me so far. (Please note - if you decide to share this, post it,don't pm me )
412 to 423 on my 5870
290 to 302 on my 5830s
290 to 302 on my 5830s
Just tossing my confirmations out there:
...
So, the increase appears to also cause additional rejects that should be discounted from total increase gain, cutting it down a full 1% in my case.
...
So, the increase appears to also cause additional rejects that should be discounted from total increase gain, cutting it down a full 1% in my case.
This is really not good. I honestly do not know why this would happen; are you sure it is related to the patch and isn't a result in the general randomness when searching for solutions? Perhaps someone else, more familiar with bitcoin mining than me, can chime in?
Not saying it's the patch, just reporting the results. That's why I posted the population of shares each measurement was done over.
If my reject rates are higher over a prolonged period, then I may change one of my cards running on the same rig, back to the old kernel values and compare them head to head over a few days.
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