Bitcoin Forum
December 05, 2016, 08:35:45 AM *
News: Latest stable version of Bitcoin Core: 0.13.1  [Torrent].
 
   Home   Help Search Donate Login Register  
Pages: « 1 [2] 3 »  All
  Print  
Author Topic: another 3% mining increase with poclbm kernel.cl  (Read 8972 times)
dinker
Member
**
Offline Offline

Activity: 102



View Profile
June 27, 2011, 10:28:27 PM
 #21

I'll wait for everyone to report back before I try out something from a guy named goxed  Roll Eyes

Help Me Help You Donations:
14kP6tNtrz3woESs9nEE5aDB81QTybGyyZ
1480926945
Hero Member
*
Offline Offline

Posts: 1480926945

View Profile Personal Message (Offline)

Ignore
1480926945
Reply with quote  #2

1480926945
Report to moderator
1480926945
Hero Member
*
Offline Offline

Posts: 1480926945

View Profile Personal Message (Offline)

Ignore
1480926945
Reply with quote  #2

1480926945
Report to moderator
1480926945
Hero Member
*
Offline Offline

Posts: 1480926945

View Profile Personal Message (Offline)

Ignore
1480926945
Reply with quote  #2

1480926945
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
MiningBuddy
Moderator
Legendary
*
Offline Offline

Activity: 1058


฿itcoin ฿itcoin ฿itcoin


View Profile
June 27, 2011, 10:45:18 PM
 #22

Just tried this on my quad 5870 setup on ubuntu 11.04 using CC 11.5, SDK 2.1, using phoenix and poclbm + the 3% boost from http://forum.bitcoin.org/index.php?topic=22965.0
my hash rate went from 428.57 down to 426.26

nelisky
Legendary
*
Offline Offline

Activity: 1554


View Profile
June 27, 2011, 10:46:51 PM
 #23

Well, marking it __local actually hints the opencl compiler on to where you want that variable to be stored. Local memory is the fastest iirc but there's a limited amount of it and if you are already on the limit you may end up getting the wrong thing in local memory, thus making everything slower.

This is obviously an oversimplification. For a little more " to the metal " kind of facts, my experimentation gives me:
- The 1~2% speed increase on a 5870, which can do -w 256 but is at the performance peak at -w 128.
- A fair amount of speed DECREASE on a 5970, with -w 256 which is where it performs best.
- The 1~2% speed increase on the same 5970, with -w 128, although even with the speed increase it's a little slower than the -w 256.

I'm using one of each 5970 and 5870 on a computer, but I don't want to use separate kernels, one for each card, so I'm stuck with the no __local version Sad
ThatOtherDude
Newbie
*
Offline Offline

Activity: 21


View Profile
June 27, 2011, 11:51:43 PM
 #24

basically, add a  __local  key keyword to this line and it should increase your performance.
Sorry, this doesn't work for me, performance dropped 33% instead.
Are you using an ATI card? I know that I get a similar drop on my Nvidia, but I only have one and no ATI.  This may only work with ATI, all the reports are with ATI cards.

Since all the cool kids are doing it, here is my donation address: 1FZeuMzGy5GZPZofQaReMzq4rzJuyUJvZy.  Any amount is welcome.
bonker
Sr. Member
****
Offline Offline

Activity: 462



View Profile
June 28, 2011, 12:07:04 AM
 #25

basically, add a  __local  key keyword to this line and it should increase your performance.
Sorry, this doesn't work for me, performance dropped 33% instead.
Are you using an ATI card? I know that I get a similar drop on my Nvidia, but I only have one and no ATI.  This may only work with ATI, all the reports are with ATI cards.

Only works with ATI card mate. Nvidia are a load of bollocks anyway with Bitcoin, total waste of time. 

BTC: 1FU1EX4xCEt26rezoNaEZ1rhbqA4VVP8pq
LTC: Li8UYJprncRwmNzvRs53UG714Lcps2Yy8R
goxed
Legendary
*
Offline Offline

Activity: 1568


Mining hardware dev and reviewer.


View Profile
June 28, 2011, 01:16:19 AM
 #26

I'll wait for everyone to report back before I try out something from a guy named goxed  Roll Eyes
Smiley

Looking to review Bitcoin / Crypto mining Hardware.
Jack of Diamonds
Sr. Member
****
Offline Offline

Activity: 252



View Profile
June 28, 2011, 01:51:03 AM
 #27

Didn't do anything to be honest. No performance dip but no increase either.

Tried on a 6990 and a 5850.

1f3gHNoBodYw1LLs3ndY0UanYB1tC0lnsBec4USeYoU9AREaCH34PBeGgAR67fx
BombaUcigasa
Legendary
*
Offline Offline

Activity: 1414



View Profile
June 28, 2011, 02:00:29 AM
 #28

basically, add a  __local  key keyword to this line and it should increase your performance.
Sorry, this doesn't work for me, performance dropped 33% instead.
Are you using an ATI card? I know that I get a similar drop on my Nvidia, but I only have one and no ATI.  This may only work with ATI, all the reports are with ATI cards.
'
Sure, but why?!
bitless
Newbie
*
Offline Offline

Activity: 28


View Profile
June 28, 2011, 02:45:23 AM
 #29

I've just tried this, didn't help me at all, but I've sent some BTCs your way anyways; thanks for trying to make it better!
figvam
Jr. Member
*
Offline Offline

Activity: 42


View Profile
June 28, 2011, 06:14:19 AM
 #30

Got about 2.5-3% less on a HD 4650.
PcChip
Sr. Member
****
Offline Offline

Activity: 294



View Profile
June 28, 2011, 07:17:12 AM
 #31

Went from 130 MH/s to 70 MH/s on my GTX570

All rates with Phoenix 1.50 / PhatK
------------------------------------------------------------------------------------------------------------------------------
5850 - 400 MH/s  |  5850 - 355 MH/s | 5830 - 310 MH/s  |  GTX570 - 115 MH/s | 5770 - 210 MH/s | 5770 - 200 MH/s
anty
Jr. Member
*
Offline Offline

Activity: 40



View Profile WWW
June 28, 2011, 11:50:06 AM
 #32

Decreases my hashrate on my 5850 from 370 (with the first 3%-fix) to 368.

huayra.agera
Full Member
***
Offline Offline

Activity: 154



View Profile
June 28, 2011, 11:50:57 AM
 #33

It seems the new poclbm already includes the 3%+ boost including the phatk kernel. No need to edit code.  Smiley. I have tested it and it matches my hashrate with the edited code.
Download here: http://forum.bitcoin.org/index.php?topic=1334.0

BTC: 1JMPScxohom4MXy9X1Vgj8AGwcHjT8XTuy
zerokwel
Sr. Member
****
Offline Offline

Activity: 466



View Profile
June 28, 2011, 04:37:14 PM
 #34

It seems the new poclbm already includes the 3%+ boost including the phatk kernel. No need to edit code.  Smiley. I have tested it and it matches my hashrate with the edited code.
Download here: http://forum.bitcoin.org/index.php?topic=1334.0

When I first looked at this I was thinking yea right... I was using GUI miner but decided I wanted something more command line when I set my second box up so I can just make a .bat file and stick it in startup.

Anyway up from 198mhash to 212 on a 5770. And up from 262 to 285 on a 6870
Roland68
Member
**
Offline Offline

Activity: 103



View Profile
June 28, 2011, 04:42:11 PM
 #35

Used the file posted here ...

no changes on my 5830 ...

looks like guiminer was already "optimized" for my card ...

nice mod anyway

N4rk0
Newbie
*
Offline Offline

Activity: 28


View Profile
June 28, 2011, 07:14:40 PM
 #36

AFAIK declaring those variable as local will make theme shared for all the the threads in the workgroup so it's possible to have a performance increase because you are using less memory , but speed doesn't matter when the calculations are all fucked up! !
biohazord
Newbie
*
Offline Offline

Activity: 8


View Profile
June 29, 2011, 04:57:13 AM
 #37

I made this change for my two 6950's (unlocked 908/310 and 850/310). The one clocked at 908 went up about 1 MH/s while the other went up 3-4 MH/s . I did the initial 3% increase mod and my rate shot up from 380 MH/S to 404 MH/s. To say the least I was more then pleased. After making this change it went from 404 to 405 (I sometimes see it jump to 405.Cool. I'm not sure about my other cards numbers pre initial 3% increase but I remember it was on track with 3%.

I'm going to keep my eye on stales and make sure they don't creep up. I'm not too worried.

Every bit helps. Thanks!
xanatos
Jr. Member
*
Offline Offline

Activity: 41


View Profile
June 29, 2011, 05:30:41 AM
 #38

On my 5870 it jumped 16 mh from 385 to 401. I'm using the poclbm "old" kernel + the other +3% patch (that gives me only 1% of speedup :-( )
ThatOtherDude
Newbie
*
Offline Offline

Activity: 21


View Profile
June 29, 2011, 06:05:44 AM
 #39

basically, add a  __local  key keyword to this line and it should increase your performance.
Sorry, this doesn't work for me, performance dropped 33% instead.
Are you using an ATI card? I know that I get a similar drop on my Nvidia, but I only have one and no ATI.  This may only work with ATI, all the reports are with ATI cards.

Only works with ATI card mate. Nvidia are a load of bollocks anyway with Bitcoin, total waste of time. 
Ah, thanks for confirming my suspicions.  I've heard that ATI is the way to go when mining; however, Nvidia is a better choice for what I use my computer for mostly.  Tongue

Since all the cool kids are doing it, here is my donation address: 1FZeuMzGy5GZPZofQaReMzq4rzJuyUJvZy.  Any amount is welcome.
MiningBuddy
Moderator
Legendary
*
Offline Offline

Activity: 1058


฿itcoin ฿itcoin ฿itcoin


View Profile
June 29, 2011, 08:37:23 AM
 #40

On my 5870 it jumped 16 mh from 385 to 401. I'm using the poclbm "old" kernel + the other +3% patch (that gives me only 1% of speedup :-( )
Weird, what's the rest of your setup? I've listed mine above and this mod decreases my performance on every 5870 I have tried, mix of ubuntu/windows, ati versions & sdk.

Pages: « 1 [2] 3 »  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!