Topic: Vertcoin - First Scrypt N | First Stealth Address - Privacy without mixer - page 642. (Read 1232701 times)

I had some time to look into the assembler code.
But now i improve the behaviour of the GPU miner.
Unfortunately i was not able to find performance improvements yet but it is more stable. The TC calculation is better than before / improved for Vertcoin.
-> for all, check the git: https://github.com/Bufius/vertminer-gpu.git

Thanks Bufius, pretty impressive performance increase.

Free bumps for everyone

Whew!!! Glad you got your VTC back.

and now you know how to handle issues within all wallets if this ever occurs again

following my own madness with the app crash while encrypting wallet
finally a .rewrite worked! gah what a pain in the butt.  then of course I couldnt send because I was using the keepass password when my hasty self had pasted my own address into it!

anyways my Verts found and im glad

OK, I have asked vertcoin to include this in the OP (and get it on the website tomorrow maybe), but I thought I'd also post here to give people a head start. Here is a tested "howto" on building the modded cgminer in linux:


For reference, the test build was done on a bare Ubuntu 12.04 LTS which had been freshly installed then updated using:

sudo apt-get update
sudo apt-get upgrade

Contributions of alternative instructions for different distros are appreciated.


First, prepare the necessary dependencies:

sudo apt-get install build-essential git libcurl4-gnutls-dev

Get the modded cgminer:

cd ~/Downloads/
git clone https://github.com/Bufius/vertminer-gpu

Get the main AMD app sdk:

http://developer.amd.com/tools-and-sdks/heterogeneous-computing/amd-accelerated-parallel-processing-app-sdk/downloads/

and get the ADL SDK

http://developer.amd.com/tools-and-sdks/graphics-development/display-library-adl-sdk/

(The ADL SDK is for temp and fan readouts in cgminer)

Manually download the above 2 files into your ~/Downloads/ folder, you cannot wget them because of the way the AMD website works, you'll
have to use a browser and manually download them.

Install the main AMD APP_SDK, make sure to decompress it in a subfolder or it untars in an untidy way:

cd ~/Downloads/
mkdir amd_sdk
mv AMD-APP-SDK-v2.9-lnx64.tgz amd_sdk
cd amd_sdk
tar zxvf AMD-APP-SDK-v2.9-lnx64.tgz
sudo ./Install-AMD-APP.sh

The installer for the APP_SDK seems to break some files, or at least it did during testing. Do the following to fix it:

cd /etc/OpenCL/vendors/

in here are two files amdocl32.icd and amdocl64.icd, you will find their contents (they are just text files) to be "libamdocl32.so" and
"libamdocl64.so" respectively. Edit them to include their full paths, so the contents of amdocl32.icd becomes "/usr/lib32/fglrx/libamdocl32.so"
and the contents of amdocl64.icd becomes "/usr/lib/fglrx/libamdocl64.so"

Make a folder to unzip ADL_SDK into (it unzips in an untidy way otherwise)

mkdir adl
mv ADL_SDK_6.0.zip adl
cd adl
unzip ADL_SDK_6.0.zip

Now copy the headers from the adl sdk into the appropriate folder in the cgminer source:

cd include
cp *.h ~/vertminer-gpu/ADL_SDK

Now we have the build environment ready, so we can:

cd ~/Downloads/vertminer-gpu

and use the included script to build with:

./buildit.sh

You now have a vertminer binary in the vertminer-gpu folder, which you can either copy to your path, or run directly.

Ah, sorry.  Kept thinking I saw something about you being in Germany, but I guess I'm thinking of someone else.

There's a device switch (the command line options for the vert cgminer and standard cgminer are the same), so running with cgminer.exe -d 1 should make it run on the 2nd GPU only (numbering starts at zero). If you had 3 GPUs and only wanted to run on the second two, you'd use -d1 -d2 etc.

faster CPUminer for vertcoin is done, based on pooler-cpuminer.
Source only, no more changes from my side. It is my fear this will be used by botnet operators.

https://github.com/Bufius/cpuminer-vert

More speed than the existing CPU miner for Vertcoin?
-> yes, nearly 4 times faster (with AVX, AMD A4 4000@3Ghz)
    accepted: 51/51 (100.00%), 4.89 khash/s (yay!!!)

Root conf node is in New York.

I think the root conf node is in Germany, right?  So the UK pool should be better for latency, since the latency of the pool is much more important than the latency of your miner.

Yeah you are right it could make a difference, I am from Canada and I think I will return my 1,5Mh/s to Bitcrush instead of Kilovolt... Or should I solomine ?

It's just that i'm in the US (as probably most are, or at least many)

I don't trust the overseas connection for mining.  i mean, some pools even have USEAST and USWEST servers.  latency seems to play a key role, i know it sure as fuck does for solomining stuff

I know code changes lead to hard forking can really screw with things, but it might be a good idea to set the difficulty retarget a bit lower.  Th mining dropped off and we're looking at 5 minute block times for the next several days.

Why are you only mining on US pools ? What's wrong with uk ?

If the 2nd largest wasn't .co.uk i'd have used it.  I'm not using a pool that's like <10% of the network, and i'm not using a pool that doesn't have US servers.  that's probably why info is so high up.

Also who fucking cares, scrypt altcoins always have pools that are like 40-80% of the hashrate sometimes more during their initial week or two.  especially when multicoin pools switch on they can be like 90%+ (granted this wont happen immediately for this because a different algo but still)

nobody freaks out about >50% when a coin just launched within the last week or two

nobody is trading or using the coin for anything except mining so double spends aren't even a threat

I'm running a small pool at skadi.nawk.net:8000 which could use a few more miners.  Spread out, people!

And there goes my trust in this coin, great doing. 


Network Hash rate: 37.730514 Mhash/s

    VTC.POOL.PM - Hashrate: 24 Khash/s - Workers: 4
    LA.VERTCOIN.ORG - Hashrate: 5 Khash/s - Workers: 1
    HK.VERTCO.IN - Hashrate: 28 Khash/s - Workers: 0
    NY.VERTCO.IN - Hashrate: 1.278 Mhash/s - Workers: 5
    EU.VERTCOIN.ORG - Hashrate: 1.978 Mhash/s - Workers: 20
    VTC.KILOVOLT.CO.UK - Hashrate: 6.11 Mhash/s - Workers: 12
    VERT.BITCRUSH.INFO - Hashrate: 22.055 Mhash/s - Workers: 33

Warning, mining on the largest pool can cause problems with the coin. Please choose one of the smaller pools. The smaller pools are automatically moved to the top of the list every 3 minutes.

I'm interested in mining Vertcoin with the modified CGMiner. Can anyone tell me what command I use in CGminer's start file to tell it which of my two GPUs to mine with? I have a second GPU I installed specifically to mine; so I want it to use that, not my primary GPU (which I obviously use to run my computer).