Whitepaper - Ethereum Classic With Cover

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Ethereum Classic Documentation, Release 0.1 If you’re on 15.04, Go to “Software and Updates > Additional Drivers” and set it to “Using video drivers for the AMD graphics accelerator from fglrx”. If you’re on 14.04, go to “Software and Updates > Additional Drivers” and set it to “Using video drivers for the AMD graphics accelerator from fglrx”. Unfortunately, for some of you this will not work due to a known bug in Ubuntu 14.04.02 preventing you from switching to the proprietary graphics drivers required to GPU mine. So, if you encounter this bug, and before you do anything else, go to “Software and updates > Updates” and select “Pre-released updates trusty proposed”. Then, go back to “Software and Updates > Additional Drivers” and set it to “Using video drivers for the AMD graphics accelerator from fglrx”). After rebooting, it’s well worth having a check that the drivers have now indeed been installed correctly (For example by going to “Additional Drivers” again). Whatever you do, if you are on 14.04.02 do not alter the drivers or the drivers configuration once set. For example, the usage of aticonfig –initial (especially with the -f, –force option) can ‘break’ your setup. If you accidentally alter their configuration, you’ll need to de-install the drivers, reboot, reinstall the drivers and reboot. Mac set-up wget http://developer.download.nvidia.com/compute/cuda/7_0/Prod/local_installers/cuda_7.0.29_mac.p sudo installer -pkg ~/Desktop/cuda_7.0.29_mac.pkg -target / brew update brew tap ethereum/ethereum brew reinstall cpp-ethereum --with-gpu-mining --devel --headless --build-from-source You check your cooling status: aticonfig --adapter=0 --od-gettemperature Windows set-up Download the latest Eth++ installation and choose ethminer at the “Choose Components” screen of the installation screen. 1.6. Mining 69
Ethereum Classic Documentation, Release 0.1 Using ethminer with geth geth account new // Set-up ethereum account if you do not have one geth --rpc --rpccorsdomain localhost 2>> geth.log & ethminer -G // -G for GPU, -M for benchmark tail -f geth.log ethminer communicates with geth on port 8545 (the default RPC port in geth). You can change this by giving the --rpcport option to geth. Ethminer will find geth on any port. Note that you need to set the CORS header with --rpccorsdomain localhost. You can also set port on ethminer with -F http://127.0.0.1:3301. Setting the ports is necessary if you want several instances mining on the same computer, although this is somewhat pointless. If you are testing on a private chain, we recommend you use CPU mining instead. Note: You do not need to give geth the --mine option or start the miner in the console unless you want to do CPU mining on TOP of GPU mining. If the default for ethminer does not work try to specify the OpenCL device with: --opencl-device X where X is {0, 1, 2,...}. When running ethminer with -M (benchmark), you should see something like: Benchmarking on platform: { "platform": "NVIDIA CUDA", "device": "GeForce GTX 750 Ti", "version": Benchmarking on platform: { "platform": "Apple", "device": "Intel(R) Xeon(R) CPU E5-1620 v2 @ 3.70 To debug geth: geth --rpccorsdomain "localhost" --verbosity 6 2>> geth.log To debug the miner: make -DCMAKE_BUILD_TYPE=Debug -DETHASHCL=1 -DGUI=0 gdb --args ethminer -G -M Note: hashrate info is not available in geth when GPU mining. Check your hashrate with ethminer, miner.hashrate will always report 0. Using ethminer with eth Mining on a single GPU In order to mine on a single GPU all that needs to be done is to run eth with the following arguments: eth -v 1 -a 0xcadb3223d4eebcaa7b40ec5722967ced01cfc8f2 --client-name "OPTIONALNAMEHERE" -x 50 -m o • -v 1 Set verbosity to 1. Let’s not get spammed by messages. • -a YOURWALLETADDRESS Set the coinbase, where the mining rewards will go to. The above address is just an example. This argument is really important, make sure to not make a mistake in your wallet address or you will receive no ether payout. • --client-name "OPTIONAL" Set an optional client name to identify you on the network • -x 50 Request a high amount of peers. Helps with finding peers in the beginning. • -m on Actually launch with mining on. • -G set GPU mining on. 70 Chapter 1. Contents
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Index A abiDefinition, 82 C code, 8
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