github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/eth/gpu_mining.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  // +build opencl
    18  
    19  package eth
    20  
    21  import (
    22  	"fmt"
    23  	"math/big"
    24  	"strconv"
    25  	"strings"
    26  	"time"
    27  
    28  	"github.com/ethereumproject/ethash"
    29  	"github.com/ethereumproject/go-ethereum/common"
    30  	"github.com/ethereumproject/go-ethereum/core/types"
    31  	"github.com/ethereumproject/go-ethereum/logger"
    32  	"github.com/ethereumproject/go-ethereum/logger/glog"
    33  	"github.com/ethereumproject/go-ethereum/miner"
    34  )
    35  
    36  func (s *Ethereum) StartMining(threads int, gpus string) error {
    37  	eb, err := s.Etherbase()
    38  	if err != nil {
    39  		err = fmt.Errorf("Cannot start mining without etherbase address: %v", err)
    40  		glog.V(logger.Error).Infoln(err)
    41  		return err
    42  	}
    43  
    44  	// GPU mining
    45  	if gpus != "" {
    46  		var ids []int
    47  		for _, s := range strings.Split(gpus, ",") {
    48  			i, err := strconv.Atoi(s)
    49  			if err != nil {
    50  				return fmt.Errorf("Invalid GPU id(s): %v", err)
    51  			}
    52  			if i < 0 {
    53  				return fmt.Errorf("Invalid GPU id: %v", i)
    54  			}
    55  			ids = append(ids, i)
    56  		}
    57  
    58  		// TODO: re-creating miner is a bit ugly
    59  		s.miner = miner.New(s, s.chainConfig, s.EventMux(), ethash.NewCL(ids))
    60  		go s.miner.Start(eb, len(ids))
    61  		return nil
    62  	}
    63  
    64  	// CPU mining
    65  	go s.miner.Start(eb, threads)
    66  	return nil
    67  }
    68  
    69  func GPUBench(gpuid uint64) {
    70  	e := ethash.NewCL([]int{int(gpuid)})
    71  
    72  	var h common.Hash
    73  	bogoHeader := &types.Header{
    74  		ParentHash: h,
    75  		Number:     big.NewInt(int64(42)),
    76  		Difficulty: big.NewInt(int64(999999999999999)),
    77  	}
    78  	bogoBlock := types.NewBlock(bogoHeader, nil, nil, nil)
    79  
    80  	err := ethash.InitCL(bogoBlock.NumberU64(), e)
    81  	if err != nil {
    82  		fmt.Println("OpenCL init error: ", err)
    83  		return
    84  	}
    85  
    86  	stopChan := make(chan struct{})
    87  	reportHashRate := func() {
    88  		for {
    89  			time.Sleep(3 * time.Second)
    90  			fmt.Printf("hashes/s : %v\n", e.GetHashrate())
    91  		}
    92  	}
    93  	fmt.Printf("Starting benchmark (%v seconds)\n", 60)
    94  	go reportHashRate()
    95  	go e.Search(bogoBlock, stopChan, 0)
    96  	time.Sleep(60 * time.Second)
    97  	fmt.Println("OK.")
    98  }
    99  
   100  func PrintOpenCLDevices() {
   101  	ethash.PrintDevices()
   102  }