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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// +build opencl
package eth
import (
"fmt"
"math/big"
"strconv"
"strings"
"time"
"github.com/ethereum/ethash"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/logger/glog"
"github.com/ethereum/go-ethereum/miner"
)
func (s *Ethereum) StartMining(threads int, gpus string) error {
eb, err := s.Etherbase()
if err != nil {
err = fmt.Errorf("Cannot start mining without etherbase address: %v", err)
glog.V(logger.Error).Infoln(err)
return err
}
// GPU mining
if gpus != "" {
var ids []int
for _, s := range strings.Split(gpus, ",") {
i, err := strconv.Atoi(s)
if err != nil {
return fmt.Errorf("Invalid GPU id(s): %v", err)
}
if i < 0 {
return fmt.Errorf("Invalid GPU id: %v", i)
}
ids = append(ids, i)
}
// TODO: re-creating miner is a bit ugly
cl := ethash.NewCL(ids)
s.miner = miner.New(s, s.EventMux(), cl)
go s.miner.Start(eb, len(ids))
return nil
}
// CPU mining
go s.miner.Start(eb, threads)
return nil
}
func GPUBench(gpuid uint64) {
e := ethash.NewCL([]int{int(gpuid)})
var h common.Hash
bogoHeader := &types.Header{
ParentHash: h,
Number: big.NewInt(int64(42)),
Difficulty: big.NewInt(int64(999999999999999)),
}
bogoBlock := types.NewBlock(bogoHeader, nil, nil, nil)
err := ethash.InitCL(bogoBlock.NumberU64(), e)
if err != nil {
fmt.Println("OpenCL init error: ", err)
return
}
stopChan := make(chan struct{})
reportHashRate := func() {
for {
time.Sleep(3 * time.Second)
fmt.Printf("hashes/s : %v\n", e.GetHashrate())
}
}
fmt.Printf("Starting benchmark (%v seconds)\n", 60)
go reportHashRate()
go e.Search(bogoBlock, stopChan, 0)
time.Sleep(60 * time.Second)
fmt.Println("OK.")
}
func PrintOpenCLDevices() {
ethash.PrintDevices()
}
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