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 (s *Expanse) 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
s.miner = miner.New(s, s.chainConfig, s.EventMux(), ethash.NewCL(ids))
go s.miner.Start(eb, len(ids))
return nil
}
// CPU mining
go s.miner.Start(eb, threads)
return nil
}