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cmd, consensus/ethash, eth: miner push notifications

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This commit is contained in:
Péter Szilágyi 2018-08-08 12:15:08 +03:00
parent 00e6da9704
commit f0998415ba
No known key found for this signature in database
GPG Key ID: E9AE538CEDF8293D
12 changed files with 226 additions and 73 deletions
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3
cmd/geth/main.go
View File

@ -98,8 +98,9 @@ var (
utils.MaxPendingPeersFlag,
utils.EtherbaseFlag,
utils.GasPriceFlag,
utils.MinerThreadsFlag,
utils.MiningEnabledFlag,
utils.MinerThreadsFlag,
utils.MinerNotifyFlag,
utils.TargetGasLimitFlag,
utils.NATFlag,
utils.NoDiscoverFlag,

1
cmd/geth/usage.go
View File

@ -185,6 +185,7 @@ var AppHelpFlagGroups = []flagGroup{
Flags: []cli.Flag{
utils.MiningEnabledFlag,
utils.MinerThreadsFlag,
utils.MinerNotifyFlag,
utils.EtherbaseFlag,
utils.TargetGasLimitFlag,
utils.GasPriceFlag,

14
cmd/utils/flags.go
View File

@ -24,7 +24,6 @@ import (
"math/big"
"os"
"path/filepath"
"runtime"
"strconv"
"strings"
"time"
@ -318,9 +317,13 @@ var (
Usage: "Enable mining",
}
MinerThreadsFlag = cli.IntFlag{
Name: "minerthreads",
Name: "miner.threads",
Usage: "Number of CPU threads to use for mining",
Value: runtime.NumCPU(),
Value: 0,
}
MinerNotifyFlag = cli.StringFlag{
Name: "miner.notify",
Usage: "Comma separated HTTP URL list to notify of new work packages",
}
TargetGasLimitFlag = cli.Uint64Flag{
Name: "targetgaslimit",
@ -1093,6 +1096,9 @@ func SetEthConfig(ctx *cli.Context, stack *node.Node, cfg *eth.Config) {
if ctx.GlobalIsSet(MinerThreadsFlag.Name) {
cfg.MinerThreads = ctx.GlobalInt(MinerThreadsFlag.Name)
}
if ctx.GlobalIsSet(MinerNotifyFlag.Name) {
cfg.MinerNotify = strings.Split(ctx.GlobalString(MinerNotifyFlag.Name), ",")
}
if ctx.GlobalIsSet(DocRootFlag.Name) {
cfg.DocRoot = ctx.GlobalString(DocRootFlag.Name)
}
@ -1293,7 +1299,7 @@ func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chai
DatasetDir: stack.ResolvePath(eth.DefaultConfig.Ethash.DatasetDir),
DatasetsInMem: eth.DefaultConfig.Ethash.DatasetsInMem,
DatasetsOnDisk: eth.DefaultConfig.Ethash.DatasetsOnDisk,
})
}, nil)
}
}
if gcmode := ctx.GlobalString(GCModeFlag.Name); gcmode != "full" && gcmode != "archive" {

2
consensus/ethash/algorithm_test.go
View File

@ -729,7 +729,7 @@ func TestConcurrentDiskCacheGeneration(t *testing.T) {
go func(idx int) {
defer pend.Done()
ethash := New(Config{cachedir, 0, 1, "", 0, 0, ModeNormal})
ethash := New(Config{cachedir, 0, 1, "", 0, 0, ModeNormal}, nil)
defer ethash.Close()
if err := ethash.VerifySeal(nil, block.Header()); err != nil {
t.Errorf("proc %d: block verification failed: %v", idx, err)

2
consensus/ethash/consensus.go
View File

@ -493,7 +493,7 @@ func (ethash *Ethash) VerifySeal(chain consensus.ChainReader, header *types.Head
if !bytes.Equal(header.MixDigest[:], digest) {
return errInvalidMixDigest
}
target := new(big.Int).Div(maxUint256, header.Difficulty)
target := new(big.Int).Div(two256, header.Difficulty)
if new(big.Int).SetBytes(result).Cmp(target) > 0 {
return errInvalidPoW
}

18
consensus/ethash/ethash.go
View File

@ -45,11 +45,11 @@ import (
var ErrInvalidDumpMagic = errors.New("invalid dump magic")
var (
// maxUint256 is a big integer representing 2^256-1
maxUint256 = new(big.Int).Exp(big.NewInt(2), big.NewInt(256), big.NewInt(0))
// two256 is a big integer representing 2^256
two256 = new(big.Int).Exp(big.NewInt(2), big.NewInt(256), big.NewInt(0))
// sharedEthash is a full instance that can be shared between multiple users.
sharedEthash = New(Config{"", 3, 0, "", 1, 0, ModeNormal})
sharedEthash = New(Config{"", 3, 0, "", 1, 0, ModeNormal}, nil)
// algorithmRevision is the data structure version used for file naming.
algorithmRevision = 23
@ -447,8 +447,10 @@ type Ethash struct {
exitCh chan chan error // Notification channel to exiting backend threads
}
// New creates a full sized ethash PoW scheme and starts a background thread for remote mining.
func New(config Config) *Ethash {
// New creates a full sized ethash PoW scheme and starts a background thread for
// remote mining, also optionally notifying a batch of remote services of new work
// packages.
func New(config Config, notify []string) *Ethash {
if config.CachesInMem <= 0 {
log.Warn("One ethash cache must always be in memory", "requested", config.CachesInMem)
config.CachesInMem = 1
@ -473,13 +475,13 @@ func New(config Config) *Ethash {
submitRateCh: make(chan *hashrate),
exitCh: make(chan chan error),
}
go ethash.remote()
go ethash.remote(notify)
return ethash
}
// NewTester creates a small sized ethash PoW scheme useful only for testing
// purposes.
func NewTester() *Ethash {
func NewTester(notify []string) *Ethash {
ethash := &Ethash{
config: Config{PowMode: ModeTest},
caches: newlru("cache", 1, newCache),
@ -494,7 +496,7 @@ func NewTester() *Ethash {
submitRateCh: make(chan *hashrate),
exitCh: make(chan chan error),
}
go ethash.remote()
go ethash.remote(notify)
return ethash
}

43
consensus/ethash/ethash_test.go
View File

@ -32,17 +32,18 @@ import (
// Tests that ethash works correctly in test mode.
func TestTestMode(t *testing.T) {
head := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
ethash := NewTester()
ethash := NewTester(nil)
defer ethash.Close()
block, err := ethash.Seal(nil, types.NewBlockWithHeader(head), nil)
block, err := ethash.Seal(nil, types.NewBlockWithHeader(header), nil)
if err != nil {
t.Fatalf("failed to seal block: %v", err)
}
head.Nonce = types.EncodeNonce(block.Nonce())
head.MixDigest = block.MixDigest()
if err := ethash.VerifySeal(nil, head); err != nil {
header.Nonce = types.EncodeNonce(block.Nonce())
header.MixDigest = block.MixDigest()
if err := ethash.VerifySeal(nil, header); err != nil {
t.Fatalf("unexpected verification error: %v", err)
}
}
@ -55,7 +56,7 @@ func TestCacheFileEvict(t *testing.T) {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
e := New(Config{CachesInMem: 3, CachesOnDisk: 10, CacheDir: tmpdir, PowMode: ModeTest})
e := New(Config{CachesInMem: 3, CachesOnDisk: 10, CacheDir: tmpdir, PowMode: ModeTest}, nil)
defer e.Close()
workers := 8
@ -78,21 +79,21 @@ func verifyTest(wg *sync.WaitGroup, e *Ethash, workerIndex, epochs int) {
if block < 0 {
block = 0
}
head := &types.Header{Number: big.NewInt(block), Difficulty: big.NewInt(100)}
e.VerifySeal(nil, head)
header := &types.Header{Number: big.NewInt(block), Difficulty: big.NewInt(100)}
e.VerifySeal(nil, header)
}
}
func TestRemoteSealer(t *testing.T) {
ethash := NewTester()
ethash := NewTester(nil)
defer ethash.Close()
api := &API{ethash}
if _, err := api.GetWork(); err != errNoMiningWork {
t.Error("expect to return an error indicate there is no mining work")
}
head := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
block := types.NewBlockWithHeader(head)
header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
block := types.NewBlockWithHeader(header)
// Push new work.
ethash.Seal(nil, block, nil)
@ -108,16 +109,14 @@ func TestRemoteSealer(t *testing.T) {
if res := api.SubmitWork(types.BlockNonce{}, block.HashNoNonce(), common.Hash{}); res {
t.Error("expect to return false when submit a fake solution")
}
// Push new block with same block number to replace the original one.
head = &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(1000)}
block = types.NewBlockWithHeader(head)
header = &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(1000)}
block = types.NewBlockWithHeader(header)
ethash.Seal(nil, block, nil)
if work, err = api.GetWork(); err != nil || work[0] != block.HashNoNonce().Hex() {
t.Error("expect to return the latest pushed work")
}
// Push block with higher block number.
newHead := &types.Header{Number: big.NewInt(2), Difficulty: big.NewInt(100)}
newBlock := types.NewBlockWithHeader(newHead)
@ -130,19 +129,18 @@ func TestRemoteSealer(t *testing.T) {
func TestHashRate(t *testing.T) {
var (
ethash = NewTester()
api = &API{ethash}
hashrate = []hexutil.Uint64{100, 200, 300}
expect uint64
ids = []common.Hash{common.HexToHash("a"), common.HexToHash("b"), common.HexToHash("c")}
)
ethash := NewTester(nil)
defer ethash.Close()
if tot := ethash.Hashrate(); tot != 0 {
t.Error("expect the result should be zero")
}
api := &API{ethash}
for i := 0; i < len(hashrate); i += 1 {
if res := api.SubmitHashRate(hashrate[i], ids[i]); !res {
t.Error("remote miner submit hashrate failed")
@ -155,9 +153,8 @@ func TestHashRate(t *testing.T) {
}
func TestClosedRemoteSealer(t *testing.T) {
ethash := NewTester()
// Make sure exit channel has been listened
time.Sleep(1 * time.Second)
ethash := NewTester(nil)
time.Sleep(1 * time.Second) // ensure exit channel is listening
ethash.Close()
api := &API{ethash}

86
consensus/ethash/sealer.go
View File

@ -17,11 +17,14 @@
package ethash
import (
"bytes"
crand "crypto/rand"
"encoding/json"
"errors"
"math"
"math/big"
"math/rand"
"net/http"
"runtime"
"sync"
"time"
@ -109,7 +112,7 @@ func (ethash *Ethash) mine(block *types.Block, id int, seed uint64, abort chan s
var (
header = block.Header()
hash = header.HashNoNonce().Bytes()
target = new(big.Int).Div(maxUint256, header.Difficulty)
target = new(big.Int).Div(two256, header.Difficulty)
number = header.Number.Uint64()
dataset = ethash.dataset(number)
)
@ -161,40 +164,65 @@ search:
runtime.KeepAlive(dataset)
}
// remote starts a standalone goroutine to handle remote mining related stuff.
func (ethash *Ethash) remote() {
// remote is a standalone goroutine to handle remote mining related stuff.
func (ethash *Ethash) remote(notify []string) {
var (
works = make(map[common.Hash]*types.Block)
rates = make(map[common.Hash]hashrate)
currentWork *types.Block
)
// getWork returns a work package for external miner.
currentBlock *types.Block
currentWork [3]string
notifyTransport = &http.Transport{}
notifyClient = &http.Client{
Transport: notifyTransport,
Timeout: time.Second,
}
notifyReqs = make([]*http.Request, len(notify))
)
// notifyWork notifies all the specified mining endpoints of the availability of
// new work to be processed.
notifyWork := func() {
work := currentWork
blob, _ := json.Marshal(work)
for i, url := range notify {
// Terminate any previously pending request and create the new work
if notifyReqs[i] != nil {
notifyTransport.CancelRequest(notifyReqs[i])
}
notifyReqs[i], _ = http.NewRequest("POST", url, bytes.NewReader(blob))
notifyReqs[i].Header.Set("Content-Type", "application/json")
// Push the new work concurrently to all the remote nodes
go func(req *http.Request, url string) {
res, err := notifyClient.Do(req)
if err != nil {
log.Warn("Failed to notify remote miner", "err", err)
} else {
log.Trace("Notified remote miner", "miner", url, "hash", log.Lazy{Fn: func() common.Hash { return common.HexToHash(work[0]) }}, "target", work[2])
res.Body.Close()
}
}(notifyReqs[i], url)
}
}
// makeWork creates a work package for external miner.
//
// The work package consists of 3 strings:
// result[0], 32 bytes hex encoded current block header pow-hash
// result[1], 32 bytes hex encoded seed hash used for DAG
// result[2], 32 bytes hex encoded boundary condition ("target"), 2^256/difficulty
getWork := func() ([3]string, error) {
var res [3]string
if currentWork == nil {
return res, errNoMiningWork
}
res[0] = currentWork.HashNoNonce().Hex()
res[1] = common.BytesToHash(SeedHash(currentWork.NumberU64())).Hex()
makeWork := func(block *types.Block) {
hash := block.HashNoNonce()
// Calculate the "target" to be returned to the external sealer.
n := big.NewInt(1)
n.Lsh(n, 255)
n.Div(n, currentWork.Difficulty())
n.Lsh(n, 1)
res[2] = common.BytesToHash(n.Bytes()).Hex()
currentWork[0] = hash.Hex()
currentWork[1] = common.BytesToHash(SeedHash(block.NumberU64())).Hex()
currentWork[2] = common.BytesToHash(new(big.Int).Div(two256, block.Difficulty()).Bytes()).Hex()
// Trace the seal work fetched by remote sealer.
works[currentWork.HashNoNonce()] = currentWork
return res, nil
currentBlock = block
works[hash] = block
}
// submitWork verifies the submitted pow solution, returning
// whether the solution was accepted or not (not can be both a bad pow as well as
// any other error, like no pending work or stale mining result).
@ -238,21 +266,23 @@ func (ethash *Ethash) remote() {
for {
select {
case block := <-ethash.workCh:
if currentWork != nil && block.ParentHash() != currentWork.ParentHash() {
if currentBlock != nil && block.ParentHash() != currentBlock.ParentHash() {
// Start new round mining, throw out all previous work.
works = make(map[common.Hash]*types.Block)
}
// Update current work with new received block.
// Note same work can be past twice, happens when changing CPU threads.
currentWork = block
makeWork(block)
// Notify and requested URLs of the new work availability
notifyWork()
case work := <-ethash.fetchWorkCh:
// Return current mining work to remote miner.
miningWork, err := getWork()
if err != nil {
work.errc <- err
if currentBlock == nil {
work.errc <- errNoMiningWork
} else {
work.res <- miningWork
work.res <- currentWork
}
case result := <-ethash.submitWorkCh:

115
consensus/ethash/sealer_test.go Normal file
View File

@ -0,0 +1,115 @@
package ethash
import (
"encoding/json"
"io/ioutil"
"math/big"
"net"
"net/http"
"testing"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
// Tests whether remote HTTP servers are correctly notified of new work.
func TestRemoteNotify(t *testing.T) {
// Start a simple webserver to capture notifications
sink := make(chan [3]string)
server := &http.Server{
Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
blob, err := ioutil.ReadAll(req.Body)
if err != nil {
t.Fatalf("failed to read miner notification: %v", err)
}
var work [3]string
if err := json.Unmarshal(blob, &work); err != nil {
t.Fatalf("failed to unmarshal miner notification: %v", err)
}
sink <- work
}),
}
// Open a custom listener to extract its local address
listener, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("failed to open notification server: %v", err)
}
defer listener.Close()
go server.Serve(listener)
// Create the custom ethash engine
ethash := NewTester([]string{"http://" + listener.Addr().String()})
defer ethash.Close()
// Stream a work task and ensure the notification bubbles out
header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
block := types.NewBlockWithHeader(header)
ethash.Seal(nil, block, nil)
select {
case work := <-sink:
if want := header.HashNoNonce().Hex(); work[0] != want {
t.Errorf("work packet hash mismatch: have %s, want %s", work[0], want)
}
if want := common.BytesToHash(SeedHash(header.Number.Uint64())).Hex(); work[1] != want {
t.Errorf("work packet seed mismatch: have %s, want %s", work[1], want)
}
target := new(big.Int).Div(new(big.Int).Lsh(big.NewInt(1), 256), header.Difficulty)
if want := common.BytesToHash(target.Bytes()).Hex(); work[2] != want {
t.Errorf("work packet target mismatch: have %s, want %s", work[2], want)
}
case <-time.After(time.Second):
t.Fatalf("notification timed out")
}
}
// Tests that pushing work packages fast to the miner doesn't cause any daa race
// issues in the notifications.
func TestRemoteMultiNotify(t *testing.T) {
// Start a simple webserver to capture notifications
sink := make(chan [3]string, 1024)
server := &http.Server{
Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
blob, err := ioutil.ReadAll(req.Body)
if err != nil {
t.Fatalf("failed to read miner notification: %v", err)
}
var work [3]string
if err := json.Unmarshal(blob, &work); err != nil {
t.Fatalf("failed to unmarshal miner notification: %v", err)
}
sink <- work
}),
}
// Open a custom listener to extract its local address
listener, err := net.Listen("tcp", "localhost:0")
if err != nil {
t.Fatalf("failed to open notification server: %v", err)
}
defer listener.Close()
go server.Serve(listener)
// Create the custom ethash engine
ethash := NewTester([]string{"http://" + listener.Addr().String()})
defer ethash.Close()
// Stream a lot of work task and ensure all the notifications bubble out
for i := 0; i < cap(sink); i++ {
header := &types.Header{Number: big.NewInt(int64(i)), Difficulty: big.NewInt(100)}
block := types.NewBlockWithHeader(header)
ethash.Seal(nil, block, nil)
}
for i := 0; i < cap(sink); i++ {
select {
case <-sink:
case <-time.After(250 * time.Millisecond):
t.Fatalf("notification %d timed out", i)
}
}
}

8
eth/backend.go
View File

@ -124,7 +124,7 @@ func New(ctx *node.ServiceContext, config *Config) (*Ethereum, error) {
chainConfig: chainConfig,
eventMux: ctx.EventMux,
accountManager: ctx.AccountManager,
engine: CreateConsensusEngine(ctx, &config.Ethash, chainConfig, chainDb),
engine: CreateConsensusEngine(ctx, chainConfig, &config.Ethash, config.MinerNotify, chainDb),
shutdownChan: make(chan bool),
networkID: config.NetworkId,
gasPrice: config.GasPrice,
@ -210,7 +210,7 @@ func CreateDB(ctx *node.ServiceContext, config *Config, name string) (ethdb.Data
}
// CreateConsensusEngine creates the required type of consensus engine instance for an Ethereum service
func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chainConfig *params.ChainConfig, db ethdb.Database) consensus.Engine {
func CreateConsensusEngine(ctx *node.ServiceContext, chainConfig *params.ChainConfig, config *ethash.Config, notify []string, db ethdb.Database) consensus.Engine {
// If proof-of-authority is requested, set it up
if chainConfig.Clique != nil {
return clique.New(chainConfig.Clique, db)
@ -222,7 +222,7 @@ func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chai
return ethash.NewFaker()
case ethash.ModeTest:
log.Warn("Ethash used in test mode")
return ethash.NewTester()
return ethash.NewTester(nil)
case ethash.ModeShared:
log.Warn("Ethash used in shared mode")
return ethash.NewShared()
@ -234,7 +234,7 @@ func CreateConsensusEngine(ctx *node.ServiceContext, config *ethash.Config, chai
DatasetDir: config.DatasetDir,
DatasetsInMem: config.DatasetsInMem,
DatasetsOnDisk: config.DatasetsOnDisk,
})
}, notify)
engine.SetThreads(-1) // Disable CPU mining
return engine
}

1
eth/config.go
View File

@ -97,6 +97,7 @@ type Config struct {
// Mining-related options
Etherbase common.Address `toml:",omitempty"`
MinerThreads int `toml:",omitempty"`
MinerNotify []string `toml:",omitempty"`
ExtraData []byte `toml:",omitempty"`
GasPrice *big.Int

2
les/backend.go
View File

@ -102,7 +102,7 @@ func New(ctx *node.ServiceContext, config *eth.Config) (*LightEthereum, error) {
peers: peers,
reqDist: newRequestDistributor(peers, quitSync),
accountManager: ctx.AccountManager,
engine: eth.CreateConsensusEngine(ctx, &config.Ethash, chainConfig, chainDb),
engine: eth.CreateConsensusEngine(ctx, chainConfig, &config.Ethash, nil, chainDb),
shutdownChan: make(chan bool),
networkId: config.NetworkId,
bloomRequests: make(chan chan *bloombits.Retrieval),