added CLI flag to set number of mining threads

for eth and neth

eth/main.cpp

@@ -119,6 +119,7 @@ void help()
         << "    -p,--port <port>  Connect to remote port (default: 30303)." << endl
         << "    -r,--remote <host>  Connect to remote host (default: none)." << endl
         << "    -s,--secret <secretkeyhex>  Set the secret key for use with send command (default: auto)." << endl
+        << "    -t,--miners <number>  Number of mining threads to start (Default: " << thread::hardware_concurrency() << ")" << endl
         << "    -u,--public-ip <ip>  Force public ip to given (default; auto)." << endl
         << "    -v,--verbosity <0 - 9>  Set the log verbosity from 0 to 9 (Default: 8)." << endl
         << "    -x,--peers <number>  Attempt to connect to given number of peers (Default: 5)." << endl
@@ -195,6 +196,7 @@ int main(int argc, char** argv)
 	unsigned mining = ~(unsigned)0;
 	NodeMode mode = NodeMode::Full;
 	unsigned peers = 5;
+    int miners = -1;
 	bool interactive = false;
 #if ETH_JSONRPC
 	int jsonrpc = -1;
@@ -295,6 +297,8 @@ int main(int argc, char** argv)
 			g_logVerbosity = atoi(argv[++i]);
 		else if ((arg == "-x" || arg == "--peers") && i + 1 < argc)
 			peers = atoi(argv[++i]);
+        else if ((arg == "-t" || arg == "--miners") && i + 1 < argc)
+            miners = atoi(argv[++i]);
 		else if ((arg == "-o" || arg == "--mode") && i + 1 < argc)
 		{
 			string m = argv[++i];
@@ -337,7 +341,8 @@ int main(int argc, char** argv)
 		dbPath,
 		false,
 		mode == NodeMode::Full ? set<string>{"eth", "shh"} : set<string>(),
-		netPrefs
+		netPrefs,
+        miners
 		);
 	web3.setIdealPeerCount(peers);
 	eth::Client* c = mode == NodeMode::Full ? web3.ethereum() : nullptr;

libethereum/Client.cpp

@@ -59,7 +59,7 @@ void VersionChecker::setOk()
 	}
 }
 
-Client::Client(p2p::Host* _extNet, std::string const& _dbPath, bool _forceClean, u256 _networkId):
+Client::Client(p2p::Host* _extNet, std::string const& _dbPath, bool _forceClean, u256 _networkId, int miners):
 	Worker("eth"),
 	m_vc(_dbPath),
 	m_bc(_dbPath, !m_vc.ok() || _forceClean),
@@ -69,7 +69,10 @@ Client::Client(p2p::Host* _extNet, std::string const& _dbPath, bool _forceClean,
 {
 	m_host = _extNet->registerCapability(new EthereumHost(m_bc, m_tq, m_bq, _networkId));
 
-	setMiningThreads();
+    if(miners > -1)
+        setMiningThreads(miners);
+    else
+        setMiningThreads();
 	if (_dbPath.size())
 		Defaults::setDBPath(_dbPath);
 	m_vc.setOk();

libethereum/Client.h

@@ -166,7 +166,7 @@ class Client: public MinerHost, public Interface, Worker
 
 public:
 	/// New-style Constructor.
-	explicit Client(p2p::Host* _host, std::string const& _dbPath = std::string(), bool _forceClean = false, u256 _networkId = 0);
+	explicit Client(p2p::Host* _host, std::string const& _dbPath = std::string(), bool _forceClean = false, u256 _networkId = 0, int miners = -1);
 
 	/// Destructor.
 	virtual ~Client();

libwebthree/WebThree.cpp

@@ -35,15 +35,15 @@ using namespace dev::p2p;
 using namespace dev::eth;
 using namespace dev::shh;
 
-WebThreeDirect::WebThreeDirect(std::string const& _clientVersion, std::string const& _dbPath, bool _forceClean, std::set<std::string> const& _interfaces, NetworkPreferences const& _n):
+WebThreeDirect::WebThreeDirect(std::string const& _clientVersion, std::string const& _dbPath, bool _forceClean, std::set<std::string> const& _interfaces, NetworkPreferences const& _n, int miners):
 	m_clientVersion(_clientVersion),
 	m_net(_clientVersion, _n)
 {
 	if (_dbPath.size())
 		Defaults::setDBPath(_dbPath);
-
-	if (_interfaces.count("eth"))
-		m_ethereum.reset(new eth::Client(&m_net, _dbPath, _forceClean));
+    if (_interfaces.count("eth"))
+        m_ethereum.reset(new eth::Client(&m_net, _dbPath, _forceClean, 0, miners));
+		
 
 	if (_interfaces.count("shh"))
 		m_whisper = m_net.registerCapability<WhisperHost>(new WhisperHost);

libwebthree/WebThree.h

@@ -106,7 +106,7 @@ class WebThreeDirect : public WebThreeNetworkFace
 public:
 	/// Constructor for private instance. If there is already another process on the machine using @a _dbPath, then this will throw an exception.
 	/// ethereum() may be safely static_cast()ed to a eth::Client*.
-	WebThreeDirect(std::string const& _clientVersion, std::string const& _dbPath, bool _forceClean = false, std::set<std::string> const& _interfaces = {"eth", "shh"}, p2p::NetworkPreferences const& _n = p2p::NetworkPreferences());
+	WebThreeDirect(std::string const& _clientVersion, std::string const& _dbPath, bool _forceClean = false, std::set<std::string> const& _interfaces = {"eth", "shh"}, p2p::NetworkPreferences const& _n = p2p::NetworkPreferences(), int miners = -1);
 
 	/// Destructor.
 	~WebThreeDirect();

neth/main.cpp

@@ -81,6 +81,7 @@ void help()
 		<< "    -p,--port <port>  Connect to remote port (default: 30303)." << endl
 		<< "    -r,--remote <host>  Connect to remote host (default: none)." << endl
 		<< "    -s,--secret <secretkeyhex>  Set the secret key for use with send command (default: auto)." << endl
+        << "    -t,--miners <number>  Number of mining threads to start (Default: " << thread::hardware_concurrency() << ")" << endl
 		<< "    -u,--public-ip <ip>  Force public ip to given (default; auto)." << endl
 		<< "    -v,--verbosity <0..9>  Set the log verbosity from 0 to 9 (tmp forced to 1)." << endl
 		<< "    -x,--peers <number>  Attempt to connect to given number of peers (default: 5)." << endl
@@ -307,6 +308,7 @@ int main(int argc, char** argv)
 	unsigned mining = ~(unsigned)0;
 	NodeMode mode = NodeMode::Full;
 	unsigned peers = 5;
+    int miners = -1;
 #if ETH_JSONRPC
 	int jsonrpc = 8080;
 #endif
@@ -401,6 +403,8 @@ int main(int argc, char** argv)
 			g_logVerbosity = atoi(argv[++i]);
 		else if ((arg == "-x" || arg == "--peers") && i + 1 < argc)
 			peers = atoi(argv[++i]);
+        else if ((arg == "-t" || arg == "--miners") && i + 1 < argc)
+            miners = atoi(argv[++i]);
 		else if (arg == "-h" || arg == "--help")
 			help();
 		else if (arg == "-V" || arg == "--version")
@@ -420,7 +424,8 @@ int main(int argc, char** argv)
 		dbPath,
 		false,
 		mode == NodeMode::Full ? set<string>{"eth", "shh"} : set<string>(),
-		netPrefs
+		netPrefs,
+        miners
 		);
 	web3.setIdealPeerCount(peers);
 	eth::Client* c = mode == NodeMode::Full ? web3.ethereum() : nullptr;