Merge pull request #2115 from LefterisJP/list_opencl_devices

Argument to list available opencl devices and platforms

ethminer/MinerAux.h

@@ -127,6 +127,11 @@ public:
 				cerr << "Bad " << arg << " option: " << argv[i] << endl;
 				throw BadArgument();
 			}
+		else if (arg == "--list-devices")
+		{
+			ProofOfWork::GPUMiner::listDevices();
+			exit(0);
+		}
 		else if (arg == "--use-chunks")
 		{
 			dagChunks = 4;
@@ -175,7 +180,7 @@ public:
 			m_minerType = MinerType::CPU;
 		else if (arg == "-G" || arg == "--opencl")
 		{
-			if (!ProofOfWork::GPUMiner::haveSufficientGPUMemory())
+			if (!ProofOfWork::GPUMiner::haveSufficientMemory())
 			{
 				cout << "No GPU device with sufficient memory was found. Defaulting to CPU" << endl;
 				m_minerType = MinerType::CPU;

libethash-cl/ethash_cl_miner.cpp

@@ -127,7 +127,7 @@ unsigned ethash_cl_miner::get_num_devices(unsigned _platformId)
 	return devices.size();
 }
 
-bool ethash_cl_miner::haveSufficientGPUMemory(unsigned _platformId)
+bool ethash_cl_miner::haveSufficientGPUMemory()
 {
 	std::vector<cl::Platform> platforms;
 	cl::Platform::get(&platforms);
@@ -136,15 +136,25 @@ bool ethash_cl_miner::haveSufficientGPUMemory(unsigned _platformId)
 		ETHCL_LOG("No OpenCL platforms found.");
 		return false;
 	}
+	for (unsigned i = 0; i < platforms.size(); ++i)
+		if (haveSufficientGPUMemory(i))
+			return true;
+
+	return false;
+}
+
+bool ethash_cl_miner::haveSufficientGPUMemory(unsigned _platformId)
+{
+	std::vector<cl::Platform> platforms;
+	cl::Platform::get(&platforms);
+	if (_platformId >= platforms.size())
+		return false;
 
 	std::vector<cl::Device> devices;
 	unsigned platform_num = std::min<unsigned>(_platformId, platforms.size() - 1);
 	platforms[platform_num].getDevices(CL_DEVICE_TYPE_ALL, &devices);
 	if (devices.empty())
-	{
-		ETHCL_LOG("No OpenCL devices found.");
 		return false;
-	}
 
 	for (cl::Device const& device: devices)
 	{
@@ -168,6 +178,39 @@ bool ethash_cl_miner::haveSufficientGPUMemory(unsigned _platformId)
 	return false;
 }
 
+void ethash_cl_miner::listDevices()
+{
+	std::vector<cl::Platform> platforms;
+	cl::Platform::get(&platforms);
+	if (platforms.empty())
+	{
+		ETHCL_LOG("No OpenCL platforms found.");
+		return;
+	}
+	for (unsigned i = 0; i < platforms.size(); ++i)
+		listDevices(i);
+}
+
+void ethash_cl_miner::listDevices(unsigned _platformId)
+{
+	std::vector<cl::Platform> platforms;
+	cl::Platform::get(&platforms);
+	if (_platformId >= platforms.size())
+		return;
+
+	std::string outString ="Listing OpenCL devices for platform "  + to_string(_platformId) + "\n[deviceID] deviceName\n";
+	std::vector<cl::Device> devices;
+	platforms[_platformId].getDevices(CL_DEVICE_TYPE_ALL, &devices);
+	unsigned i = 0;
+	std::string deviceString;
+	for (cl::Device const& device: devices)
+	{
+		outString += "[" + to_string(i) + "] " + device.getInfo<CL_DEVICE_NAME>() + "\n";
+		++i;
+	}
+	ETHCL_LOG(outString);
+}
+
 void ethash_cl_miner::finish()
 {
 	if (m_queue())

libethash-cl/ethash_cl_miner.h

@@ -35,7 +35,10 @@ public:
 	static unsigned get_num_platforms();
 	static unsigned get_num_devices(unsigned _platformId = 0);
 	static std::string platform_info(unsigned _platformId = 0, unsigned _deviceId = 0);
-	static bool haveSufficientGPUMemory(unsigned _platformId = 0);
+	static bool haveSufficientGPUMemory();
+	static bool haveSufficientGPUMemory(unsigned _platformId);
+	static void listDevices();
+	static void listDevices(unsigned _platformId);
 
 	bool init(
 		uint8_t const* _dag,

libethcore/Ethash.cpp

@@ -364,11 +364,6 @@ void Ethash::GPUMiner::pause()
 	stopWorking();
 }
 
-bool Ethash::GPUMiner::haveSufficientGPUMemory()
-{
-	return ethash_cl_miner::haveSufficientGPUMemory(s_platformId);
-}
-
 std::string Ethash::GPUMiner::platformInfo()
 {
 	return ethash_cl_miner::platform_info(s_platformId, s_deviceId);
@@ -379,6 +374,16 @@ unsigned Ethash::GPUMiner::getNumDevices()
 	return ethash_cl_miner::get_num_devices(s_platformId);
 }
 
+void Ethash::GPUMiner::listDevices()
+{
+	return ethash_cl_miner::listDevices();
+}
+
+bool Ethash::GPUMiner::haveSufficientMemory()
+{
+	return ethash_cl_miner::haveSufficientGPUMemory();
+}
+
 #endif
 
 }

libethcore/Ethash.h

@@ -87,10 +87,11 @@ public:
 
 		static unsigned instances() { return s_numInstances > 0 ? s_numInstances : std::thread::hardware_concurrency(); }
 		static std::string platformInfo();
-		static bool haveSufficientGPUMemory() { return false; }
 		static void setDefaultPlatform(unsigned) {}
 		static void setDagChunks(unsigned) {}
 		static void setDefaultDevice(unsigned) {}
+		static void listDevices() {}
+		static bool haveSufficientMemory() { return false; }
 		static void setNumInstances(unsigned _instances) { s_numInstances = std::min<unsigned>(_instances, std::thread::hardware_concurrency()); }
 	protected:
 		void kickOff() override
@@ -117,8 +118,9 @@ public:
 
 		static unsigned instances() { return s_numInstances > 0 ? s_numInstances : 1; }
 		static std::string platformInfo();
-		static bool haveSufficientGPUMemory();
 		static unsigned getNumDevices();
+		static void listDevices();
+		static bool haveSufficientMemory();
 		static void setDefaultPlatform(unsigned _id) { s_platformId = _id; }
 		static void setDefaultDevice(unsigned _id) { s_deviceId = _id; }
 		static void setNumInstances(unsigned _instances) { s_numInstances = std::min<unsigned>(_instances, getNumDevices()); }