Version 0.2.3

GpuMiner/Core/MinerManager.cpp

@@ -162,7 +162,7 @@ bool MinerManager::InterpretOption(int& i, int argc, char** argv)
     }
     else if(arg == "-opencl-cpu")
     {
-        _useOpenCpu = true;
+        _useOpenClCpu = true;
     }
     else if(arg == "-nvidia-fix")
     {
@@ -181,7 +181,7 @@ void MinerManager::Execute()
     {
         if((_minerType & MinerType::CL) == MinerType::CL)
         {
-            CLMiner::ListDevices(_useOpenCpu);
+            CLMiner::ListDevices(_useOpenClCpu);
         }
         if((_minerType & MinerType::CPU) == MinerType::CPU)
         {
@@ -391,7 +391,7 @@ void MinerManager::ConfigureGpu()
         _localWorkSize,
         _globalWorkSizeMultiplier,
         _openclPlatform,
-        _useOpenCpu))
+        _useOpenClCpu))
     {
         exit(1);
     }

GpuMiner/Core/MinerManager.h

@@ -70,7 +70,7 @@ class MinerManager
     unsigned _openclSelectedKernel = 0;  ///< A numeric value for the selected OpenCL kernel
     unsigned _openclDeviceCount = 0;
     unsigned _openclDevices[MAX_CL_DEVICES];
-    bool _useOpenCpu = false;
+    bool _useOpenClCpu = false;
     unsigned _globalWorkSizeMultiplier = CLMiner::_defaultGlobalWorkSizeMultiplier;
     unsigned _localWorkSize = CLMiner::_defaultLocalWorkSize;
     bool _useNvidiaFix = false;

GpuMiner/MinerEngine/CLMiner.cpp

@@ -551,7 +551,7 @@ void CLMiner::WorkLoop()
             bool hasSolution = false;
             if(loopCounter > 0)
             {
-                // Read results.                
+                // Read results.
                 ReadData(results);
 
                 //miner return an array with 17 64-bit values. If nonce for hash lower than target hash is found - it is written to array. 

GpuMiner/version.h

@@ -3,7 +3,7 @@
 
 #define VERSION_MAJOR               0
 #define VERSION_MINOR               2
-#define VERSION_REVISION            2
+#define VERSION_REVISION            3
 
 #define VER_FILE_DESCRIPTION_STR    "Standalone GPU/CPU miner for Dagger coin"
 #define VER_FILE_VERSION            VERSION_MAJOR, VERSION_MINOR, VERSION_REVISION

README.md

@@ -26,14 +26,16 @@ Linux:
 AMD driver / SDK link https://developer.amd.com/amd-accelerated-parallel-processing-app-sdk/  
 Nvidia driver / SDK link https://developer.nvidia.com/cuda-downloads
 
-Check dependencies:libboost-dev, libboost-system-dev, openssl
+Check dependencies: libboost-dev, libboost-system-dev, openssl.  
 
-Download this source code, then cd to source folder.
-In GpuMiner folder run command $make all, it will generate xdag-gpu
+Download this source code, then cd to source folder. In GpuMiner folder run command $make all, it will generate xdag-gpu.  
 Launch parameters:
 1) GPU benchmark: ./xdag-gpu -G -M
 2) GPU mining: ./xdag-gpu -G -a <WALLET_ADDRESS> -p <POOL_ADDRESS>
 3) CPU mining: ./xdag-gpu -cpu -a <WALLET_ADDRESS> -p <POOL_ADDRESS> -t 8
 
+Workaround on issue with high CPU usage with NVIDIA GPUs.  
+There is an issue with NVIDIA GPUs leading to very high CPU usage. The reason is improper implementation of OpenCL by NVIDIA. When CPU thread waits for results from GPU, it does not stop, it spins in loop eating CPU resources for nothing.  
+There was impemented a workaround on this issue: before reading results from GPU current thread sleeps during small calculated time. CPU usage was decreased in 90%. The change made optional, use launch parameter "-nvidia-fix" to enable it. The change can decrease hashrate a bit in some cases. But GPU rigs should gain increase of hashrate. So try it and choose to use or not to use it.
 
 You can support author: XDAG  gKNRtSL1pUaTpzMuPMznKw49ILtP6qX3

version_history.txt

@@ -1,3 +1,6 @@
+0.2.3
+- workaround on issue with high cpu usage with NVIDIA cards is implemented. By default workaround is disabled, use "-nvidia-fix" parameter to enable it. The change can decrease hashrate a bit.
+
 0.2.2
 - a number of optimizations. Performance of mining was increased. Increase for AMD GPUs is about 20%, for NVIDIA GPU increase is low.