diff --git a/Common/OpenCLHandler.cpp b/Common/OpenCLHandler.cpp
index 7964f2e..398ddba 100644
--- a/Common/OpenCLHandler.cpp
+++ b/Common/OpenCLHandler.cpp
@@ -7,22 +7,31 @@ void OpenCLHandler::printTimeStats(cl::Event& event)
 	cl_int err = CL_SUCCESS;
 	event.wait();
 	cl_ulong execStart, execEnd;
+	bool success = true;
 	execStart = event.getProfilingInfo<CL_PROFILING_COMMAND_START>(&err);
 	if (err != CL_SUCCESS)
 	{
-		std::cerr << "Error during profile query: CL_PROFILING_COMMAND_START ["
-			<< err << "]." << std::endl;
+		//std::cerr << "Error during profile query: CL_PROFILING_COMMAND_START ["
+			//<< err << "]." << std::endl;
+		success = false;
 	}
 	execEnd = event.getProfilingInfo<CL_PROFILING_COMMAND_END>(&err);
 	if (err != CL_SUCCESS)
 	{
-		std::cerr << "Error during profile query: CL_PROFILING_COMMAND_END ["
-			<< err << "]." << std::endl;
+		//std::cerr << "Error during profile query: CL_PROFILING_COMMAND_END ["
+			//<< err << "]." << std::endl;
+		success = false;
 	}
 	//std::cout << "[start] " << execStart << " [end] " << execEnd
 	// << " [time] " << (execEnd - execStart) / 1e+06 << "ms." << std::endl;
-	std::cout << "GPU [time] " << (execEnd - execStart) / 1e+06 << " ms" <<
-		std::endl;
+	if (success){
+		std::cout << "GPU [time] " << (execEnd - execStart) / 1e+06 << " ms" <<
+			std::endl;
+	}
+	else {
+		std::cout << "GPU [time] Unavailable" << std::endl;
+	}
+	
 }
 
 OpenCLHandler::OpenCLHandler(std::string kernelcode)
diff --git a/Linear/Jacobi.cpp b/Linear/Jacobi.cpp
index 7864d2e..15f4edf 100644
--- a/Linear/Jacobi.cpp
+++ b/Linear/Jacobi.cpp
@@ -74,9 +74,10 @@ MatrixVectorMultiplier* Jacobi::MethodFactory(MVType type, cl::Context* context,
 	}
 }
 
-Jacobi::Jacobi(MVType _type)
+Jacobi::Jacobi(int n, MVType _type)
 {
 	type = _type;
+	Jn = n;
 	generateLinEq();
 }
 
@@ -88,22 +89,22 @@ void Jacobi::gpu_compute(cl::Context* context, cl::CommandQueue* queue, cl::Prog
 {
 	MatrixVectorMultiplier* MVMultiplier = MethodFactory(type, context, queue, program);
 
-
+	cl_ulong time = 0;
 
 	if (MVMultiplier != NULL) {
 		int inputBuffer = 0;
 		const int iterations = 20;
 		for (int i = 0; i < iterations; ++i) {
-			MVMultiplier->dewIt(Jn, Jn, Jx_g[(inputBuffer + 1) % 2], JA_g, Jx_g[inputBuffer], Jb_g);
-			printMatrix(1, Jn, Jx_g[inputBuffer]);
+			time += MVMultiplier->dewIt(Jn, Jn, Jx_g[(inputBuffer + 1) % 2], JA_g, Jx_g[inputBuffer], Jb_g);
 			inputBuffer = (inputBuffer + 1) % 2;
+			//printMatrix(1, Jn, Jx_g[inputBuffer]);
 		}
 	}
 	else {
 		std::cout << "Invalid factory parameter" << std::endl;
 		exit(-1);
 	}
-	
+	std::cout << "Jacobi>" << MVMultiplier->getName() << "@" << Jn  << ": " << time / 1e+06 << " ms" << std::endl;
 	
 }
 
diff --git a/Linear/Large.cpp b/Linear/Large.cpp
index b9ad746..c3e9709 100644
--- a/Linear/Large.cpp
+++ b/Linear/Large.cpp
@@ -6,9 +6,10 @@ Large::Large(cl::Context* _context, cl::CommandQueue* _queue, cl::Program* _prog
 	context = _context;
 	queue = _queue;
 	program = _program;
+	name = "Large";
 }
 
-void Large::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
+cl_ulong Large::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
 {
 	cl_int err = CL_SUCCESS;
 	cl::Event _event;
@@ -49,6 +50,10 @@ void Large::dewIt(int n, int m, float* y, const float* A, const float* x, const
 
 	queue->enqueueNDRangeKernel(kernel, cl::NullRange, cl::NDRange(Z*T, 1), cl::NDRange(T * Z, 1), NULL, &_event);
 	_event.wait();
+	cl_ulong execStart, execEnd;
+	execStart = _event.getProfilingInfo<CL_PROFILING_COMMAND_START>(&err);
+	execEnd = _event.getProfilingInfo<CL_PROFILING_COMMAND_END>(&err);
 
 	queue->enqueueReadBuffer(YBuffer, true, 0, sizeof(float) * n, y);
+	return (execEnd - execStart);
 }
diff --git a/Linear/Linear.cpp b/Linear/Linear.cpp
index 672bc9c..8a8d0d0 100644
--- a/Linear/Linear.cpp
+++ b/Linear/Linear.cpp
@@ -60,10 +60,15 @@ int main()
 	capi();
 	//cppapi();
 	OpenCLHandler handler("../kernels/linear.cl");
-	//Jacobi j(MVType::ReduceMV);
-	//Jacobi j(MVType::SimpleMV);
-	//Jacobi j(MVType::LargeMV);
-	//handler.run_test(&j);
+
+	handler.run_test(new Jacobi(64, MVType::SimpleMV));
+	//handler.run_test(new Jacobi(64, MVType::ReduceMV));
+	//handler.run_test(new Jacobi(64, MVType::LargeMV));
+
+	//for (int n = 256; n <= 1024; n = n * 2) {
+	//	handler.run_test(new Jacobi(n, MVType::SimpleMV));
+	//	handler.run_test(new Jacobi(n, MVType::LargeMV));
+	//}
 
 	int GAn = 4;
 	int GAm = 3;
@@ -77,10 +82,11 @@ int main()
 	float GB[] = { 2, -1,  0,  1, 0, 0,
 				   -1,  2, -1,  0, 1, 0,
 					0, -1,  2,  0, 0, 1 };
+	Gauss g1(GAn, GAm, GA);
+	Gauss g2(GBn, GBm, GB);
 
-	Gauss g(GBn, GBm, GB);
-
-	handler.run_test(&g);
+	//handler.run_test(&g1);
+	//handler.run_test(&g2);
     return 0;
 }
 
diff --git a/Linear/LinearTests.h b/Linear/LinearTests.h
index 43759bc..ad95eb4 100644
--- a/Linear/LinearTests.h
+++ b/Linear/LinearTests.h
@@ -12,13 +12,17 @@ protected:
 	cl::Context* context;
 	cl::CommandQueue* queue;
 	cl::Program* program;
+	std::string name;
 public:
-	virtual void dewIt(int n, int m, float* y, const float* A, const float* x, const float* b) = 0;
+	virtual cl_ulong dewIt(int n, int m, float* y, const float* A, const float* x, const float* b) = 0;
+	std::string getName() {
+		return name;
+	}
 };
 
 class Jacobi : public TestCase {
 private:
-	const int Jn = 8;
+	int Jn;
 	// CPU
 	float* Jx_c[2] = { NULL, NULL };
 	float* JA_c = NULL;
@@ -35,7 +39,7 @@ private:
 	void printMatrix(int n, int m, float* A);
 	MatrixVectorMultiplier* MethodFactory(MVType type, cl::Context* context, cl::CommandQueue* queue, cl::Program* program);
 public:
-	Jacobi(MVType type);
+	Jacobi(int n, MVType type);
 	void collect_results(cl::CommandQueue* queue);
 	void gpu_compute(cl::Context* context, cl::CommandQueue* queue, cl::Program* program, cl::Event* Event);
 	void cpu_compute();
@@ -61,17 +65,17 @@ public:
 class Simple : public MatrixVectorMultiplier {
 public:
 	Simple(cl::Context* context, cl::CommandQueue* queue, cl::Program* program);
-	void dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
+	cl_ulong dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
 };
 
 class Reduce : public MatrixVectorMultiplier {
 public:
 	Reduce(cl::Context* context, cl::CommandQueue* queue, cl::Program* program);
-	void dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
+	cl_ulong dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
 };
 
 class Large : public MatrixVectorMultiplier {
 public:
 	Large(cl::Context* context, cl::CommandQueue* queue, cl::Program* program);
-	void dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
+	cl_ulong dewIt(int n, int m, float* y, const float* A, const float* x, const float* b);
 };
\ No newline at end of file
diff --git a/Linear/Reduce.cpp b/Linear/Reduce.cpp
index 3d9a014..8029920 100644
--- a/Linear/Reduce.cpp
+++ b/Linear/Reduce.cpp
@@ -6,9 +6,10 @@ Reduce::Reduce(cl::Context* _context, cl::CommandQueue* _queue, cl::Program* _pr
 	context = _context;
 	queue = _queue;
 	program = _program;
+	name = "Reduce";
 }
 
-void Reduce::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
+cl_ulong Reduce::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
 {
 	cl_int err = CL_SUCCESS;
 	cl::Event _event;
@@ -51,6 +52,10 @@ void Reduce::dewIt(int n, int m, float* y, const float* A, const float* x, const
 		NULL,						// 
 		&_event);
 	_event.wait();
+	cl_ulong execStart, execEnd;
+	execStart = _event.getProfilingInfo<CL_PROFILING_COMMAND_START>(&err);
+	execEnd = _event.getProfilingInfo<CL_PROFILING_COMMAND_END>(&err);
 
 	queue->enqueueReadBuffer(YBuffer, true, 0, sizeof(float) * n, y);
+	return (execEnd - execStart);
 }
\ No newline at end of file
diff --git a/Linear/Simple.cpp b/Linear/Simple.cpp
index 899d139..5633f67 100644
--- a/Linear/Simple.cpp
+++ b/Linear/Simple.cpp
@@ -6,12 +6,14 @@ Simple::Simple(cl::Context* _context, cl::CommandQueue* _queue, cl::Program* _pr
 	context = _context;
 	queue = _queue;
 	program = _program;
+	name = "Simple";
 }
 
-void Simple::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
+cl_ulong Simple::dewIt(int n, int m, float* y, const float* A, const float* x, const float* b)
 {
 	cl_int err = CL_SUCCESS;
 	cl::Event _event;
+	
 
 	cl::Kernel kernel = cl::Kernel(*program, "simpleMV", &err);
 	CheckCLError(err);
@@ -46,6 +48,10 @@ void Simple::dewIt(int n, int m, float* y, const float* A, const float* x, const
 		NULL,						// 
 		&_event);
 	_event.wait();
+	cl_ulong execStart, execEnd;
+	execStart = _event.getProfilingInfo<CL_PROFILING_COMMAND_START>(&err);
+	execEnd = _event.getProfilingInfo<CL_PROFILING_COMMAND_END>(&err);
 
 	queue->enqueueReadBuffer(YBuffer, true, 0, sizeof(float) * n, y);
+	return (execEnd - execStart);
 }