added performance metrics for kernel dispatch

samples/1_Utils/hipDispatchLatency/Makefile

@@ -0,0 +1,15 @@
+HIP_PATH?=$(shell hipconfig -p)
+HIPCC=$(HIP_PATH)/bin/hipcc
+
+EXE=hipDispatchLatency
+
+all: install
+
+$(EXE): hipDispatchLatency.cpp
+	$(HIPCC) hipDispatchLatency.cpp -o $@
+
+install: $(EXE)
+	cp $(EXE) $(HIP_PATH)/bin
+
+clean:
+	rm -f *.o $(EXE)

samples/1_Utils/hipDispatchLatency/hipDispatchLatency.cpp

@@ -0,0 +1,120 @@
+/*
+Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#include"hip_runtime.h"
+#include<iostream>
+#include<time.h>
+
+#define check(msg, status) \
+if(status != hipSuccess){ \
+	printf("%s failed.\n",#msg); \
+	exit(1); \
+}
+
+#define LEN 1024*1024
+#define SIZE LEN * sizeof(float)
+#define ITER 10000
+
+__global__ void One(hipLaunchParm lp, float* Ad){
+}
+
+int main(){
+
+hipError_t err;
+float *A, *Ad;
+
+A = new float[LEN];
+
+for(int i=0;i<LEN;i++){
+	A[i] = 1.0f;
+}
+
+hipStream_t stream;
+err = hipStreamCreate(&stream);
+check("Creating stream",err);
+
+err = hipMalloc(&Ad, SIZE);
+check("Allocating Ad memory on device", err);
+
+err = hipMemcpy(Ad, A, SIZE, hipMemcpyHostToDevice);
+check("Doing memory copy from A to Ad", err);
+
+float mS = 0;
+hipEvent_t start, stop;
+hipEventCreate(&start);
+hipEventCreate(&stop);
+
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, 0, Ad);
+}
+hipDeviceSynchronize();
+hipEventRecord(stop);
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"NULL Stream Sync dispatch wait: \t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, 0, Ad);
+}
+hipEventRecord(stop);
+hipDeviceSynchronize();
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"NULL Stream Async dispatch wait: \t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, stream, Ad);
+hipDeviceSynchronize();
+}
+hipEventRecord(stop);
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"Stream Sync dispatch wait: \t\t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, stream, Ad);
+}
+hipDeviceSynchronize();
+hipEventRecord(stop);
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"Stream Async dispatch wait: \t\t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, 0, Ad);
+}
+hipEventRecord(stop);
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"NULL Stream Dispatch No Wait: \t\t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+
+hipEventRecord(start);
+for(int i=0;i<ITER;i++){
+hipLaunchKernel(HIP_KERNEL_NAME(One), dim3(LEN/512), dim3(512), 0, stream, Ad);
+}
+hipEventRecord(stop);
+hipEventElapsedTime(&mS, start, stop);
+std::cout<<"Stream Dispatch No Wait: \t\t"<<mS*1000/ITER<<" uS"<<std::endl;
+hipDeviceSynchronize();
+
+}