add clSetKernelArgSVMPointer testing

Author: bashbaug

samples/11_apitimes/main.cpp

@@ -108,6 +108,45 @@ void test_clSetKernelArg(cl::Device& device)
     printf("finished in %f ms\n", ms);
 }
 
+void test_clSetKernelArgSVMPointer(cl::Device& device)
+{
+    const size_t iterations = 1024 * 1024;
+    printf("Testing %s (%zu): ", __FUNCTION__, iterations); fflush(stdout);
+
+    cl::Context context{device};
+
+    std::vector<void*>  ptrs;
+    ptrs.push_back(clSVMAlloc(context(), CL_MEM_READ_WRITE, 128, 0));
+    ptrs.push_back(clSVMAlloc(context(), CL_MEM_READ_WRITE, 128, 0));
+
+    static const char kernelString[] = R"CLC( kernel void Empty(global int* a) {} )CLC";
+
+    cl::Program program{context, kernelString};
+    program.build();
+    cl::Kernel kernel = cl::Kernel{program, "Empty"};
+
+    cl_kernel k = kernel();
+
+    auto start = std::chrono::system_clock::now();
+    for( int i = 0; i < iterations; i++ )
+    {
+        clSetKernelArgSVMPointer(
+            k,
+            0,
+            ptrs[i&1] );
+    }
+    auto end = std::chrono::system_clock::now();
+
+    std::chrono::duration<float> elapsed_seconds = end - start;
+    float ms = elapsed_seconds.count() * 1000;
+    printf("finished in %f ms\n", ms);
+
+    for (auto ptr : ptrs)
+    {
+        clSVMFree(context(), ptr);
+    }
+}
+
 int main(
     int argc,
     char** argv )
@@ -150,7 +189,8 @@ int main(
 
     //test_clGetDeviceIDs(platforms[platformIndex]);
     //test_clGetDeviceInfo(devices[deviceIndex]);
-    test_clSetKernelArg(devices[deviceIndex]);
+    //test_clSetKernelArg(devices[deviceIndex]);
+    test_clSetKernelArgSVMPointer(devices[deviceIndex]);
 
     return 0;
  }