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#include "utests/utest_helper.hpp"
#include <sys/time.h>
double benchmark_use_host_ptr_buffer(void)
{
struct timeval start,stop;
const size_t n = 4096*4096;
// Setup kernel and buffers
OCL_CREATE_KERNEL("runtime_use_host_ptr_buffer");
int ret = posix_memalign(&buf_data[0], 64, sizeof(uint32_t) * n);
OCL_ASSERT(ret == 0);
for (uint32_t i = 0; i < n; ++i) ((uint32_t*)buf_data[0])[i] = i;
OCL_CREATE_BUFFER(buf[0], CL_MEM_USE_HOST_PTR, n * sizeof(uint32_t), buf_data[0]);
OCL_SET_ARG(0, sizeof(cl_mem), &buf[0]);
globals[0] = n;
locals[0] = 256;
gettimeofday(&start,0);
for (size_t i=0; i<100; i++) {
OCL_NDRANGE(1);
void* mapptr = (int*)clEnqueueMapBuffer(queue, buf[0], CL_TRUE, CL_MAP_READ, 0, n*sizeof(uint32_t), 0, NULL, NULL, NULL);
clEnqueueUnmapMemObject(queue, buf[0], mapptr, 0, NULL, NULL);
}
gettimeofday(&stop,0);
clReleaseMemObject(buf[0]);
free(buf_data[0]);
buf_data[0] = NULL;
double elapsed = time_subtract(&stop, &start, 0);
return BANDWIDTH(n*sizeof(uint32_t)*100*2, elapsed);
}
MAKE_BENCHMARK_FROM_FUNCTION(benchmark_use_host_ptr_buffer);
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