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#include <string.h>
#include "utests/utest_helper.hpp"
#include <sys/time.h>
#define IMAGE_BPP 2
double benchmark_copy_image_to_buffer(void)
{
struct timeval start,stop;
const size_t w = 960 * 4;
const size_t h = 540 * 4;
const size_t sz = IMAGE_BPP * w * h;
cl_image_format format;
cl_image_desc desc;
memset(&desc, 0x0, sizeof(cl_image_desc));
memset(&format, 0x0, sizeof(cl_image_format));
// Setup image and buffer
buf_data[0] = (unsigned short*) malloc(sz);
for (uint32_t i = 0; i < w*h; ++i) {
((unsigned short*)buf_data[0])[i] = (rand() & 0xffff);
}
format.image_channel_order = CL_R;
format.image_channel_data_type = CL_UNSIGNED_INT16;
desc.image_type = CL_MEM_OBJECT_IMAGE2D;
desc.image_width = w;
desc.image_height = h;
desc.image_row_pitch = desc.image_width * IMAGE_BPP;
OCL_CREATE_IMAGE(buf[0], CL_MEM_COPY_HOST_PTR, &format, &desc, buf_data[0]);
OCL_CREATE_BUFFER(buf[1], 0, sz, NULL);
/*copy image to buffer*/
size_t origin[3] = {0, 0, 0};
size_t region[3] = {w, h, 1};
OCL_CALL (clEnqueueCopyImageToBuffer, queue, buf[0], buf[1], origin, region,
0, 0, NULL, NULL);
OCL_FINISH();
OCL_MAP_BUFFER(1);
/*check result*/
for (uint32_t i = 0; i < w*h; ++i) {
OCL_ASSERT(((unsigned short *)buf_data[0])[i] == ((unsigned short *)buf_data[1])[i]);
}
OCL_UNMAP_BUFFER(1);
gettimeofday(&start,0);
for (uint32_t i=0; i<100; i++) {
OCL_CALL (clEnqueueCopyImageToBuffer, queue, buf[0], buf[1], origin, region,
0, 0, NULL, NULL);
}
OCL_FINISH();
gettimeofday(&stop,0);
free(buf_data[0]);
buf_data[0] = NULL;
double elapsed = time_subtract(&stop, &start, 0);
return BANDWIDTH(sz * 100, elapsed);
}
MAKE_BENCHMARK_FROM_FUNCTION(benchmark_copy_image_to_buffer);
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