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#include "utests/utest_helper.hpp"
#include <sys/time.h>
double benchmark_copy_buf(void)
{
size_t i;
const size_t sz = 127 *1023 * 1023;
const size_t cb = sz;
size_t src_off =0, dst_off = 0;
struct timeval start,stop;
cl_char* buf0;
OCL_CREATE_BUFFER(buf[0], 0, sz * sizeof(char), NULL);
OCL_CREATE_BUFFER(buf[1], 0, sz * sizeof(char), NULL);
buf0 = (cl_char *)clEnqueueMapBuffer(queue, buf[0], CL_TRUE, CL_MAP_WRITE, 0, sizeof(char), 0, NULL, NULL, NULL);
for (i=0; i < sz; i++) {
buf0[i]=(rand() & 0xFF);
}
clEnqueueUnmapMemObject(queue, buf[0], buf0, 0, NULL, NULL);
if (src_off + cb > sz || dst_off + cb > sz) {
/* Expect Error. */
OCL_ASSERT(clEnqueueCopyBuffer(queue, buf[0], buf[1],
src_off, dst_off, cb*sizeof(char), 0, NULL, NULL));
}
/* Internal kernel will be built for the first time of calling
* clEnqueueCopyBuffer, so the first execution time of clEnqueueCopyBuffer
* will be much longer. It should not be added to benchmark time. */
OCL_ASSERT(CL_SUCCESS == clEnqueueCopyBuffer(queue, buf[0], buf[1],
src_off, dst_off, cb*sizeof(char), 0, NULL, NULL));
OCL_FINISH();
gettimeofday(&start,0);
for (i=0; i<100; i++) {
OCL_ASSERT(CL_SUCCESS == clEnqueueCopyBuffer(queue, buf[0], buf[1],
src_off, dst_off, cb*sizeof(char), 0, NULL, NULL));
}
OCL_FINISH();
gettimeofday(&stop,0);
double elapsed = time_subtract(&stop, &start, 0);
return BANDWIDTH(sz * sizeof(char) * 100, elapsed);
}
MAKE_BENCHMARK_FROM_FUNCTION(benchmark_copy_buf, "GB/S");
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