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ocl_radix_sort.cpp
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#include <CL/cl.h>
#include "ocl/ocl_utils.h"
#include "ocl/ocl_program.h"
#include "ocl_test.h"
#include <assert.h>
#include <string.h>
#include "ocl_radix_sort.h"
bool rs_create_ocl_buffers(RadixSort_t* r, int* pel, int* pval, size_t num_el)
{
const int el_siz = sizeof(int);
cl_int status;
r->num_el_per_wg = r->NUM_EL_PER_WI * r->RADIX_BLK_SIZ;
r->num_el = r->num_el_per_wg * ((num_el + r->num_el_per_wg - 1) / r->num_el_per_wg);
r->src = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE|CL_MEM_COPY_HOST_PTR, num_el*el_siz, pel, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->src_v = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE|CL_MEM_COPY_HOST_PTR, num_el*el_siz, pval, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->dst = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE, num_el*el_siz, 0, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->dst_v = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE, num_el*el_siz, 0, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->num_blocks = r->num_el / r->num_el_per_wg;
r->hist_num_el = r->NUM_BINS * r->num_blocks;
r->hist = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE, r->hist_num_el*el_siz, 0, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->scan_num_el = r->num_blocks * r->NUM_BINS;
r->scan = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE, r->hist_num_el*el_siz, 0, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
r->bin_offsets = clCreateBuffer(ocl_get_context(), CL_MEM_READ_WRITE, r->NUM_BINS*el_siz, 0, &status); CHECK_OPENCL_ERROR(status, "clCreateBuffer failed. ");
return true;
}
bool rs_load_kernel(RadixSort_t* r)
{
char pflags[1024];
pflags[0] = '\0';
if(!r->program.load(DATA_ROOT"radix_sort.cl", pflags, ocl_get_context(), ocl_get_devices() + ocl_get_device_id(), 1))
return false;
bool b_success = true;
b_success = b_success && r->program.create_kernel("radix_hist");
b_success = b_success && r->program.create_kernel("radix_glob_scan");
b_success = b_success && r->program.create_kernel("excl_scan_bins");
b_success = b_success && r->program.create_kernel("remap");
return b_success;
}
bool rs_do()
{
RadixSort_t r;
size_t num_el = 1024;
int* pel = new int[num_el];
int* pval = new int[num_el];
for(size_t i=0;i<num_el;++i)
{
pel[i] = rand()%16;
pval[i] = pel[i] + 256;
}
if(!rs_create_ocl_buffers(&r, pel, pval, num_el))
return false;
if(!rs_load_kernel(&r))
return false;
cl_int status;
int mask = 0xF;
int shift = 0;
for(int i=0;i<2;++i)
{
cl_kernel k = r.program.kernels_["radix_hist"];
mask = 0xF << shift;
status = clSetKernelArg(k, 0, sizeof(cl_mem), &r.src); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 1, sizeof(cl_mem), &r.src_v); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 2, sizeof(cl_mem), &r.dst); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 3, sizeof(cl_mem), &r.dst_v); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 4, sizeof(cl_mem), &r.hist); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 5, sizeof(cl_mem), &r.scan); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 6, sizeof(cl_int), &mask); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 7, sizeof(cl_int), &shift); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
float total_exec_time = 0;
float exec_time;
if(!ocl_execute_kernel_1d_sync(k, r.RADIX_BLK_SIZ, r.num_blocks, &exec_time))
return false;
{
ScopedMap sm(r.hist);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.hist_num_el);
for(int j=0;j<r.num_blocks;++j)
{
for(int i=0;i<r.NUM_BINS;++i)
{
printf("%d ", p[j*r.NUM_BINS + i]);
}
printf("\n");
}
}
{
ScopedMap sm(r.scan);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.scan_num_el);
for(int j=0;j<r.num_blocks;++j)
{
for(int i=0;i<r.NUM_BINS;++i)
{
printf("%d ", p[j*r.NUM_BINS + i]);
}
printf("\n");
}
}
{
ScopedMap sm(r.dst);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.num_el);
for(int j=0;j<r.num_blocks;++j)
{
for(int i=0;i<r.num_el_per_wg;++i)
{
printf("%d ", p[j*r.num_el_per_wg + i]);
}
printf("\n");
}
}
k = r.program.kernels_["radix_glob_scan"];
status = clSetKernelArg(k, 0, sizeof(cl_mem), &r.scan); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 1, sizeof(cl_mem), &r.bin_offsets); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 2, sizeof(cl_mem), &r.num_blocks); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
// each WG processes up to 2*BLK_SIZ elements from one bin
int num_loc2glob_blocks = r.NUM_BINS * (r.num_blocks + 2*BLK_SIZ - 1) / (2*BLK_SIZ);
if(!ocl_execute_kernel_1d_sync(k, r.RADIX_BLK_SIZ, num_loc2glob_blocks, &exec_time))
return false;
{
ScopedMap sm(r.scan);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.scan_num_el);
for(int j=0;j<r.num_blocks;++j)
{
for(int i=0;i<r.NUM_BINS;++i)
{
printf("%d ", p[j*r.NUM_BINS + i]);
}
printf("\n");
}
}
{
ScopedMap sm(r.bin_offsets);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.NUM_BINS);
for(int i=0;i<r.NUM_BINS;++i)
{
printf("%d ", p[i]);
}
printf("\n");
}
k = r.program.kernels_["excl_scan_bins"];
status = clSetKernelArg(k, 0, sizeof(cl_mem), &r.bin_offsets); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
if(!ocl_execute_kernel_1d_sync(k, r.RADIX_BLK_SIZ, 1, &exec_time))
return false;
{
ScopedMap sm(r.bin_offsets);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*r.NUM_BINS);
for(int i=0;i<r.NUM_BINS;++i)
{
printf("%d ", p[i]);
}
printf("\n");
}
k = r.program.kernels_["remap"];
status = clSetKernelArg(k, 0, sizeof(cl_mem), &r.dst); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 1, sizeof(cl_mem), &r.dst_v); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 2, sizeof(cl_mem), &r.src); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 3, sizeof(cl_mem), &r.src_v); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 4, sizeof(cl_mem), &r.scan); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 5, sizeof(cl_mem), &r.bin_offsets); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 6, sizeof(cl_int), &mask); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
status = clSetKernelArg(k, 7, sizeof(cl_int), &shift); CHECK_OPENCL_ERROR(status, "clSetKernelArg failed.");
if(!ocl_execute_kernel_1d_sync(k, r.RADIX_BLK_SIZ, r.num_blocks, &exec_time))
return false;
{
ScopedMap sm(r.src);
int* p = (int*)sm.map(CL_MAP_READ, sizeof(int)*num_el);
int prev = p[0];
for(size_t i=0;i<num_el;++i)
{
printf("%d ", p[i]);
if(prev > p[i])
{
int adsfa=0;
}
prev = p[i];
}
printf("\n");
}
{
ScopedMap sm(r.scan);
int* p = (int*)sm.map(CL_MAP_WRITE, sizeof(int)*r.scan_num_el);
memset(p, 0, sizeof(int)*r.scan_num_el);
}
{
ScopedMap sm(r.hist);
int* p = (int*)sm.map(CL_MAP_WRITE, sizeof(int)*r.hist_num_el);
memset(p, 0, sizeof(int)*r.hist_num_el);
}
{
ScopedMap sm(r.bin_offsets);
int* p = (int*)sm.map(CL_MAP_WRITE, sizeof(int)*r.NUM_BINS);
memset(p, 0, sizeof(int)*r.NUM_BINS);
}
}
return true;
}