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//
// Copyright (c) 2017 The Khronos Group Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "harness/compat.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <algorithm>
#include <numeric>
#include <vector>
#include "procs.h"
namespace {
const char *barrier_kernel_code = R"(
__kernel void compute_sum(__global int *a, int n, __global int *tmp_sum,
__global int *sum)
{
int tid = get_local_id(0);
int lsize = get_local_size(0);
int i;
tmp_sum[tid] = 0;
for (i = tid; i < n; i += lsize) tmp_sum[tid] += a[i];
// updated to work for any workgroup size
for (i = hadd(lsize, 1); lsize > 1; i = hadd(i, 1))
{
BARRIER(CLK_GLOBAL_MEM_FENCE);
if (tid + i < lsize) tmp_sum[tid] += tmp_sum[tid + i];
lsize = i;
}
// no barrier is required here because last person to write to tmp_sum[0]
// was tid 0
if (tid == 0) *sum = tmp_sum[0];
}
)";
void generate_random_inputs(std::vector<cl_int> &v)
{
RandomSeed seed(gRandomSeed);
auto random_generator = [&seed]() {
return static_cast<cl_int>(
get_random_float(-0x01000000, 0x01000000, seed));
};
std::generate(v.begin(), v.end(), random_generator);
}
int test_barrier_common(cl_device_id device, cl_context context,
cl_command_queue queue, int num_elements,
std::string barrier_str)
{
clMemWrapper streams[3];
clProgramWrapper program;
clKernelWrapper kernel;
cl_int output;
int err;
size_t max_threadgroup_size = 0;
std::string build_options = std::string("-DBARRIER=") + barrier_str;
err = create_single_kernel_helper(context, &program, &kernel, 1,
&barrier_kernel_code, "compute_sum",
build_options.c_str());
test_error(err, "Failed to build kernel/program.");
err = get_max_allowed_1d_work_group_size_on_device(device, kernel,
&max_threadgroup_size);
test_error(err, "get_max_allowed_1d_work_group_size_on_device failed.");
// work group size must divide evenly into the global size
while (num_elements % max_threadgroup_size) max_threadgroup_size--;
std::vector<cl_int> input(num_elements);
streams[0] = clCreateBuffer(context, CL_MEM_READ_WRITE,
sizeof(cl_int) * num_elements, nullptr, &err);
test_error(err, "clCreateBuffer failed.");
streams[1] = clCreateBuffer(context, CL_MEM_READ_WRITE, sizeof(cl_int),
nullptr, &err);
test_error(err, "clCreateBuffer failed.");
streams[2] =
clCreateBuffer(context, CL_MEM_READ_WRITE,
sizeof(cl_int) * max_threadgroup_size, nullptr, &err);
test_error(err, "clCreateBuffer failed.");
generate_random_inputs(input);
err = clEnqueueWriteBuffer(queue, streams[0], CL_TRUE, 0,
sizeof(cl_int) * num_elements, input.data(), 0,
nullptr, nullptr);
test_error(err, "clEnqueueWriteBuffer failed.");
err = clSetKernelArg(kernel, 0, sizeof(streams[0]), &streams[0]);
err |= clSetKernelArg(kernel, 1, sizeof(num_elements), &num_elements);
err |= clSetKernelArg(kernel, 2, sizeof(streams[2]), &streams[2]);
err |= clSetKernelArg(kernel, 3, sizeof(streams[1]), &streams[1]);
test_error(err, "clSetKernelArg failed.");
size_t global_threads[] = { max_threadgroup_size };
size_t local_threads[] = { max_threadgroup_size };
err = clEnqueueNDRangeKernel(queue, kernel, 1, nullptr, global_threads,
local_threads, 0, nullptr, nullptr);
test_error(err, "clEnqueueNDRangeKernel failed.");
err = clEnqueueReadBuffer(queue, streams[1], true, 0, sizeof(cl_int),
&output, 0, nullptr, nullptr);
test_error(err, "clEnqueueReadBuffer failed.");
if (std::accumulate(input.begin(), input.end(), 0) != output)
{
log_error("%s test failed\n", barrier_str.c_str());
err = -1;
}
else
{
log_info("%s test passed\n", barrier_str.c_str());
}
return err;
}
}
int test_barrier(cl_device_id device, cl_context context,
cl_command_queue queue, int num_elements)
{
return test_barrier_common(device, context, queue, num_elements, "barrier");
}
int test_wg_barrier(cl_device_id device, cl_context context,
cl_command_queue queue, int num_elements)
{
return test_barrier_common(device, context, queue, num_elements,
"work_group_barrier");
}
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