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https://github.com/KhronosGroup/OpenCL-CTS.git
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8bb89b165c
It seemed to be a typo; the comment says that it tries to fetch local size for a subgroup count with above max WG size, but it just used the previous subgroup count. The test on purpose sets a SG count to be a larger number than the max work-items in the work group. Given the minimum SG size is 1 WI, it means that there can be a maximum of maximum work-group size of SGs (of 1 WI of size). Thus, if we request a number of SGs that exceeds the local size, the query should fail as expected.
223 lines
9.7 KiB
C++
223 lines
9.7 KiB
C++
//
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// Copyright (c) 2017 The Khronos Group Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "testBase.h"
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#include "harness/typeWrappers.h"
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#include "harness/conversions.h"
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const char *subgroup_dispatch_kernel[] = {
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"#pragma OPENCL EXTENSION cl_khr_subgroups : enable\n"
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"__kernel void subgroup_dispatch_kernel(__global int *output)\n"
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"{\n"
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" size_t size = get_num_sub_groups ();\n"
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"\n"
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" output[0] = size;\n"
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"\n"
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"}\n" };
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size_t flatten_ndrange(size_t* ndrange, size_t dim)
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{
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switch(dim)
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{
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case 1:
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return *ndrange;
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case 2:
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return ndrange[0] * ndrange[1];
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case 3:
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return ndrange[0] * ndrange[1] * ndrange[2];
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default:
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log_error("ERROR: bad ndrange value");
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return 0;
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}
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}
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cl_int get_sub_group_num(cl_command_queue queue, cl_kernel kernel, clMemWrapper& out, size_t& size, size_t local_size, size_t dim)
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{
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size_t ndrange[3] = {local_size, 1, 1};
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cl_int error = CL_SUCCESS;
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size = 0;
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error = clSetKernelArg(kernel, 0, sizeof(out), &out);
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error += clEnqueueNDRangeKernel(queue, kernel, dim, NULL, ndrange, ndrange, 0, NULL, NULL);
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error += clEnqueueReadBuffer(queue, out, CL_TRUE, 0, 4, &size, 0, NULL, NULL);
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return error;
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}
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int test_sub_group_dispatch(cl_device_id deviceID, cl_context context, cl_command_queue queue, int num_elements)
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{
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int error;
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size_t realSize;
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size_t kernel_max_subgroup_size, kernel_subgroup_count;
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size_t max_local;
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cl_platform_id platform;
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clProgramWrapper program;
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clKernelWrapper kernel;
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clMemWrapper out;
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size_t ret_ndrange1d;
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size_t ret_ndrange2d[2];
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size_t ret_ndrange3d[3];
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size_t ret_ndrange2d_flattened;
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size_t ret_ndrange3d_flattened;
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if (get_device_cl_version(deviceID) >= Version(3, 0))
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{
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int error;
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cl_uint max_num_sub_groups;
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error = clGetDeviceInfo(deviceID, CL_DEVICE_MAX_NUM_SUB_GROUPS,
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sizeof(max_num_sub_groups), &max_num_sub_groups,
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NULL);
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if (error != CL_SUCCESS)
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{
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print_error(error, "Unable to get max num subgroups");
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return error;
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}
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if (max_num_sub_groups == 0)
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{
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return TEST_SKIPPED_ITSELF;
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}
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}
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error = create_single_kernel_helper(context, &program, &kernel, 1,
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subgroup_dispatch_kernel,
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"subgroup_dispatch_kernel");
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if (error != 0)
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return error;
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out = clCreateBuffer(context, CL_MEM_READ_WRITE | CL_MEM_ALLOC_HOST_PTR, sizeof(size_t), NULL, &error);
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test_error(error, "clCreateBuffer failed");
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error = clGetDeviceInfo(deviceID, CL_DEVICE_MAX_WORK_GROUP_SIZE, sizeof(size_t), &max_local, NULL);
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test_error(error, "clGetDeviceInfo failed");
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error = clGetDeviceInfo(deviceID, CL_DEVICE_PLATFORM, sizeof(platform), (void *)&platform, NULL);
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test_error(error, "clDeviceInfo failed for CL_DEVICE_PLATFORM");
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// Get the max subgroup size
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_MAX_SUB_GROUP_SIZE_FOR_NDRANGE,
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sizeof(max_local), &max_local, sizeof(kernel_max_subgroup_size), (void *)&kernel_max_subgroup_size, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_MAX_SUB_GROUP_SIZE_FOR_NDRANGE");
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log_info("The CL_KERNEL_MAX_SUB_GROUP_SIZE_FOR_NDRANGE for the kernel is %d.\n", (int)kernel_max_subgroup_size);
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if (realSize != sizeof(kernel_max_subgroup_size)) {
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log_error( "ERROR: Returned size of max sub group size not valid! (Expected %d, got %d)\n", (int)sizeof(kernel_max_subgroup_size), (int)realSize );
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return -1;
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}
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// Get the number of subgroup for max local size
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_SUB_GROUP_COUNT_FOR_NDRANGE,
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sizeof(max_local), &max_local, sizeof(kernel_subgroup_count), (void *)&kernel_subgroup_count, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_SUB_GROUP_COUNT_FOR_NDRANGE");
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log_info("The CL_KERNEL_SUB_GROUP_COUNT_FOR_NDRANGE for the kernel is %d.\n", (int)kernel_subgroup_count);
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if (realSize != sizeof(kernel_subgroup_count)) {
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log_error("ERROR: Returned size of sub group count not valid! "
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"(Expected %d, got %d)\n",
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(int)sizeof(kernel_subgroup_count), (int)realSize);
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return -1;
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}
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// test CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT
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for (size_t i = kernel_subgroup_count; i > 0; --i)
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{
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// test all 3 different dimention of requested local size
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size_t kernel_ret_size = 0;
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(i), &i, sizeof(ret_ndrange1d), &ret_ndrange1d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (realSize != sizeof(ret_ndrange1d)) {
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log_error( "ERROR: Returned size of sub group count not valid! (Expected %d, got %d)\n", (int)sizeof(kernel_subgroup_count), (int)realSize );
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return -1;
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}
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error = get_sub_group_num(queue, kernel, out, kernel_ret_size, ret_ndrange1d, 1);
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test_error(error, "Failed to query number of subgroups from kernel");
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if (i != kernel_ret_size)
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{
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log_error( "ERROR: Mismatch between requested number of subgroups and what get_num_sub_groups() in kernel returned! (Expected %d, got %d)\n", (int)i, (int)kernel_ret_size );
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return -1;
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}
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(i), &i, sizeof(ret_ndrange2d), ret_ndrange2d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (realSize != sizeof(ret_ndrange2d)) {
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log_error( "ERROR: Returned size of sub group count not valid! (Expected %d, got %d)\n", (int)sizeof(kernel_subgroup_count), (int)realSize );
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return -1;
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}
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ret_ndrange2d_flattened = flatten_ndrange(ret_ndrange2d, 2);
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error = get_sub_group_num(queue, kernel, out, kernel_ret_size, ret_ndrange2d_flattened, 2);
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test_error(error, "Failed to query number of subgroups from kernel");
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if (i != kernel_ret_size)
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{
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log_error( "ERROR: Mismatch between requested number of subgroups and what get_num_sub_groups() in kernel returned! (Expected %d, got %d)\n", (int)i, (int)kernel_ret_size );
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return -1;
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}
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(i), &i, sizeof(ret_ndrange3d), ret_ndrange3d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (realSize != sizeof(ret_ndrange3d)) {
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log_error( "ERROR: Returned size of sub group count not valid! (Expected %d, got %d)\n", (int)sizeof(kernel_subgroup_count), (int)realSize );
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return -1;
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}
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ret_ndrange3d_flattened = flatten_ndrange(ret_ndrange3d, 3);
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error = get_sub_group_num(queue, kernel, out, kernel_ret_size, ret_ndrange3d_flattened, 3);
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test_error(error, "Failed to query number of subgroups from kernel");
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if (i != kernel_ret_size)
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{
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log_error( "ERROR: Mismatch between requested number of subgroups and what get_num_sub_groups() in kernel returned! (Expected %d, got %d)\n", (int)i, (int)kernel_ret_size );
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return -1;
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}
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}
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// test when input subgroup count exceeds max wg size:
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// there can be at most the local size of (1 WI) subgroups
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size_t large_sg_size = max_local + 1;
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(size_t), &large_sg_size, sizeof(ret_ndrange1d), &ret_ndrange1d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (ret_ndrange1d != 0)
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{
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log_error( "ERROR: Incorrect value returned for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT! (Expected %d, got %d)\n", 0, (int)ret_ndrange1d );
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return -1;
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}
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(size_t), &large_sg_size, sizeof(ret_ndrange2d), ret_ndrange2d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (ret_ndrange2d[0] != 0 ||
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ret_ndrange2d[1] != 0)
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{
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log_error( "ERROR: Incorrect value returned for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT!" );
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return -1;
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}
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error = clGetKernelSubGroupInfo(kernel, deviceID, CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT, sizeof(size_t), &large_sg_size, sizeof(ret_ndrange3d), ret_ndrange3d, &realSize);
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test_error(error, "clGetKernelSubGroupInfo failed for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT");
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if (ret_ndrange3d[0] != 0 ||
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ret_ndrange3d[1] != 0 ||
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ret_ndrange3d[2] != 0)
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{
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log_error( "ERROR: Incorrect value returned for CL_KERNEL_LOCAL_SIZE_FOR_SUB_GROUP_COUNT!" );
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return -1;
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}
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return 0;
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}
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