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Dynamically Select -cl-std Option (#879)

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* Dynamically select the `-cl-std` option on the basic `sizeof` and
`wg_barrier` tests to be one of `CL1.X`, `CL2.0` or `CL3.0`.
Use the most recent CL C standard supported on the device.
This commit is contained in:
Jack Frankland
2020-08-25 18:32:08 +02:00
committed by GitHub
parent faa6ad86c6
commit 0ba7cf1369
4 changed files with 163 additions and 8 deletions
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150
test_common/harness/kernelHelpers.cpp
View File

@@ -29,6 +29,7 @@
#include <sstream>
#include <iomanip>
#include <mutex>
#include <algorithm>
#if defined(_WIN32)
std::string slash = "\\";
@@ -809,6 +810,43 @@ int create_single_kernel_helper(cl_context context,
const char *buildOptions,
const bool openclCXX)
{
// For the logic that automatically adds -cl-std it is much cleaner if the
// build options have RAII. This buffer will store the potentially updated
// build options, in which case buildOptions will point at the string owned
// by this buffer.
std::string build_options_internal{ buildOptions ? buildOptions : "" };
// Check the build options for the -cl-std option.
if (!buildOptions || !strstr(buildOptions, "-cl-std"))
{
// If the build option isn't present add it using the latest OpenCL-C
// version supported by the device. This allows calling code to force a
// particular CL C version if it is required, but also means that
// callers need not specify a version if they want to assume the most
// recent CL C.
auto version = get_max_OpenCL_C_for_context(context);
std::string cl_std{};
if (version >= Version(3, 0))
{
cl_std = "-cl-std=CL3.0";
}
else if (version >= Version(2, 0) && version < Version(3, 0))
{
cl_std = "-cl-std=CL2.0";
}
else
{
// If the -cl-std build option is not specified, the highest OpenCL
// C 1.x language version supported by each device is used when
// compiling the program for each device.
cl_std = "";
}
build_options_internal += ' ';
build_options_internal += cl_std;
buildOptions = build_options_internal.c_str();
}
int error;
// Create OpenCL C++ program
if(openclCXX)
@@ -1543,3 +1581,115 @@ int printDeviceHeader( cl_device_id device )
return CL_SUCCESS;
}
Version get_device_cl_c_version(cl_device_id device)
{
// Get the device OpenCL version.
auto device_cl_version = get_device_cl_version(device);
// If the device version >= 3.0 it must support the
// CL_DEVICE_OPENCL_C_ALL_VERSIONS query from which we can extract the most
// recent CL C version supported by the device.
if (device_cl_version >= Version{ 3, 0 })
{
size_t opencl_c_all_versions_size_in_bytes{};
auto error =
clGetDeviceInfo(device, CL_DEVICE_OPENCL_C_ALL_VERSIONS, 0, nullptr,
&opencl_c_all_versions_size_in_bytes);
test_error_ret(
error, "clGetDeviceInfo failed for CL_DEVICE_OPENCL_C_ALL_VERSIONS",
(Version{ -1, 0 }));
std::vector<cl_name_version> name_versions(
opencl_c_all_versions_size_in_bytes / sizeof(cl_name_version));
error = clGetDeviceInfo(device, CL_DEVICE_OPENCL_C_ALL_VERSIONS,
opencl_c_all_versions_size_in_bytes,
name_versions.data(), nullptr);
test_error_ret(
error, "clGetDeviceInfo failed for CL_DEVICE_OPENCL_C_ALL_VERSIONS",
(Version{ -1, 0 }));
Version max_supported_cl_c_version{};
for (const auto &name_version : name_versions)
{
Version current_version{ CL_VERSION_MAJOR(name_version.version),
CL_VERSION_MINOR(name_version.version) };
max_supported_cl_c_version =
(current_version > max_supported_cl_c_version)
? current_version
: max_supported_cl_c_version;
}
return max_supported_cl_c_version;
}
// The second special case is OpenCL-1.0 where CL_DEVICE_OPENCL_C_VERSION
// did not exist, but since this is just the first version we can
// return 1.0.
if (device_cl_version == Version{ 1, 0 })
{
return Version{ 1, 0 };
}
// Otherwise we know we have a 1.1 <= device_version <= 2.0 where all CL C
// versions are backwards compatible, hence querying with the
// CL_DEVICE_OPENCL_C_VERSION query must return the most recent supported
// OpenCL C version.
size_t opencl_c_version_size_in_bytes{};
auto error = clGetDeviceInfo(device, CL_DEVICE_OPENCL_C_VERSION, 0, nullptr,
&opencl_c_version_size_in_bytes);
test_error_ret(error,
"clGetDeviceInfo failed for CL_DEVICE_OPENCL_C_VERSION\n",
(Version{ -1, 0 }));
std::string opencl_c_version(opencl_c_version_size_in_bytes, '\0');
error =
clGetDeviceInfo(device, CL_DEVICE_OPENCL_C_VERSION,
opencl_c_version.size(), &opencl_c_version[0], nullptr);
test_error_ret(error,
"clGetDeviceInfo failed for CL_DEVICE_OPENCL_C_VERSION\n",
(Version{ -1, 0 }));
// Scrape out the major, minor pair from the string.
auto major = opencl_c_version[opencl_c_version.find('.') - 1];
auto minor = opencl_c_version[opencl_c_version.find('.') + 1];
return Version{ major - '0', minor - '0' };
}
Version get_max_OpenCL_C_for_context(cl_context context)
{
// Get all the devices in the context and find the maximum
// universally supported OpenCL C version.
size_t devices_size_in_bytes{};
auto error = clGetContextInfo(context, CL_CONTEXT_DEVICES, 0, nullptr,
&devices_size_in_bytes);
test_error_ret(error, "clGetDeviceInfo failed for CL_CONTEXT_DEVICES",
(Version{ -1, 0 }));
std::vector<cl_device_id> devices(devices_size_in_bytes
/ sizeof(cl_device_id));
error = clGetContextInfo(context, CL_CONTEXT_DEVICES, devices_size_in_bytes,
devices.data(), nullptr);
auto current_version = get_device_cl_c_version(devices[0]);
std::for_each(std::next(devices.begin()), devices.end(),
[&current_version](cl_device_id device) {
auto device_version = get_device_cl_c_version(device);
// OpenCL 3.0 is not backwards compatible with 2.0.
// If we have 3.0 and 2.0 in the same driver we
// use 1.2.
if (((device_version >= Version(2, 0)
&& device_version < Version(3, 0))
&& current_version >= Version(3, 0))
|| (device_version >= Version(3, 0)
&& (current_version >= Version(2, 0)
&& current_version < Version(3, 0))))
{
current_version = Version(1, 2);
}
else
{
current_version =
(std::min)(device_version, current_version);
}
});
return current_version;
}

8
test_common/harness/kernelHelpers.h
View File

@@ -173,4 +173,12 @@ cl_device_fp_config get_default_rounding_mode( cl_device_id device );
/* Prints out the standard device header for all tests given the device to print for */
extern int printDeviceHeader( cl_device_id device );
// Gets the latest (potentially non-backward compatible) OpenCL C version
// supported by the device.
Version get_device_cl_c_version(cl_device_id device);
// Gets the maximum universally supported OpenCL C version in a context, i.e.
// the OpenCL C version supported by all devices in a context.
Version get_max_OpenCL_C_for_context(cl_context context);
#endif // _kernelHelpers_h