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/*
* Copyright (c) 2021-2023, Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#include <iomanip>
#include <iostream>
#include <vector>
// Level Zero headers
#include <level_zero/ze_api.h>
#include <level_zero/zes_api.h>
// SYCL and interoperability headers
#include <CL/sycl.hpp>
#include <sycl/ext/oneapi/backend/level_zero.hpp>
#include "L0_helpers.h"
#include "simple-dpcpp.hpp"
using namespace hostutil;
DpcppApp::DpcppApp() {
m_device = ispcrt::Device(ISPCRT_DEVICE_TYPE_GPU);
m_module = ispcrt::Module(m_device, "xe_simple-dpcpp");
m_kernel = ispcrt::Kernel(m_device, m_module, "simple_ispc");
m_queue = ispcrt::TaskQueue(m_device);
initialized = true;
}
std::vector<float> DpcppApp::transformIspc(std::vector<float> &in) {
const auto count = in.size();
std::vector<float> out(count, 0.0f);
// Setup input array
ispcrt::Array<float> in_dev(m_device, in);
// Setup output array
ispcrt::Array<float> out_dev(m_device, out);
// Setup parameters structure
struct Parameters {
float *in;
float *out;
int count;
};
Parameters p;
p.in = in_dev.devicePtr();
p.out = out_dev.devicePtr();
p.count = count;
auto p_dev = ispcrt::Array<Parameters>(m_device, p);
// ispcrt::Array objects which used as inputs for ISPC kernel should be
// explicitly copied to device from host
m_queue.copyToDevice(p_dev);
m_queue.copyToDevice(in_dev);
// Launch the kernel on the device using 1 thread
m_queue.launch(m_kernel, p_dev, 1);
// ispcrt::Array objects which used as outputs of ISPC kernel should be
// explicitly copied to host from device
m_queue.copyToHost(out_dev);
// Execute queue and sync
m_queue.sync();
return out;
}
std::vector<float> DpcppApp::transformDpcpp(const std::vector<float> &in) {
const auto count = in.size();
std::vector<float> out(count, 0.0f);
// Create SYCL objects from native (Level Zero) handles
// Thanks to this API ISPCRT-based based programs
// can share device context with SYCL programs implemented
// using oneAPI DPC++ compiler
auto nativePlatform = static_cast<ze_driver_handle_t>(m_device.nativePlatformHandle());
auto nativeDevice = static_cast<ze_device_handle_t>(m_device.nativeDeviceHandle());
auto nativeContext = static_cast<ze_context_handle_t>(m_device.nativeContextHandle());
auto nativeQueue = static_cast<ze_command_queue_handle_t>(m_queue.nativeTaskQueueHandle());
auto platform = sycl::ext::oneapi::level_zero::make_platform((uintptr_t)nativePlatform);
auto device = sycl::ext::oneapi::level_zero::make_device(platform, (uintptr_t)nativeDevice);
auto ctx =
sycl::ext::oneapi::level_zero::make_context(platform.get_devices(), (uintptr_t)nativeContext,
/*keep ownership of nativeContext handler on ISPC side*/ true);
auto q = sycl::ext::oneapi::level_zero::make_queue(
ctx, device, (uintptr_t)nativeQueue, /* immediate command list*/ false,
/*keep ownership of m_command_queue handler on ISPC side*/ true, sycl::property_list{});
// Set problem space
sycl::range<1> range{count};
// Allocate buffers used for communication with the device
sycl::buffer<float, 1> in_buffer(in.data(), range);
sycl::buffer<float, 1> out_buffer(out.data(), range);
// Submit a job (implemented by a lambda function) to the queue
q.submit([&](cl::sycl::handler &cgh) {
// Accessors are used to access buffers on the device and on the host
auto in_access = in_buffer.get_access<cl::sycl::access::mode::read>(cgh);
auto out_access = out_buffer.get_access<cl::sycl::access::mode::write>(cgh);
// Execute kernel in parallel instances
cgh.parallel_for<class DpcppSimple>(range, [=](cl::sycl::id<1> idx) {
auto v = in_access[idx];
// This is the same computation as in ISPC kernel so we can compare the results
if (v < 3.)
v = v * v;
else
v = cl::sycl::sqrt(v);
out_access[idx] = v;
});
});
// Use accessor to transfer data from the device
std::vector<float> res(count);
const auto out_host_access = out_buffer.get_host_access();
for (int i = 0; i < out_host_access.size(); i++) {
res[i] = out_host_access[i];
}
return res;
}
// Compare two float vectors with an Epsilon
static bool operator==(const std::vector<float> &l, const std::vector<float> &r) {
constexpr float EPSILON = 0.01f;
if (l.size() != r.size())
return false;
for (unsigned int i = 0; i < l.size(); i++) {
if ((float)fabs(r[i] - l[i]) > EPSILON) {
return false;
}
}
return true;
}
bool DpcppApp::run() {
if (!initialized)
throw std::runtime_error("Trying to run test on uninitialized app");
constexpr int COUNT = 16;
std::vector<float> vin(COUNT);
// Make some changes (the same as in the ISPC Simple example)
// on a buffer using ISPC kernel
std::generate(vin.begin(), vin.end(), [i = 0]() mutable { return i++; });
auto vout_ispc = transformIspc(vin);
// Perform the same action using features of oneAPI DPC++ Compiler
std::generate(vin.begin(), vin.end(), [i = 0]() mutable { return i++; });
auto vout_dpcpp = transformDpcpp(vin);
std::cout << " ISPC DPCPP\n";
constexpr unsigned COLW = 6;
constexpr unsigned PREC = 3;
for (int i = 0; i < COUNT; i++) {
std::cout << "out[" << std::setw(2) << i << "] = " << std::fixed << std::setw(COLW) << std::setprecision(PREC)
<< vout_ispc[i] << std::fixed << std::setw(COLW) << std::setprecision(PREC) << vout_dpcpp[i] << '\n';
}
// Compare the results
if (vout_dpcpp != vout_ispc) {
std::cout << "Validation failed!\n";
return false;
}
std::cout << "Validation passed!\n";
return true;
}
int main() {
DpcppApp app;
bool pass = app.run();
return pass ? 0 : -1;
}
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