xpu/noise/noise.cpp

/*
  Copyright (c) 2020-2021, Intel Corporation
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:

    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.

    * Neither the name of Intel Corporation nor the names of its
      contributors may be used to endorse or promote products derived from
      this software without specific prior written permission.


   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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*/
#ifdef _MSC_VER
#define NOMINMAX
#pragma warning(disable : 4244)
#pragma warning(disable : 4305)
// preventing MSVC fopen() deprecation complaints
#define _CRT_SECURE_NO_DEPRECATE
#endif

#include <chrono>
#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <limits>

#include "common_helpers.h"
#include "timing.h"

// ispcrt
#include "ispcrt.hpp"


#define CORRECTNESS_THRESHOLD 0.0002
#define WIDTH 768
#define HEIGHT 768
#define SZ WIDTH *HEIGHT
#define TIMEOUT (40 * 1000)

extern void noise_serial(float x0, float y0, float x1, float y1, int width, int height, float output[]);

using namespace hostutil;

struct Parameters {
    float x0;
    float y0;
    float x1;
    float y1;
    int width;
    int height;
    float *output{nullptr};
};

static int run(int niter, int gx, int gy) {
    std::cout.setf(std::ios::unitbuf);
    const unsigned int height = HEIGHT;
    const unsigned int width = WIDTH;

    const float x0 = -10;
    const float y0 = -10;
    const float x1 = 10;
    const float y1 = 10;

    std::vector<float> buf(SZ);
    std::vector<float> gold(SZ);

    auto run_kernel = [&](ISPCRTDeviceType type) {
        ispcrt::Device device(type);

        // Setup output array
        ispcrt::Array<float> buf_dev(device, buf);

        // Setup parameters structure
        Parameters p;

        p.x0 = x0;
        p.y0 = y0;
        p.x1 = x1;
        p.y1 = y1;
        p.width = width;
        p.height = height;
        p.output = buf_dev.devicePtr();

        auto p_dev = ispcrt::Array<Parameters>(device, p);

        // Create module and kernel to execute
        ispcrt::Module module(device, "genx_noise");
        ispcrt::Kernel kernel(device, module, "noise_ispc");

        // Create task queue and execute kernel
        ispcrt::TaskQueue queue(device);
        double minCyclesISPC = 1e30;
        double kernelTicks = 1e30;
        const char *device_str = (type == ISPCRT_DEVICE_TYPE_GPU) ? "GPU" : "CPU";
        std::fill(buf.begin(), buf.end(), 0);
        for (unsigned int i = 0; i < niter; i++) {
            reset_and_start_timer();
            queue.copyToDevice(p_dev);
            queue.barrier();
            auto res = queue.launch(kernel, p_dev, gx, gy);
            queue.barrier();
            queue.copyToHost(buf_dev);
            queue.barrier();
            queue.sync();
            if (res.valid()) {
                kernelTicks = res.time() * 1e-6;
            }
            double mcycles = get_elapsed_mcycles();
            // Print resulting time
            printf("@time of %s run:\t\t\t[%.3f] milliseconds\n", device_str, kernelTicks);
            printf("@time of %s run:\t\t\t[%.3f] million cycles\n", device_str, mcycles);
            minCyclesISPC = std::min(minCyclesISPC, mcycles);
        }
        printf("[noise ISPC %s]:\t\t[%.3f] million cycles (%d x %d image)\n", device_str, minCyclesISPC, width, height);
    };

    run_kernel(ISPCRT_DEVICE_TYPE_CPU);
    run_kernel(ISPCRT_DEVICE_TYPE_GPU);

    double minCyclesSerial = 1e30;
    std::fill(gold.begin(), gold.end(), 0);
    for (unsigned int i = 0; i < niter; i++) {
        reset_and_start_timer();
        auto wct = std::chrono::system_clock::now();
        noise_serial(x0, y0, x1, y1, width, height, gold.data());
        double mcycles = get_elapsed_mcycles();
        auto dur = (std::chrono::system_clock::now() - wct);
        auto secs = std::chrono::duration_cast<std::chrono::milliseconds>(dur);

        // Print resulting time
        printf("@time of serial run:\t\t\t[%ld] milliseconds\n", secs.count());
        printf("@time of serial run:\t\t\t[%.3f] million cycles\n", mcycles);
        minCyclesSerial = std::min(minCyclesSerial, mcycles);
    }

    printf("[noise serial]:\t\t[%.3f] million cycles (%d x %d image)\n", minCyclesSerial, width, height);

    // Result check
    bool pass = true;
    double err = 0.0;
    double max_err = 0.0;

    int i = 0;
    for (; i < width * height; i++) {
        err = std::fabs(buf.at(i) - gold.at(i));
        max_err = std::max(err, max_err);
        if (err > CORRECTNESS_THRESHOLD) {
            pass = false;
            break;
        }
    }
    if (!pass) {
        std::cout << "Mismatch on " << i << "th value." << std::endl;
        std::cout << "Was " << buf.at(i) << ", should be " << gold.at(i) << std::endl;
    } else {
        std::cout << "No issues found, max error:" << max_err << std::endl;
    }

    return (pass) ? 0 : 1;
}

static void usage() {
    fprintf(stderr, "usage: noise [niterations] [group threads width] [group threads height]\n");
    exit(1);
}

int main(int argc, char *argv[]) {
    int niterations = 1;
    int gx = 1, gy = 8;
    if (argc == 4) {
        niterations = atoi(argv[1]);
        gx = atoi(argv[2]);
        gy = atoi(argv[3]);
    }
    if (niterations < 1 || gx < 1 || gy < 1) {
        usage();
    }
    int success = 0;

    std::cout << "Running test with " << niterations << " iterations of ISPC on GEN and CPU using " << gx << " * " << gy
              << " threads." << std::endl;
    success = run(niterations, gx, gy);

    return success;
}