rocm-systems/samples/api_buffered_tracing/main.cpp

/*
Copyright (c) 2015-2020 Advanced Micro Devices, Inc. All rights reserved.

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 "client.hpp"

#include "hip/hip_runtime.h"

#include <chrono>
#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <mutex>
#include <random>
#include <stdexcept>

#define HIP_API_CALL(CALL)                                                                         \
    {                                                                                              \
        hipError_t error_ = (CALL);                                                                \
        if(error_ != hipSuccess)                                                                   \
        {                                                                                          \
            auto _hip_api_print_lk = auto_lock_t{print_lock};                                      \
            fprintf(stderr,                                                                        \
                    "%s:%d :: HIP error : %s\n",                                                   \
                    __FILE__,                                                                      \
                    __LINE__,                                                                      \
                    hipGetErrorString(error_));                                                    \
            throw std::runtime_error("hip_api_call");                                              \
        }                                                                                          \
    }

namespace
{
using auto_lock_t                      = std::unique_lock<std::mutex>;
auto               print_lock          = std::mutex{};
size_t             nthreads            = 2;
size_t             nitr                = 500;
size_t             nsync               = 10;
constexpr unsigned shared_mem_tile_dim = 32;

void
check_hip_error(void);

void
verify(int* in, int* out, int M, int N);
}  // namespace

__global__ void
transpose_a(const int* in, int* out, int M, int N);

void
run(int rank, int tid, hipStream_t stream, int argc, char** argv);

int
main(int argc, char** argv)
{
    client::setup();  // forces rocprofiler to configure/initialize
    client::start();  // starts context before any API tables are available
    client::identify(1);

    int rank = 0;
    for(int i = 1; i < argc; ++i)
    {
        auto _arg = std::string{argv[i]};
        if(_arg == "?" || _arg == "-h" || _arg == "--help")
        {
            fprintf(stderr,
                    "usage: transpose [NUM_THREADS (%zu)] [NUM_ITERATION (%zu)] "
                    "[SYNC_EVERY_N_ITERATIONS (%zu)]\n",
                    nthreads,
                    nitr,
                    nsync);
            exit(EXIT_SUCCESS);
        }
    }
    if(argc > 1) nthreads = atoll(argv[1]);
    if(argc > 2) nitr = atoll(argv[2]);
    if(argc > 3) nsync = atoll(argv[3]);

    printf("[transpose] Number of threads: %zu\n", nthreads);
    printf("[transpose] Number of iterations: %zu\n", nitr);
    printf("[transpose] Syncing every %zu iterations\n", nsync);

    // this is a temporary workaround in omnitrace when HIP + MPI is enabled
    int ndevice = 0;
    int devid   = rank;
    HIP_API_CALL(hipGetDeviceCount(&ndevice));
    printf("[transpose] Number of devices found: %i\n", ndevice);
    if(ndevice > 0)
    {
        devid = rank % ndevice;
        HIP_API_CALL(hipSetDevice(devid));
        printf("[transpose] Rank %i assigned to device %i\n", rank, devid);
    }
    if(rank == devid && rank < ndevice)
    {
        std::vector<std::thread> _threads{};
        std::vector<hipStream_t> _streams(nthreads);
        for(size_t i = 0; i < nthreads; ++i)
            HIP_API_CALL(hipStreamCreate(&_streams.at(i)));
        for(size_t i = 1; i < nthreads; ++i)
            _threads.emplace_back(run, rank, i, _streams.at(i), argc, argv);
        run(rank, 0, _streams.at(0), argc, argv);
        for(auto& itr : _threads)
            itr.join();
        for(size_t i = 0; i < nthreads; ++i)
            HIP_API_CALL(hipStreamDestroy(_streams.at(i)));
    }
    HIP_API_CALL(hipDeviceSynchronize());
    HIP_API_CALL(hipDeviceReset());

    client::stop();
    client::shutdown();

    return 0;
}

__global__ void
transpose_a(const int* in, int* out, int M, int N)
{
    __shared__ int tile[shared_mem_tile_dim][shared_mem_tile_dim];

    int idx = (blockIdx.y * blockDim.y + threadIdx.y) * M + blockIdx.x * blockDim.x + threadIdx.x;
    tile[threadIdx.y][threadIdx.x] = in[idx];
    __syncthreads();
    idx      = (blockIdx.x * blockDim.x + threadIdx.y) * N + blockIdx.y * blockDim.y + threadIdx.x;
    out[idx] = tile[threadIdx.x][threadIdx.y];
}

void
run(int rank, int tid, hipStream_t stream, int argc, char** argv)
{
    client::identify(tid + 1);
    unsigned int M = 4960 * 2;
    unsigned int N = 4960 * 2;
    if(argc > 2) nitr = atoll(argv[2]);
    if(argc > 3) nsync = atoll(argv[3]);

    auto_lock_t _lk{print_lock};
    std::cout << "[" << rank << "][" << tid << "] M: " << M << " N: " << N << std::endl;
    _lk.unlock();

    std::default_random_engine         _engine{std::random_device{}() * (rank + 1) * (tid + 1)};
    std::uniform_int_distribution<int> _dist{0, 1000};

    size_t size       = sizeof(int) * M * N;
    int*   inp_matrix = new int[size];
    int*   out_matrix = new int[size];
    for(size_t i = 0; i < M * N; i++)
    {
        inp_matrix[i] = _dist(_engine);
        out_matrix[i] = 0;
    }
    int* in  = nullptr;
    int* out = nullptr;

    HIP_API_CALL(hipMalloc(&in, size));
    HIP_API_CALL(hipMalloc(&out, size));
    HIP_API_CALL(hipMemsetAsync(in, 0, size, stream));
    HIP_API_CALL(hipMemsetAsync(out, 0, size, stream));
    HIP_API_CALL(hipMemcpyAsync(in, inp_matrix, size, hipMemcpyHostToDevice, stream));
    HIP_API_CALL(hipStreamSynchronize(stream));

    dim3 grid(M / 32, N / 32, 1);
    dim3 block(32, 32, 1);  // transpose_a

    print_lock.lock();
    printf("[%i][%i] grid=(%i,%i,%i), block=(%i,%i,%i)\n",
           rank,
           tid,
           grid.x,
           grid.y,
           grid.z,
           block.x,
           block.y,
           block.z);
    print_lock.unlock();

    auto t1 = std::chrono::high_resolution_clock::now();
    for(size_t i = 0; i < nitr; ++i)
    {
        transpose_a<<<grid, block, 0, stream>>>(in, out, M, N);
        check_hip_error();
        if(i % nsync == (nsync - 1)) HIP_API_CALL(hipStreamSynchronize(stream));
    }
    auto t2 = std::chrono::high_resolution_clock::now();
    HIP_API_CALL(hipStreamSynchronize(stream));
    HIP_API_CALL(hipMemcpyAsync(out_matrix, out, size, hipMemcpyDeviceToHost, stream));
    double time = std::chrono::duration_cast<std::chrono::duration<double>>(t2 - t1).count();
    float  GB   = (float) size * nitr * 2 / (1 << 30);

    print_lock.lock();
    std::cout << "[" << rank << "][" << tid << "] Runtime of transpose is " << time << " sec\n"
              << "The average performance of transpose is " << GB / time << " GBytes/sec"
              << std::endl;
    print_lock.unlock();

    HIP_API_CALL(hipStreamSynchronize(stream));

    // cpu_transpose(matrix, out_matrix, M, N);
    verify(inp_matrix, out_matrix, M, N);

    HIP_API_CALL(hipFree(in));
    HIP_API_CALL(hipFree(out));

    delete[] inp_matrix;
    delete[] out_matrix;
}

namespace
{
void
check_hip_error(void)
{
    hipError_t err = hipGetLastError();
    if(err != hipSuccess)
    {
        auto_lock_t _lk{print_lock};
        std::cerr << "Error: " << hipGetErrorString(err) << std::endl;
        throw std::runtime_error("hip_api_call");
    }
}

void
verify(int* in, int* out, int M, int N)
{
    for(int i = 0; i < 10; i++)
    {
        int row = rand() % M;
        int col = rand() % N;
        if(in[row * N + col] != out[col * M + row])
        {
            auto_lock_t _lk{print_lock};
            std::cout << "mismatch: " << row << ", " << col << " : " << in[row * N + col] << " | "
                      << out[col * M + row] << "\n";
        }
    }
}
}  // namespace