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/** \mainpage ROC Profiler Multi-Threaded Test Application
 *
 * \section introduction Introduction
 *
 * Test application launches an empty kernel on multiple threads.
 *
 * In subsequent tests, ROC profiler is run against this applicaiton
 * to confirm if collected contexts are valid.
 *
 */

#include <hip/hip_runtime.h>

#include <functional>
#include <thread>
#include <vector>

#include "utils/test_utils.h"

/** \mainpage ROC Profiler Test APplication
 *
 * \section introduction Introduction
 *
 * The goal of this test application is to launch an empty kernel
 * on multiple threads and multiple gpu's.
 *
 * Number of threads are caluculated based on the cores in the system
 * Number of gpus's are calculated based on the gpu's in the system
 */

// empty kernel
__global__ void kernel() {}

// launches kernel on multiple gpu's
void KernelLaunch() {
  // Multi-GPU
  int gpu_count = 0;
  hipGetDeviceCount(&gpu_count);

  for (uint32_t gpu_id = 0; gpu_id < gpu_count; gpu_id++) {
    // run empty kernel
    kernel<<<1, 1>>>();
  }
}

int main(int argc, char** argv) {
  // create as many threads as number of cores in system
  int threads_count = GetNumberOfCores();

  // create a pool of thrads
  std::vector<std::thread> threads(threads_count);

  // launch kernel on each thread
  for (int n = 0; n < threads_count; ++n) {
    threads[n] = std::thread(KernelLaunch);
  }
  // wait for all kernel launches to complete
  for (int n = 0; n < threads_count; ++n) {
    threads[n].join();
  }
}