TheRock/rocm-systems/projects/hip-tests/catch/unit/printf/hipPrintfManyDevices.cc

/*
 * Copyright (c) Advanced Micro Devices, Inc., or its affiliates.
 *
 * SPDX-License-Identifier: MIT
 */

#include <hip_test_common.hh>
#include <hip_test_defgroups.hh>
#include <map>
#include "printf_common.h"  // NOLINT

__global__ void print_things() {
  uint tid = hipThreadIdx_x + hipBlockIdx_x * hipBlockDim_x;
  const char* msg[] = {msg_short_dev, msg_long1_dev, msg_long2_dev};
  printf("%s\n", msg[tid % 3]);
  if (tid % 3 == 0) printf("%s\n", msg_short_dev);
  printf("%s\n", msg[(tid + 1) % 3]);
  printf("%s\n", msg[(tid + 2) % 3]);
}
/**
 * @addtogroup printf printf
 * @{
 * @ingroup PrintfTest
 * `int printf()` -
 * Method to print the content on output device.
 */
/**
 * Test Description
 * ------------------------
 * - Test case to verify printf API functionality on many devices
 * Test source
 * ------------------------
 * - catch/unit/printf/hipPrintfManyDevices.cc
 * Test requirements
 * ------------------------
 * - HIP_VERSION >= 6.2
 */
HIP_TEST_CASE(Unit_Printf_ManyDevicesTest) {
  int pcieAtomic = 0;
  HIP_CHECK(hipDeviceGetAttribute(&pcieAtomic, hipDeviceAttributeHostNativeAtomicSupported, 0));
  if (!pcieAtomic) {
    HIP_SKIP_TEST(HipTest::SkipReason::kPcieAtomicUnsupported);
  }
  uint num_blocks = 14;
  uint threads_per_block = 250;
  uint threads_per_device = num_blocks * threads_per_block;
  int num_devices = 0;
  HIP_CHECK(hipGetDeviceCount(&num_devices));
  CaptureStream captured(stdout);
  for (int i = 0; i != num_devices; ++i) {
    HIP_CHECK(hipSetDevice(i));
    hipLaunchKernelGGL(print_things, dim3(num_blocks), dim3(threads_per_block), 0, 0);
    HIP_CHECK(hipDeviceSynchronize());
  }
  auto CapturedData = captured.getCapturedData();
  std::map<std::string, int> linecount;
  for (std::string line; std::getline(CapturedData, line);) {
    linecount[line]++;
  }
  uint num_threads = threads_per_device * num_devices;
  REQUIRE(linecount.size() == 3);
  REQUIRE(linecount[msg_long1] == num_threads);
  REQUIRE(linecount[msg_long2] == num_threads);
  REQUIRE(linecount[msg_short] == num_threads + ((threads_per_device + 2) / 3) * num_devices);
}
/**
 * End doxygen group PrintfTest.
 * @}
 */