rocm-systems/catch/unit/memory/hipMallocManaged.cc

/*
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   OUT OF OR INN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   THE SOFTWARE.
 */

/* Test Case Description:
   1) This testcase verifies the hipMallocManaged basic scenario - supported on
     all devices
   2) This testcase verifies the hipMallocManaged basic scenario - supported
       only on HMM enabled devices
*/

#include <hip_test_common.hh>
#include <hip_test_kernels.hh>
#include <hip_test_checkers.hh>



// Kernel functions

__global__ void KernelMul_MngdMem(int *Hmm, int *Dptr, size_t n) {
  size_t index = blockIdx.x * blockDim.x + threadIdx.x;
  size_t stride = blockDim.x * gridDim.x;
  for (size_t i = index; i < n; i += stride) {
    Hmm[i] = Dptr[i] * 10;
  }
}

__global__ void KernelMulAdd_MngdMem(int *Hmm, size_t n) {
  size_t index = blockIdx.x * blockDim.x + threadIdx.x;
  size_t stride = blockDim.x * gridDim.x;
  for (size_t i = index; i < n; i += stride) {
    Hmm[i] = Hmm[i] * 2 + 10;
  }
}

__global__ void KrnlWth2MemTypesC(unsigned char *Hmm, unsigned char *Dptr,
                                  size_t n) {
  size_t index = blockIdx.x * blockDim.x + threadIdx.x;
  size_t stride = blockDim.x * gridDim.x;
  for (size_t i = index; i < n; i += stride) {
    Hmm[i] = Dptr[i] + 10;
  }
}


static int HmmAttrPrint() {
  int managed = 0;
  INFO("The following are the attribute values related to HMM for"
         " device 0:\n");
  HIP_CHECK(hipDeviceGetAttribute(&managed,
              hipDeviceAttributeDirectManagedMemAccessFromHost, 0));
  INFO("hipDeviceAttributeDirectManagedMemAccessFromHost: " << managed);
  HIP_CHECK(hipDeviceGetAttribute(&managed,
                                 hipDeviceAttributeConcurrentManagedAccess, 0));
  INFO("hipDeviceAttributeConcurrentManagedAccess: " << managed);
  HIP_CHECK(hipDeviceGetAttribute(&managed,
                                 hipDeviceAttributePageableMemoryAccess, 0));
  INFO("hipDeviceAttributePageableMemoryAccess: " << managed);
  HIP_CHECK(hipDeviceGetAttribute(&managed,
              hipDeviceAttributePageableMemoryAccessUsesHostPageTables, 0));
  INFO("hipDeviceAttributePageableMemoryAccessUsesHostPageTables:"
         << managed);

  HIP_CHECK(hipDeviceGetAttribute(&managed, hipDeviceAttributeManagedMemory,
                                  0));
  INFO("hipDeviceAttributeManagedMemory: " << managed);
  return managed;
}



static size_t N{4 * 1024 * 1024};
static unsigned blocksPerCU{6};
static unsigned threadsPerBlock{256};

/*
   This testcase verifies the hipMallocManaged basic scenario - supported on all devices
 */

TEST_CASE("Unit_hipMallocManaged_Basic") {
    int numElements = (N < (64 * 1024 * 1024)) ? 64 * 1024 * 1024 : N;
    float *A, *B, *C;

    HIP_CHECK(hipMallocManaged(&A, numElements*sizeof(float)));
    HIP_CHECK(hipMallocManaged(&B, numElements*sizeof(float)));
    HIP_CHECK(hipMallocManaged(&C, numElements*sizeof(float)));
}

/*
   This testcase verifies the hipMallocManaged basic scenario - supported only on HMM enabled devices
 */

TEST_CASE("Unit_hipMallocManaged_Advanced") {
  int managed =  HmmAttrPrint();
  if (managed == 1) {
    int numElements = (N < (64 * 1024 * 1024)) ? 64 * 1024 * 1024 : N;
    float *A, *B, *C;

    HIP_CHECK(hipMallocManaged(&A, numElements*sizeof(float)));
    HIP_CHECK(hipMallocManaged(&B, numElements*sizeof(float)));
    HIP_CHECK(hipMallocManaged(&C, numElements*sizeof(float)));
    HipTest::setDefaultData(numElements, A, B, C);

    hipDevice_t device = hipCpuDeviceId;

    HIP_CHECK(hipMemAdvise(A, numElements*sizeof(float),
          hipMemAdviseSetReadMostly, device));
    HIP_CHECK(hipMemPrefetchAsync(A, numElements*sizeof(float), 0));
    HIP_CHECK(hipMemPrefetchAsync(B, numElements*sizeof(float), 0));
    HIP_CHECK(hipDeviceSynchronize());
    HIP_CHECK(hipMemRangeGetAttribute(&device, sizeof(device),
          hipMemRangeAttributeLastPrefetchLocation,
          A, numElements*sizeof(float)));
    if (device != 0) {
      INFO("hipMemRangeGetAttribute error, device = " << device);
    }
    uint32_t read_only = 0xf;
    HIP_CHECK(hipMemRangeGetAttribute(&read_only, sizeof(read_only),
          hipMemRangeAttributeReadMostly,
          A, numElements*sizeof(float)));
    if (read_only != 1) {
      SUCCEED("hipMemRangeGetAttribute error, read_only = " << read_only);
    }

    unsigned blocks = HipTest::setNumBlocks(blocksPerCU, threadsPerBlock,
                                            numElements);
    hipEvent_t event0, event1;
    HIP_CHECK(hipEventCreate(&event0));
    HIP_CHECK(hipEventCreate(&event1));
    HIP_CHECK(hipEventRecord(event0, 0));
    hipLaunchKernelGGL(HipTest::vectorADD, dim3(blocks), dim3(threadsPerBlock),
        0, 0, static_cast<const float*>(A),
        static_cast<const float*>(B), C, numElements);
    HIP_CHECK(hipEventRecord(event1, 0));
    HIP_CHECK(hipDeviceSynchronize());
    float time = 0.0f;
    HIP_CHECK(hipEventElapsedTime(&time, event0, event1));
    printf("Time %.3f ms\n", time);
    float maxError = 0.0f;
    HIP_CHECK(hipMemPrefetchAsync(B, numElements*sizeof(float),
                                  hipCpuDeviceId));
    HIP_CHECK(hipDeviceSynchronize());
    device = 0;
    HIP_CHECK(hipMemRangeGetAttribute(&device, sizeof(device),
          hipMemRangeAttributeLastPrefetchLocation,
          A, numElements*sizeof(float)));
    if (device != hipCpuDeviceId) {
      SUCCEED("hipMemRangeGetAttribute error device = " << device);
    }

    for (int i = 0; i < numElements; i++) {
      maxError = fmax(maxError, fabs(B[i]-3.0f));
    }
    HIP_CHECK(hipFree(A));
    HIP_CHECK(hipFree(B));
    REQUIRE(maxError != 0.0f);
  } else {
    SUCCEED("GPU 0 doesn't support hipDeviceAttributeManagedMemory "
           "attribute. Hence skipping the testing with Pass result.\n");
  }
}