rocm-systems/tests/src/Functional/device/hipFuncDeviceSynchronize.cpp

/*
Copyright (c) 2015-2017 Advanced Micro Devices, Inc. All rights reserved.
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANNTY OF ANY KIND, EXPRESS OR
IMPLIED, INNCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
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THE SOFTWARE.
*/

/*
 * Test for checking the functionality of
 * hipError_t hipDeviceSynchronize();
 */

/* HIT_START
 * BUILD: %t %s ../../test_common.cpp
 * RUN: %t
 * HIT_END
 */

#include "test_common.h"

#define _SIZE sizeof(int) * 1024 * 1024
#define NUM_STREAMS 2

__global__ void Iter(int* Ad, int num) {
    int tx = threadIdx.x + blockIdx.x * blockDim.x;
    // Kernel loop designed to execute very slowly... ... ...   so we can test timing-related
    // behavior below
    if (tx == 0) {
        for (int i = 0; i < num; i++) {
            Ad[tx] += 1;
        }
    }
}

int main() {
    int* A[NUM_STREAMS];
    int* Ad[NUM_STREAMS];
    hipStream_t stream[NUM_STREAMS];
    for (int i = 0; i < NUM_STREAMS; i++) {
        HIPCHECK(hipHostMalloc((void**)&A[i], _SIZE, hipHostMallocDefault));
        A[i][0] = 1;
        HIPCHECK(hipMalloc((void**)&Ad[i], _SIZE));
        HIPCHECK(hipStreamCreate(&stream[i]));
    }
    for (int i = 0; i < NUM_STREAMS; i++) {
        HIPCHECK(hipMemcpyAsync(Ad[i], A[i], _SIZE, hipMemcpyHostToDevice, stream[i]));
    }
    for (int i = 0; i < NUM_STREAMS; i++) {
        hipLaunchKernelGGL(HIP_KERNEL_NAME(Iter), dim3(1), dim3(1), 0, stream[i], Ad[i], 1 << 30);
    }
    for (int i = 0; i < NUM_STREAMS; i++) {
        HIPCHECK(hipMemcpyAsync(A[i], Ad[i], _SIZE, hipMemcpyDeviceToHost, stream[i]));
    }


    // This first check but relies on the kernel running for so long that the D2H async memcopy has
    // not started yet. This will be true in an optimal asynchronous implementation. Conservative
    // implementations which synchronize the hipMemcpyAsync will fail, ie if
    // HIP_LAUNCH_BLOCKING=true
    HIPASSERT(1 << 30 != A[NUM_STREAMS - 1][0] - 1);
    HIPCHECK(hipDeviceSynchronize());
    HIPASSERT(1 << 30 == A[NUM_STREAMS - 1][0] - 1);
    passed();
}