Istvan Kiss
197f73dac9
* Add examples to tools folder * Correct P2P memory access section * Sync poriting guide * Add HIP Graph tutorial * Add hint about using amdgpu-dkms for IPC API * Add a few more env variables
98 خطوط
3.4 KiB
Plaintext
98 خطوط
3.4 KiB
Plaintext
// MIT License
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//
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// Copyright (c) 2025 Advanced Micro Devices, Inc. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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// [sphinx-start]
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#include <hip/hip_runtime.h>
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#include <algorithm>
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#include <cstddef>
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#include <cstdlib>
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#include <iostream>
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#include <vector>
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#define HIP_CHECK(expression) \
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{ \
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const hipError_t status = expression; \
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if(status != hipSuccess) \
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{ \
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std::cerr << "HIP error " \
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<< status << ": " \
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<< hipGetErrorString(status) \
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<< " at " << __FILE__ << ":" \
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<< __LINE__ << std::endl; \
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} \
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}
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// Addition of two values.
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__global__ void add(int *a, int *b, int *c, std::size_t size)
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{
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const std::size_t index = threadIdx.x + blockDim.x * blockIdx.x;
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if(index < size)
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{
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c[index] += a[index] + b[index];
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}
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}
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int main()
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{
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constexpr int numOfBlocks = 256;
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constexpr int threadsPerBlock = 256;
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constexpr std::size_t arraySize = 1U << 16;
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std::vector<int> a(arraySize), b(arraySize), c(arraySize);
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int *d_a, *d_b, *d_c;
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// Setup input values.
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std::fill(a.begin(), a.end(), 1);
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std::fill(b.begin(), b.end(), 2);
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// Allocate device copies of a, b and c.
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HIP_CHECK(hipMalloc(&d_a, arraySize * sizeof(int)));
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HIP_CHECK(hipMalloc(&d_b, arraySize * sizeof(int)));
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HIP_CHECK(hipMalloc(&d_c, arraySize * sizeof(int)));
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// Copy input values to device.
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HIP_CHECK(hipMemcpy(d_a, a.data(), arraySize * sizeof(int), hipMemcpyHostToDevice));
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HIP_CHECK(hipMemcpy(d_b, b.data(), arraySize * sizeof(int), hipMemcpyHostToDevice));
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// Launch add() kernel on GPU.
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add<<<numOfBlocks, threadsPerBlock>>>(d_a, d_b, d_c, arraySize);
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// Check the kernel launch
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HIP_CHECK(hipGetLastError());
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// Check for kernel execution error
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HIP_CHECK(hipDeviceSynchronize());
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// Copy the result back to the host.
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HIP_CHECK(hipMemcpy(c.data(), d_c, arraySize * sizeof(int), hipMemcpyDeviceToHost));
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// Cleanup allocated memory.
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HIP_CHECK(hipFree(d_a));
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HIP_CHECK(hipFree(d_b));
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HIP_CHECK(hipFree(d_c));
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// Print the result.
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std::cout << a[0] << " + " << b[0] << " = " << c[0] << std::endl;
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return EXIT_SUCCESS;
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}
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// [sphinx-end]
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