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
101 linhas
3.7 KiB
Plaintext
101 linhas
3.7 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 <cstddef>
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#include <cstdlib>
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#include <iostream>
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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 " << status \
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<< ": " << hipGetErrorString(status) \
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<< " at " << __FILE__ << ":" \
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<< __LINE__ << std::endl; \
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std::exit(EXIT_FAILURE); \
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} \
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}
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__global__ void simpleKernel(double *data, std::size_t elems)
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{
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int idx = blockIdx.x * blockDim.x + threadIdx.x;
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if(idx < elems)
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data[idx] = idx * 2.0;
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}
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int main()
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{
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int deviceCount;
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HIP_CHECK(hipGetDeviceCount(&deviceCount));
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if(deviceCount < 2)
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{
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std::cout << "This example requires at least two HIP devices." << std::endl;
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return EXIT_SUCCESS;
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}
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double* deviceData0;
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double* deviceData1;
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constexpr std::size_t elems = 1024;
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constexpr std::size_t size = elems * sizeof(double);
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int deviceId0 = 0;
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int deviceId1 = 1;
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// Set device 0 and perform operations
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HIP_CHECK(hipSetDevice(deviceId0)); // Set device 0 as current
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HIP_CHECK(hipMalloc(&deviceData0, size)); // Allocate memory on device 0
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simpleKernel<<<8, 128>>>(deviceData0, elems); // Launch kernel on device 0
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HIP_CHECK(hipDeviceSynchronize());
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// Set device 1 and perform operations
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HIP_CHECK(hipSetDevice(deviceId1)); // Set device 1 as current
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HIP_CHECK(hipMalloc(&deviceData1, size)); // Allocate memory on device 1
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simpleKernel<<<8, 128>>>(deviceData1, elems); // Launch kernel on device 1
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HIP_CHECK(hipDeviceSynchronize());
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// Copy result from device 0
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double hostData0[elems];
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HIP_CHECK(hipSetDevice(deviceId0));
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HIP_CHECK(hipMemcpy(hostData0, deviceData0, size, hipMemcpyDeviceToHost));
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// Copy result from device 1
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double hostData1[elems];
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HIP_CHECK(hipSetDevice(deviceId1));
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HIP_CHECK(hipMemcpy(hostData1, deviceData1, size, hipMemcpyDeviceToHost));
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// Display results from both devices
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std::cout << "Device 0 data: " << hostData0[0] << std::endl;
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std::cout << "Device 1 data: " << hostData1[0] << std::endl;
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// Free device memory
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HIP_CHECK(hipFree(deviceData0));
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HIP_CHECK(hipFree(deviceData1));
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return EXIT_SUCCESS;
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}
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// [sphinx-end]
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