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
108 righe
4.1 KiB
C++
108 righe
4.1 KiB
C++
// 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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#include <vector>
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#define HIP_CHECK(expression) \
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{ \
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const hipError_t err = expression; \
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if (err != hipSuccess) \
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{ \
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std::cout << "HIP Error: " << hipGetErrorString(err) \
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<< " at line " << __LINE__ << std::endl; \
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std::exit(EXIT_FAILURE); \
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} \
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}
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int main()
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{
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std::size_t elements = 64*1024;
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std::size_t size_bytes = elements * sizeof(float);
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std::vector<float> A(elements), B(elements);
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// On NVIDIA platforms the driver runtime needs to be initiated
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#ifdef __HIP_PLATFORM_NVIDIA__
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hipInit(0);
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hipDevice_t device;
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hipCtx_t context;
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HIP_CHECK(hipDeviceGet(&device, 0));
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HIP_CHECK(hipCtxCreate(&context, 0, device));
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#endif
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// Allocate device memory
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hipDeviceptr_t d_A, d_B;
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HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&d_A), size_bytes));
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HIP_CHECK(hipMalloc(reinterpret_cast<void**>(&d_B), size_bytes));
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// Copy data to device
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HIP_CHECK(hipMemcpyHtoD(d_A, A.data(), size_bytes));
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HIP_CHECK(hipMemcpyHtoD(d_B, B.data(), size_bytes));
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// Load module
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hipModule_t Module;
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// For AMD the module file has to contain architecture specific object code
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// For NVIDIA the module file has to contain PTX, found in e.g. "vcpy_isa.ptx"
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#ifdef __HIP_PLATFORM_AMD__
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HIP_CHECK(hipModuleLoad(&Module, "vcpy_isa.hsaco"));
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#elif defined(__HIP_PLATFORM_NVIDIA__)
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HIP_CHECK(hipModuleLoad(&Module, "vcpy_isa.ptx"));
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#endif
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// Get kernel function from the module via its name
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hipFunction_t Function;
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HIP_CHECK(hipModuleGetFunction(&Function, Module, "hello_world"));
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// Create buffer for kernel arguments
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std::vector<void*> argBuffer{reinterpret_cast<void*>(d_A), reinterpret_cast<void*>(d_B)};
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std::size_t arg_size_bytes = argBuffer.size() * sizeof(void*);
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// Create configuration passed to the kernel as arguments
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void* config[] = {HIP_LAUNCH_PARAM_BUFFER_POINTER, argBuffer.data(),
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HIP_LAUNCH_PARAM_BUFFER_SIZE, &arg_size_bytes,
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HIP_LAUNCH_PARAM_END};
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int threads_per_block = 128;
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int blocks = (elements + threads_per_block - 1) / threads_per_block;
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// Actually launch kernel
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HIP_CHECK(hipModuleLaunchKernel(Function, blocks, 1, 1, threads_per_block, 1, 1, 0, 0, NULL, config));
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HIP_CHECK(hipMemcpyDtoH(A.data(), d_A, elements));
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HIP_CHECK(hipMemcpyDtoH(B.data(), d_B, elements));
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HIP_CHECK(hipFree(reinterpret_cast<void*>(d_A)));
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HIP_CHECK(hipFree(reinterpret_cast<void*>(d_B)));
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#ifdef __HIP_PLATFORM_NVIDIA__
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HIP_CHECK(hipCtxDestroy(context));
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#endif
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return EXIT_SUCCESS;
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}
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// [sphinx-end]
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