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* [feat] support clearing prefix cache (cherry-picked from release/2.1) * [fix] fix ipc suffix, use port instead * [fix] fix prefix caching not enabled * [fix] fix code style * [fix] wait for rank0 to update weight status
72 lines
2.5 KiB
Plaintext
72 lines
2.5 KiB
Plaintext
// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "helper.h"
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#include "cuda_multiprocess.h"
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#if !defined(_WIN32)
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#include <errno.h>
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#include <string.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#endif
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// 可选：仅删除/解除共享内存命名对象（不依赖之前保存的 addr/fd）
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static inline int sharedMemoryUnlinkByName(const char* name) {
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#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
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// Windows 上没有 shm_unlink 语义。命名对象在最后一个句柄关闭后消失。
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// 这里做“尽力而为”：尝试打开后立即关闭，减少一次引用。
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HANDLE hMap = OpenFileMappingA(FILE_MAP_ALL_ACCESS, FALSE, name);
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if (hMap) {
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CloseHandle(hMap);
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return 0;
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}
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// 已经不存在也算成功
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return 0;
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#else
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// POSIX: 移除名字，未来不可再 open；已映射区仍存活直至 munmap
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if (shm_unlink(name) != 0) {
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if (errno == ENOENT) return 0; // 不存在视作成功
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return errno;
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}
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return 0;
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#endif
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}
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void UnsetDataIpc(const paddle::Tensor& tmp_input,
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const std::string& shm_name,
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bool close_ipc,
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bool unlink_shm) {
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// 1) 关闭消费者导入的 IPC 映射（仅当 close_ipc=true 且该指针确为 OpenMemHandle 得来）
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if (close_ipc) {
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void* ptr = const_cast<void*>(tmp_input.data());
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checkCudaErrors(cudaIpcCloseMemHandle(ptr));
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}
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// 2) 解除共享内存命名对象（仅处理“名字”，不保证解除旧映射）
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if (unlink_shm) {
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int rc = sharedMemoryUnlinkByName(shm_name.c_str());
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if (rc != 0) {
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PD_THROW("Unlink shared memory failed: name=%s, err=%d",
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shm_name.c_str(), rc);
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}
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}
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}
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PD_BUILD_STATIC_OP(unset_data_ipc)
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.Inputs({"tmp_input"})
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.Attrs({"shm_name: std::string", "close_ipc: bool", "unlink_shm: bool"})
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.SetKernelFn(PD_KERNEL(UnsetDataIpc));
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