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add all2all commulication, fix gpu transfer (PaddlePaddle#67)
1. add all2all communication 2. fix gpu 2-hop transfer communication of v100/a100 3. detect nvlink and nic topo automatically
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| @@ -0,0 +1,85 @@ | ||
| // Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| #pragma once | ||
|
|
||
| #include <semaphore.h> | ||
| #include <pthread.h> | ||
| #include "paddle/fluid/platform/enforce.h" | ||
|
|
||
| namespace paddle { | ||
| namespace framework { | ||
| class Barrier { | ||
| public: | ||
| explicit Barrier(int count = 1) { | ||
| CHECK(count >= 1); | ||
| CHECK(0 == pthread_barrier_init(&_barrier, NULL, count)); | ||
| } | ||
| ~Barrier() { | ||
| CHECK(0 == pthread_barrier_destroy(&_barrier)); | ||
| } | ||
| void reset(int count) { | ||
| CHECK(count >= 1); | ||
| CHECK(0 == pthread_barrier_destroy(&_barrier)); | ||
| CHECK(0 == pthread_barrier_init(&_barrier, NULL, count)); | ||
| } | ||
| void wait() { | ||
| int err = pthread_barrier_wait(&_barrier); | ||
| CHECK( | ||
| (err = pthread_barrier_wait(&_barrier), err == 0 | ||
| || err == PTHREAD_BARRIER_SERIAL_THREAD)); | ||
| } | ||
| private: | ||
| pthread_barrier_t _barrier; | ||
| }; | ||
| // Call func(args...). If interrupted by signal, recall the function. | ||
| template<class FUNC, class ... ARGS> | ||
| auto ignore_signal_call(FUNC &&func, | ||
| ARGS &&... args) -> typename std::result_of<FUNC(ARGS...)>::type { | ||
| for (;;) { | ||
| auto err = func(args...); | ||
|
|
||
| if (err < 0 && errno == EINTR) { | ||
| LOG(INFO) << "Signal is caught. Ignored."; | ||
| continue; | ||
| } | ||
| return err; | ||
| } | ||
| } | ||
| class Semaphore { | ||
| public: | ||
| Semaphore() { | ||
| CHECK(0 == sem_init(&_sem, 0, 0)); | ||
| } | ||
| ~Semaphore() { | ||
| CHECK(0 == sem_destroy(&_sem)); | ||
| } | ||
| void post() { | ||
| CHECK(0 == sem_post(&_sem)); | ||
| } | ||
| void wait() { | ||
| CHECK(0 == ignore_signal_call(sem_wait, &_sem)); | ||
| } | ||
| bool try_wait() { | ||
| int err = 0; | ||
| CHECK( | ||
| (err = ignore_signal_call(sem_trywait, &_sem), err == 0 | ||
| || errno == EAGAIN)); | ||
| return err == 0; | ||
| } | ||
| private: | ||
| sem_t _sem; | ||
| }; | ||
| } | ||
| } |
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