【Hackathon 6th Fundable Projects 3 No.35】 [fluid_ops] c_comm_init_all

paddle/fluid/pir/dialect/op_generator/ops_api_gen.py

@@ -169,6 +169,7 @@
     'c_reduce_sum',
     'c_softmax_with_cross_entropy',
     'c_split',
+    'comm_init_all',
     'decayed_adagrad',
     'distributed_fused_lamb',
     'distributed_fused_lamb_',

paddle/fluid/primitive/codegen/gen.py

@@ -62,6 +62,7 @@
     "full",
     "partial_send",
     "push_dense",
+    "comm_init_all",
 ]
 
 # prim op with one input and one output, with no attribute

paddle/phi/core/platform/device/xpu/bkcl_helper.h

@@ -33,8 +33,183 @@
 #include "xpu/bkcl.h"
 #include "xpu/runtime.h"
 
+#define BKCL_ID_VARNAME "BKCLID"
+
 namespace paddle {
-namespace platform {}  // namespace platform
+namespace platform {
+
+inline int GetBKCLRankID(BKCLContext_t comm) {
+  return reinterpret_cast<int *>(comm)[0];
+}
+
+inline int GetBKCLDevID(BKCLContext_t comm) {
+  return reinterpret_cast<int *>(comm)[1];
+}
+
+inline int GetBKCLNRanks(BKCLContext_t comm) {
+  return reinterpret_cast<int *>(comm)[2];
+}
+
+class BKCLGroupGuard {
+ public:
+  static std::mutex &BKCLMutex() {
+    static std::mutex mtx;
+    return mtx;
+  }
+
+  inline BKCLGroupGuard() {
+    BKCLMutex().lock();
+    PADDLE_ENFORCE_XPU_SUCCESS(bkcl_group_start());
+  }
+
+  inline ~BKCLGroupGuard() PADDLE_MAY_THROW {
+    PADDLE_ENFORCE_XPU_SUCCESS(bkcl_group_end());
+    BKCLMutex().unlock();
+  }
+};
+
+struct BKCLContext {
+  std::unique_ptr<phi::XPUContext> ctx_;
+  BKCLContext_t comm_;
+
+  explicit BKCLContext(int dev_id)
+      : ctx_(new phi::XPUContext(phi::XPUPlace(dev_id))), comm_{nullptr} {}
+
+  XPUStream stream() const { return ctx_->stream(); }
+  BKCLContext_t comm() const { return comm_; }
+
+  int device_id() const { return ctx_->GetPlace().device; }
+};
+
+struct InitBKCLPara {
+  BKCLUniqueId *bkcl_id;
+  int rank;
+  int nranks;
+  int dev_id;
+  BKCLContext_t *ctx;
+};
+
+static void *init_bkcl_context_func(void *args) {
+  struct InitBKCLPara *para = (struct InitBKCLPara *)args;
+  platform::SetXPUDeviceId(para->dev_id);
+  PADDLE_ENFORCE_XPU_SUCCESS(
+      bkcl_init_rank(para->ctx, para->rank, para->nranks, para->bkcl_id));
+  return nullptr;
+}
+
+struct BKCLContextMap {
+  std::unordered_map<int, BKCLContext> contexts_;
+  std::vector<int> order_;
+  std::vector<phi::Place> places_;
+  size_t num_trainers_;
+  size_t trainer_id_;
+  BKCLUniqueId *bkcl_id_;
+
+  explicit BKCLContextMap(const std::vector<phi::Place> &places,
+                          BKCLUniqueId *bkcl_id = nullptr,
+                          size_t num_trainers = 1,
+                          size_t trainer_id = 0) {
+    places_ = places;
+    bkcl_id_ = bkcl_id;
+    num_trainers_ = num_trainers;
+    trainer_id_ = trainer_id;
+  }
+
+  // Synchronization is required and can only be initialized with
+  // multithreading.
+  int init() {
+    PADDLE_ENFORCE_EQ(
+        !places_.empty(),
+        true,
+        common::errors::InvalidArgument("The BKCL place should not be empty."));
+    order_.reserve(places_.size());
+    for (auto &p : places_) {
+      int dev_id = p.device;
+      order_.emplace_back(dev_id);
+      contexts_.emplace(dev_id, BKCLContext(dev_id));
+    }
+    PADDLE_ENFORCE_EQ(
+        order_.size(),
+        contexts_.size(),
+        common::errors::Unavailable("BKCL Context Map does not support "
+                                    "contain two or more same device"));
+
+    std::unique_ptr<BKCLContext_t[]> comms(new BKCLContext_t[order_.size()]);
+    std::unique_ptr<InitBKCLPara[]> paras(new InitBKCLPara[order_.size()]);
+    std::unique_ptr<pthread_t[]> pids(new pthread_t[order_.size()]);
+    BKCLResult_t ret;
+    BKCLUniqueId id;
+    // if num_trainers == 1, should create a new bkcl id for local comms.
+    if (num_trainers_ == 1 && bkcl_id_ == nullptr) {
+      ret = bkcl_get_unique_id(&id);
+      PADDLE_ENFORCE_EQ(BKCL_SUCCESS,
+                        ret,
+                        common::errors::PreconditionNotMet(
+                            "bkcl get unique id failed [%d]", ret));
+      bkcl_id_ = &id;
+    }
+    PADDLE_ENFORCE_NOT_NULL(
+        bkcl_id_,
+        common::errors::InvalidArgument("The BKCL id should not be null."));
+    {
+      int nranks = num_trainers_ * order_.size();
+      for (size_t i = 0; i < order_.size(); ++i) {
+        int rank;
+        if (order_.size() > 1) {
+          rank = trainer_id_ * order_.size() + i;
+        } else {
+          rank = trainer_id_;
+        }
+
+        paras[i].rank = rank;
+        paras[i].nranks = nranks;
+        paras[i].dev_id = order_[i];
+        paras[i].bkcl_id = bkcl_id_;
+        paras[i].ctx = &comms[i];
+        PADDLE_ENFORCE_EQ(pthread_create(&pids[i],
+                                         nullptr,
+                                         init_bkcl_context_func,
+                                         reinterpret_cast<void *>(&paras[i])),
+                          0,
+                          common::errors::External("pthread_create failed"));
+      }
+      for (size_t i = 0; i < order_.size(); i++) {
+        pthread_join(pids[i], nullptr);
+      }
+    }
+    int i = 0;
+    for (auto &dev_id : order_) {
+      contexts_.at(dev_id).comm_ = comms[i++];
+    }
+    return 0;
+  }
+
+  BKCLContextMap(const BKCLContextMap &other) = delete;
+  BKCLContextMap &operator=(const BKCLContextMap &other) = delete;
+
+  phi::XPUContext *DevCtx(int dev_id) const { return at(dev_id).ctx_.get(); }
+
+  phi::XPUContext *DevCtx(phi::Place p) const { return DevCtx(p.device); }
+
+  const BKCLContext &at(phi::Place p) const { return this->at(p.device); }
+
+  const BKCLContext &at(int dev_id) const { return contexts_.at(dev_id); }
+
+  void WaitAll() {
+    for (auto &p : contexts_) {
+      p.second.ctx_->Wait();
+    }
+  }
+};
+
+inline std::string GetFlatBKCLVarName(size_t pos) {
+  if (pos == 0) {
+    return BKCL_ID_VARNAME;
+  }
+  return string::Sprintf("%s_%d", BKCL_ID_VARNAME, static_cast<int>(pos));
+}
+
+}  // namespace platform
 }  // namespace paddle
 
 #endif  // PADDLE_WITH_XPU_BKCL