1 /* Copyright 2020 The TensorFlow Authors. All Rights Reserved.
2
3 Licensed under the Apache License, Version 2.0 (the "License");
4 you may not use this file except in compliance with the License.
5 You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9 Unless required by applicable law or agreed to in writing, software
10 distributed under the License is distributed on an "AS IS" BASIS,
11 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 See the License for the specific language governing permissions and
13 limitations under the License.
14 ==============================================================================*/
15 #include "tensorflow/core/common_runtime/permuter.h"
16
17 #include "tensorflow/core/common_runtime/collective_rma_local.h"
18 #include "tensorflow/core/common_runtime/collective_util.h"
19 #include "tensorflow/core/common_runtime/copy_tensor.h"
20 #include "tensorflow/core/common_runtime/device.h"
21 #include "tensorflow/core/common_runtime/device_mgr.h"
22 #include "tensorflow/core/common_runtime/dma_helper.h"
23 #include "tensorflow/core/common_runtime/process_util.h"
24 #include "tensorflow/core/framework/allocator.h"
25 #include "tensorflow/core/framework/device_base.h"
26 #include "tensorflow/core/framework/op_kernel.h"
27 #include "tensorflow/core/framework/tensor.h"
28 #include "tensorflow/core/framework/types.h"
29 #include "tensorflow/core/lib/core/errors.h"
30 #include "tensorflow/core/lib/core/notification.h"
31 #include "tensorflow/core/lib/core/status.h"
32 #include "tensorflow/core/lib/strings/str_util.h"
33 #include "tensorflow/core/lib/strings/strcat.h"
34 #include "tensorflow/core/platform/env.h"
35 #include "tensorflow/core/platform/types.h"
36
37 namespace tensorflow {
38
Permuter()39 Permuter::Permuter()
40 : col_ctx_(nullptr), col_params_(nullptr), done_(nullptr), counter_(0) {}
41
CheckCounterAndCallDone()42 StatusCallback Permuter::CheckCounterAndCallDone() {
43 return [this](const Status& s) {
44 mu_.lock();
45 status_.Update(s);
46 int counter = ++counter_;
47 Status status = status_;
48 mu_.unlock();
49 if (counter == 2) done_(status);
50 };
51 }
52
InitializeCollectiveContext(std::shared_ptr<CollectiveContext> col_ctx)53 Status Permuter::InitializeCollectiveContext(
54 std::shared_ptr<CollectiveContext> col_ctx) {
55 DCHECK(col_ctx->dev_mgr);
56 col_ctx_ = col_ctx;
57 col_params_ = col_ctx->col_params;
58 return collective_util::InitializeDeviceAndLocality(
59 col_ctx->dev_mgr, col_ctx->device_name, &col_ctx->device,
60 &col_ctx->device_locality);
61 }
62
Run(StatusCallback done)63 void Permuter::Run(StatusCallback done) {
64 if (col_params_->instance.permutation.size() !=
65 col_params_->instance.devices.size()) {
66 done(errors::Internal("Permutation must be the same size as devices"));
67 }
68 done_ = std::move(done);
69 DispatchSend(col_params_->default_rank,
70 col_params_->instance.permutation[col_params_->default_rank],
71 col_ctx_->input, CheckCounterAndCallDone());
72 for (int i = 0; i < col_params_->instance.permutation.size(); ++i) {
73 if (col_params_->default_rank == col_params_->instance.permutation[i]) {
74 DispatchRecv(i, col_params_->instance.permutation[i], col_ctx_->output,
75 CheckCounterAndCallDone());
76 }
77 }
78 }
79
DispatchSend(int src_rank,int target_rank,const Tensor * tensor,const StatusCallback & done)80 void Permuter::DispatchSend(int src_rank, int target_rank, const Tensor* tensor,
81 const StatusCallback& done) {
82 string send_buf_key =
83 strings::StrCat(col_ctx_->exec_key, src_rank, target_rank);
84 VLOG(1) << "DispatchSend " << send_buf_key << " from_device "
85 << col_ctx_->device_name << " to_device "
86 << col_params_->instance.devices[target_rank]
87 << " target_rank=" << target_rank << " src_rank=" << src_rank;
88 col_ctx_->col_exec->remote_access()->PostToPeer(
89 col_params_->instance.devices[target_rank],
90 col_params_->group.task_names[target_rank], send_buf_key,
91 col_ctx_->device, col_ctx_->op_ctx->op_device_context(),
92 col_ctx_->op_ctx->output_alloc_attr(0), tensor, col_ctx_->device_locality,
93 col_ctx_->op_ctx->cancellation_manager(), done);
94 }
95
DispatchRecv(int src_rank,int target_rank,Tensor * tensor,const StatusCallback & done)96 void Permuter::DispatchRecv(int src_rank, int target_rank, Tensor* tensor,
97 const StatusCallback& done) {
98 string recv_buf_key =
99 strings::StrCat(col_ctx_->exec_key, src_rank, target_rank);
100 VLOG(1) << "DispatchRecv " << recv_buf_key << " to_device "
101 << col_ctx_->device_name << " from_device "
102 << col_params_->instance.devices[src_rank]
103 << " target_rank=" << target_rank << " src_rank=" << src_rank;
104 col_ctx_->col_exec->remote_access()->RecvFromPeer(
105 col_params_->instance.devices[src_rank],
106 col_params_->group.task_names[src_rank],
107 col_params_->task.is_local[src_rank], recv_buf_key, col_ctx_->device,
108 col_ctx_->op_ctx->op_device_context(),
109 col_ctx_->op_ctx->output_alloc_attr(0), tensor, col_ctx_->device_locality,
110 0, col_ctx_->op_ctx->cancellation_manager(), done);
111 }
112 namespace {
113 REGISTER_COLLECTIVE(Permute, Permuter);
114 } // namespace
115
116 } // namespace tensorflow
117