1/* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
2
3Licensed under the Apache License, Version 2.0 (the "License");
4you may not use this file except in compliance with the License.
5You may obtain a copy of the License at
6
7 http://www.apache.org/licenses/LICENSE-2.0
8
9Unless required by applicable law or agreed to in writing, software
10distributed under the License is distributed on an "AS IS" BASIS,
11WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12See the License for the specific language governing permissions and
13limitations under the License.
14==============================================================================*/
15
16#include <memory>
17
18#include "tensorflow/core/grappler/devices.h"
19#include "tensorflow/core/platform/byte_order.h"
20#include "tensorflow/core/platform/cpu_info.h"
21
22#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
23#include "tensorflow/core/common_runtime/gpu/gpu_init.h"
24#include "tensorflow/core/platform/stream_executor.h"
25#endif // GOOGLE_CUDA
26
27namespace tensorflow {
28namespace grappler {
29
30int GetNumAvailableGPUs(
31 const std::pair<int, int>& min_cuda_compute_capability) {
32 int num_eligible_gpus = 0;
33
34#if TENSORFLOW_USE_ROCM
35 if (min_cuda_compute_capability.first != 0 ||
36 min_cuda_compute_capability.second != 0) {
37 LOG(ERROR) << "GetNumAvailableGPUs() should receive zero "
38 "min_cuda_compute_capability";
39 return 0;
40 }
41#endif
42#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
43 if (ValidateGPUMachineManager().ok()) {
44 se::Platform* gpu_manager = GPUMachineManager();
45 if (gpu_manager != nullptr) {
46 int num_gpus = gpu_manager->VisibleDeviceCount();
47 for (int i = 0; i < num_gpus; i++) {
48#if GOOGLE_CUDA
49 auto desc = gpu_manager->DescriptionForDevice(i);
50 if (desc.ok()) {
51 int min_gpu_core_count = 8;
52 if ((*desc)->core_count() >= min_gpu_core_count &&
53 (*desc)->cuda_compute_capability().IsAtLeast(
54 min_cuda_compute_capability.first,
55 min_cuda_compute_capability.second)) {
56 num_eligible_gpus++;
57 }
58 }
59#else
60 num_eligible_gpus++;
61#endif
62 }
63 }
64 }
65#if GOOGLE_CUDA
66 LOG(INFO)
67 << "Number of eligible GPUs (core count >= 8, compute capability >= "
68 << min_cuda_compute_capability.first << "."
69 << min_cuda_compute_capability.second << "): " << num_eligible_gpus;
70#else
71 LOG(INFO) << "Number of eligible GPUs: " << num_eligible_gpus;
72#endif
73
74#else // GOOGLE_CUDA || TENSORFLOW_USE_ROCM
75 LOG(INFO)
76 << "Number of eligible GPUs (core count >= 8, compute capability >= "
77 << min_cuda_compute_capability.first << "."
78 << min_cuda_compute_capability.second << "): " << num_eligible_gpus
79 << " (Note: TensorFlow was not compiled with CUDA or ROCm support)";
80#endif // GOOGLE_CUDA || TENSORFLOW_USE_ROCM
81 return num_eligible_gpus;
82}
83
84int64_t AvailableGPUMemory(int gpu_id) {
85#if GOOGLE_CUDA || TENSORFLOW_USE_ROCM
86 // Look up the device, to see its attributes.
87 se::Platform* gpu_platform = GPUMachineManager();
88 CHECK_LT(gpu_id, gpu_platform->VisibleDeviceCount());
89 se::StreamExecutor* se = gpu_platform->ExecutorForDevice(gpu_id).value();
90 int64_t total_memory, available_memory;
91 CHECK(se->DeviceMemoryUsage(&available_memory, &total_memory));
92
93 return available_memory;
94#else
95 return 0;
96#endif
97}
98
99int GetNumAvailableLogicalCPUCores() { return port::NumSchedulableCPUs(); }
100
101} // end namespace grappler
102} // end namespace tensorflow
103