mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
90 lines
2.6 KiB
Go
90 lines
2.6 KiB
Go
/**
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# Copyright (c) 2022, NVIDIA CORPORATION. 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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**/
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package proc
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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// GPUInfoField represents the field name for information specified in a GPU's information file
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type GPUInfoField string
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// The following constants define the fields of interest from the GPU information file
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const (
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GPUInfoModel = GPUInfoField("Model")
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GPUInfoGPUUUID = GPUInfoField("GPU UUID")
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GPUInfoBusLocation = GPUInfoField("Bus Location")
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GPUInfoDeviceMinor = GPUInfoField("Device Minor")
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)
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// GPUInfo stores the information for a GPU as determined from its associated information file
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type GPUInfo map[GPUInfoField]string
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// GetInformationFilePaths returns the list of information files associated with NVIDIA GPUs.
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func GetInformationFilePaths(root string) ([]string, error) {
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return filepath.Glob(filepath.Join(root, "/proc/driver/nvidia/gpus/*/information"))
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}
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// ParseGPUInformationFile parses the specified GPU information file and constructs a GPUInfo structure
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func ParseGPUInformationFile(path string) (GPUInfo, error) {
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infoFile, err := os.Open(path)
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if err != nil {
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return nil, fmt.Errorf("failed to open %v: %v", path, err)
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}
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defer infoFile.Close()
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return gpuInfoFrom(infoFile), nil
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}
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// gpuInfoFrom parses a GPUInfo struct from the specified reader
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// An information file has the following strucutre:
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// $ cat /proc/driver/nvidia/gpus/0000\:06\:00.0/information
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// Model: Tesla V100-SXM2-16GB
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// IRQ: 408
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// GPU UUID: GPU-edfee158-11c1-52b8-0517-92f30e7fac88
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// Video BIOS: 88.00.41.00.01
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// Bus Type: PCIe
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// DMA Size: 47 bits
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// DMA Mask: 0x7fffffffffff
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// Bus Location: 0000:06:00.0
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// Device Minor: 0
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// GPU Excluded: No
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func gpuInfoFrom(reader io.Reader) GPUInfo {
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info := make(GPUInfo)
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scanner := bufio.NewScanner(reader)
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for scanner.Scan() {
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line := scanner.Text()
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parts := strings.SplitN(line, ":", 2)
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if len(parts) != 2 {
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continue
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}
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field := GPUInfoField(parts[0])
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value := strings.TrimSpace(parts[1])
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info[field] = value
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}
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return info
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}
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