mirror of
https://github.com/clearml/go-nvlib
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f13f6f0ac9
This change adds an nvinfo package with HasNVML and IsTegraSystem functions. These functions can be used to control behaviour on different platforms. Signed-off-by: Evan Lezar <elezar@nvidia.com>
66 lines
1.9 KiB
Go
66 lines
1.9 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 nvinfo
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import (
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"fmt"
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"os"
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"strings"
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"github.com/NVIDIA/go-nvml/pkg/dl"
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)
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// HasNVML returns true if NVML is detected on the system
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func HasNVML() (bool, string) {
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const (
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nvmlLibraryName = "libnvidia-ml.so.1"
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nvmlLibraryLoadFlags = dl.RTLD_LAZY
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)
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lib := dl.New(nvmlLibraryName, nvmlLibraryLoadFlags)
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if err := lib.Open(); err != nil {
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return false, fmt.Sprintf("could not load NVML: %v", err)
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}
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defer lib.Close()
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return true, "found NVML library"
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}
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// IsTegraSystem returns true if the system is detected as a Tegra-based system
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func IsTegraSystem() (bool, string) {
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const tegraReleaseFile = "/etc/nv_tegra_release"
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const tegraFamilyFile = "/sys/devices/soc0/family"
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if info, err := os.Stat(tegraReleaseFile); err == nil && !info.IsDir() {
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return true, fmt.Sprintf("%v found", tegraReleaseFile)
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}
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if info, err := os.Stat(tegraFamilyFile); err != nil || info.IsDir() {
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return false, fmt.Sprintf("%v file not found", tegraFamilyFile)
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}
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contents, err := os.ReadFile(tegraFamilyFile)
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if err != nil {
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return false, fmt.Sprintf("could not read %v", tegraFamilyFile)
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}
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if strings.HasPrefix(strings.ToLower(string(contents)), "tegra") {
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return true, fmt.Sprintf("%v has 'tegra' prefix", tegraFamilyFile)
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}
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return false, fmt.Sprintf("%v has no 'tegra' prefix", tegraFamilyFile)
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}
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