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// Copyright 2021 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux
// +build linux
package sysfs
import (
"errors"
"fmt"
"path/filepath"
"regexp"
"syscall"
"github.com/prometheus/procfs/internal/util"
)
const (
// Supported device drivers.
deviceDriverAMDGPU = "amdgpu"
)
// ClassDRMCardAMDGPUStats contains info from files in
// /sys/class/drm/card<card>/device for a single amdgpu card.
// Not all cards expose all metrics.
// https://www.kernel.org/doc/html/latest/gpu/amdgpu.html
type ClassDRMCardAMDGPUStats struct {
Name string // The card name.
GPUBusyPercent uint64 // How busy the GPU is as a percentage.
MemoryGTTSize uint64 // The size of the graphics translation table (GTT) block in bytes.
MemoryGTTUsed uint64 // The used amount of the graphics translation table (GTT) block in bytes.
MemoryVisibleVRAMSize uint64 // The size of visible VRAM in bytes.
MemoryVisibleVRAMUsed uint64 // The used amount of visible VRAM in bytes.
MemoryVRAMSize uint64 // The size of VRAM in bytes.
MemoryVRAMUsed uint64 // The used amount of VRAM in bytes.
MemoryVRAMVendor string // The VRAM vendor name.
PowerDPMForcePerformanceLevel string // The current power performance level.
UniqueID string // The unique ID of the GPU that will persist from machine to machine.
}
// ClassDRMCardAMDGPUStats returns DRM card metrics for all amdgpu cards.
func (fs FS) ClassDRMCardAMDGPUStats() ([]ClassDRMCardAMDGPUStats, error) {
cards, err := filepath.Glob(fs.sys.Path("class/drm/card[0-9]"))
if err != nil {
return nil, err
}
var stats []ClassDRMCardAMDGPUStats
for _, card := range cards {
cardStats, err := parseClassDRMAMDGPUCard(card)
if err != nil {
if errors.Is(err, syscall.ENODATA) {
continue
}
return nil, err
}
cardStats.Name = filepath.Base(card)
stats = append(stats, cardStats)
}
return stats, nil
}
func parseClassDRMAMDGPUCard(card string) (ClassDRMCardAMDGPUStats, error) {
uevent, err := util.SysReadFile(filepath.Join(card, "device/uevent"))
if err != nil {
return ClassDRMCardAMDGPUStats{}, err
}
match, err := regexp.MatchString(fmt.Sprintf("DRIVER=%s", deviceDriverAMDGPU), uevent)
if err != nil {
return ClassDRMCardAMDGPUStats{}, err
}
if !match {
return ClassDRMCardAMDGPUStats{}, nil
}
stats := ClassDRMCardAMDGPUStats{Name: card}
// Read only specific files for faster data gathering.
if v, err := readDRMCardField(card, "gpu_busy_percent"); err == nil {
stats.GPUBusyPercent = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_gtt_total"); err == nil {
stats.MemoryGTTSize = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_gtt_used"); err == nil {
stats.MemoryGTTUsed = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_vis_vram_total"); err == nil {
stats.MemoryVisibleVRAMSize = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_vis_vram_used"); err == nil {
stats.MemoryVisibleVRAMUsed = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_vram_total"); err == nil {
stats.MemoryVRAMSize = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_vram_used"); err == nil {
stats.MemoryVRAMUsed = *util.NewValueParser(v).PUInt64()
}
if v, err := readDRMCardField(card, "mem_info_vram_vendor"); err == nil {
stats.MemoryVRAMVendor = v
}
if v, err := readDRMCardField(card, "power_dpm_force_performance_level"); err == nil {
stats.PowerDPMForcePerformanceLevel = v
}
if v, err := readDRMCardField(card, "unique_id"); err == nil {
stats.UniqueID = v
}
return stats, nil
}
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