1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
// Copyright 2019 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 !nosoftnet
// +build !nosoftnet
package collector
import (
"fmt"
"log/slog"
"strconv"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/procfs"
)
type softnetCollector struct {
fs procfs.FS
processed *prometheus.Desc
dropped *prometheus.Desc
timeSqueezed *prometheus.Desc
cpuCollision *prometheus.Desc
receivedRps *prometheus.Desc
flowLimitCount *prometheus.Desc
softnetBacklogLen *prometheus.Desc
logger *slog.Logger
}
const (
softnetSubsystem = "softnet"
)
func init() {
registerCollector("softnet", defaultEnabled, NewSoftnetCollector)
}
// NewSoftnetCollector returns a new Collector exposing softnet metrics.
func NewSoftnetCollector(logger *slog.Logger) (Collector, error) {
fs, err := procfs.NewFS(*procPath)
if err != nil {
return nil, fmt.Errorf("failed to open procfs: %w", err)
}
return &softnetCollector{
fs: fs,
processed: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "processed_total"),
"Number of processed packets",
[]string{"cpu"}, nil,
),
dropped: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "dropped_total"),
"Number of dropped packets",
[]string{"cpu"}, nil,
),
timeSqueezed: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "times_squeezed_total"),
"Number of times processing packets ran out of quota",
[]string{"cpu"}, nil,
),
cpuCollision: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "cpu_collision_total"),
"Number of collision occur while obtaining device lock while transmitting",
[]string{"cpu"}, nil,
),
receivedRps: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "received_rps_total"),
"Number of times cpu woken up received_rps",
[]string{"cpu"}, nil,
),
flowLimitCount: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "flow_limit_count_total"),
"Number of times flow limit has been reached",
[]string{"cpu"}, nil,
),
softnetBacklogLen: prometheus.NewDesc(
prometheus.BuildFQName(namespace, softnetSubsystem, "backlog_len"),
"Softnet backlog status",
[]string{"cpu"}, nil,
),
logger: logger,
}, nil
}
// Update gets parsed softnet statistics using procfs.
func (c *softnetCollector) Update(ch chan<- prometheus.Metric) error {
var cpu string
stats, err := c.fs.NetSoftnetStat()
if err != nil {
return fmt.Errorf("could not get softnet statistics: %w", err)
}
for _, cpuStats := range stats {
cpu = strconv.FormatUint(uint64(cpuStats.Index), 10)
ch <- prometheus.MustNewConstMetric(
c.processed,
prometheus.CounterValue,
float64(cpuStats.Processed),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.dropped,
prometheus.CounterValue,
float64(cpuStats.Dropped),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.timeSqueezed,
prometheus.CounterValue,
float64(cpuStats.TimeSqueezed),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.cpuCollision,
prometheus.CounterValue,
float64(cpuStats.CPUCollision),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.receivedRps,
prometheus.CounterValue,
float64(cpuStats.ReceivedRps),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.flowLimitCount,
prometheus.CounterValue,
float64(cpuStats.FlowLimitCount),
cpu,
)
ch <- prometheus.MustNewConstMetric(
c.softnetBacklogLen,
prometheus.GaugeValue,
float64(cpuStats.SoftnetBacklogLen),
cpu,
)
}
return nil
}
|
