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
|
// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package fdtrack logs statistics about open file descriptors.
package fdtrack
import (
"fmt"
"net"
"sort"
"sync"
"time"
"github.com/ethereum/go-ethereum/logger/glog"
)
var (
mutex sync.Mutex
all = make(map[string]int)
)
func Open(desc string) {
mutex.Lock()
all[desc] += 1
mutex.Unlock()
}
func Close(desc string) {
mutex.Lock()
defer mutex.Unlock()
if c, ok := all[desc]; ok {
if c == 1 {
delete(all, desc)
} else {
all[desc]--
}
}
}
func WrapListener(desc string, l net.Listener) net.Listener {
Open(desc)
return &wrappedListener{l, desc}
}
type wrappedListener struct {
net.Listener
desc string
}
func (w *wrappedListener) Accept() (net.Conn, error) {
c, err := w.Listener.Accept()
if err == nil {
c = WrapConn(w.desc, c)
}
return c, err
}
func (w *wrappedListener) Close() error {
err := w.Listener.Close()
if err == nil {
Close(w.desc)
}
return err
}
func WrapConn(desc string, conn net.Conn) net.Conn {
Open(desc)
return &wrappedConn{conn, desc}
}
type wrappedConn struct {
net.Conn
desc string
}
func (w *wrappedConn) Close() error {
err := w.Conn.Close()
if err == nil {
Close(w.desc)
}
return err
}
func Start() {
go func() {
for range time.Tick(15 * time.Second) {
mutex.Lock()
var sum, tracked = 0, []string{}
for what, n := range all {
sum += n
tracked = append(tracked, fmt.Sprintf("%s:%d", what, n))
}
mutex.Unlock()
used, _ := fdusage()
sort.Strings(tracked)
glog.Infof("fd usage %d/%d, tracked %d %v", used, fdlimit(), sum, tracked)
}
}()
}
|
