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Commit | Line | Data |
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e143e9d8 DM |
1 | package PVE::ProcFSTools; |
2 | ||
3 | use strict; | |
4 | use POSIX; | |
5 | use Time::HiRes qw (gettimeofday); | |
6 | use IO::File; | |
7 | use PVE::Tools; | |
8 | ||
9 | my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK); | |
10 | ||
11 | my $cpuinfo; | |
12 | ||
e143e9d8 DM |
13 | sub read_cpuinfo { |
14 | my $fn = '/proc/cpuinfo'; | |
15 | ||
16 | return $cpuinfo if $cpuinfo; | |
17 | ||
18 | my $res = { | |
8104dfe3 | 19 | user_hz => $clock_ticks, |
e143e9d8 DM |
20 | model => 'unknown', |
21 | mhz => 0, | |
22 | cpus => 1, | |
e143e9d8 DM |
23 | }; |
24 | ||
25 | my $fh = IO::File->new ($fn, "r"); | |
26 | return $res if !$fh; | |
27 | ||
28 | my $count = 0; | |
29 | while (defined(my $line = <$fh>)) { | |
30 | if ($line =~ m/^processor\s*:\s*\d+\s*$/i) { | |
31 | $count++; | |
32 | } elsif ($line =~ m/^model\s+name\s*:\s*(.*)\s*$/i) { | |
33 | $res->{model} = $1 if $res->{model} eq 'unknown'; | |
34 | } elsif ($line =~ m/^cpu\s+MHz\s*:\s*(\d+\.\d+)\s*$/i) { | |
35 | $res->{mhz} = $1 if !$res->{mhz}; | |
e143e9d8 DM |
36 | } elsif ($line =~ m/^flags\s*:.*(vmx|svm)/) { |
37 | $res->{hvm} = 1; # Hardware Virtual Machine (Intel VT / AMD-V) | |
38 | } | |
39 | } | |
40 | ||
41 | $res->{cpus} = $count; | |
42 | ||
43 | $fh->close; | |
44 | ||
45 | $cpuinfo = $res; | |
46 | ||
47 | return $res; | |
48 | } | |
49 | ||
50 | sub read_proc_uptime { | |
51 | my $ticks = shift; | |
52 | ||
53 | my $line = PVE::Tools::file_read_firstline("/proc/uptime"); | |
54 | if ($line && $line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s*$|) { | |
55 | if ($ticks) { | |
5157a3a2 | 56 | return (int($1*$clock_ticks), int($2*$clock_ticks)); |
e143e9d8 DM |
57 | } else { |
58 | return (int($1), int($2)); | |
59 | } | |
60 | } | |
61 | ||
62 | return (0, 0); | |
63 | } | |
64 | ||
65 | sub read_loadavg { | |
66 | ||
67 | my $line = PVE::Tools::file_read_firstline('/proc/loadavg'); | |
68 | ||
69 | if ($line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s+(\d+\.\d+)\s+\d+/\d+\s+\d+\s*$|) { | |
70 | return wantarray ? ($1, $2, $3) : $1; | |
71 | } | |
72 | ||
73 | return wantarray ? (0, 0, 0) : 0; | |
74 | } | |
75 | ||
76 | my $last_proc_stat; | |
77 | ||
78 | sub read_proc_stat { | |
79 | my $res = { user => 0, nice => 0, system => 0, idle => 0 , sum => 0}; | |
80 | ||
81 | my $cpucount = 0; | |
82 | ||
83 | if (my $fh = IO::File->new ("/proc/stat", "r")) { | |
84 | while (defined (my $line = <$fh>)) { | |
85 | if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s|) { | |
86 | $res->{user} = $1; | |
87 | $res->{nice} = $2; | |
88 | $res->{system} = $3; | |
89 | $res->{idle} = $4; | |
90 | $res->{used} = $1+$2+$3; | |
91 | $res->{iowait} = $5; | |
92 | } elsif ($line =~ m|^cpu\d+\s|) { | |
93 | $cpucount++; | |
94 | } | |
95 | } | |
96 | $fh->close; | |
97 | } | |
98 | ||
99 | $cpucount = 1 if !$cpucount; | |
100 | ||
101 | my $ctime = gettimeofday; # floating point time in seconds | |
102 | ||
103 | $res->{ctime} = $ctime; | |
104 | $res->{cpu} = 0; | |
105 | $res->{wait} = 0; | |
106 | ||
107 | $last_proc_stat = $res if !$last_proc_stat; | |
108 | ||
109 | my $diff = ($ctime - $last_proc_stat->{ctime}) * $clock_ticks * $cpucount; | |
110 | ||
111 | if ($diff > 1000) { # don't update too often | |
112 | my $useddiff = $res->{used} - $last_proc_stat->{used}; | |
113 | $useddiff = $diff if $useddiff > $diff; | |
114 | $res->{cpu} = $useddiff/$diff; | |
115 | my $waitdiff = $res->{iowait} - $last_proc_stat->{iowait}; | |
116 | $waitdiff = $diff if $waitdiff > $diff; | |
117 | $res->{wait} = $waitdiff/$diff; | |
118 | $last_proc_stat = $res; | |
119 | } else { | |
120 | $res->{cpu} = $last_proc_stat->{cpu}; | |
121 | $res->{wait} = $last_proc_stat->{wait}; | |
122 | } | |
123 | ||
124 | return $res; | |
125 | } | |
126 | ||
5157a3a2 | 127 | sub read_proc_pid_stat { |
e143e9d8 DM |
128 | my $pid = shift; |
129 | ||
130 | my $statstr = PVE::Tools::file_read_firstline("/proc/$pid/stat"); | |
131 | ||
5157a3a2 DM |
132 | if ($statstr && $statstr =~ m/^$pid \(.*\) (\S) (-?\d+) -?\d+ -?\d+ -?\d+ -?\d+ \d+ \d+ \d+ \d+ \d+ (\d+) (\d+) (-?\d+) (-?\d+) -?\d+ -?\d+ -?\d+ 0 (\d+) (\d+) (-?\d+) \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ \d+ -?\d+ -?\d+ \d+ \d+ \d+/) { |
133 | return { | |
134 | status => $1, | |
135 | utime => $3, | |
136 | stime => $4, | |
137 | starttime => $7, | |
138 | vsize => $8, | |
139 | rss => $9 * 4096, | |
140 | }; | |
e143e9d8 DM |
141 | } |
142 | ||
5157a3a2 DM |
143 | return undef; |
144 | } | |
145 | ||
146 | sub check_process_running { | |
147 | my ($pid, $pstart) = @_; | |
148 | ||
149 | # note: waitpid only work for child processes, but not | |
150 | # for processes spanned by other processes. | |
151 | # kill(0, pid) return succes for zombies. | |
152 | # So we read the status form /proc/$pid/stat instead | |
153 | ||
154 | my $info = read_proc_pid_stat($pid); | |
155 | ||
5399d422 | 156 | return $info && (!$pstart || ($info->{starttime} eq $pstart)) && ($info->{status} ne 'Z') ? $info : undef; |
5157a3a2 DM |
157 | } |
158 | ||
159 | sub read_proc_starttime { | |
160 | my $pid = shift; | |
161 | ||
162 | my $info = read_proc_pid_stat($pid); | |
163 | return $info ? $info->{starttime} : 0; | |
e143e9d8 DM |
164 | } |
165 | ||
166 | sub read_meminfo { | |
167 | ||
168 | my $res = { | |
169 | memtotal => 0, | |
170 | memfree => 0, | |
171 | memused => 0, | |
172 | swaptotal => 0, | |
173 | swapfree => 0, | |
174 | swapused => 0, | |
175 | }; | |
176 | ||
177 | my $fh = IO::File->new ("/proc/meminfo", "r"); | |
178 | return $res if !$fh; | |
179 | ||
180 | my $d = {}; | |
181 | while (my $line = <$fh>) { | |
182 | if ($line =~ m/^(\S+):\s+(\d+)\s*kB/i) { | |
183 | $d->{lc ($1)} = $2 * 1024; | |
184 | } | |
185 | } | |
186 | close($fh); | |
187 | ||
188 | $res->{memtotal} = $d->{memtotal}; | |
189 | $res->{memfree} = $d->{memfree} + $d->{buffers} + $d->{cached}; | |
190 | $res->{memused} = $res->{memtotal} - $res->{memfree}; | |
191 | ||
192 | $res->{swaptotal} = $d->{swaptotal}; | |
193 | $res->{swapfree} = $d->{swapfree}; | |
194 | $res->{swapused} = $res->{swaptotal} - $res->{swapfree}; | |
195 | ||
196 | return $res; | |
197 | } | |
198 | ||
199 | # memory usage of current process | |
200 | sub read_memory_usage { | |
201 | ||
202 | my $res = { size => 0, resident => 0, shared => 0 }; | |
203 | ||
204 | my $ps = 4096; | |
205 | ||
206 | my $line = PVE::Tools::file_read_firstline("/proc/$$/statm"); | |
207 | ||
208 | if ($line =~ m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+/) { | |
209 | $res->{size} = $1*$ps; | |
210 | $res->{resident} = $2*$ps; | |
211 | $res->{shared} = $3*$ps; | |
212 | } | |
213 | ||
214 | return $res; | |
215 | } | |
216 | ||
217 | sub read_proc_net_dev { | |
218 | ||
219 | my $res = {}; | |
220 | ||
221 | my $fh = IO::File->new ("/proc/net/dev", "r"); | |
222 | return $res if !$fh; | |
223 | ||
224 | while (defined (my $line = <$fh>)) { | |
225 | if ($line =~ m/^\s*(.*):\s*(\d+)\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+(\d+)\s+/) { | |
226 | $res->{$1} = { | |
227 | receive => $2, | |
228 | transmit => $3, | |
229 | }; | |
230 | } | |
231 | } | |
232 | ||
233 | close($fh); | |
234 | ||
235 | return $res; | |
236 | } | |
237 | ||
238 | 1; |