]>
Commit | Line | Data |
---|---|---|
e143e9d8 DM |
1 | package PVE::ProcFSTools; |
2 | ||
3 | use strict; | |
c36f332e | 4 | use warnings; |
e143e9d8 DM |
5 | use POSIX; |
6 | use Time::HiRes qw (gettimeofday); | |
7 | use IO::File; | |
8 | use PVE::Tools; | |
9 | ||
10 | my $clock_ticks = POSIX::sysconf(&POSIX::_SC_CLK_TCK); | |
11 | ||
12 | my $cpuinfo; | |
13 | ||
e143e9d8 DM |
14 | sub read_cpuinfo { |
15 | my $fn = '/proc/cpuinfo'; | |
16 | ||
17 | return $cpuinfo if $cpuinfo; | |
18 | ||
19 | my $res = { | |
8104dfe3 | 20 | user_hz => $clock_ticks, |
e143e9d8 DM |
21 | model => 'unknown', |
22 | mhz => 0, | |
23 | cpus => 1, | |
66bda4e0 | 24 | sockets => 1, |
e143e9d8 DM |
25 | }; |
26 | ||
27 | my $fh = IO::File->new ($fn, "r"); | |
28 | return $res if !$fh; | |
29 | ||
4235c2f3 | 30 | my $idhash = {}; |
e143e9d8 DM |
31 | my $count = 0; |
32 | while (defined(my $line = <$fh>)) { | |
33 | if ($line =~ m/^processor\s*:\s*\d+\s*$/i) { | |
34 | $count++; | |
35 | } elsif ($line =~ m/^model\s+name\s*:\s*(.*)\s*$/i) { | |
36 | $res->{model} = $1 if $res->{model} eq 'unknown'; | |
37 | } elsif ($line =~ m/^cpu\s+MHz\s*:\s*(\d+\.\d+)\s*$/i) { | |
38 | $res->{mhz} = $1 if !$res->{mhz}; | |
e143e9d8 DM |
39 | } elsif ($line =~ m/^flags\s*:.*(vmx|svm)/) { |
40 | $res->{hvm} = 1; # Hardware Virtual Machine (Intel VT / AMD-V) | |
66bda4e0 | 41 | } elsif ($line =~ m/^physical id\s*:\s*(\d+)\s*$/i) { |
4235c2f3 | 42 | $idhash->{$1} = 1; |
e143e9d8 DM |
43 | } |
44 | } | |
45 | ||
4235c2f3 DM |
46 | $res->{sockets} = scalar(keys %$idhash) || 1; |
47 | ||
e143e9d8 DM |
48 | $res->{cpus} = $count; |
49 | ||
50 | $fh->close; | |
51 | ||
52 | $cpuinfo = $res; | |
53 | ||
54 | return $res; | |
55 | } | |
56 | ||
57 | sub read_proc_uptime { | |
58 | my $ticks = shift; | |
59 | ||
60 | my $line = PVE::Tools::file_read_firstline("/proc/uptime"); | |
61 | if ($line && $line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s*$|) { | |
62 | if ($ticks) { | |
5157a3a2 | 63 | return (int($1*$clock_ticks), int($2*$clock_ticks)); |
e143e9d8 DM |
64 | } else { |
65 | return (int($1), int($2)); | |
66 | } | |
67 | } | |
68 | ||
69 | return (0, 0); | |
70 | } | |
71 | ||
72 | sub read_loadavg { | |
73 | ||
74 | my $line = PVE::Tools::file_read_firstline('/proc/loadavg'); | |
75 | ||
76 | if ($line =~ m|^(\d+\.\d+)\s+(\d+\.\d+)\s+(\d+\.\d+)\s+\d+/\d+\s+\d+\s*$|) { | |
77 | return wantarray ? ($1, $2, $3) : $1; | |
78 | } | |
79 | ||
80 | return wantarray ? (0, 0, 0) : 0; | |
81 | } | |
82 | ||
83 | my $last_proc_stat; | |
84 | ||
85 | sub read_proc_stat { | |
86 | my $res = { user => 0, nice => 0, system => 0, idle => 0 , sum => 0}; | |
87 | ||
88 | my $cpucount = 0; | |
89 | ||
90 | if (my $fh = IO::File->new ("/proc/stat", "r")) { | |
91 | while (defined (my $line = <$fh>)) { | |
92 | if ($line =~ m|^cpu\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s|) { | |
93 | $res->{user} = $1; | |
94 | $res->{nice} = $2; | |
95 | $res->{system} = $3; | |
96 | $res->{idle} = $4; | |
97 | $res->{used} = $1+$2+$3; | |
98 | $res->{iowait} = $5; | |
99 | } elsif ($line =~ m|^cpu\d+\s|) { | |
100 | $cpucount++; | |
101 | } | |
102 | } | |
103 | $fh->close; | |
104 | } | |
105 | ||
106 | $cpucount = 1 if !$cpucount; | |
107 | ||
108 | my $ctime = gettimeofday; # floating point time in seconds | |
109 | ||
110 | $res->{ctime} = $ctime; | |
111 | $res->{cpu} = 0; | |
112 | $res->{wait} = 0; | |
113 | ||
114 | $last_proc_stat = $res if !$last_proc_stat; | |
115 | ||
116 | my $diff = ($ctime - $last_proc_stat->{ctime}) * $clock_ticks * $cpucount; | |
117 | ||
118 | if ($diff > 1000) { # don't update too often | |
119 | my $useddiff = $res->{used} - $last_proc_stat->{used}; | |
120 | $useddiff = $diff if $useddiff > $diff; | |
121 | $res->{cpu} = $useddiff/$diff; | |
122 | my $waitdiff = $res->{iowait} - $last_proc_stat->{iowait}; | |
123 | $waitdiff = $diff if $waitdiff > $diff; | |
124 | $res->{wait} = $waitdiff/$diff; | |
125 | $last_proc_stat = $res; | |
126 | } else { | |
127 | $res->{cpu} = $last_proc_stat->{cpu}; | |
128 | $res->{wait} = $last_proc_stat->{wait}; | |
129 | } | |
130 | ||
131 | return $res; | |
132 | } | |
133 | ||
5157a3a2 | 134 | sub read_proc_pid_stat { |
e143e9d8 DM |
135 | my $pid = shift; |
136 | ||
137 | my $statstr = PVE::Tools::file_read_firstline("/proc/$pid/stat"); | |
138 | ||
5157a3a2 DM |
139 | 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+/) { |
140 | return { | |
141 | status => $1, | |
142 | utime => $3, | |
143 | stime => $4, | |
144 | starttime => $7, | |
145 | vsize => $8, | |
146 | rss => $9 * 4096, | |
147 | }; | |
e143e9d8 DM |
148 | } |
149 | ||
5157a3a2 DM |
150 | return undef; |
151 | } | |
152 | ||
153 | sub check_process_running { | |
154 | my ($pid, $pstart) = @_; | |
155 | ||
156 | # note: waitpid only work for child processes, but not | |
157 | # for processes spanned by other processes. | |
158 | # kill(0, pid) return succes for zombies. | |
159 | # So we read the status form /proc/$pid/stat instead | |
160 | ||
161 | my $info = read_proc_pid_stat($pid); | |
162 | ||
5399d422 | 163 | return $info && (!$pstart || ($info->{starttime} eq $pstart)) && ($info->{status} ne 'Z') ? $info : undef; |
5157a3a2 DM |
164 | } |
165 | ||
166 | sub read_proc_starttime { | |
167 | my $pid = shift; | |
168 | ||
169 | my $info = read_proc_pid_stat($pid); | |
170 | return $info ? $info->{starttime} : 0; | |
e143e9d8 DM |
171 | } |
172 | ||
173 | sub read_meminfo { | |
174 | ||
175 | my $res = { | |
176 | memtotal => 0, | |
177 | memfree => 0, | |
178 | memused => 0, | |
a01c5465 | 179 | memshared => 0, |
e143e9d8 DM |
180 | swaptotal => 0, |
181 | swapfree => 0, | |
182 | swapused => 0, | |
183 | }; | |
184 | ||
185 | my $fh = IO::File->new ("/proc/meminfo", "r"); | |
186 | return $res if !$fh; | |
187 | ||
188 | my $d = {}; | |
189 | while (my $line = <$fh>) { | |
190 | if ($line =~ m/^(\S+):\s+(\d+)\s*kB/i) { | |
191 | $d->{lc ($1)} = $2 * 1024; | |
192 | } | |
193 | } | |
194 | close($fh); | |
195 | ||
196 | $res->{memtotal} = $d->{memtotal}; | |
197 | $res->{memfree} = $d->{memfree} + $d->{buffers} + $d->{cached}; | |
198 | $res->{memused} = $res->{memtotal} - $res->{memfree}; | |
199 | ||
200 | $res->{swaptotal} = $d->{swaptotal}; | |
201 | $res->{swapfree} = $d->{swapfree}; | |
202 | $res->{swapused} = $res->{swaptotal} - $res->{swapfree}; | |
203 | ||
a01c5465 DM |
204 | my $spages = PVE::Tools::file_read_firstline("/sys/kernel/mm/ksm/pages_sharing"); |
205 | $res->{memshared} = int($spages) * 4096; | |
206 | ||
e143e9d8 DM |
207 | return $res; |
208 | } | |
209 | ||
210 | # memory usage of current process | |
211 | sub read_memory_usage { | |
212 | ||
213 | my $res = { size => 0, resident => 0, shared => 0 }; | |
214 | ||
215 | my $ps = 4096; | |
216 | ||
217 | my $line = PVE::Tools::file_read_firstline("/proc/$$/statm"); | |
218 | ||
845f01b6 | 219 | if ($line =~ m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*/) { |
e143e9d8 DM |
220 | $res->{size} = $1*$ps; |
221 | $res->{resident} = $2*$ps; | |
222 | $res->{shared} = $3*$ps; | |
223 | } | |
224 | ||
225 | return $res; | |
226 | } | |
227 | ||
228 | sub read_proc_net_dev { | |
229 | ||
230 | my $res = {}; | |
231 | ||
232 | my $fh = IO::File->new ("/proc/net/dev", "r"); | |
233 | return $res if !$fh; | |
234 | ||
235 | while (defined (my $line = <$fh>)) { | |
236 | if ($line =~ m/^\s*(.*):\s*(\d+)\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+(\d+)\s+/) { | |
237 | $res->{$1} = { | |
238 | receive => $2, | |
239 | transmit => $3, | |
240 | }; | |
241 | } | |
242 | } | |
243 | ||
244 | close($fh); | |
245 | ||
246 | return $res; | |
247 | } | |
248 | ||
249 | 1; |