]>
git.proxmox.com Git - pve-common.git/blob - data/PVE/ProcFSTools.pm
1 package PVE
::ProcFSTools
;
6 use Time
::HiRes qw
(gettimeofday
);
10 my $clock_ticks = POSIX
::sysconf
(&POSIX
::_SC_CLK_TCK
);
15 my $fn = '/proc/cpuinfo';
17 return $cpuinfo if $cpuinfo;
20 user_hz
=> $clock_ticks,
27 my $fh = IO
::File-
>new ($fn, "r");
32 while (defined(my $line = <$fh>)) {
33 if ($line =~ m/^processor\s*:\s*\d+\s*$/i) {
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
};
39 } elsif ($line =~ m/^flags\s*:.*(vmx|svm)/) {
40 $res->{hvm
} = 1; # Hardware Virtual Machine (Intel VT / AMD-V)
41 } elsif ($line =~ m/^physical id\s*:\s*(\d+)\s*$/i) {
46 $res->{sockets
} = scalar(keys %$idhash) || 1;
48 $res->{cpus
} = $count;
57 sub read_proc_uptime
{
60 my $line = PVE
::Tools
::file_read_firstline
("/proc/uptime");
61 if ($line && $line =~ m
|^(\d
+\
.\d
+)\s
+(\d
+\
.\d
+)\s
*$|) {
63 return (int($1*$clock_ticks), int($2*$clock_ticks));
65 return (int($1), int($2));
74 my $line = PVE
::Tools
::file_read_firstline
('/proc/loadavg');
76 if ($line =~ m
|^(\d
+\
.\d
+)\s
+(\d
+\
.\d
+)\s
+(\d
+\
.\d
+)\s
+\d
+/\d
+\s
+\d
+\s
*$|) {
77 return wantarray ?
($1, $2, $3) : $1;
80 return wantarray ?
(0, 0, 0) : 0;
86 my $res = { user
=> 0, nice
=> 0, system => 0, idle
=> 0 , sum
=> 0};
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
|) {
97 $res->{used
} = $1+$2+$3;
99 } elsif ($line =~ m
|^cpu\d
+\s
|) {
106 $cpucount = 1 if !$cpucount;
108 my $ctime = gettimeofday
; # floating point time in seconds
110 $res->{ctime
} = $ctime;
114 $last_proc_stat = $res if !$last_proc_stat;
116 my $diff = ($ctime - $last_proc_stat->{ctime
}) * $clock_ticks * $cpucount;
118 if ($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;
127 $res->{cpu
} = $last_proc_stat->{cpu
};
128 $res->{wait} = $last_proc_stat->{wait};
134 sub read_proc_pid_stat
{
137 my $statstr = PVE
::Tools
::file_read_firstline
("/proc/$pid/stat");
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+/) {
153 sub check_process_running
{
154 my ($pid, $pstart) = @_;
156 # note: waitpid only work for child processes, but not
157 # for processes spanned by other processes.
158 # kill(0, pid) return succes for zombies.
159 # So we read the status form /proc/$pid/stat instead
161 my $info = read_proc_pid_stat
($pid);
163 return $info && (!$pstart || ($info->{starttime
} eq $pstart)) && ($info->{status
} ne 'Z') ?
$info : undef;
166 sub read_proc_starttime
{
169 my $info = read_proc_pid_stat
($pid);
170 return $info ?
$info->{starttime
} : 0;
185 my $fh = IO
::File-
>new ("/proc/meminfo", "r");
189 while (my $line = <$fh>) {
190 if ($line =~ m/^(\S+):\s+(\d+)\s*kB/i) {
191 $d->{lc ($1)} = $2 * 1024;
196 $res->{memtotal
} = $d->{memtotal
};
197 $res->{memfree
} = $d->{memfree
} + $d->{buffers
} + $d->{cached
};
198 $res->{memused
} = $res->{memtotal
} - $res->{memfree
};
200 $res->{swaptotal
} = $d->{swaptotal
};
201 $res->{swapfree
} = $d->{swapfree
};
202 $res->{swapused
} = $res->{swaptotal
} - $res->{swapfree
};
204 my $spages = PVE
::Tools
::file_read_firstline
("/sys/kernel/mm/ksm/pages_sharing");
205 $res->{memshared
} = int($spages) * 4096;
210 # memory usage of current process
211 sub read_memory_usage
{
213 my $res = { size
=> 0, resident
=> 0, shared
=> 0 };
217 my $line = PVE
::Tools
::file_read_firstline
("/proc/$$/statm");
219 if ($line =~ m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s*/) {
220 $res->{size
} = $1*$ps;
221 $res->{resident
} = $2*$ps;
222 $res->{shared
} = $3*$ps;
228 sub read_proc_net_dev
{
232 my $fh = IO
::File-
>new ("/proc/net/dev", "r");
235 while (defined (my $line = <$fh>)) {
236 if ($line =~ m/^\s*(.*):\s*(\d+)\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+\d+\s+(\d+)\s+/) {
249 sub write_proc_entry
{
250 my ($filename, $data) = @_;#
252 my $fh = IO
::File-
>new($filename, O_WRONLY
);
253 die "unable to open file '$filename' - $!\n" if !$fh;
254 die "unable to write '$filename' - $!\n" unless print $fh $data;
255 die "closing file '$filename' failed - $!\n" unless close $fh;