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# -*-Perl-*-
# instances allowed: one
# (single instance modules would be silly to use more than one of
# anyway, so we use package local storage. This is faster and places
# less artificial load on the machine than doing everything through
# the object hash)
package MGMmodule::cpustat;
use vars qw($numcpus $statcpus $xpath $graph @load @total @prevload
@prevtotal $widget $lastmod);
# class init
sub module_init{
my$this=shift;
my$xclass=$this->{"xclass"};
# how many CPUs? Get this from /proc/cpuinfo then /proc/stat.
# /proc/stat only sees multiple CPUs as of late 2.1, but we
# at least want to mark the single bar as SMP under 2.0
$numcpus=0;
$statcpus=0;
if(open(PROC,"</proc/cpuinfo")){
while(<PROC>){
if(m/processor\s*:\s*(\d*)/){
$numcpus=$1+1 if ($numcpus<$1+1);
}
}
close PROC;
# now check /proc/stat to see how many cpus it reports
$this->read_proc;
}else{
$this->{"toplevel"}->optionAdd("$xclass.active",0,21);
}
$this->{"toplevel"}->optionAdd("$xclass.order", 1,21);
$this;
}
# instance init
sub module_instance{
my$this=shift;
my$toplevel=$this->{"toplevel"};
return undef if(defined($xpath));
$xpath=$this->{"xpath"};
($minx,$miny)=MGM::Graph::calcxysize($this,100,'%',$statcpus);
if($numcpus>1 && $statcpus==1){
$toplevel->optionAdd("$xpath.bar.0.label", "cpus 0-".($numcpus-1),22);
}else{
for(my$i=0;$i<$numcpus;$i++){
$toplevel->optionAdd("$xpath.bar.$i.label", "cpu$i",22);
}
}
$toplevel->optionAdd("$xpath.scalerefresh", 500,21); # faster
$toplevel->optionAdd("$xpath.scalewidadj", 100*$statcpus,21);
$toplevel->optionAdd("$xpath.scalelenadj", 100,21);
$toplevel->optionAdd("$xpath.minx", $minx,21);
$toplevel->optionAdd("$xpath.miny", $miny,21);
$this;
}
# instance widget build
sub module_run{
my($this)=@_;
$graph=MGM::Graph->new($this,num=>$statcpus,fixed=>'1',
prompt=>"%",rangecurrent=>100,rangesetting=>'100');
$lastmod=-1;
$widget=$graph->{"widget"}; # must return widget
}
sub module_update{
my$this=shift;
if($lastmod!=$MGMmodule::helperST::lastmod){
# don't update unless the helper has
$lastmod=$MGMmodule::helperST::lastmod;
$this->read_proc;
if(defined(@prevload)){
my@vals;
if($statcpus==1){
my$tot=$total[0]-$prevtotal[0];
if($tot>0){
$vals[0]=100*($load[0]-$prevload[0])/$tot;
$vals[0]=100 if $vals[0]>100;
}else{
$vals[0]=0;
}
}else{
for(my$i=0;$i<$numcpus;$i++){
my$use=$i+1;
my$tot=$total[$use]-$prevtotal[$use];
if($tot>0){
$vals[$i]=100*($load[$use]-$prevload[$use])/$tot;
$vals[$i]=100 if $vals[$i]>100;
}else{
$vals[$i]=0;
}
}
}
$graph->set(@vals);
}
@prevload=@load;
@prevtotal=@total;
}
}
sub read_proc{
# now uses the 00helper to save on opens
# in late 2.1+ kernels, each CPU has an entry in /proc/stat along with
# a common entry. Earlier, only the common entry.
# collective cpu entry
$MGMmodule::helperST::proc{"cpu"}=~m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/;
$load[0]=$1+$2+$3;
$total[0]=$load[0]+$4;
for(my$i=0;defined(my$line=$MGMmodule::helperST::proc{"cpu$i"});$i++){
$line=~m/^(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/;
# per-cpu entry
$total[$i+1]=($load[$i+1]=$1+$2+$3)+$4;
$statcpus=$i+1 if($i+1>$statcpus);
}
}
bless {};
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