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//
// Copyright (c) 1996, 2004 by Massimiliano Ghilardi ( ghilardi@cibs.sns.it )
//
// This file may be distributed under terms of the GPL
//
#include "pagemeter.h"
#include "xosview.h"
#include <fstream>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#define MAX_PROCSTAT_LENGTH 4096
PageMeter::PageMeter( XOSView *parent, float max )
: FieldMeterGraph( parent, 3, "PAGE", "IN/OUT/IDLE" ),
_vmstat(false), _statFileName("/proc/stat"){
for ( int i = 0 ; i < 2 ; i++ )
for ( int j = 0 ; j < 2 ; j++ )
pageinfo_[j][i] = 0;
maxspeed_ = max;
pageindex_ = 0;
struct stat buf;
if (stat("/proc/vmstat", &buf) == 0
&& buf.st_mode & S_IFREG)
{
_vmstat = true;
_statFileName = "/proc/vmstat";
}
}
PageMeter::~PageMeter( void ){
}
void PageMeter::checkResources( void ){
FieldMeterGraph::checkResources();
setfieldcolor( 0, parent_->getResource( "pageInColor" ) );
setfieldcolor( 1, parent_->getResource( "pageOutColor" ) );
setfieldcolor( 2, parent_->getResource( "pageIdleColor" ) );
priority_ = atoi (parent_->getResource( "pagePriority" ) );
maxspeed_ *= priority_ / 10.0;
dodecay_ = parent_->isResourceTrue( "pageDecay" );
useGraph_ = parent_->isResourceTrue( "pageGraph" );
SetUsedFormat (parent_->getResource("pageUsedFormat"));
}
void PageMeter::checkevent( void ){
if (_vmstat)
getvmpageinfo();
else
getpageinfo();
drawfields();
}
void PageMeter::updateinfo(void)
{
int oldindex = (pageindex_+1)%2;
for ( int i = 0; i < 2; i++ )
{
if ( pageinfo_[oldindex][i] == 0 )
pageinfo_[oldindex][i] = pageinfo_[pageindex_][i];
fields_[i] = pageinfo_[pageindex_][i] - pageinfo_[oldindex][i];
total_ += fields_[i];
}
if ( total_ > maxspeed_ )
fields_[2] = 0.0;
else
{
fields_[2] = maxspeed_ - total_;
total_ = maxspeed_;
}
setUsed (total_ - fields_[2], maxspeed_);
pageindex_ = (pageindex_ + 1) % 2;
}
void PageMeter::getvmpageinfo(void)
{
total_ = 0;
char buf[MAX_PROCSTAT_LENGTH];
bool found_in = false, found_out = false;
std::ifstream stats(_statFileName);
if (!stats)
{
std::cerr <<"Cannot open file : " << _statFileName << std::endl;
exit(1);
}
while (!stats.eof() && !(found_in && found_out))
{
stats.getline(buf, MAX_PROCSTAT_LENGTH);
if (!strncmp(buf, "pswpin", 6))
{
pageinfo_[pageindex_][0] = strtoul(buf+7, NULL, 10);
found_in = true;
}
if (!strncmp(buf, "pswpout", 7))
{
pageinfo_[pageindex_][1] = strtoul(buf+8, NULL, 10);
found_out = true;
}
}
updateinfo();
}
void PageMeter::getpageinfo( void ){
total_ = 0;
char buf[MAX_PROCSTAT_LENGTH];
std::ifstream stats(_statFileName);
if ( !stats ){
std::cerr <<"Cannot open file : " << _statFileName << std::endl;
exit( 1 );
}
do {
stats >>buf;
} while (!stats.eof() && strncasecmp(buf, "swap", 5));
stats >>pageinfo_[pageindex_][0] >>pageinfo_[pageindex_][1];
updateinfo();
}
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