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//
// Copyright (c) 1994, 1995, 2006, 2008 by Mike Romberg ( mike.romberg@noaa.gov )
//
// This file may be distributed under terms of the GPL
//
// Most of this code was written by Werner Fink <werner@suse.de>.
// Only small changes were made on my part (M.R.)
//
#include "loadmeter.h"
#include "cpumeter.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fstream>
#include <iostream>
#include <string>
static const char LOADFILENAME[] = "/proc/loadavg";
static const char SPEEDFILENAME[] = "/proc/cpuinfo";
LoadMeter::LoadMeter( XOSView *parent )
: FieldMeterGraph( parent, 2, "LOAD", "PROCS/MIN", 1, 1, 0 ){
lastalarmstate = -1;
total_ = 2.0;
old_cpu_speed_= cur_cpu_speed_=0;
do_cpu_speed = 0;
}
LoadMeter::~LoadMeter( void ){
}
void LoadMeter::checkResources( void ){
FieldMeterGraph::checkResources();
procloadcol_ = parent_->allocColor(parent_->getResource( "loadProcColor" ));
warnloadcol_ = parent_->allocColor(parent_->getResource( "loadWarnColor" ));
critloadcol_ = parent_->allocColor(parent_->getResource( "loadCritColor" ));
setfieldcolor( 0, procloadcol_ );
setfieldcolor( 1, parent_->getResource( "loadIdleColor" ) );
priority_ = atoi (parent_->getResource( "loadPriority" ) );
useGraph_ = parent_->isResourceTrue( "loadGraph" );
dodecay_ = parent_->isResourceTrue( "loadDecay" );
SetUsedFormat (parent_->getResource("loadUsedFormat"));
const char *warn = parent_->getResource("loadWarnThreshold");
if (strncmp(warn, "auto", 2) == 0) {
warnThreshold = CPUMeter::countCPUs();
} else {
warnThreshold = atoi(warn);
}
const char *crit = parent_->getResource("loadCritThreshold");
if (strncmp(crit, "auto", 2) == 0) {
critThreshold = warnThreshold * 4;
} else {
critThreshold = atoi(crit);
}
do_cpu_speed = parent_->isResourceTrue( "loadCpuSpeed" );
if (dodecay_){
// Warning: Since the loadmeter changes scale occasionally, old
// decay values need to be rescaled. However, if they are rescaled,
// they could go off the edge of the screen. Thus, for now, to
// prevent this whole problem, the load meter can not be a decay
// meter. The load is a decaying average kind of thing anyway,
// so having a decaying load average is redundant.
std::cerr << "Warning: The loadmeter can not be configured as a decay\n"
<< " meter. See the source code (" << __FILE__ << ") for further\n"
<< " details.\n";
dodecay_ = 0;
}
}
void LoadMeter::checkevent( void ){
getloadinfo();
if ( do_cpu_speed ) {
getspeedinfo();
if ( old_cpu_speed_ != cur_cpu_speed_ ) {
// update the legend:
char l[32];
snprintf(l, 32, "PROCS/MIN %d MHz", cur_cpu_speed_);
legend(l);
drawlegend();
}
}
drawfields();
}
void LoadMeter::getloadinfo( void ){
std::ifstream loadinfo( LOADFILENAME );
if ( !loadinfo ){
std::cerr <<"Can not open file : " <<LOADFILENAME << std::endl;
parent_->done(1);
return;
}
loadinfo >> fields_[0];
if ( fields_[0] < warnThreshold ) alarmstate = 0;
else
if ( fields_[0] >= critThreshold ) alarmstate = 2;
else
/* if fields_[0] >= warnThreshold */ alarmstate = 1;
if ( alarmstate != lastalarmstate ){
if ( alarmstate == 0 ) setfieldcolor( 0, procloadcol_ );
else
if ( alarmstate == 1 ) setfieldcolor( 0, warnloadcol_ );
else
/* if alarmstate == 2 */ setfieldcolor( 0, critloadcol_ );
drawlegend();
lastalarmstate = alarmstate;
}
// Adjust total to next power-of-two of the current load.
if ( (fields_[0]*5.0 < total_ && total_ > 1.0) || fields_[0] > total_ ) {
unsigned int i = fields_[0];
i |= i >> 1; i |= i >> 2; i |= i >> 4; i |= i >> 8; i |= i >> 16; // i = 2^n - 1
total_ = i + 1;
}
fields_[1] = (float) (total_ - fields_[0]);
setUsed(fields_[0], (float) 1.0);
}
// just check /proc/cpuinfo for the speed of cpu
// (average multi-cpus on different speeds)
// (yes - i know about devices/system/cpu/cpu*/cpufreq )
void LoadMeter::getspeedinfo( void ){
std::ifstream speedinfo(SPEEDFILENAME);
std::string line, val;
unsigned int total_cpu = 0, ncpus = 0;
while ( speedinfo.good() ) {
std::getline(speedinfo, line);
if ( strncmp(line.c_str(), "cpu MHz", 7) == 0 ) {
val = line.substr(line.find_last_of(':') + 1);
XOSDEBUG("SPEED: %s\n", val.c_str());
total_cpu += atoi(val.c_str());
ncpus++;
}
}
old_cpu_speed_ = cur_cpu_speed_;
if (ncpus > 0)
cur_cpu_speed_ = total_cpu / ncpus;
else
cur_cpu_speed_ = 0;
}
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