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//
// Initial port performed by Greg Onufer (exodus@cheers.bungi.com)
//
#include "loadmeter.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <iostream>
#ifdef NO_GETLOADAVG
#ifndef FSCALE
#define FSCALE (1<<8)
#endif
#else
#include <sys/loadavg.h>
#endif
LoadMeter::LoadMeter(XOSView *parent, kstat_ctl_t *_kc)
: FieldMeterGraph(parent, 2, "LOAD", "PROCS/MIN", 1, 1, 0)
{
kc = _kc;
cpulist = KStatList::getList(kc, KStatList::CPU_INFO);
#ifdef NO_GETLOADAVG
ksp = kstat_lookup(kc, "unix", 0, "system_misc");
if (ksp == NULL) {
parent_->done(1);
return;
}
#endif
total_ = -1;
lastalarmstate = -1;
old_cpu_speed = cur_cpu_speed = 0;
}
LoadMeter::~LoadMeter(void)
{
}
void LoadMeter::checkResources(void)
{
FieldMeterGraph::checkResources();
warnloadcol = parent_->allocColor(parent_->getResource("loadWarnColor"));
procloadcol = parent_->allocColor(parent_->getResource("loadProcColor"));
critloadcol = parent_->allocColor(parent_->getResource("loadCritColor"));
setfieldcolor(0, procloadcol);
setfieldcolor(1, parent_->getResource("loadIdleColor"));
priority_ = atoi (parent_->getResource("loadPriority"));
dodecay_ = parent_->isResourceTrue("loadDecay");
useGraph_ = parent_->isResourceTrue("loadGraph");
SetUsedFormat(parent_->getResource("loadUsedFormat"));
do_cpu_speed = parent_->isResourceTrue("loadCpuSpeed");
const char *warn = parent_->getResource("loadWarnThreshold");
if (strncmp(warn, "auto", 2) == 0)
warnThreshold = sysconf(_SC_NPROCESSORS_ONLN);
else
warnThreshold = atoi(warn);
const char *crit = parent_->getResource("loadCritThreshold");
if (strncmp(crit, "auto", 2) == 0)
critThreshold = warnThreshold * 4;
else
critThreshold = atoi(crit);
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)
{
int alarmstate;
#ifdef NO_GETLOADAVG
// This code is mainly for Solaris 6 and earlier, but should work on
// any version.
kstat_named_t *k;
if (kstat_read(kc, ksp, NULL) == -1) {
parent_->done(1);
return;
}
k = (kstat_named_t *)kstat_data_lookup(ksp, "avenrun_1min");
if (k == NULL) {
parent_->done(1);
return;
}
fields_[0] = kstat_to_double(k) / FSCALE;
#else
// getloadavg() if found on Solaris 7 and newer.
getloadavg(&fields_[0], 1);
#endif
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] = total_ - fields_[0];
setUsed(fields_[0], total_);
}
void LoadMeter::getspeedinfo(void)
{
unsigned int total_mhz = 0, i = 0;
kstat_named_t *k;
kstat_t *cpu;
cpulist->update(kc);
for (i = 0; i < cpulist->count(); i++) {
cpu = (*cpulist)[i];
if (kstat_read(kc, cpu, NULL) == -1) {
parent_->done(1);
return;
}
// Try current_clock_Hz first (needs frequency scaling support),
// then clock_MHz.
k = (kstat_named_t *)kstat_data_lookup(cpu, "current_clock_Hz");
if (k == NULL) {
k = (kstat_named_t *)kstat_data_lookup(cpu, "clock_MHz");
if (k == NULL) {
std::cerr << "CPU speed is not available." << std::endl;
parent_->done(1);
return;
}
XOSDEBUG("Speed of cpu %d is %lld MHz\n", i, kstat_to_ui64(k));
total_mhz += kstat_to_ui64(k);
}
else {
XOSDEBUG("Speed of cpu %d is %lld Hz\n", i, kstat_to_ui64(k));
total_mhz += ( kstat_to_ui64(k) / 1000000 );
}
}
old_cpu_speed = cur_cpu_speed;
cur_cpu_speed = ( i > 0 ? total_mhz / i : 0 );
}
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