CPU.loadAvg = function() {
CPU.last.walltime = proc.gettimeofday();
CPU.last.systime = proc.getsystime();
CPU.last.usertime = proc.getusertime();
// add a single sample
var o = {
at: CPU.last.walltime,
walltime: CPU.last.walltime,
systime: CPU.last.systime,
usertime: CPU.last.usertime,
};
CPU.samples.push(o);
// collect the min and max times over 1, 5 and 10 s
var max = o;
var min = o;
// get samples
CPU.samples = CPU.samples.filter(function(s) {
// microsecond = 1000 milliseconds, and 1000 milliseconds = 1 second
// only min can change, since samples are from the past
if( s.at < min.at ) {
min = s;
}
// remove values older than 100 ms
return (s.at > CPU.last.walltime - SAMPLE_SPEED * 10 * 1000);
});
var result = CPU.calcUsage(min, max);
CPU.load = result.percentage;
};
CPU.getCPU = function() {
return {
real: proc.gettimeofday(),
user: proc.getsystime(),
sys: proc.getusertime(),
percentage: CPU.load,
}
};