The weighting is actually quadratic; i.e., when the job is half done
the estimate is 75% from the dynamic and 25% from the static.
However, I think I see a serious bug in the code (see below).
Anyone else see it?
-- David
// Returns the estimated CPU time to completion (in seconds) of this task.
// Compute this as a weighted average of estimates based on
// 1) the workunit's flops count
// 2) the current reported CPU time and fraction done
//
double ACTIVE_TASK::est_time_to_completion(bool for_work_fetch) {
if (fraction_done >= 1) return 0;
double wu_est = result->estimated_duration(for_work_fetch);
if (fraction_done <= 0) return wu_est;
double frac_est = (elapsed_time / fraction_done) - elapsed_time;
double fraction_left = 1-fraction_done;
double wu_weight = fraction_left * fraction_left;
double fd_weight = 1 - wu_weight;
double x = fd_weight*frac_est + wu_weight*fraction_left*wu_est;
return x;
}
double RESULT::estimated_duration(bool) {
return
estimated_duration_uncorrected()*project->duration_correction_factor;
}
double RESULT::estimated_duration_uncorrected() {
return wup->rsc_fpops_est/avp->flops;
}
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