Method validate

nodedb/src/config/engine.rs:117–136

Validate that every fraction is positive and finite and that they sum to no more than the whole. Every engine must get a strictly-positive budget: a zero budget is reported by the governor as 100% utilization → Emergency pressure, which rejects writes to that engine with `resources exhausted`.

(&self)

    /// reported by the governor as 100% utilization → Emergency pressure,
    /// which rejects writes to that engine with `resources exhausted`.
    pub fn validate(&self) -> crate::Result<()> {
        for &engine in EngineId::ALL {
            let f = self.fraction_for(engine);
            if !f.is_finite() || f <= 0.0 {
                return Err(crate::Error::Config {
                    detail: format!(
                        "engine budget fraction for {engine} must be a positive finite \
                         number, got {f}"
                    ),
                });
            }
        }
        let total = self.total_fraction();
        if total > 1.0 {
            return Err(crate::Error::Config {
                detail: format!("engine budget fractions sum to {total:.3}, must be <= 1.0"),
            });
        }
        Ok(())
    }

    /// Convert fractions to absolute byte budgets for every `EngineId`,
    /// given the global memory limit.