Enum Distributions 

pub enum Distributions {
    Uniform(Jiffies, Jiffies),
    Bernoulli(f64, Jiffies),
    Normal(Jiffies, Jiffies),
}

Probability distributions for modeling stochastic network behavior.

Distributions provides various probability distributions that can be used to model realistic network characteristics in DScale simulations. Each distribution generates values in Jiffies (simulation time units) and is commonly used for latency modeling, though they can be applied to any stochastic simulation parameter.

Deterministic Randomness

All distributions use the simulation’s deterministic random number generator, ensuring that identical configurations with the same seed produce identical results. This is crucial for reproducible simulation experiments.

Common Applications

• Network Latency: Model variable message delivery times
• Packet Loss: Simulate unreliable network conditions
• Jitter: Add realistic variation to timing
• Failure Models: Probabilistic component failures
• Load Variation: Variable processing times

Usage in Network Configuration

Distributions are primarily used with LatencyDescription to configure network topology characteristics:

use dscale::{SimulationBuilder, LatencyDescription, Distributions, Jiffies};

let simulation = SimulationBuilder::default()
    .add_pool::<MyProcess>("servers", 3)
    .latency_topology(&[
        // Low-latency local network with small variation
        LatencyDescription::WithinPool("servers",
            Distributions::Uniform(Jiffies(1), Jiffies(5))),

        // Internet latency with realistic variation
        LatencyDescription::BetweenPools("clients", "servers",
            Distributions::Normal(Jiffies(100), Jiffies(20))),

        // Unreliable network with 10% packet loss
        LatencyDescription::WithinPool("mobile",
            Distributions::Bernoulli(0.9, Jiffies(50))),
    ])
    .build();

Variants

Uniform(Jiffies, Jiffies)

Bernoulli(f64, Jiffies)

Normal(Jiffies, Jiffies)

Trait Implementations

impl Clone for Distributions

fn clone(&self) -> Distributions

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Distributions