sof-gossip-tuning

Typed gossip and ingest tuning presets for SOF hosts.

This crate does two things:

1. models the subset of tuning SOF can already apply directly
2. keeps bundled gossip queue capacities explicit and typed

Its structure follows the same split used elsewhere in SOF: domain types and preset values live in the domain layer, while the application service projects those profiles into SOF's runtime builder through an explicit output port.

What SOF Can Apply Today

• ingest queue mode
• ingest queue capacity
• UDP batch size
• UDP batch coalesce window
• receiver pin-by-port / fixed receiver core
• TVU receive socket count
• gossip receiver / socket-consume / response channel capacities

Use it with sof::runtime::RuntimeSetup:

use sof_gossip_tuning::{GossipTuningProfile, HostProfilePreset};

let setup = sof::runtime::RuntimeSetup::new()
    .with_gossip_tuning_profile(GossipTuningProfile::preset(HostProfilePreset::Vps));

Built-in presets:

• Home: bounded ingest and conservative socket fanout for small self-hosted machines
• Vps: lockfree ingest, moderate gossip queue targets, and dual-socket fanout for constrained public hosts
• Dedicated: aggressive fanout and larger queue budgets for dedicated ingest machines

Queue Plans

PendingGossipQueuePlan remains available as a compact view of the gossip queue budget:

• gossip receiver channel capacity
• socket consume channel capacity
• gossip response channel capacity
• high-level fanout posture

Fuzzing

The crate includes a dedicated fuzz target for profile projection through the runtime tuning port:

cargo +nightly fuzz run profile_runtime_port