ringkernel-core

Core traits and types for the RingKernel GPU-native actor system.

Overview

This crate provides the foundational abstractions that all RingKernel backends implement. It defines the message passing protocols, kernel lifecycle management, and synchronization primitives.

Core Abstractions

Messages

use ringkernel_core::prelude::*;

// Messages must be serializable for GPU transfer
pub trait RingMessage: Archive + Serialize + Deserialize {
    fn type_id(&self) -> u32;
    fn correlation_id(&self) -> Option<CorrelationId>;
}

Kernel Runtime

#[async_trait]
pub trait RingKernelRuntime: Send + Sync {
    async fn launch(&self, id: &str, options: LaunchOptions) -> Result<KernelHandle>;
    async fn shutdown(&self) -> Result<()>;
    fn is_k2k_enabled(&self) -> bool;
}

Control Block

128-byte GPU-resident structure for kernel lifecycle management:

#[repr(C, align(128))]
pub struct ControlBlock {
    pub is_active: AtomicU32,
    pub should_terminate: AtomicU32,
    pub has_terminated: AtomicU32,
    pub messages_processed: AtomicU64,
    // ... HLC state, queue pointers, etc.
}

Key Components

Component	Description
`RingMessage`	Trait for GPU-transferable messages
`MessageQueue`	Lock-free ring buffer for message passing
`KernelHandle`	Handle to manage kernel lifecycle
`ControlBlock`	GPU-resident kernel state
`HlcTimestamp`	Hybrid Logical Clock for causal ordering
`K2KBroker`	Kernel-to-kernel messaging broker
`PubSubBroker`	Topic-based publish/subscribe

Hybrid Logical Clocks

Provides causal ordering across distributed operations:

use ringkernel_core::hlc::{HlcClock, HlcTimestamp};

let clock = HlcClock::new(node_id);
let ts1 = clock.tick();
let ts2 = clock.tick();
assert!(ts1 < ts2);

// Synchronize with remote timestamp
let synced = clock.update(&remote_ts)?;

Kernel-to-Kernel Messaging

Direct communication between kernels without host involvement:

let broker = K2KBroker::new();
let endpoint = broker.register(kernel_id);
endpoint.send(destination_id, envelope).await?;

Testing

cargo test -p ringkernel-core

The crate includes 65+ tests covering message serialization, queue operations, HLC ordering, and K2K messaging.

License

Apache-2.0

ringkernel-core 0.1.2