⚡ Concurrency & Parallelism

Threads • Locks • Atomic • Channels • Actors • Async • CSP • Data‑Parallel

Master the art of simultaneous execution — from shared‑memory multithreading to message‑passing and distributed systems.

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Concurrency Concepts & Patterns

Beginner

🔄

Processes vs. Threads

Processes, threads, context switching, memory model.

Race Conditions

Shared state, critical sections, data races.

Mutex & Locking

Exclusive locks, lock/unlock, recursive mutex.

Semaphores

Counting semaphores, binary semaphores, Dijkstra.

Condition Variables

Wait, signal, broadcast, producer‑consumer.

Read‑Write Locks

Shared/exclusive access, reader‑writer priority.

Lock‑Free & Wait‑Free

CAS, atomic operations, ABA problem, hazard pointers.

Shared‑Memory Model

Threads, locks, visibility, volatile, happens‑before.

Model

Intermediate

📨

Message Passing (CSP)

Channels, goroutines, select, Hoare's CSP.

Model

Advanced

🎭

Actor Model

Actors, mailboxes, supervision, Erlang/Akka.

Model

Advanced

🧾

Software Transactional Memory

Atomic transactions, retry, compose, Haskell STM.

Model

Intermediate

☕

Java Concurrency

synchronized, volatile, Executors, ConcurrentHashMap.

Python Concurrency

threading, asyncio, GIL, multiprocessing, trio.

Go Concurrency

goroutines, channels, select, sync package.

Language

Advanced

🦀

Rust Concurrency & Safety

Send/Sync, Arc, Mutex, async/await, fearless concurrency.

Producer‑Consumer

Bounded buffer, blocking queue, multiple producers/consumers.

Pattern

Intermediate

📚

Readers‑Writers

Shared data, multiple readers, exclusive writers.

Pattern

Advanced

🏊

Thread Pool

Worker threads, task queue, saturation policy.

Pattern

Advanced

🔮

Future / Promise

Async results, chaining, completion stage, non‑blocking.

Pattern

Advanced

🌀

Reactor / Event Loop

Event demultiplexing, non‑blocking I/O, Netty.

Pattern

Expert

📜

Saga Pattern

Distributed transactions, compensation, orchestration.

Parallel Map / Reduce

Data parallelism, divide & conquer, MapReduce.

Parallel Prefix (Scan)

Associative operations, work‑efficient, GPU.

Parallel Sorting

Bitonic sort, sample sort, radix sort on GPU.

Distributed Consensus

Paxos, Raft, leader election, replicated logs.

CRDTs (Conflict‑free Replicated)

State‑based, operation‑based, convergent replication.

Distributed Transactions

2PC, 3PC, TCC, distributed ACID.

Debugging Concurrency

TSAN, Helgrind, record‑replay, data‑race detection.

CUDA / GPU Concurrency

Kernels, threads, blocks, memory hierarchy, warp.

Dining Philosophers

Deadlock, resource allocation, Chandy‑Misra.

Sleeping Barber

Semaphore solution, queue, wake‑up logic.

Readers‑Writers Problem

Priority variants, starvation, solution.

Classic

Problems

⚡ Concurrency Mastery Roadmap

🔰 Foundation

Processes, threads, race, mutex, semaphores

📶 Core

Cond vars, RWLock, thread pools, channels, actors

🔥 Deep Dive

Lock‑free, STM, CSP, parallel algorithms, GPU

🏆 Distributed

Consensus, CRDTs, sagas, distributed transactions

⚡ Conquer Concurrency — Build Scalable Systems

Interactive visualizations, code examples, and real‑world patterns.

Back to Home Concurrency Services

⚡ Concurrency & Parallelism

Processes vs. Threads

Race Conditions

Mutex & Locking

Semaphores

Condition Variables

Read‑Write Locks

Lock‑Free & Wait‑Free

Shared‑Memory Model

Message Passing (CSP)

Actor Model

Software Transactional Memory

Java Concurrency

Python Concurrency

Go Concurrency

Rust Concurrency & Safety

Producer‑Consumer

Readers‑Writers

Thread Pool

Future / Promise

Reactor / Event Loop

Saga Pattern

Parallel Map / Reduce

Parallel Prefix (Scan)

Parallel Sorting

Distributed Consensus

CRDTs (Conflict‑free Replicated)

Distributed Transactions

Debugging Concurrency

CUDA / GPU Concurrency

Dining Philosophers

Sleeping Barber

Readers‑Writers Problem

⚡ Concurrency Mastery Roadmap

Related Computer Science Domains

⚡ Conquer Concurrency — Build Scalable Systems