F-Stack/f-stack

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

4254 stars · 962 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

F-Stack is an open-source high-performance user-space network framework based on DPDK, featuring a ported FreeBSD 11 TCP/IP stack, a Posix-like socket/epoll/kqueue API, and a coroutine SDK. It enables kernel-bypass networking for applications like Nginx and Redis, achieving millions of concurrent connections and RPS.

Use cases

• build a high-performance HTTP server that bypasses the Linux kernel
• run Redis or Nginx with DPDK kernel-bypass networking
• handle millions of concurrent TCP connections on 10G+ NICs
• port an existing epoll-based C application to user-space networking
• implement a high-QPS DNS or proxy server
• avoid kernel packet copying, syscalls, and interrupt overhead

When to choose

• you need maximum packet throughput or connection density beyond what the Linux kernel delivers
• you have existing epoll/kqueue or socket-based C applications you want to accelerate
• you can dedicate NICs to DPDK and deploy on bare metal Linux servers

When to avoid

• your workload is low-traffic or not network-bound
• you need kernel features like netfilter, routing daemons, or standard tooling on the accelerated NIC
• you cannot control the deployment environment (e.g., shared cloud VMs without DPDK-capable NICs)
• your stack is in a language other than C/C++ without binding effort

Facets

framework · maturity stable

networking http-server concurrency developer-tools networking performance backend microservices c cpp dpdk kernel-bypass freebsd-tcpip user-space-network-stack high-performance coroutines epoll kqueue nginx redis linux

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