A highly scalable user-level TCP stack designed for multicore systems, enabling high-performance network applications.
mTCP is a user-level TCP stack designed to achieve high scalability on multicore systems. It bypasses the kernel's network stack to reduce overhead and improve packet processing performance. The project solves the problem of kernel bottlenecks in high-speed networking applications by providing a portable, efficient alternative.
Network engineers and developers building high-performance servers, network function virtualization (NFV) applications, or any system requiring extreme TCP connection scalability and low latency.
Developers choose mTCP for its proven multicore scalability, integration with multiple high-speed I/O engines like DPDK, and the ability to fine-tune network performance without kernel modifications.
mTCP: A Highly Scalable User-level TCP Stack for Multicore Systems
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Efficiently distributes TCP connections across CPU cores using RSS queues, enabling handling of millions of concurrent connections as demonstrated in high-performance web server use cases.
Integrates with multiple high-speed backends like DPDK, PSIO, and NETMAP, allowing optimization for different hardware setups and performance goals based on the provided installation guides.
Operates entirely in user space to bypass kernel overhead, providing fine-grained control over packet processing and optional CCP congestion control for advanced traffic management.
Includes modified versions of Lighttpd and Apache Benchmark, offering ready-to-use examples for benchmarking and deployment in practical scenarios.
Requires multiple steps such as driver installations, hugepage setup, and environment variable configuration, which are error-prone and documented across separate guides for each I/O engine.
Only compatible with specific NICs (e.g., Intel 82599) and older Linux kernels for PSIO, restricting deployment flexibility and necessitating careful hardware selection as noted in the tested environments.
Uses fixed memory pools for buffers, supports a limited subset of socket options, and has experimental CCP integration, which may not meet the needs of all applications without additional work.