What is DPDK
DPDK (Data Plane Development Kit) is a set of libraries and drivers for accelerated network packet processing in user space. The technology allows applications to work directly with network adapters, bypassing the standard Linux kernel network stack.
DPDK is used in DPI systems, NFV platforms, virtual routers, and 5G networks where minimal latency and high throughput are critical.
How DPDK Works
Standard traffic processing goes through the operating system kernel, which creates additional context switches and increases latency. Under heavy traffic loads, this consumes significant resources.
DPDK moves packet processing to user space using specialized PMD drivers. Instead of waiting for interrupts from the network card, these drivers continuously poll it and immediately collect new packets.
The network card transfers data to memory via DMA, without unnecessary copying through the processor. For packet storage, DPDK uses huge pages — large memory pages that enable faster access under heavy load.
This approach reduces the load on the OS kernel and allows millions of packets per second to be processed on a single server.
DPDK Architecture
The core of DPDK consists of:
- PMD drivers for working with network cards;
- memory pools for packet storage;
- lockless queues;
- load distribution mechanisms across CPU cores.
Traffic is processed in parallel by multiple threads, which is especially important for high-load telecom platforms.
Advantages of DPDK
The main advantage of DPDK is high performance. The technology reduces latency and increases throughput compared to standard packet processing through the kernel network stack.
DPDK is well suited for:
- DPI;
- CG-NAT;
- virtual routers;
- BNG;
- telecom infrastructure;
- edge services.
Where DPDK Is Used
The technology is often deployed where a single server must handle tens of gigabits of traffic without specialized hardware acceleration.
DPDK is particularly useful when a single server needs to pass tens of gigabits of traffic while maintaining low latency — for example, when an operator migrates network functions from dedicated equipment to standard x86 servers.
DPDK is widely used in NFV and cloud-native infrastructure. It is also supported by networking projects and platforms such as Open vSwitch, VPP, and FD.io, which use it to more quickly receive, process, and forward packets between virtual machines, containers, and physical interfaces.
