ERPC Deploys Solana v4 XDP Fast Path and Zero-Copy Across All Regional Nodes
By extending kernel-bypass networking from a single-region proof-of-concept to all production nodes, ERPC has made a latency optimization that was previously experimental into a baseline feature available to every customer regardless of region.
Reporting from 1 sources: ASCII.jp.
ELSOUL LABO B.V. and Validators DAO announced that ERPC has deployed the Solana v4 (Agave 4.x) XDP fast path and AF_XDP zero-copy optimization to all regional RPC and Geyser gRPC nodes in production. The deployment expands a proof-of-concept previously limited to the New York region to the full infrastructure across all regions. The XDP fast path and AF_XDP zero-copy reduce kernel overhead in the Turbine shred propagation and ingestion path, shortening stream delivery lag for Geyser gRPC and improving state freshness for RPC queries. ERPC applied the optimization to both RPC nodes and Geyser gRPC source nodes. The deployment uses the startup flag system reorganized in Agave 4.1, with per-region configuration. ERPC noted that enabling XDP requires a new kernel, XDP-capable NIC, appropriate systemd capabilities, correct startup flags, and proper CPU core pinning, and that deploying across all regions increased operational difficulty. The operational expertise is consolidated into the open-source Solana operation tool SLV as reproducible recipes. ERPC offers hourly billing starting from 1 hour and supports Crypto Pay with SOL, USDC, or EURC.
ERPC's own ASN (AS200261) granted by RIPE NCC places source nodes, receiving endpoints, and processing nodes within premium data centers where Solana validators are densely concentrated. The company states that software optimizations like XDP and zero-copy achieve maximum effectiveness only on top of this physical and network proximity design.
Anza introduced XDP for Turbine in Agave 3.x (v3.0.9 and later) and carried it into Solana v4 (Agave 4.x). According to Anza's setup guide, using XDP can push outgoing packets to nearly 150,000 per second for large validators due to Turbine fanout. In Agave 4.1, the startup flags were reorganized: --experimental-retransmit-xdp-* flags were deprecated and replaced with --xdp-interface, --xdp-cpu-cores, and --xdp-zero-copy.
This full regional deployment follows a lineage of infrastructure enhancements: the December 2025 full regional Geyser gRPC infrastructure upgrade, the January 2026 large-scale Frankfurt (FRA) region enhancement, and the June 2026 New York (NY) region's early adoption of XDP and zero-copy.
For verification, ERPC provides open-source benchmark tools. Use slv check geyserbench --kind grpc for first-arrival comparisons on Geyser gRPC, and slv check grpc for individual endpoint connectivity and latency checks. For RPC, the company recommends measuring the freshness of returned data using actual requests from the user's bot or application.
ELSOUL LABO has been approved under the Dutch government's R&D support scheme WBSO for five consecutive years since 2022. The company continues R&D on Solana RPC infrastructure, validator operations, real-time data delivery, and AI agent-based operations and development support.
Synthesized by Yomimono from the 1 cited source below, including Japanese-language reporting where cited, then editorially reviewed before publishing.