# linux-rdma/rdma-core

RDMA core userspace libraries and daemons

Repository: https://github.com/linux-rdma/rdma-core
Canonical: https://ross.abutalabs.com/products/rdma-core
Language: C
License: NOASSERTION
License Family: other
Topics: rdma, linux-kernel, userspace-libraries, infiniband, iwarp, roce, kernel-rdma-drivers
Last push: 2026-08-26T18:39:27+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 80, longevity 100
- inputs: {"age_days": 3637, "days_push": 7, "days_rel": 56, "gap_med": 0, "n_releases_24m": 152}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2352, forks 899 (observed 2026-08-28T04:06:40.412526+00:00)

## What it is
rdma-core provides the userspace libraries and daemons for the Linux kernel's RDMA (drivers/infiniband) subsystem, including libibverbs, librdmacm, and libibumad. It includes provider plugins for many RDMA-capable NICs (Mellanox, Chelsio, AWS EFA, etc.) plus service daemons like srp_daemon, iwpmd, and ibacm.

## Use cases
- write applications that use RDMA verbs for low-latency networking
- set up RoCE or iWARP on Linux with rdma link
- enable userspace access to InfiniBand device nodes
- run software RDMA (rxe/siw) over existing Ethernet interfaces
- manage SRP storage targets with srp_daemon
- build HPC or distributed storage software using RDMA transports

## When to choose
- you need userspace RDMA support on Linux for InfiniBand, RoCE, or iWARP hardware
- you are developing applications against the libibverbs/librdmacm APIs
- you need provider libraries for a specific RDMA-capable NIC driver

## When to avoid
- you need RDMA on non-Linux platforms
- you only need TCP/UDP networking without kernel-bypass
- you want a high-level networking abstraction rather than low-level verbs programming

## Facets
- artifact type: library
- maturity: stable
- function: networking, sdk, developer-tools
- domain: networking, operating-systems, hardware, developer-tools
- platform: c, cpp
- tags: rdma, infiniband, roce, iwarp, libibverbs, kernel-drivers, userspace-libraries, high-performance-computing, linux

## Member repositories
- linux-rdma/rdma-core (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:40.412526+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:36:52.342368+00:00, confidence not recorded.
  - readme: https://github.com/linux-rdma/rdma-core (fetched 2026-08-28T04:06:40.412526+00:00, sha af80bd3c375f)
- Data as of 2026-08-30T08:39:29.467469+00:00.