Libfabric Communication Library @ HotI 2025

Abstract

Libfabric supports multiple communication semantics, is fabric and hardware implementation agnostic, and leverages and expands the existing RDMA open source community. Libfabric is designed to minimize the impedance mismatch between applications, including middleware such as MPI, SHMEM, CCL, etc.

This tutorial focuses on new features like the link provider bridging different providers, and the usage of this new link provider.

We will also focus on updates with UltraEthernet and Libfabric.

Presenters

• Rajalaxmi Angadi, Intel Corporation

• Alexia Ingerson, Intel Corporation

Presenter Bios

Rajalaxmi Angadi is an engineering leader/manager at Intel Corporation with 20+ years of experience in HPC/AI communication software and storage technology. She co-chairs the Women at Intel Network, a senior women community fostering growth for women in tech. She holds a patent and has spoken at multiple conferences.

Alexia Ingerson is a software developer at Intel working as a maintainer of Libfabric. Her focus areas include shared memory and GPU transports.