Elastic Fabric Adapter release notes - Amazon Elastic Compute Cloud
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Elastic Fabric Adapter release notes

The following table describes the version history and changelog for the Elastic Fabric Adapter software.

Version Changes Release date
1.46.0

  • Add Support for Debian 13

  • Upgrade to efa-nv-peermem 1.2.3

    • Fix build errors and warnings with new kernels and DKMS

  • Upgrade to libfabric 2.3.1amzn4.0

    • Enable data path direct for efa-rdm protocol path

    • Enable ROCr HMEM support

    • New FI_OPT_EFA_USE_UNSOLICITED_WRITE_RECV option to disable unsolicited write recv

    • Optimize connection establishment time

  • Add libnccl-ofi on RHEL 9, Rocky Linux 9, and Debian 13

 December 12, 2025
1.45.1

  • Upgrade to libfabric 2.3.1amzn3.0

    • Fix bug that truncated cq_data to 2 bytes while provider advertised support for 4 bytes

 November 26, 2025
1.45.0

  • Upgrade to rdma-core 60.amzn0

    • Extend DV query CQ to return doorbell

  • Upgrade to libfabric 2.3.1amzn2.0

    • Support FI_RX_CQ_DATA mode for efa-direct

    • Optimize WQE post in data path direct path

    • Fix the race condition in cntr progress

    • Improve the logging for warning messages

    • Handles RMA completion correctly for removed peers

    • Evict AH entries from implicit AV when AH limit is reached

  • Upgrade to libnccl-ofi 1.17.2

    • Fixed a crash with NCCL v2.28.x when Libfabric initialization failed

    • Added support for g7e instance family

    • Fixed an issue where NCCL could erroneously attempt to use a GPUDirect RDMA path on platforms that support DMA-BUF

    • Fixed shutdown ordering issue on NICs that require per-endpoint memory registration (Cray Slingshot)

 November 17, 2025
1.44.0

  • Upgrade to rdma-core 59.amzn0

    • Add support to bind QPs and CQs to thread domains

    • Add support to allocate a parent domain

    • Add support to allocate thread domains

    • Add direct verbs query QP and CQ

    • Add option to create CQ with external memory`

    • Fix CQ poll after QP destroy

  • Upgrade to libfabric 2.3.1amzn1.0

  • Upgrade to Open MPI 5.0.8amzn1

    • Functionality enhancements

    • Bug fixes

  • Upgrade to libnccl-ofi 1.17.1

    • Supports NCCL v2.28.3-1 while maintaining backward compatibility with NCCL v2.17.1 and later.

    • Building with platform-aws requires Libfabric v1.22.0amzn4.0 or greater. Tested with versions up to Libfabric v2.3.1amzn1.0.

    • Fixes to support compatibility across CUDA12 and CUDA13.

 October 29, 2025
1.43.3

  • Upgrade to efa driver 2.17.3

    • Support P2P with NVIDIA 580 drivers

    • Adjust MR registration for 6.17 and on kernels

 October 01, 2025
1.43.2

  • Upgrade to libnccl-ofi 1.16.3

    • Supports NCCL v2.27.7-1 while maintaining backward compatibility with NCCL v2.17.1 and later.

    • Building with platform-aws requires Libfabric v1.22.0amzn4.0 or greater. Tested with versions up to Libfabric 2.1.0amzn5.0.

    • Enable domain-per-thread by default on all Amazon EC2 instance types for improved performance for some applications where NCCL creates multiple proxy threads

 August 15, 2025
1.43.1

  • Upgrade to libnccl-ofi 1.16.2

    • Supports NCCL v2.27.6-1 while maintaining backward compatibility with NCCL v2.17.1 and later.

    • Building with platform-aws requires Libfabric v1.22.0amzn4.0 or greater. Tested with versions up to Libfabric 2.1.0amzn4.0.

    • Added a new platform configuration to support using the OFI NCCL plugin on the Amazon EC2 p5.4xlarge instance type

  • Upgrade to libfabric 2.1.0amzn5.0

 July 31, 2025
1.43.0

  • Upgrade to libnccl-ofi 1.16.1

    • Supports NCCL v2.27.6-1 while maintaining backward compatibility with NCCL v2.17.1 and later.

    • Building with platform-aws requires Libfabric v1.22.0amzn4.0 or greater. Tested with versions up to Libfabric 2.1.0amzn3.

    • Update the PCI link speed format reported in the topology file to match kernel 5.7+

    • Added SKIP_NICS_WITHOUT_ACCEL_AT_SAME_PCI_LEVEL to skip libfabric nics that do not have an accelerator at the same pci level

  • Upgrade to efa driver 2.17.2

  • Upgrade to efa-nv-peermem 1.2.2

  • Upgrade to libfabric 2.1.0amzn4.0

  • Upgrade to rdma-core 58.amzn0

    • Fix work request index double use

    • Add WQE length to post_send tracepoint

  • Enable optimizations for Graviton platforms

  • Deprecate support for Ubuntu 20.04

 July 25, 2025
1.42.0

  • Upgrade to efa driver 2.15.3

  • Upgrade to efa-nv-peermem 1.2.1

  • Upgrade to rdma-core 57.amzn1

    • Fix work request index double use

  • Upgrade to libfabric 2.1.0amzn3.0

  • Upgrade to libnccl-ofi 1.15.0

    • Supports NCCL 2.26.6-1 while maintaining backward compatibility with (NCCL v2.17.1 and later.

    • Building with platform-aws requires Libfabric v1.22.0amzn4.0 or greater. Tested with versions up to Libfabric 2.1.0amzn3.

    • Build system and platform support

      • Added Amazon EC2 P6-B200 platform support

      • Changed default plugin library name to libnccl-net-ofi.so, and by default create symlink from libnccl-net-ofi.so to libnccl-net.so to maintain backward compatibility. This allows users to set NCCL_NET_PLUGIN=ofi to force NCCL to use the OFI plugin for communication. Specifying --disable-nccl-net-symlink to configure will skip the symlink, allowing multiple plugins to be installed in the same container.

    • Tuning and performance improvements

      • Added tuner support on P6-B200 for AllReduce, AllGather, and ReduceScatter regions for 0x0 and 0x7 bitmask

      • Updated default latency for P5en and P6-B200 platforms based on empirical results and analysis

    • Update to use NCCL v10 API with trafficClass parameter support for future traffic prioritization

    • Migrated plugin code base from C to C++

    • Added support for jobs where the number of NICs per GPU is different across systems. See the OFI_NCCL_FORCE_NUM_RAILS runtime environment variable documentation for more information.

 June 6, 2025
1.41.0

  • Upgrade to rdma-core 57.amzn0

 May 16, 2025
1.40.0

  • Upgrade to libfabric 2.1.0amzn2.0

  • Upgrade to rdma-core 56.0

  • Upgrade to efa-config 1.18.

  • Deprecate support for Debian 10

  • Upgrade to libnccl-ofi 1.14.2

  • Enable CUDA support in Libfabric on ARM for Ubuntu and Amazon Linux 2023

  • Add libnccl-ofi on ARM for Ubuntu and Amazon Linux 2023

 May 2, 2025
1.39.0

  • Upgrade to libfabric 2.1.0

  • Upgrade to Open MPI 5.0.6

  • Upgrade to libnccl-ofi 1.14.1

  • Upgrade to efa driver 2.15.0

 April 16, 2025
1.38.1

  • Update to Libfabric 1.22.0amzn5.0

 March 3, 2025
1.38.0

  • Add libnccl-ofi 1.13.2-1

 January 8, 2025
1.37.0

  • Upgrade to libfabric 1.22.0amzn4.0

  • Upgrade to rdma-core 54.amzn0

 November 18, 2024
1.36.0

  • Add support for Debian 12

  • Distribute efa_test.sh as a utility script at /opt/amazon/efa/bin

  • Upgrade to efa driver 2.13.0

  • Upgrade to libfabric 1.22.0amzn3.0

  • Upgrade to rdma-core 54.0

  • Upgrade to open mpi 4.1.7

 November 7, 2024
1.35.0

  • Upgrade to Open MPI 5.0.5

  • Upgrade to PRRTE 3.0.6 and rename the RPM package to prrte-aws

  • Rename the OpenPMIx RPM package to pmix-aws

  • Configure build options for dpkg and RPM builds

  • Upgrade to Libfabric 1.22.0amzn2.0

  • Upgrade to efa driver 2.12.1

 October 14, 2024
1.34.0

  • Drop support for CentOS 7 and RHEL 7

  • Ingest Libfabric 1.22.0amzn1.0

  • Update efa-config package to 1.17

 August 6, 2024
1.33.0

  • Upgrade to efa driver 2.10.0

  • Upgrade to rdma-core 52.0

  • Upgrade to PRRTE 3.0.5

  • Upgrade to Open MPI 5.0.3

  • Add support for Ubuntu 24.04 LTS

  • Remove OpenPMIx, PRRTE and Open MPI HTML documentation. Users should refer to the official website.

  • Drop support for openSUSE 15.4 or older

 June 20, 2024
1.32.0

  • Upgrade to efa driver 2.8.0

  • Upgrade to efa-nv-peermem driver 1.1.1

  • Upgrade efa-config package to 1.16

  • Upgrade efa-profile package to 1.7

  • Upgrade to rdma-core 50.0

  • Upgrade to libfabric 1.21.0amzn1.0

  • Enhance efa_test.sh with fi_pingpong port selection

  • Install newer rdma-core from system when required

 April 18, 2024
1.31.0

  • Upgrade to OpenPMIx 4.2.8

  • Upgrade to PRRTE 3.0.3

  • Upgrade to Open MPI 5.0.2, and convert MCA components to DSO.

  • Upgrade to Libfabric 1.20.1amzn1.0

 March 7, 2024
1.30.0

  • Include OpenPMIx 4.2.7, installed at /opt/amazon/pmix by default

  • Include PRRTE 3.0.2, installed at /opt/amazon/prrte by default

  • Include Open MPI 5.0.0, installed at /opt/amazon/openmpi5 by default

  • Update efa-profile to 1.6

 December 2023
1.29.1

  • Ingest libfabric 1.19.0amzn4.0

 December 2023
1.29.0

  • Ingest efa kernel driver 2.6.0

  • Ingest libfabric 1.19.0amzn3.0

 November 2023
1.28.0

  • Upgrade Open MPI to 4.1.6

  • Ingest libfabric 1.19.0amzn2.0

 October 2023
1.27.0

  • Add Libfabric 1.19.0amzn1.0 to installer

  • Enable GCC builtin atomics for Open MPI 4

 September 2023
1.26.1

  • efa_test.sh: fix infinite retry bug

 September 2023
1.26.0

  • Add support for RHEL 9

  • Fix debug build on multiple distributions

  • Ingest libfabric 1.18.2amzn1.0

  • efa_test.sh: Add retry for fi_pingpong

 September 2023
1.25.1

  • Ingest libfabric 1.18.1amzn1.0

  • Update timeouts in EFA installer scripts

 September 2023
1.25.0

  • Add support for Amazon Linux 2023

  • Bugfix in post-installation test

 July 2023
1.24.1

  • Upgrade libfabric to 1.18.1

  • Upgrade efa driver to 2.5.0

 July 2023
1.24.0

  • Ingest rdma-core 46.0

  • Ingest efa driver 2.4.1

  • Support Debian 11

 June 2023
1.23.1

  • Ingest libfabric 1.18.0amzn2.0

 June 2023
1.23.0

  • Add support for Debian 10

  • Drop support for Ubuntu 18.04 LTS

  • Upgrade efa-config package to 1.14

  • Ingest libfabric 1.18.0amzn1.0

 May 2023
1.22.1

  • Upgrade libfabric to 1.17.1

 March 2023
1.22.0

  • Upgrade Open MPI to 4.1.5

  • Upgrade libfabric to 1.17.0

  • Upgrade efa-config package to 1.13

 February 2023
1.21.0

  • Add support for Rocky Linux 9 OS

  • Ingest efa driver 2.1.1

  • Ingest libfabric 1.16.1amzn3.0

  • Upgrade efa-config package to 1.12

 December 2022
1.20.0

  • Add support for Rocky Linux 8 OS.

  • Ingest efa driver 2.1.0.

  • Ingest rdma-core 43.0.

  • Ingest libfabric 1.16.1amzn1.0

 November 2022
1.19.0

  • Ingest libfabric 1.16.0

  • Build Open MPI with --enable-orterun-prefix-by-default

 October 2022
1.18.0

  • Add support for Ubuntu22.04

 August 2022
1.17.3

  • Update libfabric to 1.16.0~amzn4.0. The ~ indicates it is a pre-release version of libfabric 1.16.0.

  • Extend post-installation pingpong test timeout to 20 seconds

 August 2022
1.17.2

  • Update libfabric to 1.16.0~amzn3.0. The ~ indicates it is a pre-release version of libfabric 1.16.0.

 July 2022
1.17.1

  • Update libfabric to 1.16.0~amzn2.0. The ~ indicates it is a pre-release version of libfabric 1.16.0.

  • Disable the experimental net provider when building libfabric

 July 2022
1.17.0

  • Update rdma-core to v41.0

  • Update Open MPI to 4.1.4

  • Update libfabric to 1.16.0~amzn1.0. The ~ indicates it is a pre-release version of libfabric 1.16.0.

 July 2022
1.16.0

  • Update libfabric to 1.15.1amzn1.0, contains neuron library name change

  • Upgrade efa-config to 1.10

  • Exclude opx and rxd providers in the libfabric build

 June 2022
1.15.2

  • Update libfabric to 1.14.1

 May 2022
1.15.1

  • Update libfabric to 1.14.0amzn1.0

 March 2022
1.15.0

  • Fix a bug that cause installation fail on Open SuSE 15.3

  • Drop support of Open SuSE 15.2 (as Open SuSE 15.2 reached end of life)

  • Drop Support of CentOS 8 (as CentOS 8 reached end of life)

  • Update libfabric to 1.14.0

  • Update efa kernel driver to 1.16.0

  • Update rdma-core to v39.0

  • Update Open MPI to version 4.1.2.

 Feburary 2022
1.14.1

  • Update libfabric to 1.13.2amzn1.0.

 October 2021
1.14.0

  • Ingest efa kernel driver 1.14.2.

  • Make -g, --enable-gdr in efa_installer.sh as a no-op option as the latest efa kernel driver enables GDR support by default.

  • Ingest rdma-core v37.0.

  • Ingest libfabric 1.13.2.

  • Add packages list and compare RPM/DEB to list during installation to prevent unknown package installations.

  • Add sleep in installer script to wait for udev rule to apply after EFA driver reload.

 October 2021
1.13.0

  • Update rdma-core to v35.0.

  • Update libfabric to v1.13.0amzn1.0.

  • Add EFA support for CentOS/RHEL 8 on Gravition2 platform.

  • Add version comparison logic in installer script to skip the local package installation when there is one installed in system with higher version.

 August 2021
1.12.3

  • Update EFA kernel module to 1.13.0.

  • Update efa-config package to version 1.9. Improve the calculation of huge page reservation to handle large defaulted huge page size.

 July 2021
1.12.2

  • Update EFA kernel module to 1.12.3.

  • Build Open MPI debian packages with --with-libevent=external and --with-hwloc=external.

  • Bump Open MPI rpm build ID to 2 to fix backward compatibility issue of HWLOC on CentOS 8.

  • Remove the installation of kernel-devel and kernel-source packages on SLES15SP2 and openSUSE 15.2.

 June 2021
1.12.1

  • Update Libfabric to version 1.11.2amzon1.1.

  • Update EFA kernel module to version 1.12.1.

 May 2021
1.12.0

  • Update Open MPI to version 4.1.1.

  • Update Libfabric to version 1.11.2amzn1.0.

  • Build rdma-core for Amazon Linux 2 using the same packaging configuration as the AL2 rdma-core.

  • Do not force -Wl,--enable-new-dtags when building Open MPI RPMs.

  • Build Open MPI with system libraries for hwloc and libevent.

  • Update EFA kernel module to version 1.12.0

  • Update efa-config package to version 1.8. Improve the calculation of huge page reservation for long-lived instances.

  • Update efa-profile package to version 1.5. Remove the open mpi collective tuning file that worked as a workaround to fix Open MPI 4.1.0 hang on P4d.

  • Update rdma-core to v32.1.

  • Drop support for Amazon Linux 1 and Ubuntu 16.04.

 May 2021
1.11.2

  • Fix Open MPI hang when using Open MPI on P4d by changing the default algorithm used to implement MPI_BARRIER via a configuration file.

  • Disable use of builtin atomics in Open MPI on ARM via --disable-builtin-atomics to work around compiler issue.

 February 2021
1.11.1

  • Update Open MPI to version 4.1.0.

  • Update efa-config package to version 1.7. Improve calculation of huge page reservation count.

  • Update efa-profile package to version 1.3. Removes unneeded collectives decision file now that Open MPI 4.1.0 is used.

 December 2020
1.11.0

  • Add support for Gravition2 platform.

  • Update rdma-core to version 31.2amzn.

  • Update Libfabric to version 1.11.1amzn1.0.

  • Update efa-config to version 1.6.

  • Update efa-profile to version 1.2.

 December 2020
1.10.1

  • Add support for CentOS / RHEL 8.

  • Add support for Ubuntu 20.04.

  • Add support for SUSE Linux Enterprise 15.

 November 2020
1.10.0

  • Add GPUDirect RDMA support for P4d platform. Use --enable-gdr installer option to instal GDR-aware kernel module and userspace.

  • Update EFA kernel module to version 1.10.2.

  • Update rdma-core to version 31.amzn0.

  • Update Libfabric to version 1.11.1.

  • Update Open MPI to version 4.0.5.

  • Update efa-config to version 1.5.

  • Update efa-profile to version 1.1. Includes improved Open MPI collectives decision file.

 October 2020
1.9.5

  • Update efa-config to version 1.4. Fixes bug in Open MPI collective decision file.

 September 2020
1.9.4

  • Update Open MPI to version 4.0.3.

  • Update Libfabric to version 1.10.1amazon1.1.

  • Update rdma-core to version 28.amzn0.

 July 2020
1.9.3

  • Update EFA kernel module to version 1.6.0.

  • Update rdma-core to version 28.amzn0.

  • Update Libfabric to version 1.10.1amzn1.1.

  • Update efa-config to version 1.3. Adds collectives tuning file for Open MPI.

  • Skip dkms installation if it is already installed.

  • Fix --skip-kmod installation mode to actually work.

 June 2020
1.8.4

  • Move configuration files into efa-config and efa-profile packages so that they are tracked by the operating system package manager.

  • Update Open MPI to version 4.0.3.

 April 2020
1.8.3

  • Update EFA kernel module to version 1.5.1.

  • Distributed DKMS on some platforms rather than relying on EPEL repositories for added installation reliability.

  • On RHEL 7, install RPMs built on CentOS 7 instead of RPMs built on Amazon Linux 2.

 February 2020
1.8.2

  • Revert rdma-core to version 25 due to a mismatch in device naming between kernel module and rdma-core.

 January 2020
1.8.1

  • Update Libfabric to version 1.9.0amzn1.1.

 January 2020
1.8.0

  • Update rdma-core to version 27.0.

  • Update EFA kernel module to version 1.5.0.

  • Update Libfabric to version 1.9.0amzn1.0.

  • Add option --minimal to install just the EFA kernel module and rdma-core.

 December 2019
1.7.1

  • Update Libfabric to version 1.8.1amzn1.3.

 December 2019
1.7.0

  • Add Libfabric module file.

  • Update Libfabric to version 1.8.1amzn1.1.

 November 2019
1.6.2

  • Update Open MPI to version 1.6.2.

 October 2019
1.6.1

  • Update Libfabric to version 1.8.1amzn1.0.

  • Update Open MPI to version 4.0.1.

  • Update rdma-core to version 26.0.

 October 2019
1.5.4

  • Update EFA kernel module to version 1.4.1.

 September 2019
1.5.3

  • Update EFA kernel module to version 1.3.1.

  • Avoid installing kernel-devel or linux-headers packages unless installing the kernel driver.

 September 2019
1.5.1

  • Only configure huge pages when EFA device is present.

 August 2019
1.5.0

  • Update Libfabric to version 1.8.0amzn1.1.

  • Update rmda-core to version 25.0.

 August 2019
1.4.1

  • Add Libfabric and Open MPI library paths (/opt/amazon/efa/lib64 and /opt/amazon/efa/openmpi/lib) to /etc/ld.so.conf.d/efa.conf to ensure the Open MPI and Libfabric shared libraries are properly located.

 July 2019
1.4.0

  • Update EFA kernel module to version 1.3.0.

  • Update Libfabric to version 1.8.0amzn1.0

  • First release to support Intel MPI 2019 Update 4.

 July 2019