VOOZH about

URL: https://www.phoronix.com/news/OpenBLAS-0.3.33-Released

⇱ OpenBLAS 0.3.33 Released With Automatic "BIGNUMA" For More Than 256 CPU Cores - Phoronix


👁 Phoronix

OpenBLAS 0.3.33 Released With Automatic "BIGNUMA" For More Than 256 CPU Cores

Written by Michael Larabel in Programming on 23 April 2026 at 08:23 AM EDT. 1 Comment
OpenBLAS 0.3.33 is out today as the latest update to this vendor-neutral, optimized Basic Linear Algebra Subprograms "BLAS" library.

For a while now OpenBLAS has supported a "BIGNUMA" setting if wanting to enable support for more than 256 CPU cores. This experimental option has allowed supporting up to 1024 CPU cores and 128 NUMA nodes in the "BIGNUMA=1" configuration. Now with OpenBLAS 0.3.33, the BIGNUMA setting is automatic when the number of CPU cores on the system exceeds 256. Great to see especially with the next-gen Intel Xeon and AMD EPYC processors pushing system core counts even higher.

👁 AMD EPYC 9965 CPU


OpenBLAS 0.3.33 has also made various adjustments from the reference LAPACK implementation to realign with its upcoming v3.13 release.

OpenBLAS 0.3.33 also brings a number of bug fixes, automatic detection for Arm Neoverse V3, some optimizations for Neoverse N2, x86_64 build fixes, and optimized STRSM and DTRSM kernels for WebAssembly.

Downloads and more details on the OpenBLAS 0.3.33 release can be found via GitHub.

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.