Issues

• openblas_set_threads_callback_function is a silent no-op on Windows

  OpenMathLib/OpenBLAS#6108 · Filter by author uuiitwp opened on Oct 8, 2026

• CBLAS complex non-absolute index extensions depend on stride-hole elements

  OpenMathLib/OpenBLAS#6107 · Filter by author BenKnill opened on Oct 7, 2026
  3

• SVE complex GEMM packing mispartitions rows at VL384 (QEMU)

  OpenMathLib/OpenBLAS#6104 · Filter by author BenKnill opened on Oct 7, 2026

• SVE small SGEMM/DGEMM writes output padding at VL384 (QEMU)

  OpenMathLib/OpenBLAS#6103 · Filter by author BenKnill opened on Oct 7, 2026

• SDOT/DDOT overcount at SVE VL384 (QEMU)

  OpenMathLib/OpenBLAS#6102 · Filter by author BenKnill opened on Oct 7, 2026

• NEOVERSEV1/V2 SBGEMV fallback retains NaN when beta=0

  OpenMathLib/OpenBLAS#6101 · Filter by author BenKnill opened on Oct 7, 2026

• ARMV8SVE SYRK/SYR2K panel splits disagree with SVE packing at wider VL

  OpenMathLib/OpenBLAS#6100 · Filter by author BenKnill opened on Oct 7, 2026

• GCC ARMV9SME: SGEMM/SSYMM/SSYRK/SSYR2K/STRMM direct C kernels can return without computing

  OpenMathLib/OpenBLAS#6099 · Filter by author BenKnill opened on Oct 7, 2026

• AArch64 NRM2 returns infinity for a norm below DBL_MAX

  OpenMathLib/OpenBLAS#6094 · Filter by author BenKnill opened on Oct 5, 2026
  1

• .subsections_via_symbols directive causes invalid symbol pruning in macOS x86-64 kernels

  OpenMathLib/OpenBLAS#6089 · Filter by author topolarity opened on Oct 2, 2026
  3

• arm64 SME2 (Apple M4): SGEMM/DGEMM well below the hardware, level-3 routines on NEON, M4 Pro not detected

  OpenMathLib/OpenBLAS#6073 · Filter by author tesch1 opened on Sep 29, 2026
  2

• SIGILL on EPYC 7713P Zen3 (family 0x19, exfamily 9), AVX2, no AVX-512

  OpenMathLib/OpenBLAS#6069 · Filter by author gland1 opened on Sep 28, 2026
  1

• Missing cgroup awareness

  OpenMathLib/OpenBLAS#6059 · Filter by author itamarst opened on Sep 21, 2026
  2

• AMD Zen 5 architecture is misidentified

  OpenMathLib/OpenBLAS#6029 · Filter by author yurivict opened on Sep 13, 2026
  21

• Documentation: mkdocs is set for a breaking change. Time to move on?

  OpenMathLib/OpenBLAS#5870 · Filter by author MaddyGuthridge opened on Jun 25, 2026
  4

• Mixture of tabs and spaces can make reading code difficult in some configurations (e.g. browsing on GitHub)

  OpenMathLib/OpenBLAS#5834 · Filter by author itamarst opened on Jun 11, 2026
  1

• Data conversion when packing

  OpenMathLib/OpenBLAS#5647 · Filter by author ChipKerchner opened on Feb 13, 2026
  4

• Parallelization along K-dimension (Parallel Reduction) for GEMM with small M/N and large K

  OpenMathLib/OpenBLAS#5629 · Filter by author seulchanson opened on Jan 28, 2026
  2

• It seems impossible to pin the threads

  OpenMathLib/OpenBLAS#5590 · Filter by author rongcuid opened on Jan 3, 2026
  4

• OpenBLAS bottlenecks multithreading benefits in symv.c interface at 8 working threads due to memory allocator lock conflict

  OpenMathLib/OpenBLAS#5589 · Filter by author BioTurboNick opened on Jan 2, 2026
  11

• 2 GB at the start

  Support
  OpenMathLib/OpenBLAS#5587 · Filter by author tim-lebedkov opened on Dec 29, 2025
  7

• BIGNUMA and NUM_THREADS>256 on 2×192-core AmpereOne (AArch64)

  OpenMathLib/OpenBLAS#5555 · Filter by author DanielWicz opened on Nov 28, 2025
  3

• GEMM promote perfomance

  OpenMathLib/OpenBLAS#5541 · Filter by author kaka1989-tpp opened on Nov 19, 2025

• Extreme, load dependent slowness on multi-core CPUs with, for example, many iterations of a complex eigenproblem.

  OpenMathLib/OpenBLAS#5517 · Filter by author sdh4 opened on Oct 24, 2025
  5

• Need for HGEMM and HGEMV?

  OpenMathLib/OpenBLAS#5502 · Filter by author ChipKerchner opened on Oct 10, 2025
  2