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LibDDLA v0.0.5

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@userchba userchba released this 05 Sep 09:01
· 10 commits to develop since this release
v0.0.5
f9ed08e

LibDDLA v0.0.5

C++17 distributed dense linear algebra library for GPUs (CUDA/HIP) and CPU, ScaLAPACK-style 2D block-cyclic APIs over MPI. This release covers 56 commits since v0.0.4 (2026-07-31 → 2026-09-04).

Highlights

  • New status-returning C API — every public entry point now returns ddlaStatus_t, with DDLA_CHECK macros and ddlaSetStream for stream ownership on the handle; ddla.h + ddla_handle_t.h are now the only public headers, and all others were moved into src/. (c633490, 352077f)
  • CPU backend support with unified DdlaBackend dispatch — the backend layer is now a template (gemm<Backend, T>, comm_traits.h) covering CPU (OpenBLAS), CUDA, and HIP, including an optional dual CPU+GPU build selectable per handle at runtime. (41c7ace, 83f844b, 691f1b1, c4ce301)
  • Leading-block sub-matrix support for the factor/solve/diag routines, plus expanded solve variants. (2c76bc3, d8d1181)
  • Automatic CI on two HPC clusters — every push now runs the CPU suite on HPC3 and a HIP/DCU (gfx906) 40-case suite on KSSG via GitHub Actions; the HPC3 GPU stage runs as parallel 4-GPU + 6-GPU jobs. (f9ae8f5, ffd0f6e)

New Features

  • ptrtrs gained side='R' (X*op(A)=B) support, and the solve family gained side/trans variants. (49f3164, d8d1181)
  • plapiv gained row/col pivoting direction support; head-location solves added. (d8d1181)
  • CPU random-number generation in random_generator (backend-agnostic matrix generation). (13deeab)
  • Benchmark suite scoped to POTRF paths. (300794b)

Bug Fixes

  • pposv was missing the row permutation of B when the pivot location is not -1. (a397609)
  • pgetrf_bpiv is now a standard LU factorization, and pgetrs_bpiv applies the column pivot in the correct direction. (829202f)
  • Comm/plapiv/pivot correctness fixes and general hardening. (6dd4bb3)
  • gemmVbatched/gemmVbatched2s now accept lowercase transpose modes. (79cf31c)
  • Public headers are self-contained via DDLA_VENDOR_* macros; private headers include the public header first and no longer redeclare default template/function arguments. (dfdaa6e, 0391b81, 165981d)
  • Stream sync before reading last_value in the ppotrf head-correction path.
  • MPI_CHECK in the CCL+TUNNEL build branches; int/status comparison fixes across tests. (33c29e0, c7c43cb)

Build System / Tooling

  • Unified backend dispatch with DdlaBackend templates; CPU/GPU backend reduction. (41c7ace, 691f1b1)
  • Unified comm interface in comm_traits.h; dead comm code removed. (c4ce301, a82ce35)
  • ROCm include dir added to the HIP build for CXX-language TUs. (9cf0cdf)
  • README updated to the current API and comm layer, including the dual CPU+GPU build documentation. (7852315)

CI

  • New GitHub Actions pipeline: HPC3 CPU validation + KSSG HIP/DCU validation (gfx906, DTK 25.04.4, RCCL) on every push to main/develop. (f9ae8f5)
  • HPC3 GPU validation split into 4-GPU (v100g32fat) + 6-GPU (v100m3) parallel jobs after chronic v100g32 congestion. (ffd0f6e)
  • SAI Apptainer GPU validation retired in favor of the KSSG HIP pipeline. (f9ae8f5)

Tests & Benchmarks

  • Test suite reorganized under ctest with cpu/gpu labels; 42 GPU cases + 5 CPU cases run per CI cycle; rank registration standardized (DDLA_TEST_NP). (22377a2, 6f3d566)

Full changelog: v0.0.4...develop (56 commits, 182 files changed, +11740/-3620 lines)

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