Le mercredi 07 janvier 2026 à 23:35 +0530, Trupti a écrit : > On 2026-01-07 11:29, Simon Richter wrote: > > On 1/7/26 5:57 AM, Sébastien Villemot wrote: > > > > > If you have the time, could you possibly also check that the two other > > > autopkgtest regressions (in src:gemma and src:openmolcas) are also > > > tolerance-related? (see https://tracker.debian.org/pkg/openblas for > > > the > > > list of autopkgtest regressions) > > For src:gemma, the autopkgtest failure on ppc64el occurs during the > eigen-decomposition step. > The run reports a warning about many eigenvalues close to zero, followed > by an LU decomposition failure in GSL/LAPACK. > The failure is triggered in the following code path: > > // LU decomposition. > void LUDecomp(gsl_matrix *LU, gsl_permutation *p, int *signum) { > // debug_msg("entering"); > enforce_gsl(gsl_linalg_LU_decomp(LU, p, signum)); > return; > } > > > > For src:openmolcas, the autopkgtest failures on ppc64el are limited to > CASPT2 tests (standard tests 009, 010 and hdf5 test 601). > The logs show floating-point exceptions (IEEE invalid, divide-by-zero, > underflow) followed by CASPT2 convergence failures (_NOT_CONVERGED_ / > _INTERNAL_ERROR_). > All non-CASPT2 tests complete successfully. The CASPT2 output itself > indicates numerical instability and suggests increasing > linear-dependence thresholds.
Thanks Trupti. Do you consider the following as a good summary of your analysis: there is no structural problem in the new OpenBLAS on ppc64el (just slightly numerically different results, within the usual tolerance of numerical software), and as a consequence the adjustment needs to be done in the testsuite of the affected reverse dependencies (xtensor-blas, gemma and openmolcas)? (that seems clear from what you said of src:xtensor-blas and src:openmolcas, less so for the case of src:gemma, hence my question) Paul: if my statement above is correct, what would be the right course of action? -- ⢀⣴⠾⠻⢶⣦⠀ Sébastien Villemot ⣾⠁⢠⠒⠀⣿⡁ Debian Developer ⢿⡄⠘⠷⠚⠋⠀ https://sebastien.villemot.name ⠈⠳⣄⠀⠀⠀⠀ https://www.debian.org
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