Bug 1619061 - sagemath: use openblas instead of atlas
Summary: sagemath: use openblas instead of atlas
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: sagemath
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Paulo Andrade
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: 1506952
TreeView+ depends on / blocked
 
Reported: 2018-08-20 00:30 UTC by Dominik 'Rathann' Mierzejewski
Modified: 2019-01-18 20:30 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2019-01-18 20:30:10 UTC
Type: Bug
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Description Dominik 'Rathann' Mierzejewski 2018-08-20 00:30:31 UTC 
Description of problem:
Please BuildRequire: openblas instead of atlas where available (x86_64 %{ix86} armv7hl %{power64} aarch64 s390x, see %{openblas_arches} macro defined in openblas-srpm-macros package). Currently, it's available on all primary Fedora arches, so you can technically skip using the macro.

Version-Release number of selected component (if applicable):
sagemath-core-8.2-4.fc29

Additional information:
OpenBLAS selects best code path for the target architecture at runtime unlike ATLAS.

A lot of benchmarks around the net suggest openblas is faster than ATLAS in most workloads:
https://github.com/tmolteno/necpp/issues/18
http://blog.nguyenvq.com/blog/2014/11/10/optimized-r-and-python-standard-blas-vs-atlas-vs-openblas-vs-mkl/
https://freddie.witherden.org/pages/blas-gemm-bench/
http://nghiaho.com/?p=1726

Many Fedora packages have switched to openblas already (e.g. scalapack and all dependent ones and numpy).
Comment 1 Jerry James 2019-01-18 20:30:10 UTC 
Fixed in Rawhide.
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