Note: This is a public test instance of Red Hat Bugzilla. The data contained within is a snapshot of the live data so any changes you make will not be reflected in the production Bugzilla. Email is disabled so feel free to test any aspect of the site that you want. File any problems you find or give feedback at bugzilla.redhat.com.
Bug 1618946 - iml: use openblas instead of atlas
Summary: iml: use openblas instead of atlas
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: Fedora
Classification: Fedora
Component: iml
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Jerry James
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On: 1619074
Blocks: 1506952
TreeView+ depends on / blocked
 
Reported: 2018-08-18 17:06 UTC by Dominik 'Rathann' Mierzejewski
Modified: 2018-10-13 17:00 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2018-10-13 17:00:53 UTC
Type: Bug
Embargoed:

Attachments (Terms of Use)

Description Dominik 'Rathann' Mierzejewski 2018-08-18 17:06:17 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):
iml-1.0.5-8.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 2018-08-20 02:15:20 UTC 
Same comment on a bunch of packages, but I'll just make it here: we need to switch the entire Macaulay2 / sagemath stack at once, or else we'll wind up with binaries that are linked with both atlas and openblas.  Unfortunately, the fflas-ffpack testsuite is segfaulting on s390x when built with openblas.  This may be a bug in the fflas-ffpack code, but it is suspicous that no such segfault occurs with atlas, nor with the reference blas, and that with openblas it only occurs on s390x.  See the referenced bug.  That will have to be fixed prior to converting the rest of the stack to openblas.

See https://koji.fedoraproject.org/koji/taskinfo?taskID=29190683 for a scratch build demonstrating the problem.
Comment 2 Jerry James 2018-10-13 17:00:53 UTC 
Built in Rawhide.
Note You need to log in before you can comment on or make changes to this bug.