PR#570: #539 FlexiBLAS as BLAS/LAPACK manager - fedora-docs/release-notes

fedora-docs / release-notes

#570 #539 FlexiBLAS as BLAS/LAPACK manager

Closed 3 years ago by pbokoc. Opened 3 years ago by quiet.

Unknown source iss539 into f33

Applies SME feedback

Jaroslav Klech • 3 years ago

78499dc

Describes issue no.539

Jaroslav Klech • 3 years ago

fd7823f

modules/release-notes/pages/sysadmin/Distribution.adoc

file modified

+18

		`@@ -3,3 +3,21 @@`

		`[[select-distribution]]`
		`= Distribution-wide Changes`
		`+`
		`+ == FlexiBLAS enables runtime switching of BLAS/LAPACK backend`
		`+`
		`+ Basic Linear Algebra Subprograms (BLAS) and Linear Algebra PACKage (LAPACK) are API standards for basic linear algebra operations.`
		`+`
		`+ From Fedora 33, the packages that use BLAS and LAPACK APIs will be compiled against FlexiBLAS.`
		`+`
		`+ FlexiBLAS is a framework that wraps the BLAS and LAPACK APIs with interfaces for both 32-bit and 64-bit integers.`
		`+`
		`+ As a result, FlexiBLAS will set the OpenBLAS standard as the system-wide default backend. At the same time the change will resolve the following issues:`
		`+`
		`+ * Fedora lacks a system-wide default.`
		`+ * Fedora lacks a proper switching mechanism.`
		`+`
		`+ This update also brings the following changes:`
		`+`
		`+ * Recompilation of all BLAS and LAPACK dependent packages that link against FlexiBLAS instead of the current implementation they are using.`
		`+ * Changing the packaging guidelines to reflect the previous requirement for BLAS and LAPACK consumers. For more details, see the [citetitle]_link:++https://fedoraproject.org/wiki/PackagingDrafts/BLAS_LAPACK++[PackagingDrafts/BLAS LAPACK]_ Fedora Wiki page.`

quiet commented 3 years ago

Fixes #539

quiet commented 3 years ago

Hello @iucar

I prepared a writeup for this release note, based on your input text from https://fedoraproject.org/wiki/Changes/FlexiBLAS_as_BLAS/LAPACK_manager

Could you, please, review my proposal?

Thanks for your help,

iucar commented on line 6 of modules/release-notes/pages/sysadmin/Distribution.adoc 3 years ago

I'd say that the main highlight is that FlexiBLAS allows runtime switching of the BLAS/LAPACK backend. As a side benefit, we centralize setting a system-wide default, which has been set to the OpenMP version of OpenBLAS.

iucar commented on line 8 of modules/release-notes/pages/sysadmin/Distribution.adoc 3 years ago

*LAPACK

iucar commented on line 10 of modules/release-notes/pages/sysadmin/Distribution.adoc 3 years ago

It's the packages that use the BLAS/LAPACK API which got compiled against FlexiBLAS. The blas and *lapack packages just contain the reference implementation.

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