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Bug 1871395

Summary:	glibc: Improve IBM Z (s390x) Performance
Product:	Red Hat Enterprise Linux 8	Reporter:	Carlos O'Donell <codonell>
Component:	glibc	Assignee:	Patsy Griffin <pfrankli>
Status:	CLOSED ERRATA	QA Contact:	Sergey Kolosov <skolosov>
Severity:	medium	Docs Contact:	Zuzana Zoubkova <zzoubkov>
Priority:	unspecified
Version:	8.4	CC:	ashankar, codonell, dj, fweimer, mcermak, mnewsome, pfrankli, sipoyare, skolosov, vmukhame
Target Milestone:	rc	Keywords:	FutureFeature, Triaged
Target Release:	8.0	Flags:	pm-rhel: mirror+
Hardware:	s390x
OS:	Linux
Whiteboard:
Fixed In Version:	glibc-2.28-131.el8	Doc Type:	Enhancement
Doc Text:	.Optimized performance of `memcpy` and `memset` on IBM Z With this enhancement, the core library implementation for the `memcpy` and `memset` APIs were adjusted to accelerate both small (< 64KiB) and larger data copies on IBM Z processors. As a result, applications working with in-memory data now benefit from significantly improved performance across a wide variety of workloads.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 14:36:39 UTC	Type:	Enhancement
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1877115

Description Carlos O'Donell 2020-08-23 02:45:19 UTC

Backport the following patches to improve performance:

0792c8ae1aebf538de45ff9a0e2e401a60525de2
S390: Optimize __memcpy_z196.

1d21fb1061cbeb50414a8f371abb36548d90f150
S390: Optimize __memset_z196.

These routines while targeting Z196 are used by all hardware that is newer than Z196. There are no specialized versions for Z14 or beyond on s390x.

Comment 14 errata-xmlrpc 2021-05-18 14:36:39 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Moderate: glibc security, bug fix, and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2021:1585