Bug 1871395

Summary: glibc: Improve IBM Z (s390x) Performance
Product: Red Hat Enterprise Linux 8 Reporter: Carlos O'Donell <codonell>
Component: glibcAssignee: Patsy Griffin <pfrankli>
Status: CLOSED ERRATA QA Contact: Sergey Kolosov <skolosov>
Severity: medium Docs Contact: Zuzana Zoubkova <zzoubkov>
Priority: unspecified    
Version: 8.4CC: ashankar, codonell, dj, fweimer, mcermak, mnewsome, pfrankli, sipoyare, skolosov, vmukhame
Target Milestone: rcKeywords: FutureFeature, Triaged
Target Release: 8.0   
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