Red Hat Bugzilla – Bug 463523
[LTC 6.0 FEAT] 200949:Additional Power6 and related Power Optimizations in glibc
Last modified: 2016-11-24 07:05:38 EST
Emily J. Ratliff <email@example.com> - 2008-09-17 10:44 EDT
1. Feature Overview:
Feature Id: 
a. Name of Feature: Additional Power6 and related Power Optimizations for glibc
b. Feature Description
As we deploy POWER6 we will find a fix additional performance issues that
require GLIBC/powerpc-cpu updates to result. For now we know of: Mutex Hints
(GLIBC upstream). string functions exploit POWER6 instructions (GLIBC +
powerpc-cpu-v0.06), Math library functions (GLIBC + powerpc-cpu-v0.06 or later).
Also additional power 5 and power 4 optimizations may be included.
2. Feature Details:
Arch Specificity: Purely Arch Specific Code
Affects Toolchain: Yes
Delivery Mechanism: Direct from community
Request Type: Toolchain - Enhancement from IBM
d. Upstream Acceptance: Accepted
Sponsor Priority 1
f. Severity: High
IBM Confidential: no
Code Contribution: IBM code
g. Component Version Target: glibc 2.7+
Performance Assistance: yes
3. Business Case
Improved performance of POWER6 for High Performance Computation and Enterprise
4. Primary contact at Red Hat:
5. Primary contacts at Partner:
Project Management Contact:
Michael Hohnbaum, firstname.lastname@example.org, 503-578-5486
Steven Munroe, email@example.com
Alexander Johnson, firstname.lastname@example.org
RHEL 6 will include a newer glibc than 2.7, so this shouldn't be an issue.
The feature requested has already been accepted into the upstream code base
planned for the next major release of Red Hat Enterprise Linux.
When the next milestone release of Red Hat Enterprise Linux 6 is available,
please verify that the feature requested is present and functioning as
As far as we know, everything of interest to this feature is currently upstream.
Fixed in 'glibc-2.10.90-26', included in compose 'RHEL6.0-20091028.0'.
Moving to ON_QA.
------- Comment From email@example.com 2010-05-07 16:12 EDT-------
Verified in RHEL-6.0-Snapshot-2
ls -la /lib/power6
drwxr-xr-x. 2 root root 4096 Apr 26 19:52 .
dr-xr-xr-x. 14 root root 4096 May 4 15:09 ..
-rwxr-xr-x. 1 root root 2010200 Feb 25 07:34 libc-2.11.1.so
lrwxrwxrwx. 1 root root 14 Apr 26 19:52 libc.so.6 -> libc-2.11.1.so
-rwxr-xr-x. 1 root root 904524 Feb 25 07:34 libm-2.11.1.so
lrwxrwxrwx. 1 root root 14 Apr 26 19:52 libm.so.6 -> libm-2.11.1.so
-rwxr-xr-x. 1 root root 170164 Feb 25 07:34 libpthread-2.11.1.so
lrwxrwxrwx. 1 root root 20 Apr 26 19:52 libpthread.so.0 -> libpthread-2.11.1.so
-rwxr-xr-x. 1 root root 80952 Feb 25 07:34 librt-2.11.1.so
lrwxrwxrwx. 1 root root 15 Apr 26 19:52 librt.so.1 -> librt-2.11.1.so
-rwxr-xr-x. 1 root root 73756 Feb 25 07:34 libthread_db-1.0.so
lrwxrwxrwx. 1 root root 19 Apr 26 19:52 libthread_db.so.1 -> libthread_db-1.0.so
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.