Bug 977887 - Fix libm performance regression due to set/restore rounding mode
Summary: Fix libm performance regression due to set/restore rounding mode
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: glibc
Version: 19
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Siddhesh Poyarekar
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-06-25 14:21 UTC by Siddhesh Poyarekar
Modified: 2016-11-24 12:13 UTC (History)
9 users (show)

Fixed In Version: glibc-2.16-33.fc18
Doc Type: Bug Fix
Doc Text:
Clone Of: 976624
Environment:
Last Closed: 2013-06-29 18:06:14 UTC
Type: Bug


Attachments (Terms of Use)

Description Siddhesh Poyarekar 2013-06-25 14:21:59 UTC
+++ This bug was initially created as a clone of Bug #976624 +++

Description of problem:

Some libm functions implement only rounding to nearest, so to ensure correctness they set and restore the default rounding mode.  This is unnecessary in the default case and is hence a performance impediment.  Upstream has solved this by calling the set/restore code only when the current rounding mode is not the default.  Backport that fix.

Comment 1 Fedora Update System 2013-06-25 17:11:52 UTC
glibc-2.16-33.fc18 has been submitted as an update for Fedora 18.
https://admin.fedoraproject.org/updates/glibc-2.16-33.fc18

Comment 2 Fedora Update System 2013-06-25 17:24:59 UTC
glibc-2.17-11.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/glibc-2.17-11.fc19

Comment 3 Fedora Update System 2013-06-25 17:27:14 UTC
glibc-2.17-11.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/glibc-2.17-11.fc19

Comment 4 Fedora Update System 2013-06-25 17:28:08 UTC
glibc-2.17-11.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/glibc-2.17-11.fc19

Comment 5 Fedora Update System 2013-06-25 17:31:36 UTC
glibc-2.17-11.fc19 has been submitted as an update for Fedora 19.
https://admin.fedoraproject.org/updates/glibc-2.17-11.fc19

Comment 6 Fedora Update System 2013-06-26 17:10:04 UTC
Package glibc-2.17-11.fc19:
* should fix your issue,
* was pushed to the Fedora 19 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing glibc-2.17-11.fc19'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2013-11737/glibc-2.17-11.fc19
then log in and leave karma (feedback).

Comment 7 Fedora Update System 2013-06-29 18:06:14 UTC
glibc-2.17-11.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 8 Fedora Update System 2013-07-08 00:54:10 UTC
glibc-2.16-33.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.


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