Bug 1149865

Summary:	Slow gstack performance
Product:	[Fedora] Fedora	Reporter:	Sergio Durigan Junior <sergiodj>
Component:	gdb	Assignee:	Sergio Durigan Junior <sergiodj>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	20	CC:	btotty, gbenson, jan.kratochvil, mjw, palves, pmuldoon, sergiodj, tromey
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	gdb-7.7.1-21.fc20	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1103894
Clones:	1149866 (view as bug list)		Environment:
Last Closed:	2014-10-29 11:02:58 UTC	Type:	Bug
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:	1149866

Description Sergio Durigan Junior 2014-10-06 19:18:21 UTC

"/usr/bin/gstack is a script which invokes gdb and it's slow. Especially for threaded C++ apps."

Background:
 
  Most of the time is spent reading the symbols and unwinding the stack for each thread. 
  GDB maintains 3 different symbol tables which causes the slowness.

  There is a discussion about speed/performance from sourceware.org:
  https://sourceware.org/gdb/wiki/SymbolHandling?highlight=%28faster%29

--- Additional comment from Jan Kratochvil on 2014-07-15 11:24:03 EDT ---

Upstream PR
  http://sourceware.org/bugzilla/show_bug.cgi?id=16405

--- Additional comment from Jan Kratochvil on 2014-10-01 15:50:28 EDT ---

[patch] Fix 100x slowdown regression on DWZ files
https://sourceware.org/ml/gdb-patches/2014-10/msg00020.html

Comment 1 Fedora Update System 2014-10-06 20:08:13 UTC

gdb-7.7.1-20.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/gdb-7.7.1-20.fc20

Comment 2 Fedora Update System 2014-10-08 18:58:10 UTC

Package gdb-7.7.1-20.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing gdb-7.7.1-20.fc20'
as soon as you are able to.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2014-12309/gdb-7.7.1-20.fc20
then log in and leave karma (feedback).

Comment 3 Fedora Update System 2014-10-21 06:42:59 UTC

gdb-7.7.1-21.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/gdb-7.7.1-21.fc20

Comment 4 Fedora Update System 2014-10-29 11:02:58 UTC

gdb-7.7.1-21.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.