Bug Hunting Session
Bug 38809 - Analyse/Improve Structure and Cache efficiency with DHAT/valgrind
Summary: Analyse/Improve Structure and Cache efficiency with DHAT/valgrind
Status: NEW
Alias: None
Product: LibreOffice
Classification: Unclassified
Component: LibreOffice (show other bugs)
Version:
(earliest affected)
unspecified
Hardware: Other All
: medium normal
Assignee: Not Assigned
URL:
Whiteboard:
Keywords: difficultyInteresting, easyHack, skillCpp
Depends on:
Blocks:
 
Reported: 2011-06-30 06:54 UTC by Björn Michaelsen
Modified: 2017-02-14 08:58 UTC (History)
3 users (show)

See Also:
Crash report or crash signature:


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Description Björn Michaelsen 2011-06-30 06:54:15 UTC
Improve Structure / Cache efficiency

Background: there is a new (experimental) valgrind tool called 'DHAT, a dynamic heap analysis tool'. It generates output a little like this. The data is rather hard to interpret, and has some false positives (eg. the opendir hits), but can point to large chunks of memory that are allocated written to, but then never read from, or identify holes in frequently used structures, and so on. It would be great to do further analysis on the data, discuss it on the list, and then patch the various classes / structures / calls in most need.

Skills: building, C++ hacking, C++ ABI understanding, patience.
Comment 1 Florian Reisinger 2012-05-18 08:56:30 UTC
Deteted "Easyhack" from summary
Comment 2 Björn Michaelsen 2013-10-04 18:47:49 UTC
adding LibreOffice developer list as CC to unresolved EasyHacks for better visibility.

see e.g. http://nabble.documentfoundation.org/minutes-of-ESC-call-td4076214.html for details
Comment 3 Robinson Tryon (qubit) 2015-12-14 05:03:39 UTC Comment hidden (obsolete)
Comment 4 Robinson Tryon (qubit) 2016-02-18 14:52:32 UTC Comment hidden (obsolete)