Difference between revisions of "Performance"

Revision as of 03:38, 1 February 2008

As George Ou has famously said, "It doesn't matter how fast the CPU is, OpenOffice is just bloated."

Project Summary

Project will achieve the goal: maintain good performance and evaluate OOo.

OOo Issues

Issues from End-User

...

Known areas for improvement

Component issues

Calc - lots to do
Writer
Impress
Base - lots to do

system issues

Linux / Linking - relocation processing is very slow ( ogg video, odp slides ) several possible ways to fix that
- re-ordering symbol & elf hash tables to improve cache locality, lots of good & simple ideas here.
- -Bdirect implementation [1] - gaining little traction.
- exporting Vague linkage more cleverly & using RTLD_LOCAL where possible
- basic linker optimizations:
  - don't export *UND* in .hash table
  - sort syms & dynsym entries more intelligently
  - .hashvals optimisation
Linux / I/O scheduling & pre-loading is poor

General I/O & memory issues

Image strip layout - our images strips are huge & unwieldy, layed out horizontally and are 'cached' in scattered files - this is fixed in CWS ka009, which never seems to get integrated.
Configuration information scattered across many files
UI configuration - tons of scattered files
.rdb files - loads of empty space, mmap + random access pattern

Helpful Tooling and Resources

Test Environment

Popular reference configuration(use similar env on Berlin and Beijing)

CPU:    Core2 Duo 1.5~2G
Memory: 512M
OS:     WindowsXP HOME

Test & Tuning Tools

Linux/cold-start simulator
relocstat - dump relocation data
RTL_LOGFILE - export RTL_LOGFILE=/tmp/foo
valgrind - debug / trace memory usage
speedprof - a quick / hackish sampling full-stack-trace profiler & visualisation tool
APPR - a performance regression tool suite
Performance Related Test Documents

Benchmarks & Description

If you have some benchmarks, share them here!

Performance Test Results Distribution

Test results for Different Versions

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Contrastive Data & Analysis

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Work List and Progress

Configmgr re-factor, reduces locking overhead & memory usage cf. CWS configrefactor01
XML Load
Config refactor - reduce seeks/files, better caching
Disk Access
-Bdirect linking
FIXME - Malte - we should really have your list embedded here ...

Integrated improvements

Integrated_Performance_Improvements

Other Pages

This Wiki page should become the ultimate authority on performance issues. Meanwhile, here are links to performance informationat other places

@@ Line 34: / Line 34: @@
 == Helpful Tooling and Resources ==
-=== Standard Test Environment ===
+=== Test Environment ===
-...
+Popular reference configuration(use similar env on Berlin and Beijing)
+ CPU:    Core2 Duo 1.5~2G
+ Memory: 512M
+ OS:     WindowsXP HOME
 === Test & Tuning Tools ===
@@ Line 48: / Line 51: @@
 === Benchmarks & Description ===
+If you have some benchmarks, share them here!
+== Performance Test Results Distribution ==
+=== Test results for Different Versions ===
+...
+=== Contrastive Data & Analysis ===
 ...
-== Approaches being worked on ==
+== Work List and Progress ==
 * Configmgr re-factor, reduces locking overhead & memory usage cf. CWS configrefactor01
 * [[XML Load]]