Difference between revisions of "Performance"

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m (Known areas for impovement)
m (Helpful tooling)
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* [[valgrind]] - debug / trace memory usage
 
* [[valgrind]] - debug / trace memory usage
 
* [[speedprof]] - a quick / hackish sampling full-stack-trace profiler & visualisation tool
 
* [[speedprof]] - a quick / hackish sampling full-stack-trace profiler & visualisation tool
 +
* [[APPR]] - a performance regression tool suite
  
 
== Approaches being worked on ==  
 
== Approaches being worked on ==  

Revision as of 21:52, 15 December 2005

Known areas for improvement

system issues

  • Linux / Linking - relocation processing is very slow two 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.
  • Linux / I/O scheduling & pre-loading is poor

General I/O & memory issues

  • Config mgr - scattered files
  • UI configuration - tons of scattered files
  • .rdb files - loads of empty space, mmap + random access pattern

Helpful tooling

Approaches being worked on

  • Config refactor - reduce seeks/files, better caching
  • Disk Access
  • -Bdirect linking
  • FIXME - Malte - we should really have your list embedded here ...

Other Pages

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

Personal tools