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| author | Thomas Schwinge <thomas@schwinge.name> | 2010-03-28 21:48:46 +0200 |
|---|---|---|
| committer | Thomas Schwinge <thomas@schwinge.name> | 2010-03-28 21:48:46 +0200 |
| commit | 4b35fc7bdd7ab723cb3db8e9122ed08d996f33b4 (patch) | |
| tree | e4bb2ffadd136ab05b8abc3c0fa9f305f8c360fe /community/gsoc/project_ideas/disk_io_performance.mdwn | |
| parent | 34794c7002f679ab9c2d076284ff58288224c47d (diff) | |
| parent | 96611f76b833159bafeab3443229dfa690178d92 (diff) | |
Merge commit '96611f76b833159bafeab3443229dfa690178d92' into master-news_next
Conflicts:
news/2010-03-31.mdwn
Diffstat (limited to 'community/gsoc/project_ideas/disk_io_performance.mdwn')
| -rw-r--r-- | community/gsoc/project_ideas/disk_io_performance.mdwn | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/community/gsoc/project_ideas/disk_io_performance.mdwn b/community/gsoc/project_ideas/disk_io_performance.mdwn index bb047308..b6c857b0 100644 --- a/community/gsoc/project_ideas/disk_io_performance.mdwn +++ b/community/gsoc/project_ideas/disk_io_performance.mdwn @@ -11,21 +11,21 @@ is included in the section entitled [[!meta title="Disk I/O Performance Tuning"]] The most obvious reason for the Hurd feeling slow compared to mainstream -systems like GNU/Linux, is very slow harddisk access. +systems like GNU/Linux, is very slow hard disk access. The reason for this slowness is lack and/or bad implementation of common -optimisation techniques, like scheduling reads and writes to minimalize head +optimization techniques, like scheduling reads and writes to minimize head movement; effective block caching; effective reads/writes to partial blocks; reading/writing multiple blocks at once; and read-ahead. The [[ext2_filesystem_server|hurd/translator/ext2fs]] might also need some -optimisations at a higher logical level. +optimizations at a higher logical level. The goal of this project is to analyze the current situation, and implement/fix -various optimisations, to achieve significantly better disk performance. It +various optimizations, to achieve significantly better disk performance. It requires understanding the data flow through the various layers involved in -disk acces on the Hurd ([[filesystem|hurd/virtual_file_system]], +disk access on the Hurd ([[filesystem|hurd/virtual_file_system]], [[pager|hurd/libpager]], driver), and general experience with -optimising complex systems. That said, the killing feature we are definitely +optimizing complex systems. That said, the killing feature we are definitely missing is the read-ahead, and even a very simple implementation would bring very big performance speedups. |