diff options
| author | Thomas Schwinge <thomas@schwinge.name> | 2010-11-06 10:27:05 +0100 |
|---|---|---|
| committer | Thomas Schwinge <thomas@schwinge.name> | 2010-11-06 10:27:05 +0100 |
| commit | b7ba1377b7c712e42275f2c8055974dc2a48a0e4 (patch) | |
| tree | 030a4bdde1e3fcac1f4cb122672e3358f128b060 /community/gsoc/project_ideas | |
| parent | e4dce63f1d51611a0f123299680160a82f11e1ea (diff) | |
open_issues/performance: New.
Diffstat (limited to 'community/gsoc/project_ideas')
| -rw-r--r-- | community/gsoc/project_ideas/disk_io_performance.mdwn | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/community/gsoc/project_ideas/disk_io_performance.mdwn b/community/gsoc/project_ideas/disk_io_performance.mdwn deleted file mode 100644 index b6c857b0..00000000 --- a/community/gsoc/project_ideas/disk_io_performance.mdwn +++ /dev/null @@ -1,36 +0,0 @@ -[[!meta copyright="Copyright © 2008, 2009 Free Software Foundation, Inc."]] - -[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable -id="license" text="Permission is granted to copy, distribute and/or modify this -document under the terms of the GNU Free Documentation License, Version 1.2 or -any later version published by the Free Software Foundation; with no Invariant -Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license -is included in the section entitled -[[GNU Free Documentation License|/fdl]]."]]"""]] - -[[!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 hard disk access. - -The reason for this slowness is lack and/or bad implementation of common -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 -optimizations at a higher logical level. - -The goal of this project is to analyze the current situation, and implement/fix -various optimizations, to achieve significantly better disk performance. It -requires understanding the data flow through the various layers involved in -disk access on the Hurd ([[filesystem|hurd/virtual_file_system]], -[[pager|hurd/libpager]], driver), and general experience with -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. - -Possible mentors: Samuel Thibault (youpi) - -Exercise: Look through all the code involved in disk I/O, and try something -easy to improve. It's quite likely though that you will find nothing obvious -- -in this case, please contact us about a different exercise task. |