diff options
Diffstat (limited to 'community')
| -rw-r--r-- | community/gsoc/project_ideas.mdwn | 5 | ||||
| -rw-r--r-- | community/gsoc/project_ideas/disk_io_performance.mdwn | 36 |
2 files changed, 3 insertions, 38 deletions
diff --git a/community/gsoc/project_ideas.mdwn b/community/gsoc/project_ideas.mdwn index ca10c8a2..2102e8f7 100644 --- a/community/gsoc/project_ideas.mdwn +++ b/community/gsoc/project_ideas.mdwn @@ -1,4 +1,5 @@ -[[!meta copyright="Copyright © 2008, 2009 Free Software Foundation, Inc."]] +[[!meta copyright="Copyright © 2008, 2009, 2010 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 @@ -84,7 +85,7 @@ See also the list of [Hurd-related X.org project ideas](http://wiki.x.org/wiki/H [[!inline pages="community/gsoc/project_ideas/libdiskfs_locking" show=0 feeds=no actions=yes]] [[!inline pages="community/gsoc/project_ideas/pthreads" show=0 feeds=no actions=yes]] [[!inline pages="community/gsoc/project_ideas/sound" show=0 feeds=no actions=yes]] -[[!inline pages="community/gsoc/project_ideas/disk_io_performance" show=0 feeds=no actions=yes]] +[[!inline pages="open_issues/performance/io_system" show=0 feeds=no actions=yes]] [[!inline pages="community/gsoc/project_ideas/vm_tuning" show=0 feeds=no actions=yes]] [[!inline pages="community/gsoc/project_ideas/mtab" show=0 feeds=no actions=yes]] [[!inline pages="community/gsoc/project_ideas/gnumach_cleanup" show=0 feeds=no actions=yes]] 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. |