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tmpfs status

From: Maksym Planeta
Subject: tmpfs status
Date: Mon, 26 Mar 2012 21:31:45 +0300
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)


I'm currently working on getting tmpfs work on the Hurd. I already asked
on IRC to make or suggest some test for tmpfs. Last time Thomas Schwinge 
suggested me to compile packages and thanks to that a found some bugs. 
Now they are seems to be fixed, so I ask once more to make/suggest some
tests. Current version tmpfs is available in my branch in GNU/HURD git

I also made some performance tests. First was measuring time of working 
command "apt-get source elinks". Approximately half time of working of 
this command takes extracting files from archive. Second test was
measuring time for command "dpkg-buildpackage -b -nc". I've tested 
tmpfs, ext2fs that mounted on ramdisk and usual ext2fs. Results are in 
following table:

                    apt-get          dpkg-buildpackage  
ramfs+ext2fs          22s                 50m
ext2fs                32s                 46m
tmpfs                 16s                 47m

So, although tmpfs has advantage in speed, it doesn't give much gain in
task, like compiling packages.

1. http://git.savannah.gnu.org/cgit/hurd/hurd.git/log/?h=mplaneta/tmpfs/master 

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