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Texstar
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« on: September 18, 2010, 12:38:36 AM » |
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prelink is a free program written by Jakub Jelínek of Red Hat for POSIX-compliant operating systems, principally Linux (because it modifies ELF executables). It is intended to speed up a system by reducing the time a program needs to begin. Actual results have been mixed, but it seems to aid systems with a large number of libraries, such as KDE. 1. Install prelink from Synaptic Package Manager 2. Open terminal konsole su to root and type /usr/sbin/prelink -avmR 3. While still in terminal edit /usr/bin/startkde with your favorite text editor. Add the line highlighted in bold to startkde. export KDE_NO_IPV6=True export KDE_USE_IPV6="no" export KDE_IS_PRELINKED=1Save the file and exit. 4. Reboot and see if your applications launch faster. Security Bonus: prelink is capable of randomly selecting the address base that libraries are loaded at. This makes it more difficult to perform a return-to-libc attack on the system, because the addresses used are unique to that system. * Not responsible if this causes your system to crash and burn. *  |
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Old-Polack
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----IOFLU----
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« Reply #1 on: September 18, 2010, 12:42:24 AM » |
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This was a great post... until the last line.  |
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Old-Polack Of what use be there for joy, if not for the sharing thereof?  Lest we forget...  |
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gseaman
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« Reply #2 on: September 18, 2010, 12:45:33 AM » |
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Time to burn my system!
Galen
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Texstar
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« Reply #3 on: September 18, 2010, 12:50:32 AM » |
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I've noticed Firefox and Thunderbird are quicker to start on my system course it could be a jedi mind trick. Still playing... |
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gseaman
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« Reply #4 on: September 18, 2010, 01:05:39 AM » |
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I have no scientific verification, but it seems faster. And nothing burned. I guess I can go to bed now.  Galen |
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smcs_steve
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« Reply #5 on: September 18, 2010, 02:03:13 AM » |
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No difference here on FF..... but some other apps do appear faster to launch.
I like the security aspect though.
>Steve
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pinoc
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« Reply #6 on: September 18, 2010, 04:04:28 AM » |
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applied to fullmonty and applications seem to start a bit snappier now. Don't know if this is critical but while running "/usr/sbin/prelink -avmR " I got this: [root@localhost ~]# /usr/sbin/prelink -avmR
/usr/sbin/prelink: "/usr/bin/unetbootin" has no section headers
/usr/sbin/prelink: /usr/bin/fglrx_xgamma: Could not find one of the dependencies
/usr/sbin/prelink: /usr/bin/q4wine-cli: Could not find one of the dependencies
/usr/sbin/prelink: /usr/bin/jahshaka: section file offsets not monotonically increasing
/usr/sbin/prelink: /usr/bin/q4wine: Could not find one of the dependencies
/usr/sbin/prelink: /usr/bin/q4wine-helper: Could not find one of the dependencies
/usr/sbin/prelink: /usr/bin/xara-extreme: section file offsets not monotonically increasing
/usr/sbin/prelink: /usr/games/gltron: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/R/bin/exec/R: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/pokerth-0.7.1/pokerth: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/celtx/celtx-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/googleearth/googleearth-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/kompozer/xpcshell: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/kompozer/kompozer-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/kompozer/TestGtkEmbed: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/torcs/torcs-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/torcs/trackgen-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/torcs/texmapper-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/torcs/accc-bin: Could not find one of the dependencies
/usr/sbin/prelink: /usr/lib/torcs/nfsperf-bin: Could not find one of the dependencies
Laying out 1268 libraries in virtual address space 41000000-50000000
Random base 0x44968000
/usr/sbin/prelink: Could not find virtual address slot for /usr/lib/grass64/lib/libgrass_sim.so
[root@localhost ~]#
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AndrzejL
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« Reply #7 on: September 18, 2010, 09:50:16 AM » |
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It should be: dbus-launch kwrite /usr/bin/startkde Rebooting. Andy |
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Texstar
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« Reply #8 on: September 18, 2010, 09:53:04 AM » |
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It should be: dbus-launch kwrite /usr/bin/startkde Rebooting. Andy An advanced user would know that! |
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Follow the development of PCLinuxOS on TwitterHelp fund the PCLinuxOS project! "I'm not so good on advice, can I interest you in a sarcastic reply?" |
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AndrzejL
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« Reply #9 on: September 18, 2010, 09:57:02 AM » |
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It should be: dbus-launch kwrite /usr/bin/startkde Rebooting. Andy An advanced user would know that! Sowwy...  ! Feel free to remove my post ! Can't prove it but it feels snappier... Andy EDIT: Woah... Was I just called an advanced user by Texstar himself?! WOW!  |
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menotu
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« Reply #10 on: September 18, 2010, 10:28:44 AM » |
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My KMenu opens really fast - it now opens immediately (before there was a very slight "hesitation") and Dolphin is opening folders with lots of files in them a lot quicker.
Useful little tweak.
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If you can keep you head while all around you are losing theirs, then you have misunderstood the situation.
PCLinuxOS 32bit & 64bit; 3.2.17bfs kernel, KDE 4.8.3; nvidia 295.53, Athlon 64 X2 4200+; 4GB Ram; NVidia GeForce 8400GS 1GB; x.org 1.10.4 ; 500GB/320GB
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Texstar
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« Reply #11 on: September 19, 2010, 02:10:36 AM » |
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I can see the difference a lot more when launching applications in a non-kde desktop such as enlightenment.
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Follow the development of PCLinuxOS on TwitterHelp fund the PCLinuxOS project! "I'm not so good on advice, can I interest you in a sarcastic reply?" |
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Old-Polack
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----IOFLU----
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« Reply #12 on: September 19, 2010, 02:27:45 AM » |
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I can see the difference a lot more when launching applications in a non-kde desktop such as enlightenment.
Unless you changed something else in the last batch of upgrades, I just noticed, after running prelink and rebooting, that my GUI screen came back up on tty7 again, after being on tty8 since the earlier big batch of upgrades.  |
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Old-Polack Of what use be there for joy, if not for the sharing thereof? Lest we forget... |
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Hootiegibbon
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« Reply #13 on: September 19, 2010, 03:46:23 AM » |
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It should be: dbus-launch kwrite /usr/bin/startkde Rebooting. Andy An advanced user would know that! Sowwy... ! Feel free to remove my post ! Can't prove it but it feels snappier... Andy EDIT: Woah... Was I just called an advanced user by Texstar himself?! WOW! Andy, He wasn't saying that, what my interpretation would be is Andy, an advanced user would know that, without resorting to a search first....  lol I jest of course. I have noticed an increase in responsiveness, cool stuff Texstar! EDIT further reading for those interested http://linux.die.net/man/8/prelinkJase |
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menotu
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« Reply #14 on: September 19, 2010, 04:52:05 AM » |
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Nice link Jase - many thanks |
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If you can keep you head while all around you are losing theirs, then you have misunderstood the situation.
PCLinuxOS 32bit & 64bit; 3.2.17bfs kernel, KDE 4.8.3; nvidia 295.53, Athlon 64 X2 4200+; 4GB Ram; NVidia GeForce 8400GS 1GB; x.org 1.10.4 ; 500GB/320GB
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