General :: Run Firefox Jailed Without Serious Performance Loss?
Feb 20, 2011
My Firefox configuration is tricky:
Firefox runs at separate restricted user account which cannot connect to main X server.
Firefox uses Xvfb (virtual "headless" X server) as X server.
x11vnc is running on that Xvfb.
On the main X server there is vncviewer running that connect to this x11vnc
On powerful laptop (Acer Extensa 5220) it seems to work more or less well, but on "Acer Aspire One" netbook it is slowish (on a background that firefox is loaded with lots of extensions).How to optimise this scheme? Requirements:
Browser cannot connect to main X server.
Browser should be in chroot jail (no "suid" scripts, readonly for many things)
Browser should have a lot of features (like in AutoPager, NoScript, WoT, AdBlockPlus)
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Jun 16, 2010
Since I upgraded to Slackware64 13.1 my system feels slower than before (Slackware64 13.0).I paid attention to the documentation (changes_and_hints.txt, readmes etc.) regarding the update. The only thing I changed is, that I used the KDE-4.4.4 packages of AlienBob instead of the KDE-4.4.3 packages of Slackware.
But since AlienBob at his blog wrote, "Although it seems (by looking at the changelog between 4.4.3 and 4.4.4) that there were no spectacular updates in the latest stable KDE Software Compilation, I got some feedback that 4.4.4 does feel �snappier� than the 4.4.3 which is part of Slackware 13.1.", I thought it would be a good idea to use these packages.
I also recognized a few crashes in KDE, which I didn't have before so often. Therefore I moved the .kde to .kde_bak and configured kde new. This improved the behaviour regarding the crashes, but it still seems not that stable to me like the KDE 4.2 in Slackware64 13.0.Did anyone recognize similar problems after the upgrade, or can give some hints how to solve it?
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Jun 29, 2011
I see a huge performance loss in compiz in 11.04 with two event:1.Switching workspace2.Resize windowFor the workspace, by switching very fast form workspace to another, frame per second depend by the number of window:
0 Window: 60 frame/sec
1 Window: 30 frame/sec
2 Window: 22 frame/sec
[code]....
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Aug 5, 2011
I have ubuntu lucid running on Dell 230 PC, linksys WPN600 N wireless PCI network card connecting to a Cisco E3000 dual channel router.
Kernel: 2.6.32-33-generic
Installed Ralink driver v2.4.0.0
iwconfig shows that the bit rate is 130Mb/s and link quality is 98/100. I'm using the wcid network manager instead of defaul gnome one. I'm getting lots of packet loss and performance is very bad. The connection is practically unusable. I've tried installing the compat wireless backport package but that did not work at all.
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Sep 26, 2010
When I go into firefox I loss the menu bar at the top for some reason. I can minimise or open another application while in Firefox and to shut down have to close firefox first. how to get back the menu so I can see it again?Seems to happen in firefox only but not other programs.I can't seem to change text now. Should read "lost general xubuntu menu...
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May 25, 2011
Just curious if anybody else had experienced Firefox being slightly sluggish in the new release of Ubuntu? I'm running 64-bit Ubuntu on a Dell laptop (Inspiron 1445) with a fresh install of Ubuntu 11.04 on it. I haven't touched or messed with any of the settings.
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Dec 26, 2009
I have fedora 12 and since I started using firefox I noticed that it performs very slow. Slow when opening, when displaying information etc..I thought that there was something wrong with my wireless device but I installed opera and it works very fast. The strange thing is that before that I installed google chrome and also worked very slow for me.
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Nov 20, 2010
I would like to report an issue regarding Mozilla Firefox in ubuntu 10.10. Continuously, a slow performance is experienced whenever I am trying to browse through the web. It takes about 20 sec to load a page. This issue was always existed in my system even when I was using the previous version of Ubuntu, 10.04. Is there any solution about it?
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Jan 1, 2011
I posted a few weeks ago about Flash performance in Firefox vs. Google Chrome. Thanks to all those who responded. I finally figured out the problem in Firefox, it was Compiz desktop effects. With effects off, flash in Firefox is just as fast as Google Chrome. I am not sure why Compiz only affects Firefox Flash, but apparently Chrome is not affected. I know there are a lot of posts about this topic, so before driving yourself nuts installing FlashAid, and running terminal commands, try disabling desktop effects first.
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Jul 31, 2010
I just wanted to know if having my laptop set to ondemand, will this affect performance in any way? I realize it increases the clock speed to performance when the CPU is under load, but does the time it take to go from ondemand to performance affect speed? Will there be any noticeable difference between the two setups? I have a dual core intel at 2.2GHz when in performance. When ondemand is set with no load it downclocks to 800Mhz.
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Jun 19, 2010
I accidentally deleted all the files from file system in my hard drive (thankfully not my /home since it resided on a separate hdd). I did this from another system while I had connected that hdd to look at some files since my system was not booting correctly. The problem is that I deleted everything (manually while I was in nautilus) including the .Trash file. I have not formatted this drive so the partition table remains the same, nor have I written anything to it since the deletion, and, this drive is using ext4. What is the best way to restore this drive to how it was (say yesterday at 4:30PM)? (I have a lot of programs installed and I have been upgrading Ubuntu there since 9.04 to now 10.04). If I am not mistaken when data is deleted in ext4 it is simply flagged as usable space, and if that is so, is it possible to just simply unflag this data to get every file back the way it was yesterday at 4:30PM?
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Oct 15, 2010
Not sure this right place for this. After updating from Ubuntu 10.04 to 10.10 lost internet connection - was instantaneous loss. Wired connection computer to router. Icon on computer shows "wired connection 'auto Eth0'active" The router shows line connected ok. Computer shows connection is established. Connection information menu shows details such as IP address broadcast address and other details. Where do I go from here to reconnect to internet.
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Jun 25, 2010
I'm running 32 bit Ubuntu 10.04 with 2GB RAM. Is my processor (AMD Athlon 64 X2) running sub-optimally?Given that a larger addressing space will make no difference to me (right now) would there be a performance gain or any other advantage to switching to 64 bit Ubuntu.
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Jul 9, 2010
I'm looking for a tool for Debian Linux that can measure the synchronisation performance between two desktops.
I'm using RADClock instead of the NTP client to synchronise my desktops.
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Apr 24, 2011
Modern systems seem to be EFI based, and while there's a specific version of lilo that works with it, i can't seem to find any mention of a efi varient of grub (edit - on modern debian derivative systems there's grub-efi. Most references to it seem to be about various bugs in/for it tho) . In general, how well is EFI supported on linux?In addition, apparently windows 7 uses EFI to enable faster boot - 12 seconds or so with some systems. While a properly tweaked linux system could probably come close, are there any enhancements to the linux booting procedure that take advantage of EFI?
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Aug 26, 2011
I have a machine that I want to install Nessus on it.
Nessus supports many Operating Systems:
Microsoft Windows
Mac OS X
Linux
FreeBSD
The full list is here: [URL]... What would the best OS to install Nessus on for performance be?
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Feb 1, 2011
I have recently upgraded to a M4A77TD motherboard and 8Gig of memory.I have a AMD Athlon(tm) II X4 645 Processor, and I cant say that I see much improvement over the one that died. I have noticed that the HDD light is constantly flashing so I wondered if I couldnt use some of the Ram to create a ramdrive to speed things up . So ..my question ... what should I put on my ramdrive? My own thoughts were the var and usr directories. I would load the ramdrive at startup (which would slow down my startup) And Rsync back again on shutdown.Has anyone done this? Ive had a look through the forum but cant see anything ..but my search terms may not be all that good.
suse linux 11.1 64 bit
var=0.3G usr=5M lib=0.2G opt=0.6G sys=0.6G
As far as I can see swop is never used
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May 8, 2011
Does anyone here has any experience with the proprietary compilers? OpenWatcom, Intel and Pathscale? Does the performance gain is noticeable regarding the gcc...?In number crunching applications, i may say that ifort/ icc/ mkl yeld faster binaries than gcc.has anyone here already tinkered with OpenWatcom/PathScale...?
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Jun 8, 2011
what is High Performance computing and its uses.
what is active active and passive passive cluster ?
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Feb 15, 2011
I have written a script as follows which is taking lot of time in executing/searching only 3500 records taken as input from one file in log file of 12 GB Approximately. Working of script is read the csv file as an input having 2 arguments which are transaction_id,mobile_number and search the log file having these two strings with one more static string that is "CustomCDRInterceptor",then format the searched data in prescribed format.
Code of script written is as follows:
Code:
Sample data of input file will be like :
Code:
Sample Data in log file is as follows:
Code:
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Mar 18, 2011
I'm using mplayer and libcaca on Gentoo. My framebuffer (uvesafb) is running at 1920x1200 (I don't know how many characters that is) and mplayer has problems filling up the screen, so video and audio lose synchronization.
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Jan 19, 2010
Is there a 'top' like command for monitoring the GPU and memory usage of a video card? I am most interested in Linux commands, but and OS would be interesting. I strongly suspect that for a group of my systems the video cards are being under-utilized (but I have no idea by how much) and would like to re-allocate funds to other bottle-necks. We are using higher end cards, so the price difference between cards is significant.
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Apr 9, 2010
I've recently been experimenting with glxgears, but found people saying this is not an ideal benchmark tool as there are many variants; for example resizing the window affects the FPS tremendously.
I'm interested in testing the difference between using the proprietary ATI driver and the open source driver and also the performance under various distributions.
What's the best software to benchmark graphics cards?
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Oct 19, 2010
I am running openSuse 11.2 (32-bit), my CPU only supports 32-bits. I have a hardware RAID device. My system has 4GB of RAM. When I configure my system to only use 3GB, 2GB, or even 1GB, using mem=1024M in grub, my RAID performance is much better then when letting my system use the default 4GB available.Can anyone explain to me why this is? Is there anything I can do, i.e. kernel configuration, that will help performance when running with all 4GB enabled?
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Mar 3, 2011
if I make more partitions rather than creating single one, will I get more data access performance? E.g Instead of keeping 1,5TB partition, create 5x300MB and keep different data in different partitions? Logically hard drive will spend less time on finding data in smaller partition then in bigger one, right? Is there any statistics for performance vs size?
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Sep 7, 2010
I have a 64-bit computer but 64-bit distros have been giving me huge problems when using 32 bit apps or trying to install 32-bit libraries, so I think I'm going to just switch to 32 bit. Will I notice much of a hit in performance? This computer is mostly used for web and games, nothing particularly cpu-intensive (no graphics rendering, etc)
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Jul 14, 2010
I ahve installed Nagios 3.2.1 and to generate performance graphs i am trying to use opmon [URL] there are three utilities required to generate graphs: I have installed all prerequisites successfully.
opcfg
opcp
opdb
Here i have installed opcfg successfully and working good, For opcp requirement is "opdb" but no proper documentation available. But while compiling opdb from command
gcc -D_GNU_SOURCE -Wall -shared -o opdb.o opdb.c -L/usr/lib/mysql -lmysqlclient -DNSCORE
Its giving error: Please see attached file For thsi also no proper documentation available.
is there any other easy way to generate performance graphs from Nagios.
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Sep 25, 2010
I need someone to please point me in the right direction with this. I'm using a supposedly nice graphics card under Ubuntu 9.10, an Asus GeForce GTS 250 1GB Dark Knight, and I think I'm getting a poor performance out of it. I realized this when "backing up" some movies I have on DVD and took more than 30 min with k9copy for each DVD.
The CPU is a AMD Phenom II 955 X4 Quad Core 3.2Ghz Black Ed. 125W AM3. Which I think is powerful enough for not to be a bottleneck. Maybe there is nothing wrong with the graphics card and the bottleneck is somewhere else. I provably should benchmark my system to find out if I'm not taking advantage of my hardware. I've seen phoronix has a test suite. Any other recommendations?
[Code]...
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Jun 4, 2011
I am making comparison between tora , dsr , dsdv and aodv. There is some error in tora.tcl protocol. Rest is working fine..why the tora.tcl is popping the error?
Error is given below:-
Code:
num_nodes is set 6
INITIALIZE THE LIST xListHead
(_o22 cmd line 1)
invoked from within
"_o22 cmd port-dmux _o37"
invoked from within
"catch "$self cmd $args" ret"
invoked from within
"if [catch "$self cmd $args" ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error "error when calling class $cls: $args" $..." .....
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Jul 11, 2010
I attended many interviews for Linux Admin post. Most of them asked me a common question 'How do you handle System Performance Issues' on a Linux Server. Now how do I answer this?
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