Fedora :: Dynamically Monitor Multi-core Cpu In Gnome?
Mar 13, 2009
Many people have multi-core cpus supporting frequency scaling now, if you want to see if the workload is being evenly distributed then add as many CPU Frequency Scaling Monitor applets to the Gnome panel as you have cores/cpus. Then right-click each one and select preferences and choose which cpu to monitor.
Now compile a large program or run a cpu intensive game and watch how the workload dances around between the two (hopefully)
Some clever apps like gnome chess will multi-thread and make max use of both cores, sadly many others won't.
I have a command line OCR program called OCR Shop XTR (Vividata corp) that I am using on a system with a 6-core AMD chip. I changed the bios so that the 6-cores were activated, but htop shows me that while the program is running, I am only getting activity on one core (the program maxes out the one core with consistent usage between 97% and 100%).
I have read that many programs are not written to take advantage of multiple core cpu's. However, I am just hoping that there is some way to get this program to take advantage of the extra cores. Does anyone know of a way to invoke programs from the command line which would spread the workload out among additional cores?
Here is the output of uname -a:Linux linux 2.6.37.1-1.2-desktop #1 SMP PREEMPT 2011-02-21 10:34:10 +0100 i686 athlon i386 GNU/LinuxAnd here is the output for one of the cores from cat /proc/cpuinfo:processor : 5
vendor_id : AuthenticAMD cpu family : 16 model : 10 model name : AMD Phenom(tm) II X6 1100T Processor stepping : 0
Im running 64bit centos 5.6 and using virt-manager.On one of my guest OS's, Windows 7, The max Physical CPUs is 2, you can have unlimited CPU Cores however. (like my machine i use for work has 1, 4 core processor).The issue im having is xen only allows you to set the vcpu arguemnet in your xen config file. How can i set it so that 1 CPU has several Cores just as windows would recognize this machine if i were installing directly to the hardware vs via a VM.Ive searched for 2 days staright trying to address this issue, very little progress, Does anyone know where a XEN support forum is? all i get is the citrix xen support forums.
here is the best info i have found on this, but i dont know how to change this for my CPU to work, when i enter this in my xen config it essentially ignores it and just takes the value of vcpu= so windows shows 2 CPUs each with ONLY one core. Id like 1 or 2 CPUS showing Several cores.The physical Hardware is 2x Xeon 5300 Quad Core CPUs.
> # Expose to the guest multi-core cpu instead of multiple processors > # Example for intel, expose a 8-core processor : > #cpuid=['1:edx=xxx1xxxxxxxxxxxxxxxxxxxxxxxxxxxx,[code]........
I've tried searching the forums / google and haven't been able to come up with anything... in Debian-based distros there's an option that can be set to allow boot concurrency so that multiple processor cores can be used for the boot process. Windows also has an option similar to this to specify how many processor cores to use for boot.
Is there an option for multi-core booting in Fedora?
Whenever I am in firefox and have pictures open in the browser and move the mouse to the other 19" monitor it crashes, not everytime but often enough to be annoying. Sometimes when it crashes the screen goes blank and I wind up at the login screen, other times it just goes blank and stays blank.
I cannot install Fedora core 10. It boots up and it gets to the Fedora 10 loading screen. After that it complains my monitor is out of Range and that's as far as I can go. I had originally thought I could get to some text install mode, but I don't make it far enough to do that.
I need to set the CR4.MCE bit for all the cores on my system (4). I'd like to write a linux kernel module for that, but I am not sure how to proceed: How do you sequentially access all of the CR4 registers? I have read the Intel manuals and they describe a way to initialize each core, but this is done in the bios.
I have written a simple script which has to find required patterns from a bunch of files ( where each file is around 2 GB each,which contain the output of seq 1 10000000000000) on an 8 core machine.I am current forking 6 child processes which run simultaneously on 6 cores of the processor & have to search for the required pattern in 6 different files & inform the parent process when a pattern is found using a PIPE.
The problem is,when a child process is done reading a text file looking for a pattern,it is becoming a zombie process.It exits cleanly when i put a $SIG{CHLD} = "IGNORE"; in the script.Can any one tell me whats going on & how do i improve the communication between child and parent processes?
I have installed OpenSuse 11.3 32 Bit in a virtual machine on an older computer on a Windows XP host and on a new computer with AMD Phenom II X4 965 processor.
With sysbench I tested the performance of mutex and on the new computer it is 3 - 4 times slower than on the virtual machine. Other performance tests with sysbench for CPU, memory and threads are faster on new computer like expected. I tested this, because I have a slower performance of table creation in MySql tested with sql-bench, where creation of 10000 tables lasts 45 seconds on the virtual machine but over 400 seconds on the new computer.
I have tested with kernel-desktop and kernel-default but there are not large differences. File creation was tested with bonnie++ and is on newer computer faster as expected.
My questions are: - Why is the mutex handling on the multi core CPU slower than in the virtual machine and how to speed up this? - Or is there another reason why table creation of MySql is so much slower on multi core CPU?
In my Open-Suse server I have a script, where makepasswd output(by default it generates similar passwords: cGyTbqpr, tpJ1LA, 33EXdo) is redirected to mkpasswd(which uses DES by default) in order to generate salted hash of this previously generated password. I would like to test the strength of this system. I have a quad core CPU, and if I start John The Ripper like this(I want to use -incremental:all flag):
john -incremental:all passwd
..only one core is utilized at 100%. Is there a possibility to make all four cores to crack this password? Or is this possible only after reprogramming John The Ripper? Or what is the algorithm for generating passwords with with -incremental:all flag? I mean if John generates passwords randomly in brute-force mode, then it's smart to start four different John processes simultaneously because then one of those four will find the password firs
I'm trying out Fedora 14 on an Asus EeePC 1000 netbook.I'd like to install just the basic Gnome interface, its helper applications and Gedit &cI don't want openoffice or evolution &c on this small net book.How would I go about choosing the appropriate packages at install time?If this is documented anywhere, just point me at the page!
I installed Gnome on my server using the gnome-core and xinit packages so I could use MySQL Workbench.I start up Gnome when I need it via startx./etc/init.d/gdm doesn't exist so I can't use gdm start or gdm stopHow can I stop Gnome and the X server in this situation?
I have not checked for a while but did, before posting this, do a search for multi monitor support with KDE 4.4.4 and found nothing.
From what I understand 11.3 is out sometime next month and KDE 4.4.4 is the KDE environment that will be released with that iteration of SUSe.
About a month ago I read about a number of problems with multiple monitor support under 4.4.4. Primarily these issues seemed to be with no more than 2 monitors. The SUSe 11.2 machine here uses KDE 4.3 runs three monitors (Intel core quad, pair of NVidia PCIe graphics cards). I was wondering whether any of the bugs with this type of configuration have been resolved. From what I understood 4.4.4 worked with problems using Twinview but I was not able to find anything that addressed the configuration of having separate X Screens.
I've been doing some computations at home and at work and have noticed some unexpected performance issues. The work machine is quite a bit more "serious" than the home machine, but sometimes the home machine outperforms the work machine. I'm curious what the dynamic is -- why this should be, and if I can tweak it at all.
Ultimately on both machines the computations are just a lot of very large arbitrary-precision integer linear algebra computations (based on the GNU multi-precision library). Reducing a lot of sparse but "large" integer matrices, finding the vertices on the boundary of high-dimensional polyhedra, and so on.
On my home computer (which has two cores), if I run a standard computation on only one core (the 2nd core near-idle), it takes 282s.
On the home computer running two identical parallel computations (the same computation as above), it takes approx 320s on each core.
On my office computer, with all cores essentially idle except for one core running this computation, it takes 196s.
On my office computer, if I have all 8 cores running full-out, and one of the cores is doing the computation above, it takes 356s on the one core that's running the computation.
Im running 11.2-64 with the stock KDE (3.5) included with the distro. Recently I messed about attempting an update of Amarok and phonon to get the graphic EQ back for music playback. The "messing about" was not with the one click install offered on the KDE website for 4.4.2.....and interestingly the messing about was the day before they "released" 4.4.2-- with the result that I ended up. trashing" the system and having to reload (didnt loose /home tho another reason why I love SUSe....)anyway I ve been looking around and have seen problems mentioned on the KDE forum with multi monitors in their 4.x desktop environment....it is tempting to "just push the button" on the 4.4.2 install and see what happens but Im not sure I want to spend another few hours here repairing things where I have my workspace back.
This machine is used in my home office, a core quad with 2 GB of RAM, Intel motherboard and a pair of NVidia GT 8500 PCIe cards running 3 monitors..... am curious if anyone is using 4.4.2 in a multi monitor environment, how the upgrade went and any problems with X server with the new environment?
I have 2 GPUs in my system, a HD4870 and a HD4350. The HD4870 has a Benq 24" and a Dell 17" which are working fine in a multi-display desktop setting (No Xinerama) configured via CCC. On the HD4350 I have a single Samsung 17" which in CCC is listed as '[Unknown Display] Unknown adapter' and cannot be used. How can I get that working properly so I can configure it as an additional screen in this setup?
I have tried a few different configurations in Xorg but I don't have a great understanding of the configuration files so I have broken it a few times. I have read through this guide [URL]. It's a guide based on the work around for multiple Nvidia GPUs with a six monitor configuration while still being able to run visual effects without a hitch. But I didn't continue after reading "If you're prepared to use ATI cards, and therefore deal with their drivers, a better option might be to buy an Eyefinity card." Since that is based on the drivers back then I figure maybe it's possible with ATI drivers now. I'm sticking to Ubuntu this time around there is no doubt there so I would really like to get my third monitor working.
I have two monitors of different resolutions. Under settings->display the settings for my monitor look like this: [URL]. Ultimately what I want is to set up this kind of configuration: [URL]. But whenever I do, it doesn't work out. When I up after setting the above settings, my configuration ends up like this: [URL]. Any attempt to change the resolution or to change the display type to anything other then clone is simply ignored. If I disable the second monitor I can set my first to the proper resolution. If I try to set the settings to what I want they will stick but the second monitor doesn't actually turn on, and if i try to drag windows that direction it acts like a single display.
I have tried using the ATI control panel to adjust my display, but there seems to be a problem entering it as an administrator.I can load the CCC just fine as a regular user, but when I try as an admin a terminal pops up, I type in my password, and nothing happens. I want to avoid trying to reinstall my display drivers or do anything drastic. In previous versions of linux I would just nano the Xorg.conf file and be done with it, but it seems ubuntu 10.04 LTS doesn't use Xorg, or at least not a Xorg.conf I am used to. I want to set the monitors at their native res and as independent displays, similar to what twin view did for me not to long ago.
I've been using my laptop with an external LCD monitor attached to it at work (Philips 201E). And at home with a different external monitor (Samsung 2032BW). I have an ATI graphics card (HD3450), with Ati Catalyst drivers enabled and I'm using the Single display desktop (Multi-Desktop) seeting. At work I have the external monitor on the left and laptop on the right, while at home the other way around. So when I switch between the two setups, I just needed to go to Ati Catalyst Control Center, change the order of the displays, change the resolution (Home - 1680x1050, Work - 1440x900), reboot and it was all fine.
But since a while it doesn't work properly anymore:
At home it *still* works fine. At work it doesn't work. Sometimes it works for some reason, after a few resolution/setting changes in ACCC and reboots... it's very strange and annoying. Does anyone have any idea for fixing it? I've uninstalled and reinstalled the ATI restricted drivers and that seemed to make it work initially, but it still works just sometimes. This is my xorg.conf currently:
I have a dual monitor setup with a nVidia 7300 card. I'm not sure exactly when this started to happen, but it's happened for a couple of years at least. when I'm in one or the other monitor the cursor will sometimes "stick" in that monitor and refuse to go to the other monitor. it'll just 'wrap around' as when I go to the right part of the monitor, it'll then jump to the left side, and vice versa. Also once in awhile, if I'm in one monitor, the cursor will be taken away and put on the other monitor. I'm just now starting to see a few patterns on what's happening. It's worse if I have VCL playing in the left monitor, (my secondary), and I've got a program maximized in the right (primary) monitor. That's when it'll 'stick' on the right monitor. After I roll up the program or minimize it, then it'll free the mouse. But it's not instant. After it's freed, it still doesn't work exactly. If you click on any program on the left monitor, then you have to move back and forth before the mouse will work on the left monitor.
The second problem I'm having happens only on the secondary monitor. At times the precision is WAY off. For example, if I try to put the mouse right on an icon, and click it. It won't work. But if I move the mouse over to the right or left, suddenly the pop-up comment box pops up, the icon is highlighted and clicking will run the program. It can be off as much as 100 pixels! I've seen these problems in all sorts of GUIs; XFCE, DXCE, KDE 3.x (I never tried it in KDE 4.x since it was nearly unusable) and Gnome. Right now I've only see this on Ubuntu 8.04.01, to 9.10 (I never went past 9.10), and at first I thought it was X since all GUIs had problems. But someone now says that nVidia's driver might be to blame. If you can tell me what command to type in at the terminal, I can supply the current video driver's version.
I have just bought 2 monitors to be used as a x3 multi setup and 2 graphics cards the same make and model (ATI Sapphire Radeon HD5450). This all works in Windows 7 but I have just booted into Ubuntu and removed the old nVidia drivers and got the supported driver. The problem is only 2 monitors are detected as it would seem that it's only picking up 1 card.
I use a Dell advanced port replicator at home and in the office. Each is connected to a second monitor. In neither place does the monitor actually receive a signal even though the monitor seems to be detected correctly in display settings. The function-F8 key does not have any visible effect.
Oh, almost forgot. At work once when I preparing to shut down the second monitor popped on for a few seconds though it was at the wrong resolution.
I've been using my laptop with an external LCD monitor attached to it at work (Philips 201E). And at home with a different external monitor (Samsung 2032BW).I have an ATI graphics card (HD3450), with Ati Catalyst drivers enabled and I'm using the Single display desktop (Multi-Desktop) seeting. At work I have the external monitor on the left and laptop on the right, while at home the other way around. So when I switch between the two setups, I just needed to go to Ati Catalyst Control Center, change the order of the displays, change the resolution (Home - 1680x1050, Work - 1440x900), reboot and it was all fine.
But since a while it doesn't work properly anymore: At home it still works fine. At work it doesn't work. Sometimes it works for some reason, after a few resolution/setting changes in ACCC and reboots... it's very strange and annoying. With the home monitor I can see the whole bootup process on both monitors (laptop + LCD) and it always just works fine. With the work monitor on the external LCD monitor I just see "No video input" until I get to the login screen, then it shows up there as well. But after login it will either:
I am running a multi monitor setup with xinerama, and everything works great except when I try to play an FPS such as OpenArena. The mouse doesn't work, it gets stuck to the screen edge.
I am using lenovo laptop and I have docking system, to extend another monitor on my desk for display.
Laptop 15.6 inch: 1600-900(16:9) Acer 21 inch : 1920x1080 (16:9)
How to setup in fedora, so I can have both monitor display same screen, with respect of their resolution? When I click "MIrror displays" the resolution gets messed up. I want to use my monitor for the main use and close the lid of the laptop.
I have created a virtual machine of a system running Fedora Core 4 and I need to upgrade it to Fedora Core 10. Based on what I have read, it iis possible so I started theupgrade process. I get an error message saying that /dev/hda6 (my root paritition does not exist) even though it does.
Does the installer need to read a label from /etc/fstab? I executed tune2fs -L / /dev/hda6 amd ,and added LABEL=/ for the corresponding entry for fstab. but the FEDORA CORE 10 is still giving the same problems for the installation process. Should I upgrade to an intermediate verson like Fedora Core 7 first?
I will be relocating to a permanent residence sometime in the next year or two. I've recently begun thinking about the best way to implement a home-based network. It occurred to me that the most elegant solution might be the use of VM technology to eliminate as much hardware and wiring as possible.My thinking is this: Install a multi-core system and configure it to run several VMs, one each for a firewall, a caching proxy server, a mail server, a web server. Additionally, I would like to run 2-4 VMs as remote (RDP)workstations, using diskless workstations to boot the VMs over powerline ethernet.The latest powerline technology (available later this year) will allow multiple devices on a residential circuit operating at near gigabit speed, just like legacy wired networks.
In theory, the above would allow me to consolidate everything but the disklessworkstations on a single server and eliminate all wired (and wireless) connections except the broadband connection to the Internet and the cabling to the nearest power outlets. It appears technically possible, but I'm not sure about the various virtual connections among VMs. In theory, each VM should be able to communicate with the other as if it was on the same network via the server data bus, but what about setting up firewall zones? Any internal I/O bandwidth bottlenecks? Any other potential "gotchas", caveats, issues? (Other than the obvious requirement of having enough CPU and RAM).Any thoughts or observations welcome, especially if they are from real world experience in a VM environment. BTW--in case you're wondering why I'm posting here, it's because I run Debian on all my workstations/servers (running VirtualBox as a VM for Windows XP on one workstation).
