What is the best way to determine in Linux if a multi-processor machine is overloaded? I thought load was a good measure but I run a large number of tasks which don't consume a lot of CPU but which drive up the load. A 4 processor machine has a load of 66 right now according to top for example but mpstat reports that the all CPU idle time is 89%.
View 1 RepliesI have a multi-threaded app using pThreads that runs great under Windows on my 4 core machine - all four cores get maxed out processing parts of a large file. I recompiled the same code to run on Red Hat linux on a 64 CPU machine - but from I can tell when it runs - it gets stuck on one core. "mpstat -P ALL" shows the cores are barely loaded. I have tried sched_affinity, sched_priority and SCHED_FIFO - nothing has helped. Any ideas on getting more performance?
View 14 Replies View RelatedI 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.
View 2 Replies View RelatedIn my environment all the servers are having more than 5+ cpu's.Please help me to find out from which CPU the OS is booting
View 5 Replies View RelatedI 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?
Code:
#!/bin/perl
use strict;
[code]...
I have 4 OSes installed:
Windows XP on sda1
Backtrack on sda5-6
Ubuntu 11.04 on sda7-8
Ubuntu 10.10 on sda9-10
I want to remove Ubuntu 11.04 (partitions sda7-8). I tried using GParted from Ubuntu 10.10, but it says that I have to unmount logical partitions with a number higher than the one being removed.
I'm just an undergrad with duck tape and google searches to hold this place together. Anyways on to my question. Where I work, we have a tape library but no way to configure it, the backup software simply talks to the robot to load and unload tapes. There is a network port on the library and I do have the software, but have been running into problems getting access. I was wondering, is there a way to determine the ip address of this machine by plugging in a cross over cable with a laptop and scanning it? What tools could I use to do this?
View 5 Replies View RelatedI have Ubuntu 10.10 Server installed on a 32 core machine(quad AMD Magny Cours 6128 ), and I was wondering what kernel configuration would optimize its performance?So far, I have only found the obvious configurations that are checked off:
1) Processor type and features ---> Support for big SMP systems with more than 8 CPUs
2) Processor type and features ---> Maximum num of CPUs
3) Multi-core scheduler support
Is there anything else I should consider?I plan on running multi-threaded programs with moderate amount of inter-processor communication, shouldn't there be some options related to the shared memory?
I have been looking at things with the uname command and was wondering if you can install a system with 64/32 bit when it was actually not the one you installed (e.g. you install a 64 bit OS on a 32 bit comp). I was basically wondering how to tell what type of hardware I actually have instead of what the Debian package installed. (In order to ensure that I am running the hardware the way it was designed.) At the moment, I am looking at my processor (uname -p returns "unknown") and the machine build (uname -m returns i686).
View 3 Replies View RelatedI been havin a problem whit the installation of fedora 12 on virtual pc, gives me the error:
"An unrecoverable processor error has been encountered.The virtual machine will reset now."
How do I do this at my modem page?
View 4 Replies View RelatedAnybody know how to do this, IN MY MODEM PAGE?This is the best I can copy my modem config page code...
View 2 Replies View Relatedi have installed ubuntu in my laptop.since i have AMD processor fedora doesnt support AMD processor..the recent version fedora 12 supprots AMD processor.i am doing my final project in ns2 hence it should support tht too!!! Which is the best choice to override ubuntu grub fedora 12 or redhat linux.
View 3 Replies View RelatedMy mom's Ubuntu machine has been rather strange the last day or so. It takes a while to turn on, delaying apparently at loading "powernowd".
GDM seems to load fine, but then logging in to Gnome takes a long time. The panels ususally crash, as well as the desktop, but eventually everything loads again.
Most programs take a long time to load; also, "sudo" takes a long time to request a password, but after that the "sudoed" command runs normally.
Gksudo never seems to show up, so I can only access programs like "Software Sources" via terminal (e.g. sudo program).
Strangely, Gnome System Monitor says the processor and memory are not completly full.
Does anyone know what this is? Are there any commands I can run to diagnose it?
im running vps with debian lenny, with apache2 webserver, memcached, postgres and django-framework using mod-wsgi. Some of the pages served by django take long to generate (aprox 15 s), but there is also the memcached, compensating this.
My problem is that, when a robot visits the site, it starts traversing the site visiting all the pages and also the nongenerated, thus slowing it down to point where it is not responding.
What Im looking for is a solution to identify that the request comes from a robot (user-agent, ips, etc) and limit the resources, so that f.e. only one thread serves the robot etc...
gauge when the server is getting overloaded with users. At present I run the server mainly as a proxy server with about 100 users. The bandwidth at the data centre is 100Mbps connection with total bandwidth used last month = 17431.16 MB I would like to add a VPN in future but feel that this might overload the bandwidth as instead of it just being web traffic it will the entire client TCP connections. I would like to monitor this before it gets to the stage where users are complaining but not sure how to gauge whether the proxy is being overloaded. It is used mainly for video traffic.
View 11 Replies View RelatedI've got this problem for a few weeks and I cannot figure out. I'm pulling my hair out. I have a server installed PHP, lighttpd and redis. Sometimes, I got the following messages in the error log of lighty: Code: 2010-09-24 13:57:33: (mod_fastcgi.c.3011) backend is overloaded; we'll disable it for 1 seconds and send the request to anoth er backend instead: reconnects: 0 load: 567 2010-09-24 13:57:33: (mod_fastcgi.c.3011) backend is overloaded; we'll disable it for 1 seconds and send the request to anoth
er backend instead: reconnects: 0 load: 626 and:
[Code]..
I got the error: "An unrecoverable processor error has been encountered. The virtual machine will reset now." I have edited the options in installation screen with adding noreplace-paravirt at the end of boot parameters. but still have this error and FC installation does not continue.
View 11 Replies View RelatedI have an ATI Radeon HD 3300 on-board video chipset, and an ATI Radeon HD 4350 PCI card. What I want is to have both displays available from one mouse/keyboard. I want to play media on one and have the other as my main desktop.The problem is that with Xinerama enabled, KDE desktop effects do not work (KDE says XComposite and XDamage are not available, even though I explicitly enabled them as extensions in the xorg.conf file), and performance is quite bad. Without Xinerama enabled, performance is great, desktop effects work great, but there's a lot of trouble with full-screen video, and the KWin window manager does not apply in the second display (although I can run a second instance of KWin on :0.1).
View 2 Replies View RelatedAnyone successfully using VNC client on a Mac to control a Debian server?I have the vncserver setup on the Debian machine properly. But I'm having problems connecting to it from both a PowerMac running Tiger and a MacBookPro running leopard.I can connect no problem from a machine running Slack12.2, have not setup port forwarding on my router to connect remotely yet.My Debian machine is running the latest stable release of squeeze with KDE4.I originally tried this with RealVNC Enterprise for OSX but I'm not gonna buy it so I need another alternative after the 30 day trial ends as they have no free version for OSX.
The situation is that I do freelance graphic design on the PowerMac with Cinema4D and Photoshop so I spend most of my time on that machine which is located in my home studio in my attic. Aside from the MacBook and a Dell desktop(family machine)all my other machines and network hardware are in the basement. So to go from the attic to the basement everytime I need to do something on another machine is not practical, and the only other machine I need to access on a regular basis is the Debian box in the basement, this makes the most sense.
I also have a 14 year old living in the house and he's fascinated by all this and will meddle in anything he gets the chance to so all the Linux machines and network hardware need to be behind lock and key.
Now that Ubuntu 10.04 has multi-touch capabilities built-in, if I do not have a multi-touch screen or surface device, can I get 2 USB mice and get 2 pointers on the screen? One for the right hand and one for the left hand as I am ambidextrous, and would find it very convenient to have 2 mice.
View 4 Replies View RelatedIm 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]........
Is it possible to convert/recompile an already compiled x86 binary into an ARM binary?I'm using a BeagleBoard with a command-line Ubuntu (Maverick) and want to run a Ventrilo server but the x86 executable they supply cannot be run on the hardware as far as I can tell (most likely due to differing architecture).Unfortunately I don't have access to the source to allow me to recompile it natively.
View 3 Replies View RelatedI am going to order the parts and build a new PC soon. One goal I have on my new machine will be to use Windows as little as possible and use Linux. In Linux I will need to use an emulator/virtual machine of some sort for things like playing World of Warcraft or City of Heroes and running Photoshop. (No, Gimp is not just as good for my needs). I plan to have 4Gb, to start, of ram and my question comes to one of processor selection. I assume that running a Windows app in Linux would be one of the most system taxing things I could do. Would I be better served by more processor cores or a higher clock speed for these tasks? I will undoubtedly have an AMD proc. I have been considering the following.
Athlon II X3 440 3.0 Ghz.
Phenom II X3 720 Black Edition 2.8 Ghz
Phenom II X2 555 Black Edition 3.2 Ghz
Athlon II X4 630 2.8 Ghz
AMD Phenom II X2 545 3.0 Ghz
I am leaning towards the X3 440 (or 435) for the sake of cost so that I can squeeze a discreet video card into my budget but that it outside the scope of my question. Extra info just in case The Black Editions are very over-clockable with unlocked CPU multipliers. The Phenom II CPUs have 6Mb of L3 cache and the Phenom II CPUs do not. The question boils down to how well Linux and Wine are multi-threaded to make use of all available cores and what impact, if any, L3 cache has in a Linux environment.
I was wondering if I would be if i able to use x86 linux distros with my 64 bit processor, or do I have to use the 64 bit version?
View 4 Replies View RelatedJust wondering if there is a way to determine if the user has logged in is via ssh or if they are sitting directly in front of the PC and have logged in that way.I was going to do it via the .bash_profile so once they have logged in the bash_profile is run and it will have a test to see if the user is logged in via ssh or 'direct' log in. but not sure how or if this can be done.
View 2 Replies View RelatedI have cloned my linux OS onto a new hdd. Now even tho the system will boot, it directs me to the login screen and asks me to fix the location of the root dir because it is looking for /dev/disk/by-id with a very long serial #. I presume this is the old hdd serial #. How can I determine the serial # of the new hdd and change it in fstab? Is this the correct idea? Is it just......ls /dev/disk/by-id???
View 2 Replies View RelatedHow do you transfer files on a Linux machine with ftp,sftp and scp disabled onto a remote machine
View 2 Replies View RelatedI successfully installed the virtual box on my fedora 8 system, and also created a virtual machine with windows xp OS, it works nicely, I try to configure the serial port of my virtual machine and try to configure the path for the port "screen shot are attached" it gives me the error message also the "screen shot are attached" for your review.Is kind of mistake is going on during the path setting, and how to set the path for configuring the serial port of my virtual machine so that I can use the hyper terminal tool of windows.
View 4 Replies View RelatedI have an old mini-desktop computer I want to have as a spare machine for internet browsing and checking email. It has a copy of XP currently, but the previous owner didn't put the key in so I can't get onto it at all. I plan on putting linux on it, just not sure what it can handle. It has 384 megs of RAM I believe, and the processor is a via C3, so I'm not even sure if I can run linux on it. I've checked the faqs and googled a bit, but I can't tell if it's i486, i586, or one of those things, and I'm not sure what linux distros(if any) are compatible. Will linux mint be able to run on a 900mhz processor of this sort and 384 megs of RAM? I'm thinking no, but it's the only linux distro I've dabbled with before. If not, will ubuntu? Will opensuse?
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