General :: What Is High Performance Computing And Its Uses
Jun 8, 2011what is High Performance computing and its uses.
what is active active and passive passive cluster ?
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CentOS 5 :: Performance - High Context Switches - When We Run The App, Get This Up To The 500,000 CSs Per Second?
Dec 18, 2009I have a user complaining about performance:-
Quote: At times on our server, during more-or-less idle moments, context switching is around the 2000-3000 mark.When we run the app, we can get this up to the 500,000 CSs per second. Not only this, but at the same time, the CPUs go to >60% system (the kernel is having to do all that context switching after all), leaving only around 30% for user space. We think it is a possibility that the massive context switching is contributing significantly to our performance issues.
The server is a HP DL580 G5 with 4 x Intel Xeon E7340 @ 2.4Ghz.My issue is that I don't know if the contect switching is a problem or not.From what i've read those values are not necesserilly cause for concern.
Server :: Nagios Performance - High Load Average
Jul 6, 2010I have a Nagios server with a lot of hosts and services; around 400 services (in all) and 150 hosts. Most of these services are programmed in bash language. The problem is the server has a high load average; between 5 and 11. The server has the next features:
- Intel Xeon 2.66GHz Dual Core
- 4MB cache memory
- 1GB RAM memory
- 50GB hard disk
Is this load average normal? Should I program the plugins with C?
General :: Where To Find The Rpms For OpenMP For SciLinux 5.5 For64bit Computing
May 3, 2011Where can I find the rpms for OpenMP for SciLinux 5.5 for64bit computing?
View 3 Replies View RelatedUbuntu :: Ondemand Vs Performance - Increases The Clock Speed To Performance When The CPU Is Under Load
Jul 31, 2010I 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.
View 7 Replies View RelatedFedora :: How To Cluster Computing
Aug 2, 2009I am bit curious about Cluster Computing. I don't know much about it.Here is Some thing which I wanted to know.1) How can I configure fedora for Cluster computing .2) Is it possible to connect computer of different configuration(like AMD + Intel )? and also for different architecture ( like i386 + x86_64 ) for cluster computing.
View 7 Replies View RelatedOpenSUSE :: Ability To Do Cloud Computing?
Dec 5, 2010I was wondering, being a former Ubuntu user I was able to do cloud computing using Ubuntu One. Is there anything similar in OpenSUSE?
View 9 Replies View RelatedUbuntu :: Show The All Computing Activities On 11.04?
May 4, 2011how to show all program running (( computing activities )) on ubuntu 11.04 , like mac or this picture [URL]
View 5 Replies View RelatedDebian :: Dual Boot - Parallel Computing
Oct 11, 2015I was asked to research if it is possible to install a Debian distribution of Linux to HP Z420 Workstations as second OS (dual boot) in our lab. The lab is normally used for Computer Aided Design (Windows 7). The plan is to have parallel computing possible with these workstations on Linux side.
The link for HP Z420 Specs suggests amd64 distrubition should be supported. Tell me If I'm wrong as I have always been interested in software side of things.
Looking for info regarding installation of Debian to HP Z420 workstations as well as using these computers for parallel computing with Debian.
Ubuntu :: Distributed Computing: More Cycles Or More Cores?
Sep 1, 2011I'm planning on setting up a new Linux box expressly for distributed computing (BOINC, SETI@home, etc.). All things being equal, what's better- More clock cycles or more cores?
View 4 Replies View RelatedProgramming :: Conduct Parallel Computing On CUDA?
Jul 29, 2011I came across some problems. I need to conduct parallel computing on CUDA. I input "uname -a"and read these: "Linux BXSJC 2.6.38.8-35.fc15.i686 #1 SMP Wed Jul 6 14:46:26 UTC 2011 i686 i686 i386 GNU/Linux". I use CUDAtoolkit 4.0. when I input: cd /home/bxsjc NVIDIA_GPU_Computing_SDK/C and "make -i ",the computer returns
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Fedora Servers :: Setting Up A Cluster For Scientific Computing?
Mar 2, 2010I want to set up a cluster for scientific computing (mainly statistical stuff with R). I have a few conceptual questions. First, is there a difference between a Beowulf cluster and a cluster that has single-system image ("SSI," e.g. using openSSI or LinuxPMI)? If so, what's the difference? Second, if there is a difference between Beowulf and SSI, which one is better for scientific computing? Third, does using Eucalyptus make sense for scientific computing or is this more suitable for IO-oriented operations such as web service or databases
View 2 Replies View RelatedUbuntu :: GPU Computing For Neutron/muon Beam Experiments?
Jan 25, 2010Wanting to evolve current cluster to GPU-enabled and retain ubuntu (champion the cause!) Details below; ill share all results/successes here on the forum for any interested. How best to get started ? Heterogeneous cluster of 40 quads/dual-quads w/4,8,16Gb memory All running ubuntu 8.04 or 9.04 Quantum Mechanical computations supporting neutron and muon beam experiments on red-wine/green-tea anti-oxidants, etc... Success of this centure would be precision independent (for now) single-precision floats are fine for now. I am more concerned with getting it going and making compatible with current codes - less concerned with accuracy of results for now. Double prcision floats will come anyways with the Fermis.
View 5 Replies View RelatedServer :: Platform For Cloud Computing In Open Source?
Nov 9, 2010I have a plan to deploy a private or public cloud computing. And I've been considering Eucalyptus, OpenNebula, Nimbus, vSphere, abiCloud and Joyent.
I'm very interested in Eucalyptus and OpenNebula, since they are both open source, they have many features, they both support Amazon EC2 and Amazon APIs and they seem to be able to work with different hypervisors, such as KVM, Xen, VMWare ESXi, etc.
Eucalyptus seem to be very supported by Canonical, because it can work with Centos Server, so I bet it will grow more and more, and we have a good experience with Linux and in particular redhat.
On the other hand, many people told me that right now OpenNebula is better. So the question is:
- which one between Eucalyptus and OpenNebula? The other three choices? vSphere is probably free (if we use ESXi and not ESX) but it's not open... abiCloud seems to be similar to Eucalyptus and OpenNebula... about Joyent, many people say very good things, but I want to know more, and then, is it open source? I mean here, can I use it as free ?
After having built the private cloud, we probably want to also use an external service and create an hybrid cloud. If for private cloud we chose OpenNebula,Eucalyptus, abiCloud or Nimbus I guess the best thing is to use Amazon EC2.
- Is it also possible to use VMWare solution?
- And if we chose abiCloud or Joyent, what can we use to create an hybrid cloud?
About Microsoft Azure and Google App Engine, it seems to me they have many limitations and I prevent it because it could be have a highly cost, so I'm not considering them.
Fedora Security :: Can't Forward My Kerberos Credentials To A Computing Resource
Aug 23, 2011I can't forward my kerberos credentials to a computing resource before connecting to the resource for which I have kerberos credentials. In other words, from my machine at work I obtain my ticket with kinit -f to a computing facility off in some lab somewhere.
Then, I want to ssh to another machine in another department (I don't have control over the krb5.conf file or this would have been easy) where I work. It is on this machine I want to be able to ssh,scp, etc to this far off lab. I've tried several options around this barrier, but I'm a total failure thus far. I checked that GSSAPIAuthentication is set to yes.
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Ubuntu Installation :: Motion Computing M1300 - Screen Rotation
May 27, 2011I just installed ubuntu 10.04.02 on to my tablet, aside from the dreaded intel video problem. Install went ok, but I'm finding now. That when I rotate the screen, the touch screen isn't adjusting to match. I'm not really ubuntu savvy.
View 6 Replies View RelatedProgramming :: Pthread - Optimize Computing Function / Loop With Threads?
Sep 4, 2010I have to compute prime numbers with threads in C. So I choose the algorithm "Sieve of Eratosthenes" and I tried to create 2 threads, but I don't know how to optimize my computing function with threads I beg for help. This is my function:
[Code]...
but it seems like the both of the threads are calculating the same function twice? Is it possible to be optimized or not?
General :: %CPU Too High For Process?
Mar 4, 2011I am using centos 5, Kernel 2.6.18-53.el5. I am using 2 quad core processor with 4gb of ram
I am trying to figure out the significance of %CPU in the ps command.
My astreisk process %CPU is very high at the moment, at 115. I want to know if it is a cause for concern? If I do a top then the load of the box is very low.
Code:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 2872 115 1.4 628664 58372 ? Sl 14:56 190:30 /usr/sbin/asterisk -f -vvvg -c
General :: 64 Bit - Performance Hit Using 32 Bit On A 64 Bit CPU?
Jun 25, 2010I'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.
View 5 Replies View RelatedGeneral :: Load Average Too High
Aug 10, 2011I wrote a script to extract and get the the name of *.gz in a foler . Since running that script every 10 minutes, load average on my server increases more than 10.I checked with 'top' and it showed many D process.
View 2 Replies View RelatedGeneral :: Sound Lacking High And Low End
Jul 1, 2010Is this just a standard characteristic of Linux or is there some way I can EQ all the audio? I've had nothing but problems with audio sounding like a scratched record in Linux. It would skip, crackle and break up no matter the source or volume. Found a solution that one to simply remove PulseAudio.
I'm using Altec Lansing ADA885 speakers with 8" DVC subwoofer. System response is good down to ~28Hz but it sounds like a cheap boombox. Last time I had these hooked up to a Windows (XP Pro) system, the bass was deep and full. Very audible all the way down. Now it sounds like the audio is boosted at center frequencies and overly cut on high and low end.I even tried putting in a PCI Turtle Beach Santa Cruz 5.1 card and the sound did NOT improve.
General :: High Memory Utilization By System?
Nov 11, 2009I have a server running samba process and there are about 70 samba users connected at a time. The system has 4Gb of memory and it seems each samba process is utilizing only 3352Kb of memory.
When I run the command
pmap -d (pid of samba)
It gives as:
b7ffa000 4 rw-s- 0000000000000000 0fd:00003 messages.tdb
bfe46000 1768 rw--- 00000000bfe46000 000:00000 [ stack ]
ffffe000 4 r-x-- 0000000000000000 000:00000 [ anon ]
mapped: 33384K writeable/private: 3352K shared: 20504K
But when I run the top command, it results as below:
Tasks: 163 total, 1 running, 162 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.9% us, 4.9% sy, 0.0% ni, 93.3% id, 0.8% wa, 0.2% hi, 0.0% si
Mem: 3895444k total, 3163192k used, 732252k free, 352344k buffers
Swap: 2097144k total, 208k used, 2096936k free, 2487636k cached
Why could the system be utilizing such high memory? By the way, the server is not running other processes. The samba version running in it is 3.0.33-0.17.
General :: Volume From Speakers Still Very Low / Make It High?
Jan 4, 2009I just built my first computer from the ground up and installed linux x86_64, FC10, and among other problems, i cannot get the volume of my speakers to play much above a low volume. i have the pulseaudio volume control set to 100% for the output and input levels. i adjust all my video and audio players volumes to the max also, but the volume from the speakers is still very low. the speakers worked fine with my old hp computer. is there anything i can do, adjust to fix this?
View 4 Replies View RelatedGeneral :: High Load During Firefox Downloads
Nov 14, 2010During downloads, the top command shows the Firefox process at 100% CPU. Yesterday I tried to download an .iso image. After a few hours the Firefox window would not refresh nor would it respond to input. I tried the wget command. It used negligible CPU time and completed in 28 minutes.
This problem is easy to reproduce because it happens every time I download a file in Firefox. It also happens when I use a fresh profile to run Firefox without any extensions or plugins.
This is Firefox 3.6.12 on Fedora 14.
General :: High CPU Use - Daily Server Down On Same Time
Sep 2, 2010I am working on Ubuntu 8.04.3 OS, with this I am getting a problem, Daily my server is down on same time at 4:00 PM. I seems server is down by "kswapd0" process, I am not sure, As I run top command, I got below out put
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General :: High Load Average Investigation
Feb 10, 2010I have High load on my server and my investigation shows nothing (so i believe that my investigations is wrong ), the load average in this moment is 10.13, 9.47, 8.24. , mentioning the below.
- The disk utilization (all the disks) is near 0, as the result of the IOSTAT
- There is no blocked processes (as a result of VMSTAT).
- I have two processors (dual core) , the maximum load average should be something around 4.
- The server always have above 8 load average in all times interval.
btw , my OS is RHEL AS release 4 (Nahant Update 7)Kernel :Linux 2.6.9-78.ELhugemem #1 SMP i686 i686 i386 GNU/Linux
General :: High Ping Time On Ubuntu 10.10?
Mar 2, 2011ubuntu 10.10 with broadcom wireless adapter when i make ping on google i got: time=2000 ms i tested on another computer i got 350 what the problem?
View 2 Replies View RelatedGeneral :: How To Measure Synchronization Performance
Jul 9, 2010I'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.
General :: Efi And Bootloaders And Any Performance Advantage?
Apr 24, 2011Modern 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?
View 1 Replies View RelatedGeneral :: Best OS To Install Nessus On For Performance?
Aug 26, 2011I 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?
