I have been searching for the multicore scheduler support for ARM, in linux kernel.
CONFIG_SCHED_MC, CONFIG_SMP are there for x86..what about ARM ? will the same configs do the job...
I have recently loaded the new LTS SERVER 10.04 release and it loaded without errors. My only issue is that it does not seem to correctly identify the Dual Cores for each processor. (The HP xw9300 I have has two hardware CPUs - each one being Dual-Core - so there should be a total of 4 CPUs recognized - unless I am mistaken?) How I can debug the processor recognition for multi-core support to get the additional cores recognized.
My /proc/cpuinfo file looks like this:
Code:
xxxx@hostname:~$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 37
model name : AMD Opteron(tm) Processor 248
stepping : 1
cpu MHz : 2194.452
cache size : 1024 KB .....
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp
good download manager for ubuntu with scheduling support .I tried wxdownloadfast , fatrat, roxbird, multiget . The roxbird didn't start at all . In other three, downloading works but scheduling simply doesn't work . Nothing happens at the scheduled time.I prefer a graphical one because I can suggest it to my friends using ubuntu . If you know a working (I mean scheduling) command line one, please tell that too am using 64bit ubuntu lucid . I don't know whether that is the reason why scheduling didn't work
View 2 Replies View RelatedIs there a live booter iso of Fedora 14 for i386 architecture?
View 3 Replies View RelatedI need a textbrowser with Javascript Support. I have compiled the elinks stable 0.11x and the unstable 0.12x version mit JavaScript Support (js moz dev). Both browsers can be started and showed websites normaly. But no javascript, even simple tests like [URL] failed. I started elink with ./elink and typed then the url.
View 4 Replies View RelatedFound about this website in vector linux site,you can check before you buy if the wireless adapter works with linux or not, so I think is a good tool to check wireless adapters by manufacturer, interface or chipset, it even have links to the drivers websites,
[URL]
What i meant was, in a multicore system with 'n' number of cpu's, will each cpu have its own linux kernel installed, or will all cpu's have a copy of the same kernel image? Another question regarding multicore is kernel tracing. Since tracing works at the kernel level, then should i perform tracing for each cpu's seperately or kernel tracing can be performed as a whole for all cpu's put-together?
View 3 Replies View RelatedI am experiencing a multicpre problem with fedora14 / kernel 2.6.35.6-45.fc14.x86_64 #1 SMP. (standard from the distro). The host has a total of 2 cores .yet a virtual machine started with 'smp 2' ( or xml : <vcpu>2</vcpu>) will not run on 2 pyhs cores . it will use just 1 core ('top' at the host shows 100%cpu while running an endless loop process on the VM) and libvirt 'virsh vcpuinfo <vm name>' shows only 1 physical cpu used (although 2 vcpus are used : 0, 1) The kernel seems to be an SMP one ( so says the uname -a . what does '#1 SMP' mean ?) . Am I missing something ? same XML on a DEBIAN machine will run the VM with 2 phys cores as should although the host there has 4 cores (>2)Should I recompile the kernel src with some addtional flag ?
View 7 Replies View RelatedI wish to know that which gcc release version had support on ARM 9 multicore system by using pthread library for its parallelizing method on ecos rtos.I assume that the compiler that support the single ARM 9 processor will surely compile its multicore version also.But i need a clarification about it.It is good if you give a article or provide a suitable link on the ARM multicore programming and its compilation method
View 1 Replies View RelatedI've got an intel i7 920 CPU. It has 4 cores, but thanks to hyper threading technology each core could run 2 threads so in /proc/cpuinfo it shows "8 processors".
1. what would be the optimal -j flag when compiling programs on my CPU. I've come across -j7. Why 7?
2. Where and what would I put this flag to make it permanent (eg. .bashrc?)?
I'm wondering if anyone is having a similar issue to what I'm experiencing. openSuSE 11.2 was very fast on my system. Since installing openSuSE 11.3, I've been experiencing many short term hangs where I'll lose control of the mouse for a few seconds (usually about 2-5) and the system will do nothing. I don't have unusual load during these time periods and I don't really see any spikes during these periods. If I leave a cpu monitor active, I can see a very very light spike one core0 when it happens, but the mouse and keyboard (and seemingly the whole desktop) hang during this spike so I can't see what's causing it, if that's really the culprit.
I am almost suspecting that I'm experiencing an issue with interrupts... since it seems that everything is hanging for a few seconds, then coming back to life. It does seem to happen more often when I'm resizing or minimizing windows... but that's about all I can say as it also seems pretty random.Here's some basic info on my hardware:ASUS M3A78 Pro motherboardAMD Phenom(tm) 9950 Quad-Core ProcessorGeForce GTX 260G15 Keyboard and MX revolution mouse (just in case USB interrupts turn out to be the issue)So, is anyone else experiencing a similar issue? Maybe we can narrow down what we have in common. Oh, I'm running x86_64.
I updated this on jul 21 using comments below Torque is a batch job queuing system that is used on clusters. But I find it handy to use it on my multi-core workstation as well. It allows jobs that need to be run to be schedule by multiple users. The scheduler will make sure that not too many jobs are run simultaneously which could cause high system loads or memory issues. I previously posted how to install torque on ubuntu hardy from the torque source package. However, torque is now in the repositories of lucid and here are the steps that I had to take to get it to work on my workstation.
For this setup I kept the server host name 'torqueserver' which is the default in the package. You can do the same or use a fully qualified domain name. In that case, you will have to adept the steps somewhat. My workstation has 8 cores, and I only want to give 6 of them to the que. Please adapt your numbers accordingly.
0) open root terminal
Code:
sudo -s
1) add torqueserver as an alias to /etc/hosts.
Code:
gedit /etc/hosts
change 127.0.1.1myHostName to 127.0.1.1myHostName torqueserver*) see post by drlemon.
Alternatively use a resolvable host name (check with 'host $HOSTNAME') in the file:
/var/lib/torque/server_name and whereever torqueserver is used below, use that host name
2) install torque from repositories
Code:
apt-get install torque*
[code]....
This works for me but probably requires more configuration in a demanding computing environment. Check out the torque website for more queue configurations, user management etc.
I have a cron job to schedule the task on the third sunday of the month.I saw the previous threads but didn't find any solution.
How the cron syntax can be written.
We are seeing some strange behavior on a Set top Box with the scheduling of tasks. We use 2.6.12 kernel. The issue is when we create a Task, say task1 with a priority of 46.But,this task is not Scheduled to run by the scheduler right away. It gets chance to run only after sometime. What we see here is that I create many other tasks with lower priority than task1,but they are immediately scheduled. Ideally, the task1 should have got scheduled before certain other low priority tasks as it has higher priority. Any patch is available wrt this?
View 3 Replies View Relatedkindly give me example of earliest deadline first scheduling?
View 5 Replies View RelatedI want to change linux scheduling algorithm for some of my processes but when I click on processes in ksysguard and click renice project, all of the processes use normal level cpu scheduling. Why is it such a thing and there is no priority?
View 2 Replies View Relatedhow can I use sar in order to get information about the scheduling?
View 1 Replies View Relatedwhat is disk scheduling and how does it work? and how is it done in ubuntu 9.1
View 2 Replies View RelatedI am wondering about scheduling audio playback under Ubuntu. The background is this: My birthday is fast approaching, and I always try to do something to remember the best birthday gift I ever received, that being the Apollo 11 mission; Neil and Buzz landed on my 12th birthday.
Anyway, I have a wagonload of audio from nasa.gov and would like to schedule the MP3s to play in real time. 'at' won't do it, at least with 'mplayer'; I've tried. I suspect that because there is no controlling terminal for jobs run under 'at', the audio has no place to go. Is there some way to get a controlling terminal for these audio playback jobs, or specify a destination to some player?
I can not get 'crontab' to work.Below is the results of 'crontab -e':
Code:
10 * * * * /usr/bin/sigrot
0 18 * * 5 /usr/bin/tff-meeting-mail.sh
[code]....
I was searching for many time but haven't found any solution. Cron would be great, but it allows only steps in range 1-59 minutes. Is there any mode to run something exactly every 73 minutes?
The second i need (the same problem) to run program little more than every 12 hours, it might be in steps of 12 hours and 4 minutes (but 13 hours is much too much).
i think we can simulate preemption by using 2 different priority thread, am i true? I just try these scenario :
1. Create Thread A with priority 99 , SCHED_FIFO..
2. Create Thread B with priority 4 , SCHED_FIFO
Thread A started and doing some busy work.. I guess that Thread B wouldn't start until thread A finished, but I get thread B can run before Thread A finished (It just like a common task switching).. I'm sure my 2 thread has right priority. and if thread B is doing some work and if i yield it to thread A, it should preempt it but this doesnt happen, do someone kno wats happening?
I have a program which is uses sigaction to register for a SIGIO signal (for incoming data on a fd) with an appropriate event handler. I also create a new detached thread 'B' that does some work with the received data. Normally the thread B runs properly. But when my event handler is called (because a there is new incoming data), after the event is handled, the thread B is not called immediately. There is a noticeable delay of the order of many seconds before it is scheduled again .During this delay, my program is doing nothing.
What am i doing wrong? Is there someway i can run thread B as soon as the event is handled (and assuming no other work is to be carried out)?
Can anyone tell me where i can find patch for WFQ scheduling in ns2
View 3 Replies View Relatedi want to do scheduling using /etc/crontab file instead of using crontab -e that is crontab command on the terminal.i am appending to the crontab file in the /etc directory but the scheduling is not happening
View 7 Replies View Relatedis linux kernel is priority preemptive kernel?if it is. where it is using round robin scheduling algorithm?when processes are scheduled for the processor process will be allocated as which sechudling alogorithm?
View 1 Replies View Relatediam try to schedule my job in a file made in /etc/cron.d file as follows* * * * * tomcat6 /home/etika/Desktop/eka.sh /home/etika/Desktop/ea/etika.txt abc@gmail.comwhere eka.sh belongs to etika which is the root and etika.txt belong to tomcat6 this command is not running iam confused about the name of the owner written after the *'s please tell me whose name is written after the *'s(the schedule of the script) the owner of the script or the owner of the file which iam passing as an argument to the shell script
View 2 Replies View RelatedI want to run a program at a precise second on a computer. I know cron can do it but I do not know how accurate it is. Is there a program so you can more precisely run a program at a defined time?
View 14 Replies View RelatedDoes anyone know how to run 2 threads with round robin scheduling. & can we get the time of these threads when they are context switching. That means I want to know at how much time each thread is taking to run
View 3 Replies View RelatedSome of you are probably not going to believe this, but I've been using Linux for like four years and have never used cron for task scheduling before. Now I want to and I'm not sure how to do it. Could somebody link me to some good info? The results of a Google search were kinda confusing.
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