General :: Find What Task Is Running On A Particular Cpu Core?
Sep 17, 2010
I am using Kernel 22.214.171.124 on an Intel Core2Duo based system.
1) I have to find on which core a particular task is running on .
2) I have to just log whenever my task is scheduled on any of the cores with the cpu core number & timestamp info. I am ready to modify the kernel to do printk or some logging . I guess there used to be 2 fields called 'processor' and 'last_processor' in task_struct in older kernels which probably had this information .
So what do I do to find out on which core a particular task is running on ?
Are there any utilities that are simple-to-use and can display the tasks that are running on each of the cores , including the cpu core info ? top , mpstat etc do not tell you on which cpu core a task is running on .
Assume someone bind a particular process to a particular CPU core(In multi core machine) by using sched_setaffinity() like functions. Then how we can get that process running core id and CPU core utilisation of that process on that running CPU core(Pragmatically or by a Linux command)?.
I have two custom tasks running daily. How do you give priority to one over the other?One of them is configured via the logrotate.conf. The other sits directly in cron.daily.I'd like the one in cron.daily to run after the script that is in logrotate.Please can you advise how to do this...
using mint 10, now after updates my system is barely working. The programs were no longer showing in the task bar, and the system was running much slower.
This repeated over and over again. My temperature was never to high 40-55, and I found a suggestion to update my kernel to 2.6.37-020637. After doing so there is no longer the thermal limit exceeded error but the computer is still running poorly. The system is slow and again no programs are showing up in the task bar when open.
How do you launch a task from a terminal command line interface and it not be kill'ed if you close the terminal window. Like if I run jedit I type jedit & which launches jedit as a backgorund task. But, if I close terminal window, jedit dies to. How do I laucnch jedit and completely divorce it from the terminal task?
There is a computer with two "Xeon(R) CPU X5550 @ 2.67GHz" CPU. The Hyper-threading is enabled, so it looks like 16-core system, but really there is only 8 physical cores.
I know that when hyperthreading is enabled, each physical core is splitted into two virtual cores. I want to know, which pair of virtual cores shares a physical core and which are not. Or, how (in what order) will Linux enumerate HT-cores comparing to real cores. (enumerating is done for sched_setaffinity and taskset masks).
I have a dump of /proc/cpuinfo file from the system.
I think there are possible:
CPU0-CPU7 are not sharing phys. core. CPU8-CPU15 too. But sharing is in pairs CPU0+CPU8, CPU(i)+CPU(i+8) and so on. or CPU0+CPU1 are from single physical, CPU2+CPU3, CPU(2*i)+CPU(2*i+1). or exotic CPU0+CPU15 sharing, CPU1+CPU14 ... or random?
The hard moment in this case is that there are 2 physical dies of CPU (two sockets), and usual recommendation of using "physical id:" field can't help
processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz
I have my task list in evolution (mainly so it can sync with my phone and online task list) but I always forget to look at the task list. Is there an application or plugin which periodically displays the contents of the tasklist or even better, it briefly displays the most urgent/important tasks when I login? Or anything else which automatically displays the most important tasks. Currently I have to open the task list and look at them (which I usually forget). I do not mean some kind of alarm when the task is due but more a daily reminder of what to do.
I recently read in a forum that by default the Linux kernel only activates one of two cores in a dual core processor. Searching online gave one option to find out and that was the mpstat command. I therefore ran the command and got the following output.As the result says, it shows only 1 cpu. I was wondering what I could do to activate both cores in my machine, and whether doing so was going to cause me any problems.
I have just installed Ubuntu 10.04 on a new Dell. I have an Intel Core 2 Quad processor and I have noticed that one of the cores, sometimes 2, is almost always running at 100%. It is not always the same core and it switches between cores if I use the computer for a while.I searched the forums and came up with some similar problems and tried typing in the command "top" into terminal, but as a relatively new user I don't know what to do with that information.The only one that jumps out at me is that Root says it is using 100% CPU, which I didn't notice on other peoples posts.Also, is it bad for my computer if one of the cores runs so high?
I've a program that launches new processes, and wait for them to die before it exits. So, for example, my program is a process, and it launches 3 more processes, and when the 3 child processes end, it will exit.
As you see, at end of the example, the program used a total number of 4 processes.
1 - Now, I'm running this program in a CPU with 4 cores. This means that the program used each core for each process?
Anybody knows how to fix overlapping tasks in KDE system taskbar?Here System Monitor overlaps with digiKamWorkaround to rearrange icons - start any new task.Sorry for taking real photo of the screen. When I do PrintScreen KSnapShot task appears in the list and makes all task to rearrange. The resulting screenshot contains already fixed view.
I am running Debian Squeeze 32bit with gnome-core installed. When I alter the acceleration or sensitivity within the pointer speed section of gnome-mouse-properties, my mouse does not act differently. Has anyone else encountered this problem? How can I change my mouse sensitivity? I have installed Debian Lenny previously and I recall that I was capable of changing the sensitivity.
After upgrading from 10.10 to 11.04 all of a sudden, the task manager or task bar, keeps changing length. The individual window "buttons" themselves keep changing size - flashing even, and the space between them also changes. It is driving me nuts! The little system tray(?) icons no longer appear in the system tray, but all stacked on top of each other in the top left corner.
Possible Duplicate: Finding the process that is using a certain port in Linux I'm using Ubuntu Linux 11.04. How do I write a shell script expression that will find the process running on port 4444 and then kill the process?
I am currently struggling with one of my tasks.I was asked to find a way how to determine how much time an _already running_ process is spending in user and kernel space.E.G. <some tool> <pid>[Control] + [c]<pid> spent 12.1 seconds in user and 1.52 seconds in kernel space.Does something like this exist? Basically I guess I am looking for something similar to time, except that the process is already running.So..a) Is there a tool which fulfills this task?b) Is there a way to write your own software which does the job? Is it even possible to code something I am looking for?I recently found strace -c -p <pid>, but well, this is not exactly what I was looking for.
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 126.96.36.199-1.2-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