Red Hat / Fedora :: Identify A Process Id On A Cpu Core?

Jun 11, 2010

To see if an application is using all the cores in a system, I wanted to identify which process is running on a core at a given time. Is there any way to get that information?

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General :: How To Identify Raid Degrade Process / How To Rebuilt Process

Jun 12, 2010

send the details raid configuration how to use in linux el5 and how to indentify the raid degrade process and how to rebuilt the process.

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Programming :: Get Process Running CPU Core And The Utilization On That Core?

Apr 27, 2010

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)?.

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General :: Identify Whether Process Is 32 / 64 Bit?

Dec 28, 2010

On my 64 bit Linux box, i have many processes which are 32 bit and some are 64 bit, how to identify which process is 32 bit and which is 64 bit?

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Software :: Identify What Process Are Making Up The WA Statistic?

Dec 23, 2008

I have a WA% between 50-80%.

So I have a few questions.

1. Is that WA% only disk I/O or can it include network IO?
2. How do I identify which processes are making up that WA statistic?
3. Why does iostat report 100% utilization when the drive read/write speeds are under 1MB/s?

The reason I'm asking.

My Oracle stats are saying that the drives are running at about 5MB/s right now, the WA is 55%, and the iostat -m -x is reporting the drives running at 100% utilization with a read/write rate under 1MB/s. The read speed of the drive is 98MB/s (tested with hdparm -tT when I installed the drives)

I know I have a few queries using full tables scans which I'm working on but I'd think that 100% utilization should be running at the full 98MB/s.

I want to try to identify which process (most likely and oracle one) is using the 100% utilization/55% WA.

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Ubuntu Networking :: Can't Identify Process/Unbind Socket Blocking MongoDB

Mar 27, 2011

I'm running Ubuntu 10.10 64bit, and I'm a newbie when it comes to networking.

My issue is that there seems to be a socket bound to a port blocking MongoDB from accessing it's usual port 27017. The strange thing that it was working just fine until recently and I can't figure out what I did to screw things up... I can make it use a different port but the reason why it can't bind to the default port and why I can't fix it is really bothering me. I've tried rebooting the machine even with nothing else running when I try to run Mongo is still blocked giving the following message:

Code:
ropes@ropes:~/mongodb-linux-x86_64-1.8.0/bin$ ./mongod
./mongod --help for help and startup options
Sun Mar 27 14:08:14 [initandlisten] MongoDB starting : pid=2718 port=27017 dbpath=/data/db/ 64-bit

[Code]....

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General :: How To Run The Process On Multiple Core

Oct 26, 2009

How can we run the linux process like tar on multiple core? For example if we want to build the kernel we can use -j4 to distribute process of 4 different core. Is it possible to run long time consuming process on mulitple core?

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Server :: Possible To Run Process On 1 Core In UNIX?

Jan 24, 2011

I`m looking for solution. Is it possible to run process on 1 core in UNIX ? From time to time I must start some very CPU consuming process and unfortunately this process is running on all cores... so at this time working on PC is very hard.

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Programming :: Allocate A Cpu Core For Kernel Process?

Aug 3, 2010

My system has Intel Xeon 4-core cpu(hyperthreading 8-core) and run 64-bit linux. I want to allocate one core for general process(kernel process & other processes). And then, I want to allocate the rest of core for the specific multi-thread program.

Q1: I know that I can pthread_setaffinity() for user-mode thread and mpstat for monitoring. So, how can I allocate a core for kernel process and monitor it?

Q2: How can I restrict use of the cores for the multi-thread program? I don't want kernel process to use the cores for the multi-thread program.

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General :: Child Process Does Not Core Dump

Jul 27, 2011

In my program, I fork() to get a child process. Because of some problem, child process terminates by a segmentation fault. Parent process is still running. I have compiled my code with -g option. I have done: ulimit -c unlimited. I am not getting core dump of the child process. How can I get the core dump of child process?

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Software :: Process Crashing With No Core File?

May 14, 2011

A process from some software I am running keeps crashing with seemingly no real pattern. I ahve tried using ddd/gdb to run the process in question but everytime it crashes no useful information is returned. I also tried getting a core file with the same result. It seems as though according to linux the program has exited normally.

This obviously points towards the process itself having a bug but there are other instances of the same program running on other machines in the network with no problems at all.

I have made comaprisons of hardware/drivers (lspci etc) installed on various machines and all are exactly the same as the machine in question so my question is (at long last): What else should I be looking for?

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Software :: Install Older Version Of Gcc 2.95.3 In Fedora Core 8 Or Fedora Core 12?

Mar 14, 2010

i download the rpm package of gcc .

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Fedora Installation :: Dual Core Only Showing Single Core On F14?

Nov 3, 2010

I just loaded F14 on an old Dell Dimension 3000 with a dual core processor but only one is showing. Here's the output from top:

processor: 0
vendor_id: GenuineIntel
cpu family: 15
model: 4

[Code]....

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General :: Unix Command That Allows To Know Which Process Is Running On Processor Core?

Mar 16, 2011

Unix command that allows to know which process is running on processor core?

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Fedora Installation :: Upgrading From Core 4 To Core 10?

May 20, 2009

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?

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General :: Difference Between Fedora Core 4 And Fedora Core 14?

Jan 12, 2011

I am in school for my CIS degree and the book I am using this session covers Windows XP and Fedora Core 4. I am having trouble finding & downloading Fedora Core 4. My question is: Is there a big enough difference between Fedora Core 4 and Fedora Core 14 that I would not be able to use 14 instead of 4?

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Red Hat / Fedora :: Identify An Usb Device

Sep 10, 2010

When I mount an usb device, I want to get the information contained in the structure usb_device. This information tally with the device which is being mounted now (dev_name). So I want to get, for example, the path where the device will be mounted (/dev/sda) before it is mounted naturally.

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Fedora Installation :: Identify Partition Location - Getting The FEDORA Bootloader To Find The PREUPGRADE Kernel

May 29, 2010

Going from Fedora 12 to 13. Got to the point where I have to reboot to install, system reboots to 12. This is a triple boot system with Open Suse and Mint, and the grub2 bootloader from Mint is the bootloader for the whole shebang. In the "how to use preupgrade" instructions there's a line that says "dentify the drive and partition of your Fedora /boot folder." How? If that sounds odd, consider that in my set up "computer" shows 4 partitions (and with just three operating systems..?). I can mount them, but have a problem telling which sytem is Fedora, Suse or Mint. And getting the FEDORA bootloader to find the PREUPGRADE kernel ... Momma said there'd be days like this.

cat /etc/fstab just returned /dev/sda1 on /boot. I installed Fedora first, before Suse or Mint, so being on the first drive or partition sounds right, but the multiple drives throws me, and "just guessing" doesn't seem like the way to go.

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Red Hat / Fedora :: Command To Stop That File/process Or Is It Just Kill The Process To Stop The Process?

Nov 11, 2010

I've some file with .sh extensions that runs some softwares.Now,how do I stop running that filesI know we run the command ./start_tomcat.sh to start the apache.Is there any command to stop that file/process or is it just kill the process to stop the process

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Fedora :: How To Identify And Limit Home Volume Of Users

Aug 24, 2010

How to identify how large the home volume of users? I wanna know how large are the volumes of each users and I also want to limit one of the users. I just want him to have about 500mb. How to I do this?

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Ubuntu :: Run Dual Core - Crash - Single Core Runs Perfect

Apr 1, 2011

i am running gigabyte GA-M68M-S2P and AMD sempron 2.7. the problem is when i try to run dual core. it will boot and run for 2mins then it crashes. single core runs perfect.

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OpenSUSE :: Get Application To Utilize More Than One Core In Multi-core Setup?

Mar 27, 2011

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

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Ubuntu Installation :: Dual Core Support Core 2 E8500 Out Of Box?

Feb 14, 2010

Just a quick question. Does Kubuntu Karmic support core 2 E8500 out of the box or do you need the SMP kernel?

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Programming :: Multi-core Support - Control On What Core Will A Thread Run

Oct 31, 2010

Is there any Linux API that will let me control on what core will a thread run? If not, do I have to use assembly language?

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Debian :: Wheezy Only Recognizes 1 Core Or Dual Core CPU?

Sep 7, 2011

I have now installed Wheezy on two different hard drives and in each case it seems only one CPU of my dual core CPU computer is recognized. System Monitor, Gkrellm and lscpu show just one when prior to the new install the old Wheezy showed both CPU's. I have put the hard drive into two other computers with dual core CPU's and all show just one CPU.

Interestingly System Profiler and Benchmark (hardinfo?) > Devices > Processors now show a large amount of processor infomation when with the old Wheezy I would only see both CPU's listed and nothing else.

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Ubuntu :: Lucid Lynx - Dual Core - One Core Always At 100%

May 15, 2010

I've a Compaq CQ61 laptop, and i noticed that one of the cores is always at 100%.

I didn't check the duration of the battery but surely it will "eat" my battery in a hurry

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General :: Only One Core Of Dual Core Processor Are Working

Mar 14, 2011

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.

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General :: Processes And CPU 4-core - Which Core The Program Used?

Mar 26, 2011

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?

2 - How can I know which core the program used?

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Programming :: Core Dump Issues. Program Crashes But Does Not Generate Core Dump File?

Oct 7, 2009

I want to generate core dump files from my program when it crashes. Its a pretty big process and has about 10-11 threads in it.I have followed the documentation to enable core dump by setting ulimit to unlimited etc. I quickly tried "A demo program creating a core dump" from the following webpage, which succeeds in Segfault and dumping a core file in the directory that I configured.However, I tried running my original program and caused it to crash. I did this by making calls to kill(), raise() or the same null pointer access as shown in the webpage above. In each case, my program crashed but did not generate a core dump file. Am I missing something?My program is in C++ and my environment is Redhat 9.0 (kernel 2.4.20)

Going through the "Why do I NOT get a core dump?" section on the same webpage as above, I can see two potential problems. One - there are issues with the suid/sgid (bullet # 6). I am not able to change any settings with suid because my system does not contain either /proc/sys/fs/suid_dumpable or /proc/sys/kernel/suid_dumpableTwo, my program has threads in it and the bullet # 8 is the problem.

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CentOS 5 Hardware :: Infiniband (mlx4) Works On 16-core System But (now) Fails On 32-core System

Jan 27, 2010

We have a small cluster of 20 HP systems, all running CentOS 5.3 in an NFS-root environment. Half are quad-socket, quad-core Xeon E7340 @ 2.40GHz (total 16 cores), the other half are 8-socket, quad-core Opteron 8354 (total 32 cores). All systems have a Mellanox Infiniband adapter ("Mellanox Technologies MT25418 [ConnectX VPI PCIe 2.0 2.5GT/s - IB DDR / 10GigE] (rev a0)")

With kernel 2.6.18-128.1.6.el5, infiniband works fine on all systems.

With the update to kernel 2.6.18-164.11.1.el5 (and both types of node running the same NFS-root image), the 16-core Xeons still work fine. Infiniband no longer works on the 32-core Opterons. Specifically, either the ib0 interface fails to appear, or it does appear but when configured with an IP address, doesn't actually work. In either case, loading the IB kernel modules takes a long time, but I haven't instrumented the load script yet to see which module, if any, is at fault. More errors listed below.

However, if I tweak the BIOS of the 32-core systems to reduce the per-socket core count to 2 (so effectively 8-socket, dual-core, down to a total of 16 available cores), Infiniband starts working again. Putting it back to 32-cores makes it fail. Booting the older kernel makes it work again. In summary: old kernel, IB works on all systems. Newer kernel, IB only works on 16-core systems.

Updating the IB firmware from 2.5.0 to 2.7.0 (latest available) doesn't help. I also did a full 'yum update' to make sure that libmlx4, openibd all other associated packages were up-to-date. Doesn't help either.

Some errors that appear on 32-core nodes:

ib_query_port failed (-16) for mlx4_0
ib_query_port failed (-16) for mlx4_0
mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16)
mlx4_core 0000:04:00.0: SW2HW_MPT failed (-16)

[Code]....

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