0
votes
2answers
32 views

How do binary files run on different machines?

I always wondered about how executable binary files actually work. Compilation is always stated as taking the source code and translating it to machine language But what does that really mean? ...
1
vote
0answers
25 views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
0
votes
0answers
20 views

How to fetch memory and cpu usage for a process - linux

I wants to fetch all the information about a process ( amount of memory consume, cpu utilization, dump information ) like as displayed in $vmstat I have write down a script but that is not displaying ...
2
votes
1answer
28 views

How do I use linux processor affinity to dedicate 2 cores to user1 and 2 cores to user2?

at first I wanted to dedicate 2 cores(4 threads) to one java PID, and 2 cores(4 threads) to the other. However the volatility of these programs makes me think that they will end up crashing and ...
0
votes
1answer
29 views

How much memory is being used on the gpu by each PID?

How do I know how much memory on the GPU is being used by each process, CUDA compiled code using 1 processor, accessing 1 of 2 M2090 Tesla cards available on a 16 core node on an HPC? ...
1
vote
0answers
22 views

Both cores run constantly at 100%

I run a dualboot Fedora/Windows 7 computer. It will work fine for the first ten minutes or so after booting, after which it is rendered completely useless and slow. CoreTemp gives that both cores ...
12
votes
1answer
1k views

How does Linux `uname -m` get its information?

Where does Linux uname -m get its information from? I am asking because I have a machine that is 64-bits for sure, and uname -a and uname -r confirm that, but uname -m prints i686. Where does it get ...
0
votes
0answers
63 views

Intel Xeon stuck at 800mhz CPU Freq on RHEL 6.5

Currently running into a headache trying to figure out why my CPU speed is stuck as such a low frequency. After doing some research, I found that cpuspeedutil does actually control the state of the ...
0
votes
0answers
88 views

Malware on my Linux? Cant see on top/htop but CPU/Mem Usage is high

Over about the last week or two, I have been seeing something odd with my Linux mint PC. Over a day or 2, at some point, my CPU usage hits and saturates at or near 100 at some point (according to my ...
0
votes
0answers
22 views

DSP working at 100% - Will a Sound card upgrade fix that?

As the title suggests, I'm doing some editing in Ardour and during the export, the status indicators in the top right corner states the DSP unit consistently working at 100%. This definitely shows ...
3
votes
2answers
110 views

/proc/cpuinfo doesn't show CPU frequency at all

/proc/cpuinfo doesn't show CPU frequency at all. I built the kernel on my own. Did I miss some kernel configuration? pi@raspberrypi ~ $ cat /proc/cpuinfo processor : 0 model name : ...
0
votes
1answer
711 views

Ubuntu 13.10 High CPU Usage

I recently installed the latest version of Ubuntu. It runs great but there is one problem. Very high CPU loads. When I have chrome open, the computer is commonly running at about 50% load. When ...
0
votes
1answer
89 views

Who starts updatedb process and why it uses 700+% CPU?

I have a VPS running CentOS, and recently its CPU usage goes over 700% for two times already. It always turns out to be a process named "updatedb" (as show in the figure below). After a quick ...
1
vote
0answers
20 views

Resource balancing between users?

I have a cluster of Linux computers that are shared by many users and want to ensure that no user can flood the systems and effectively prevent others from running anything. i.e. If user A is running ...
0
votes
0answers
31 views

probe processor voltage in linux

I am in a redhat server I've tried to use lm-sensors to detect my processor's voltage, just like CPU-Z in windows environment. But after I using the command "sensor-detect", only processor's ...
1
vote
1answer
75 views

CPU heating too much, cpufrequtils to limit its speed works weird

I am using an Intel i5 powered laptop and my OS is a 64 bit Linux Mint 14, kernel version 3.5.0-43. Up until now the CPU usage policy was ondemand and it usually was working at 2.40Ghz. In this setup ...
2
votes
1answer
112 views

Can a kernel that supports multi-core reduce cpu overhead, reduce cpu overheat

I found only a single core as identified by kernel from /proc/cpuinfo. Therefore I am installing a 686 pae kernel to identify all cores and get multi-core functionality. I read about how a process ...
0
votes
0answers
53 views

X server 100% CPU

Our X server sometimes gets stuck at 100% CPU, locking up the systen. From Googling, it seems that this is prob. not a bug in the X server, but in some application that uses it. The workload the ...
1
vote
3answers
536 views

Is having more CPU cores a better thing for running a web server?

I was reading about how User threads are mapped to kernel threads on Wikipedia. From this article I understand that FreeBSD uses the 1:1 (Kernel-level threading). So each User thread created by the ...
-1
votes
2answers
156 views

What is the operating system that routinely runs the fastest processors [closed]

Someone said that Linux is the fastest and or most powerful operating system that is much more powerful than any other operating system and not sure where to look to discredit her. Is there a way to ...
0
votes
2answers
77 views

CPU fan extremely fast even with 0% CPU

I just reinstalled my operating system (Crunchbang on Debian testing), and all of a sudden the fan is running as fast as it can even with 0% CPU. The air coming out of it is cold. The only CPU ...
1
vote
1answer
218 views

CPU Thermal Margin is very low

My computer is restarting unexpectedly for some days. First I though Its an os issue. I gone through all the sys log and didn't find any clue. Then gone through bios event log. Nothing was there too. ...
2
votes
1answer
188 views

How to interpret this /proc/cpuinfo data?

I'm using Intel Xeon E5-2620 processor. These are something I'm confusing about. I'm using Linux and in /proc/cpuinfo it says model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz According to the ...
0
votes
0answers
94 views

Get CPU core voltage values on linux server

I'm on a RedHat 5 server, with lm-sensors 3.3.4 installed, and I executed sensors-detect and then run "sensors", then it just output: No sensors found! Make sure you loaded all the kernel ...
0
votes
0answers
183 views

Set smp_affinity_list to use all cores

eth3-rx-0 uses 91% of core26 in my system, I would like to spread the load across all cores, but for some reason only one core is always been used. what I've tried: echo "0-31" > ...
1
vote
0answers
48 views

Software to test hardware platform [closed]

I'm a developer of applications working on embedded Linux (Arago) running on ArmV7 processor, NAND flash storage, 512 MB of RAM, Ethernet, WiFi/BT module and from time to time I encounter the whole ...
0
votes
1answer
308 views

100.0% interrupts on one core

Why interrupts doesn't spread across all cores? Cpu0 : 0.0%us, 0.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi,100.0%si, 0.0%st Cpu1 : 25.2%us, 32.6%sy, 0.0%ni, 12.6%id, 26.2%wa, 0.0%hi, 3.3%si, ...
0
votes
2answers
73 views

How to get the spec of a machine on Linux?

I am interested in getting the spec of a machine, because I am thinking getting a similar server. What I am mostly interested in knowing is the number of cores / CPUs / etc., the amount of memory, ...
2
votes
2answers
278 views

Control Linux CPU load for testing

I wish to carry out some testing on a range of Linux devices to see their power consumption based on current processor load. As such I am looking for a program I can use to force the CPU to use X% ...
0
votes
1answer
97 views

How should I prioritize specs for a Linux Kernel development workstation/system? [closed]

I'm working on a Linux Kernel development project (specifically OpenEmbedded/Yocto Project) in which kernel and embedded software compilation is the primary task and my laptop with a dual-core Core ...
0
votes
1answer
192 views

how to disable Hardware prefetcher in core i3/i7

Is there any way to disable the hardware prefetcher in Intel core i3 /i7 ? Although I have posted related question in stackoverflow, but no solution till now. ...
0
votes
0answers
107 views

Ubuntu Heating Up, Continuos Fan, Hadoop Installation Worries

I have a laptop, Model: Compaq Presario CQ40 RAM: 2.7 GB RAM Processor: AMD Athlon X2 Dual Core QL - 64*2 OS - Dual Boot: Ubuntu 12.04.3 LTS 64 bit (AMD64) Windows Vista 32 bit (Factory ...
2
votes
1answer
571 views

laptop is getting too hot after switching from Windows 8 to Ubuntu 13.04

Ever since I switched from Windows 8 to Ubuntu 13.04 my Laptop is getting way to hot. When I run sensors I frequently get something like: acpitz-virtual-0 Adapter: Virtual device temp1: ...
0
votes
2answers
146 views

Grid Engine / multithreading / multi-core / multi-cpu: How to decide optimum number of threads?

I am using a program (*) under unix/linux (various flavours) on various servers and clusters, the program supports multithreading. I can specificy how many threads I want via command line option. ...
0
votes
2answers
70 views

How can I know the total of used processors by user in Linux?

How can I know the total of used processors by user in Linux? For example: User "X" runs 2 (or more) processes that use in total 3 processors. How can I know it? If it impossible, then How ...
0
votes
1answer
248 views

Can Intel Xeon Phi improve ffmpeg performance?

I'm building a server for video encoding and I'm planning to use the latest Xenon e5-2697 v2. Can Xeon Phi help me improve ffmpeg encoding performance? a bit confused by this new "processor" ...
0
votes
1answer
115 views

Use all processor cores, 1 core/per 1 thread in *nix

According to xz documentation the "-T 4" means I should be using 4 threads, each compressing a different part of the file simultaneously. Before using nice -19 I would only get %50 usage of 1 core, ...
0
votes
1answer
216 views

Is using top a robust way of measuring system CPU usage?

I got confused while reading this question on stack overflow. The asker says: "'top' will simply not do, as there is a delay between cpu dumps, it requires 2 dumps and several seconds, which hangs ...
0
votes
0answers
185 views

core dumps kernel.core_pattern and abrt

I have some trouble understanding the behavior related to core dumps. I know the kernel.core_pattern specifies the pattern of core dumps and if it contains a directory it uses that location for ...
1
vote
0answers
85 views

Notebook running hot with ArchBang

This is my first installation of Arch, so I may have forgotten something. After booting it, the laptop quickly starts to became hot. I've been reading documentation on Arch wiki, but didn't found ...
0
votes
1answer
93 views

What does the CPU *really* do during memory instructions?

I was recently testing out the linux cpufreq module and noticed that regardless of whether I was running a CPU intensive benchmark or a memory intensive benchmark, the cpufreq module always chose the ...
0
votes
1answer
209 views

How much hard drive space is needed for Linux and Windows

I want to install both Windows 8 and Linux on my PC and was was wondering what is the minimum amount of hard drive space that I will need to accomplish this. Also, are there any apparent pros/cons to ...
1
vote
2answers
2k views

High CPU load due to MySQL on Linux

I am facing an High CPU load due to MySQL process. I googled to get rid of this error but no luck. I found solutions on Google like its happening due to low disk space however on my machine the df -f ...
0
votes
0answers
78 views

Overheating iMac(2008) with kubuntu 12.04

I have an 24 inch iMac from 2008 and I installed Kubuntu 12.04 on it. The problem is: if I' m running and CPU-hungry program(Android Emulator, Virtual Box), the CPU goes to 80C. Also the screen is ...
0
votes
1answer
38 views

Dozens of spontaneous reboots

I am working on a SUSE Linux based system that runs 24/7 and has done so for around 3 years although I cannot say that it has not been rebooted in that time. At 9th June there apparently was some sort ...
0
votes
1answer
185 views

How can i write my CPU temperature into a file on linux

Recently i install lm-sensor for monitoring my CPU temperature. I am monitoring it by this command in terminal : while [ true ]; do sensors; sleep 1; done but i need access my temperature after i run ...
2
votes
1answer
429 views

Driver mount.ntfs-3g is using way to much cpu

ATM I'm downloading a movie with deluge which is 12GB big. This is a single .mkv file but the weird thing is that when I download this and I use NTFS-3G to mount my USB to debian it uses 99% of my ...
0
votes
0answers
1k views

linux kworker's CPU percentage extremely high

I have a laptop with i7 processor and ATI video card, all the distros I'v installed have a common problem -- there is always a kworker(kernel thread) occupy 40% of the CPU, (i.e. one of the 8 logical ...
1
vote
2answers
620 views

CPU stat tool for CentOS?

I'm looking for a tool that outputs very simple usage information on the CPU at certain intervals. I think I've used a tool like this before a few years ago but cannot remember the name. I want to ...
0
votes
1answer
172 views

Using awk or cut command to get CPU percentage

I am trying to execute a Linux command through a PHP script to get the CPU percentage for each core: … with cut: $output = null; passthru("mpstat -P ALL | grep 0 | tr -s ' ' | cut -d ' ' -f 4", ...