CPU-usage or CPU time is the amount of time for which a central processing unit (CPU) was used for processing instructions of a computer program.
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Can't diagnose why all of a sudden my computer is incredibly slow even though the cpu%, or mem usage doesn't change
I have had 3 operating systems(Ubuntu, Win7, Win8) on my computer and I have reformatted the drive for every new install. Sometimes all of a sudden my computer is really slow(I can barely minimize a ...
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1answer
135 views
What is the impact of running the CPU at 100% for long periods at a time? [closed]
Possible Duplicate:
Is it ok to have 100% CPU usage constantly
I recently upgraded computers and with this upgrade I decided to try Seti@Home to run in the background. I was watching the ...
3
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0answers
89 views
Windows 8 Consumer Preview - Full Core CPU Utilization by system process
I have a Lenovo X220 laptop on which I've installed Windows 8 Consumer Preview. Sometimes though it'll get stuck using 100% of a CPU core though in the SYSTEM process, and there's nothing I can do to ...
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54 views
Computer Lockup
I have a small computer that I am running a video application on (video conferencing-style). At inconsistent times, it will 'lock up' - video will freeze, if I am telneting into it from another ...
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0answers
13 views
How can I be alerted when a process goes idle (that is, its CPU usage reaches zero for a sustained period on Windows 7?
How can I be alerted when a process goes idle (that is, its CPU usage reaches zero for a sustained period on Windows 7?
Essentially, I have a long running batch process that is pegging one of the ...
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0answers
61 views
Virtualized guest vs host CPU usage
I am using qemu with kvm as my hypervisor. I am running a gentoo guest on an ubuntu host. The guest is being given a single processor.
When I run a compute intensive job (say empty-loop) I get almost ...
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1answer
65 views
MayaBench (rendering) only using 25% CPU; Other software uses 100%
So here's my frustration.
I have a
Intel 2600K 3.4Ghz OC @ 4.8Ghz
ASRock Z68 Extreme 4 Mobo
16GB 1600mhz DDR3 memory.
When i run MayaBench for rendering, I get this wierd bumpy shit.
while ...
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3answers
101 views
How can I ensure that exactly one process is running on a given processor/core?
I would like to do this so I can accurately speed test my processes, and just to be able to have the illusion of control.
Maybe I want to reserve one processor for special programs. Maybe I want to ...
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2answers
481 views
Firefox 12 CPU at 99% and making Macbook Pro hot
I am running Firefox 12 on a Macbook Pro, and it keeps going up to 99% CPU usage, I can hear my computer revving up and feel it getting hot. The previous version did this as well.
I don't have any ...
2
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2answers
208 views
linux migration/N high cpu consumption
on my linux appliance based on 3.0.0-14 kernel I got:
RPN:/tmp# ps axuf | grep migration
root 6 92.9 0.0 0 0 ? S Apr23 2788:33 \_ [migration/0]
root 7 99.7 0.0 ...
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2answers
166 views
What is causing sudden freezing during running real-time program?
So I run a high intensive (CPU/GPU) real-time program. During normal execution suddenly everything freezes for 1-4 seconds. I opened "Process Explorer" in the background to help gain insight and maybe ...
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1answer
194 views
CPU Usage 100% With No Explanation
I just recently switched my AV from Avast (subscription was up) and installed the Norton 2012 package provided for free from my ISP (Comcast) about two months ago. I use my HP G62, dual core, 2.1 GHz, ...
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1answer
217 views
CPU Usage at 100% with “Hardware Interrupts”
After turning on my desktop one day, I found that my CPU usage was maxed out at 100%, with most of that going to hardware "Interrupts":
I tried to enable/disable all my devices one by one through the ...
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1answer
173 views
Ubuntu not balancing cpu usage among cores, making load go up
I am running 10 processes that each use 20-70% of a core of an i7-920 with 8 cores on Ubuntu 11.04. CPU scaling is turned off.
When I look at htop, I see that cores 4 and 8 are almost unused, while ...
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2answers
173 views
linux ' top ' get total of a user's cpu usage > 100%, with IRIX mode off
I used ' top -bn 1 -u myaccount' to monitor the summary of all the cpu usage of my account.
But sometimes my log shows that the summary adds up to 160% plus.
I'm quite confused, does anybody know ...
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0answers
74 views
Windows 7 and laptop overheating
I am using ArchLinux 99% of my working time, and laptop has absolutely no heating problems. But when it comes to using Windows 7, laptop starts heating and one can clearly hear CPU fan working like ...
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0answers
48 views
CPU gets eaten everytime I connect to apache when using COMODO Internet Security Premium
I host simple server (django+postgres) on apache and I am using COMODO Internet Security Premium. Every time I make query from external IP (for example, from my smartphone) cmdagent.exe eats up to 40% ...
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2answers
140 views
What tools exist for monitoring the CPU and memory utilization of Firefox?
Firefox appears to using too much memory and cpu even when it is idle
What tools exist for monitoring the CPU and memory utilization of Firefox?
I am thinking of an equivalent of Sysinternals ...
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5answers
259 views
Why does the CPU usage reach 100% when laptop is plugged in?
I have an HP Elitebook 8440p with Windows 7 Ultimate, i7 Processor and 8 GB RAM.
For the last couple of days, when I plug-in my laptop for charging, the CPU usage shoots up to 100% and remains there ...
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1answer
187 views
apache: cpu usage per virtual host
Is there any tool that can provide statistics about cpu-usage per virtual host?
This way I can understand which is the website that causes 100% spikes in CPU usage.
Thanks!
if this is not possible, ...
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9answers
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How can I produce high CPU load on Windows?
For testing purposes I need to generate high CPU load on a Windows Server 2003.
I cannot install any software but have to make do with what Windows provides.
What would be the best way to achieve ...
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1answer
521 views
My cpu usage increased to 100% and my computer works slowly after dis assembly
Yesterday, I opened the case of my computer and cleaned the cards and other devices. When I re-assembled the computer and powered it on, Windows 7 works very slowly and the CPU usage in the task ...
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1answer
196 views
Proccess System.exe cosumes a lot of CPU in Windows Server 2008-r2
I have a PC with Windows Server2008-r2 and in the proccess list the proccess System.exe consumes a lot of CPU constantly. Can you help me?
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2answers
186 views
How To Determine Which Tab In Internet Explorer Causes High CPU Usage?
I have high CPU usage in one of a few iexplore.exe *32 processes that i see in Windows Task Manager. Is there a way to identify which tab causing CPU spikes just like it is possible in Chrome?
...
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2answers
238 views
Limit CPU usage / Cores on AIX process?
We have two processes running on an AIX machine, one is Oracle the other is Business Objects. BO takes nearly 100% CPU cycles when running and Oracle is unable to process at an acceptable speed ...
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1answer
178 views
Heavy CPU Usage for Interrupt
As a follow-up to the question
Why can't my computer speed up again after closing large applications?
… I used Process Explorer to check my PC.
I found that there's an average 30-40% of CPU ...
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2answers
54 views
Distributed computing project? [closed]
I've tried seti@home and folding. But are there any other good ones that might have better luck actually making a difference?
I don't want to contribute to a project that is going to use the results ...
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1answer
158 views
Program that logs the CPU usage in Windows 7
Is there any program that logs the CPU usage of all programs? I want to know, over a period of one month, which programs use the CPU more intensely.
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2answers
726 views
Strange cpuinfo, how many cores does these physical cpu has?
At the end of this post is my /proc/cpuinfo.
I know the Physical cpu number is 2
grep 'physical id' /proc/cpuinfo|sort|uniq|wc -l
2
But how many cores does each cpu have?
The 'cpu cores' shows ...
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0answers
277 views
Is Windows 7 throttling my CPU?
I am hoping someone with more experience in Windows 7 can help me out. I have written a php script that utilizes curl_multi to do some spidering. This script runs on an install of WAMP. I originally ...
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1answer
244 views
How is load average calculated on osx? It seems too high - and how do I analyze it?
An advanced question: I think my load averages are too high as compared to a linux system. I have around 0.40 1min with basically no cpu use (0-1%) and even if this is spread out over 4 cores it still ...
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1answer
123 views
identify which chrome tab is using up CPU in Linux?
In my Linux laptop, I sometimes have a bunch of tabs opened in Google Chrome, which I believe creates a new process per tab. I would like to be able to pinpoint the tab that is using up the CPU. Is ...
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votes
2answers
131 views
My CPU doesn't seem to be worked beyond 20%
I have a i3 based system running Windows 7. I have noticed that even during intense activities like copying GBs of data the CPU doesn't exceed 25%. I have no malware.
Some questions based on that ...
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1answer
376 views
ffmpeg not using full CPU power
I have a Dell Precision 490 workstation, running Ubuntu 11.10, with two dual core Xeon 5160 CPUs (so 2 physical CPUs, with 2 cores each), which I am using to encode TV recordings (MPEG2) to H264 using ...
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1answer
883 views
Why is wpffontcache_v0400.exe hogging the CPU?
In the last few days I've noticed really poor performance on a virtual machine I'm using at work. It's running Windows Server 2003 SP 2. When I check Task Manager, the process wpffontcache_v0400.exe ...
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1answer
340 views
How can I reduce high CPU usage from DPC's with USB Serial Ports
I have an app that communicates with up to 50 devices over serial ports. The communication takes place in threads, and the threads are throttled so that only a certain number are active at once. ...
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0answers
282 views
Synergy stopped working after a week on Windows7, high CPU usage and no connection
Used synergy 1.3.1 & 1.3.4 since 2007 without a hitch. Upgraded to Windows 7, and synergy suddenly stopped connecting after a week. Now any version I try (1.3.1, 1.3.4, 1.3.8, 1.4.5) goes into ...
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187 views
Msmpeng.exe is Making Me Tear My Hair Off!
msmpeng.exe causes CPU spikes that happen every 15 mins or so, and it has finally got to me. As far as I can remember, I started facing this after installing MS Security Essentials on my Windows 7 ...
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1answer
76 views
“svhost(netsvc)” is using about 40-80% CPU when the system starts
My CPU usage is constantly at 40% (maximum 95%) most of the time when I start my PC. It continues to work at this rate for about 15-25 minutes.
I checked the performance monitor and found out that ...
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2answers
1k views
taskhost.exe uses a lot of CPU and does not quit
The executable taskhost.exe is running twice and one process takes more than 50% of CPU. It increases the fan noise and slows the computer down. When i end the process with task manager the computer ...
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2answers
108 views
Why the startup of a new application causes system stuttering
All modern operating system are supports multitasking. So, each running app would get a certain amount of time slice from cpu for their operation(depending on their demand).
The questions is, if the ...
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1answer
221 views
Record CPU usage then create Excel line chart with “Series” Column
I need to create a line chart to display the cpu usage of each process over time. How do I create the chart with time as the X axis, %CPU as the Y axis, then use the command name to indicate which ...
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1answer
181 views
Windows XP - Explorer CPU spike and freeze
System: Windows XP SP3, Intel i3
Issue: Windows Explorer process spikes my CPU usage to 50% and freezes. Only resolution is to kill the process in the Task Manager and restart manually.
...
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1answer
187 views
Intel Core i3-2310M or Intel Core i5-2435M 2.4GHz [closed]
I'm a web developer/photographer, so Visual Studio and Photoshop may be the heaviest programs I use. I currently have a 2.47 GHz Intel Core 2 Quad Q6600 desktop and need a laptop which I hope will ...
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1answer
130 views
Why does top report more than the theoretical maximum CPU usage of a machine?
I would like to know why I have a process being able to report a usage line like:
PID COMMAND %CPU
248 Xcode 983.5
… in top on a quad core CPU?
I understand it's wrong, but how come? I'm ...
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votes
2answers
523 views
opendirectoryd consumes 40% of CPU
I have a MacBook Pro with Lion 10.7.2, 2.26 GHz CPU and 2GB DDR3 RAM.
If I call
top -o cpu
the /usr/libexec/opendirectoryd process consumes more than 40% of CPU.
$ ps aux | grep opend ...
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1answer
169 views
How to prevent my Windows 7 to hang when running intense calculations on all cores?
When i am using all my 4 cores, its really slow to open any folders or even right click on desktop, or open any programs, and so on.
Is there any way to prevent my Windows 7 from using 100% of my CPU ...
2
votes
2answers
469 views
What does “thread” mean as related to CPUs? [closed]
Possible Duplicate:
What are threads, and what do they do in the processor?
I know a process can have multiple threads, on my Windows 7 machine each process has over 10 threads in avg.
...
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vote
1answer
198 views
How Do I Investigate a CPU Usage Spike Without Being Present?
I have a server that's mysteriously using up a lot of CPU late at night, when it shouldn't be under heavy load. This causes some database calls to time out, and I've set up some alerts in PerfMon to ...
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2answers
369 views
How do I troubleshoot high CPU usage?
My CPU usage is very high by default. As soon as I starts a program it touches the maximum. After some time it becomes normal. I have a doubt that my disk is infected. So I tried to install ...
