CPU usage indicate how much of a workload is being handled by the CPU.

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95
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3answers
73k views

Why does MDS run wild in Mac OS X 10.6?

I've been having trouble with the MDS process running wild on my MacBook Pro 13". I've read on other support forums indicating that improperly formatted external drives can be an issue, but I have no ...
38
votes
3answers
23k views

What does load average mean in unix/linux?

If I run uptime, I get something like this: 10:50:30 up 366 days, 23:27, 1 user, load average: 1.27, 2.06, 1.54 What do those numbers on the end mean? The man page tells me it's "the load ...
33
votes
12answers
34k views

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 ...
31
votes
6answers
16k views

Determine which tab in Firefox is using CPU resources?

Is there anything in the current Firefox 3.x similar to shift-esc in Google Chrome? There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with multiple windows, ...
15
votes
2answers
3k views

Determine which Opera tab uses 100% CPU?

Sometimes a tab gets stuck at using all CPU time it can get. I know theres a way to check which one for Chrome or Firefox -- is there a native method and/or extension to do this in Opera? Checking ...
14
votes
2answers
20k views

What is a CPU tick?

Question: How is a CPU tick calculated and what does it represent? Does a single tick equate to 10 miliseconds thus if some thread reported not called for (5 * 10 ticks = 500 ticks) does this mean ...
13
votes
3answers
11k views

Why is the CPU usage reported by top in Linux over 100%?

I've seen the CPU usage go over 100%. How is this possible? Is it because I have four CPU cores, so 100% isn't really the max? Also, when a program does this, what else can I do in top besides using ...
11
votes
3answers
4k views

Windows 7 Firewall services consuming all CPU

I have Windows 7, 64-bit, installed on two computers: my Dell Dimension 5150, and my Dell Latitude D830. Today's gripe is this: Sometimes I look at my CPU usage thingie and I see something like ...
10
votes
2answers
965 views

Is it okay to have 100% CPU usage constantly?

I often do 3D rendering in the background which consumes 100% of the CPU (I lower the priority of the process so that it does not hinder any tasks I am working on). My concern/question is whether it ...
10
votes
1answer
17k views

High CPU usage by the “system” process

I have noticed that from some time my system is freezing and its probably caused by the high CPU usage which is caused by the system process. All applications I'm running is the Skype, TeamSpeak and ...
10
votes
3answers
3k views

Why does my iTunes use so much CPU time?

I have a roughly 2 year old Macbook (10.5). I have iTunes 10. When iTunes is playing MP3s, I see CPU usage of the iTunes process in the system monitor ranging from 65%-75%. When I pause the music, I ...
9
votes
3answers
13k views

Task Manager shows 100% CPU utilization, but nothing in process list does

I'm using WinXP, and I notice that in the Task Manager, on the Performance tab my CPU usage is 100%. But When I go to the Processes tab, and sort by CPU System Idle Process is taking up 90%. I've ...
9
votes
6answers
6k views

Finder Using Nearly 100% CPU

I'm having a problem where the Finder uses WAY too much CPU time. It's using up to 100% of one of my cores. I'm running 10.6.2 on a MacBook Pro w/ 6GB of RAM, plenty of fast (SSD) disk space. I also ...
9
votes
2answers
2k views

Limit CPU usage for flash in Firefox?

How can we limit the CPU usage of Flash plugins in Firefox ? I do not want to disable Flash, but I don't need to Flash objects to run at full speed either, in order to save battery power.
9
votes
3answers
2k views

When steam is downloading it uses all my cpu

My friends say it's just me, but whenever Steam updates or downloads - which can take hours - it uses 99% of the CPU, makes everything else slow, and is itself glacial to respond at all. Does anyone ...
8
votes
10answers
93k views

How do I troubleshoot high 'svchost.exe' usage in Windows 7?

I'm having a problem with Windows 7 64-bit. I thought it was slow and all, but then I saw that the CPU usage was always around 80% and started searching for a solution. There are two svchost.exe's ...
8
votes
2answers
4k 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 ...
8
votes
4answers
10k views

Linux: command to know the processor number in which a process is loaded?

Is there any command in linux to figure out , given a process, which processor the process is running? I am interested in figuring out the CPU busy and CPU idle time of that processor.
8
votes
4answers
5k views

CPU usage at 100% for several hours

if I use the processor to 100% constantly for several hours, Does that will damage the machine?
8
votes
4answers
1k views

Multicore CPU energy requirement and load balancing

I am interested in load balancing for multicore CPU systems. If you use 1 CPU with multiple cores, is it more energy efficient to balance the load on several cores, or try to fill up single cores and ...
7
votes
6answers
37k views

What is the relationship between CPU usage and RAM?

I have seen many times that my CPU usage is 100% and my RAM is only occupied for about 50%. What is the relationship between these two? How does one's performance affects the other?
7
votes
5answers
11k views

Why does Firefox cause high-CPU-usage “spikes” every few seconds?

When I start Firefox, I have no problems for a while, but after a couple of days, CPU spikes start to occur. During a spike, Firefox freezes and then stops. Spikes occur every seven to ten seconds, ...
7
votes
4answers
2k views

Why is my CPU usage broken in Process Explorer?

On my system (Windows 7), it seems that Process Explorer is reporting the wrong CPU usage: When Firefox is running, I constantly get 30%+ When I kill Firefox, I still get about the same CPU usage ...
7
votes
2answers
6k views

How to decrease the CPU usage when running Virtual Box?

I am facing an issue with 100% CPU usage under my system when running VirtualBox. Here are some further details: My System Information: CPU 1 name: Intel(R) Pentium(R) Dual CPU T2310 @ ...
7
votes
4answers
10k views

spoolsv.exe consumes all CPU and RAM resources

Consider a Windows 7 x64 installation with 2 printers installed. The system has 8GB installed RAM. One printer is a Brother laser MFC-8220 Printer via TCP/IP, and the other is a CutePDF printer. ...
6
votes
5answers
10k views

ngen.exe is constantly using CPU

I recently installed Windows 7. This was a clean install (i.e. not an upgrade from another version of Windows), but I did install a bunch of other programs. All mainstream applications - nothing ...
6
votes
6answers
30k views

Is a CPU fan speed of 3590 RPMs normal?

Ant pointed me to SpeedFan in this stackoverflow question. I downloaded SpeedFan and it reports that my CPU temperature peaks at about 73C which seems to be normal according to this chart (although ...
6
votes
5answers
11k views

How can I investigate 99% CPU usage by w3wp.exe?

w3wp.exe is showing 99% CPU usage. What are the best ways to investigate the cause of this high CPU usage?
6
votes
4answers
2k views

why does Virtualbox use 15-20% CPU when VM is paused?

I run VirtualBox 3.1 on Ubuntu with a Win XP guest. I have noticed to my surprise that when I pause the VM (its screen grays out) VirtualBox continues using 15-20% of the host's CPU. Is this normal ...
6
votes
3answers
3k views

CPU usage goes up while computer enters into screensaver/screen goes dark

Computer/Laptop: Lenovo T500 When I leave my PC, it turns off the display after X minutes. That's fine. However, since I use "Proccess Explorer" (SysInternals) there is a bit of a history in my ...
6
votes
3answers
5k views

How to get I/O usage by process in Unix? [duplicate]

Possible Duplicate: Linux: Is there something similar to "top" for I/O? I am trying to do some CPU intensive operation on a Linux machine and it is showing very high load. I want ...
6
votes
1answer
2k views

Windows 8 Release Preview - Extremely High Idle CPU Usage

Using Windows 8 RP, my computer is sustaining a 26.6% CPU usage while sitting at the desktop doing absolutely nothing. The other day it was over 50%. The entire usage is due to a process called ...
5
votes
4answers
18k views

SvcHost is taking 100% of CPU. It appears to be either DcomLaunch or TermService - virus?

So my SvcHost is all of a sudden taking 100% of my CPU, and I'd like to figure out which service is responsible for this. Is there any way to differentiate the load being generated by the multiple ...
5
votes
3answers
13k views

How can I monitor the CPU usage of one process over a period of time?

I want to know what the average CPU usage is of a particular executable on my PC over a day. I could write a C# app to do this, but I figured this is exactly the sort of app Superuser would know ...
5
votes
8answers
9k 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 ...
5
votes
4answers
3k views

CPU makes an electric leak like sound

For a while my computer have been making a electric leak like sound whenever the CPU usage gets high. However, lately it started to make it more often. For example with anti-virus searches and malware ...
5
votes
1answer
987 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 ...
5
votes
2answers
14k views

Windows 7 CPU usage high for Explorer.exe and DWM.exe

I'm using Windows 7 Ultimate. I get a problem with two processes: explorer.exe and sometimes dwm.exe. The two processes tend to have a CPU usage between 20-30%. It only occurs when I play games on my ...
5
votes
4answers
2k views

100% Finder CPU usage

Randomly, I wasn't doing anything specific — my system starts getting sluggish. I check the activity viewer — wow, Finder is at 150% CPU! This is what I have tried so far: Trashing ...
5
votes
1answer
2k views

System (ACPI.sys) is always using about 15-20% of my CPU

I have a 13" Sony Vaio laptop (model SVS13A1C5E) and I upgraded it to Windows 8 with a fresh install, after upgrading I installed Win8 drivers listed here. Now I have a problem with the CPU usage (it ...
5
votes
2answers
3k views

svchost consuming more than 50% CPU all the time in windows 7

I'm using windows 7 ultimate. svchost containing DCOM Server Process Launcher Plug and Play Power services is consuming more than 50% of CPU for most of the time. I found this blog post: ...
5
votes
1answer
9k views

What is the impact of running the CPU at 100% for long periods at a time? [duplicate]

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 ...
5
votes
0answers
1k views

Windows 8 Consumer Preview - Full Core CPU Utilization by system process [closed]

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 ...
4
votes
2answers
1k views

How do I see the CPU load of a server?

What is the command to see CPU load of a RedHat Linux server?
4
votes
2answers
2k views

Force specific CPU core usage in programs on Windows 7

Is there any way to force a program to run on cpu1 rather than cpu0 given that I know that there are at least two cores? I'm compiling C++ with code::blocks on Windows 7 x64
4
votes
5answers
9k views

Reduce Mac OS X's Flash CPU usage

I have been experiencing high CPU usage (138%) on my MacBook, while looking at flash videos on the internet with the Firefox browser. Mostly this usage makes itself noticeable by the loud noise of the ...
4
votes
1answer
2k 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 ...
4
votes
3answers
1k views

How can computer clouds charge me for CPU usage?

I’m considering moving my blog to either MS Azure or Google App Engine, using either an ASP.NET or Python blogging engine, but I can’t understand how they will charge me for CPU usage. The bandwidth ...
4
votes
2answers
530 views

Why is Kaspersky's CPU activity not shown in process list?

So, when Kaspersky Internet Security 2011 (11) starts doing a full scan, I can see my CPU activity going to 100%. However, the KIS process only takes 02% according to Task manager, how is this ...
4
votes
3answers
2k views

Mysterious cpu usage

A few times a day my CPU will jump to 99% usage, and it will stay there until I force a shutdown (via unplugging it). Below is a snap of the task manager during this time. I am certain a virus is not ...