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

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17
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2answers
4k 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 ...
15
votes
12answers
118k 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 ...
18
votes
2answers
50k views

Troubleshoot 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
16k 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
5answers
12k views

CPU usage at 100% for several hours

If I use a processor at 100% constantly for several hours, can that damage the machine?
11
votes
1answer
22k views

How does windows “limit” the CPU (Power Options / Battery saving)

Can anyone explain how Windows effectively limits the CPU? Last time I tried some tricks to let my laptop not overheat, so I tried limiting the CPU to 70%. As for my suprise it stopped my laptop ...
70
votes
6answers
36k views

Determine which tab in Firefox is using CPU resources?

Is there anything in the current Firefox similar to shift-esc in Google Chrome? There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with multiple windows, each ...
7
votes
1answer
23k 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 ...
1
vote
1answer
7k views

Program that logs the CPU usage in Windows 7 [duplicate]

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.
5
votes
4answers
5k 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 ...
3
votes
7answers
10k views

How to fix the “Firefox using max CPU” problem?

Every now and then while browsing, my Firefox CPU usage shoots up to the max possible (that's 50% for my dual processor laptop). It remains at max usage even when I close all the tabs. In fact, the ...
1
vote
2answers
2k views

Media player classic starts at boot up CPU 100% not listed in msconfig. What is going on?

Every time I boot windows, media player classic starts running in the background (no actual MPC window opens) and hogs the CPU at 100% until I kill it. In process explorer the parent is explorer. I ...
53
votes
13answers
72k 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 ...
53
votes
4answers
41k 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 ...
3
votes
1answer
2k views

What does CPU usage for a process actually mean

Assume the computer has a single core - what exactly does it mean for process A to be running at 100% CPU capacity vs (lets say) 10% CPU capacity. If the CPU was 2.0 GHz, does that mean in a time ...
13
votes
2answers
27k 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.
6
votes
2answers
9k 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 ...
4
votes
2answers
6k views

How to deal with a misbehaving dllhost.exe?

In the last few days, I've been having persistent problems by... something that causes a dllhost.exe process to spawn and consume minutes and minutes of CPU time. Procexp says: While fascintating, ...
2
votes
1answer
326 views

CPU usage and frequency as a tray icon

I'd like to display a CPU usage / frequency graph like the Resource Monitor does: in a tray icon like Process Explorer does: In particular, I'd like to see that blue line indicating the ...
5
votes
8answers
19k 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 ...
4
votes
2answers
2k views

How do I see the CPU load of a server?

What is the command to see CPU load of a RedHat Linux server?
3
votes
3answers
2k views

cpu usage nearly 100 constantly windows xp sp3

When running some heavy applications like games or virtual box for some time.. the cpu usage is normal for some 15 mins and then suddently cpu usage increases. even after i quit the heavy apps and ...
2
votes
3answers
14k views

Why does my CPU Usage reach 100% too often?

I'm using a dual-core processor and often see my CPU usage reaches 100%. I realize this may happen if I'm running too much applications, so when I know the computer starts to run slowly, I start to ...
2
votes
3answers
6k views

What's more harmful to a CPU? High load or high temperature? [duplicate]

Possible Duplicate: CPU usage at 100% for several hours Is it ok to have 100% CPU usage constantly I wonder which case is more harmful: high percentage of usage (>90%) vs high temperature ...
1
vote
1answer
720 views

Will a CPU upgrade speed up my web browsing? How to tell?

My CPU model is 2 and a half years old now, released Intel Q4'2010. How can I determine if getting a new CPU will improve how fast I surf the Internet, versus getting a better ISP subscription?
0
votes
3answers
1k views

Make Sleep/Hibernate Timer depend on CPU-user / download? [closed]

I am usually letting my (Lenovo, Win 7 Ultimate x64) laptop go to sleep after 15 mins, which is just perfect for me. With one exception: Is there a tool or other tweak, that would prevent going to ...
0
votes
1answer
1k views

disparity between `top`'s given CPU % and process CPU usage total

I've noticed that there are sometimes (large) differences between the reported total CPU usage and a summation of the per-process CPU utilization given by apps like top and wmtop. As an example: I ...
0
votes
4answers
787 views

XP 100% CPU on Login, by random processes

I have a serious issue on my Windexs XP machine. When I start it up it takes ages to login, then when I bring up task manager I find that its running at 100% CPU However, the process taking the CU ...
11
votes
3answers
9k 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 ...
22
votes
2answers
33k 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 ...
29
votes
3answers
31k 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 ...
10
votes
4answers
3k 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 ...
8
votes
3answers
20k 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 ...
7
votes
4answers
3k 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 ...
5
votes
2answers
8k views

What is the cause of a high CPU usage of 'system and compressed memory' in Windows 10?

There is an observation to be made for Windows 10 on my laptop running with 24G memory available, and 2.5G used. There is no 'memory pressure'. Other questions have looked at memory consumption ...
4
votes
3answers
12k views

QuickLookSatellite MAC OS, High CPU Use

I have consistently been having a problem with my computer overheating due to the process QuickLookSatellite-general using 100+ CPU use. (Please see images attached.) On googling I found this ...
5
votes
5answers
10k 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 ...
1
vote
1answer
8k views

explorer.exe hogging CPU, slow folder browsing

My computer is snappy when I log in from a fresh reboot. Within a short while, it becomes almost unusably slow depending on what I want to do. In particular, any Windows-y actions are slow while ...
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
4answers
10k views

Writing a CPU/RAM usage log over a period of time to file on CentOS

I'm looking for an application or line of code that would let me observe a process, save the info in a number of variables, then put the gathered info on a file. I've been trying with variations of ...
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: ...
4
votes
5answers
2k views

What is Firefox doing?

If one watches Firefox's CPU consumption, one can see it consuming large amounts of CPU even while it's not being interacted with. On lower-spec computers, this can cause performance problems that ...
3
votes
1answer
6k views

Root cause for high CPU usage; which measurement to trust more: Windows Task Manager or Process Explorer?

Consider this Windows 8.1 machine (in-place upgrade from Windows 8) with differing reports on its CPU usage. The machine is idle, and has been for 3 days. There are no CPU intensive tasks running ...
3
votes
3answers
5k views

Windows 8 Task Manager: how to enable the “CPU Time” column in the Processes tab?

Up until Windows 7, the Processes Tab of the Task Manager would allow you to add the CPU Time column (see for instance Task Manager's possibilities you may not know): to show it, choose theView ...
2
votes
2answers
778 views

Power to USB lost when computer is under load

Any time my computer uses 50+% of its CPU for more than a few minutes, the power to my USB ports seems to be shut off, and then the CPU spikes to 100% and stays there. (syncing my iPhone is what was ...
1
vote
1answer
1k views

Intel 3945ABG DPC spikes (audio stutter, mouse) in Windows 8.1

As reported by many users, Intel WiFi chips such as 3945ABG and the later 4965 may experience CPU spikes due to DPC activity. This is typically experienced as: Audio stuttering. Uninterrupted ...
1
vote
2answers
6k views

Shell script that monitors CPU usage and terminates services with high CPU utilisation

We have a Windows 2003 server where 3 services are running constantly. Sometimes these services consume over 90% CPU. Restarting these services returns normalcy. I need a script/program that will ...
6
votes
3answers
6k 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 ...
3
votes
2answers
5k views

Intel Core i5-2467m - Turbo Boost not activating?

I have a Samsung Series 5 laptop with an Intel Core i5-2467m process @ 1.6Ghz. The processor supports Intel Turbo Boost up to 2.30 Ghz according to the specifications. The i5-2467m is a dual-core ...
3
votes
5answers
939 views

Why are my computer graphics twice as fast after I doubled my computer's ram?

I doubled my computer's RAM from 2 GB to 4 GB of 800 MHz DDR. Why would it make Windows 7 desktop animations twice as fast (2x) and all games twice as fast and unplayable? Is there any way to add my ...