Questions tagged [cpu-usage]

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

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330 votes
12 answers
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Determine which tab in Firefox is using CPU resources?

Is there anything in the current Firefox similar to the Task Manager in Google Chrome? (Shift + Esc) There is something that occasionally takes up enough CPU to make Firefox unresponsive - but with ...
chris's user avatar
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226 votes
6 answers
669k 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 ...
Scott's user avatar
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113 votes
3 answers
81k 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 ...
kubi's user avatar
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94 votes
9 answers
30k views

Can a 7 days full 100% CPU load "burn-in" / "stress test" damage a modern notebook? [duplicate]

When I buy new computers, I usually do a "burn-in" with 100% CPU load for, say, seven days, in a well ventilated place. This is to find out if the computer has problems before I invest time into ...
Tom Stevens's user avatar
91 votes
13 answers
256k 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 ...
Morgon's user avatar
  • 911
85 votes
4 answers
118k 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 ...
tony_sid's user avatar
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80 votes
4 answers
271k views

Windows Update doesn't work and consumes 100% of CPU (Win7 SP1) [duplicate]

I've observed a strange behaviour with Windows Update (Win7 SP1). The process svchost is consuming an entire core of my Virtual Machine (VirtualBox) doing nothing (i.e., there is no network traffic ...
cantoni's user avatar
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75 votes
4 answers
67k views

What does load average mean on 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 average ...
John Fouhy's user avatar
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64 votes
5 answers
40k views

Chrome 100% CPU usage, again - software_reporter_tool.exe

software_reporter_tool.exe belonging to Chrome running at 100% cpu, fan full speed. Deleting it doesn't fix anything, because it gets redownloaded again! Disabling "Protect me from bla bla" doesn't ...
waaaaaat's user avatar
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61 votes
12 answers
58k views

Can I run my CPU at 100% usage for a long time?

I have a Dell XPS 15 9570, 32 GB ram, 2.2 ghz and 6 cores. When i use an application (The parsim command on MATLAB) (for more details) then my fan starts running fast , during this my PC doesn't seem ...
aadil095's user avatar
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48 votes
3 answers
98k 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 ...
Aaron's user avatar
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40 votes
4 answers
69k 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 (...
Raymond Burkholder's user avatar
32 votes
3 answers
90k views

Is there a command in Linux 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.
kumar's user avatar
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29 votes
5 answers
89k views

Task Manager shows higher total CPU usage than the sum of all running processes. Hidden process?

In Windows Task Manager and AVG Task Manager (included in TuneUp Utilities), I see that the sum of all the running processes is much lower than the total CPU usage shown in "performance" tab. Does ...
tensojka's user avatar
  • 415
28 votes
7 answers
105k views

CPU Constantly at 100% In Task Manager, But Not in Process Explorer

Starting yesterday, I have a very odd problem on my Windows 10 desktop-- my CPU is constantly running at 100% (according to Task Manager), and it isn't throttling down. Because of this, it's ...
Andrew M's user avatar
  • 955
26 votes
6 answers
191k views

What is the relationship between CPU usage and RAM?

I have seen many times that the CPU usage is 100% and only 50% of the RAM is in use. What is the relationship between these two? How does one's performance affect the other?
Gopi's user avatar
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25 votes
3 answers
21k 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 ...
juanpablo's user avatar
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25 votes
2 answers
123k views

How to increase Python's CPU usage

I use Python to execute some algorithms and no matter which Python I use, and I have tried many versions, the CPU usage goes to 25% max. Why doesn't Python take advantage of the rest of my CPU ...
user avatar
25 votes
4 answers
52k views

How to find the cause for high CPU usage of gnome-shell?

I'm on a Linux Fedora 23 and I recently noticed that my gnome-shell process constantly uses 100% of one CPU (reported by htop, no visible applications running). There are some hints out there which ...
frans's user avatar
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24 votes
5 answers
11k 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 ...
triazotan's user avatar
  • 450
23 votes
8 answers
16k views

Is copying a lot of files bad for the CPU or computer in any way?

I'm using my laptop to copy a couple of harddrives to other harddrives. My laptop will probably be crunching through 20 TB of data... I'm wondering if this will affect my CPU long term in any way. And ...
Dave's user avatar
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23 votes
7 answers
58k views

Windows update KB2952664 (Compattelrunner.exe) cannot be uninstalled from Windows 7

Update KB2952664: Compatibility update for upgrading Windows 7 This update performs diagnostics on the Windows systems that participate in the Windows Customer Experience Improvement Program....
mins's user avatar
  • 989
23 votes
2 answers
13k 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 ...
kaivalya's user avatar
  • 233
23 votes
12 answers
135k 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 ...
Leonardo's user avatar
  • 251
22 votes
2 answers
23k 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 ...
dan_s's user avatar
  • 603
21 votes
1 answer
63k 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 ...
user avatar
20 votes
6 answers
16k views

ffmpeg: limiting to single CPU core when encoding h264

I need to reduce the framerate of some H.264 videos in the background without maxing out my CPU (on Linux). Somehow -threads 1 has no effect at all: ffmpeg -threads 1 -i 50fps.mp4 -filter:v fps=30 ...
kontextify's user avatar
20 votes
3 answers
5k views

How to diagnose abnormal CPU usage by svchost.exe? [duplicate]

I've got a laptop with a Win 7 32-bit system powered by a dual-core Pentium (it's a 2010 laptop). Sometimes it works fine, but usually it idles at 100% CPU load. The CPU is consumed by two svchost.exe ...
Violet Giraffe's user avatar
19 votes
2 answers
31k views

Mac OS X Activity Monitor - what does "CPU Time" tell me?

What does "CPU Time" tell me about the process? Is it the accumulated time the process has run? It sometimes jumps a few seconds and often nothing happens.
Andrew J. Brehm's user avatar
18 votes
3 answers
13k views

ngen.exe high cpu windows 10 - Assemblies Uninstall Endless Loop

Whenever I leave my computer idle for a few minutes I come back and my Process Explorer shows that 'ngen.exe' is running and occupying 2 of my 4 cpus. Question: Is there a way to turn NGEN.exe off ...
Viktor's user avatar
  • 285
17 votes
5 answers
79k views

CPU usage at 100% for several hours

If I use a processor at 100% constantly for several hours, can that damage the machine?
bzak's user avatar
  • 311
17 votes
1 answer
25k views

OneDriveSetup.exe causes high CPU usage

On my Toshiba Encore 8 Tablet I noticed that the CPU usage is very high. In Taskmgr / ProcessExplorer, I can see that OneDriveSetup.exe is hogging 1 CPU cores heavily for hours. How an I solve this ...
magicandre1981's user avatar
17 votes
1 answer
99k 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 CPU and ...
L84's user avatar
  • 3,871
16 votes
9 answers
22k 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 ...
jerwood's user avatar
  • 1,477
16 votes
3 answers
18k views

cpu load measure with hyperthreading on linux

How can I get the true usage of a multicore hyperthreading enabled cpu? For example lets consider a 2 core CPU, expressing 4 virtual cores. A single threaded workload would now show up as 100% in ...
dronus's user avatar
  • 1,908
15 votes
2 answers
17k views

Linux : Understanding load average and % CPU?

When I execute top command on my ubuntu system I see below results top - 07:58:58 up 1:21, 1 user, load average: 0.82, 0.73, 0.55 Tasks: 293 total, 1 running, 292 sleeping, 0 stopped, 0 ...
user3198603's user avatar
14 votes
2 answers
16k views

CompatTelRunner.exe is causing 100% CPU usage

Since my last Windows 10 Update, CompatTelRunner.exe is causing 100% CPU usage after Windows start. This results in not being able to use my computer for a long time. How can I fix this? Windows OS ...
user1580348's user avatar
  • 1,668
13 votes
5 answers
46k 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 ...
andrsnn's user avatar
  • 487
13 votes
2 answers
3k views

How to solve a very sluggish Windows 10 UI

Just recently my PC's performance has become dismal, I even got about 10 'pauses' in the editor while typing these two sentences. Now if I used Process Explorer, I can sort by CPU, memory, and IO, ...
ProfK's user avatar
  • 2,621
12 votes
3 answers
20k 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 ...
nathan's user avatar
  • 410
12 votes
4 answers
88k views

Command Line utility to see list of tasks CPU Usage, Memory, and execute

I want to log, every 10 minutes, list of all the apps in windows that now running, the CPU usage, and memory usage. I have many node.exe tasks, so I want to see the arguments of the task (for example:...
Aminadav Glickshtein's user avatar
12 votes
1 answer
8k 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 ...
Kristian Erik Tigersjäl's user avatar
12 votes
5 answers
9k 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 this:...
David Mackintosh's user avatar
12 votes
3 answers
15k views

High CPU usage by "System" and "System interrupts" (caused by ACPI.sys)

I have a laptop, which was running Windows 8.1 x64 without any problems. Now with Windows 10 x64 installed, Task Manager constantly shows unusual CPU usage by "System" and "System interrupts". To ...
Brane's user avatar
  • 569
12 votes
2 answers
22k 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 @ 1....
CompilingCyborg's user avatar
12 votes
2 answers
54k views

TrustedInstaller.exe is eating all CPU; 100%

I have bought an ASUS ux50v for my wife (so pleeeeeaaaase help!), it has a single core cpu and Windows 7 Home Premium installed. I have updated it's os (made a mistake?) and now this TrustedInstaller....
Kaveh Shahbazian's user avatar
11 votes
8 answers
30k 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 wacky....
teedyay's user avatar
  • 328
11 votes
2 answers
164k views

svchost.exe using lots of memory slowing my PC down [duplicate]

On my Windows 7 32-bit. svchost.exe is using lots of Memory and slowing my PC down big time. I already have auto update turned off and it is on manual mode. How can I fix this problem? Thanks
user206168's user avatar
11 votes
1 answer
4k views

Does a CPU clock frequency vary on-demand?

On my machine (not a personal computer), I have 4 cores (2.4GHz) and I currently don't have any important process running. Right now, are all of my 4 cores running/vibrating at 2.4GHz or are some of ...
Remi.b's user avatar
  • 2,641
11 votes
3 answers
12k views

After Windows 10 Fall Creators Update, a svchost.exe instance is constantly using CPU time

Since installing the Windows 10 Fall Creators Update, I have a svchost.exe process that is constantly using about 14​ % of CPU time: This svchost.exe instance is responsible for hosting three ...
fefrei's user avatar
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