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

learn more… | top users | synonyms

3
votes
2answers
2k views

Why does my System Process use 50% of CPU time?

The System process running on my Windows 7 installation uses almost 50% of CPU arbitrarily. I monitor the process with Process Explorer from Sysinternals. Click the images to enlarge them... ...
0
votes
2answers
51 views

CPU usage 99% constantly

My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well. The strange ...
0
votes
0answers
8 views

MacAfee On Access Scanner won't end Windows 8

My computer is operating quite slow, and after opening the task manager I have determined that Macafee on access scanner is occupying 65% of CPU load (sorry if this is not worded right). My computer ...
2
votes
2answers
5k 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 ...
0
votes
0answers
14 views

What can I do to investigate 50% CPU on Interrupts?

My PC suddenly became very slow. In my Process Explorer, I noticed that it consistently spends 50% of CPU in "Interrupts" process. I googled around and found that one possible solution is to go into ...
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 ...
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.
0
votes
0answers
24 views

avg consumes all cpu when github running

I am running a Windows 8.1 machine, on which I have installed Github for managing my repositories, and AVG antivirus. I noticed there is some kind of conflict between these two, as AVG consumes all ...
1
vote
1answer
42 views

When applications are slow to launch, how quickly is the process registered as running?

I'm looking at a problem with a java webstart kiosk app of ours. I occasinally get a support ticket saying that multiple instances of the app were found running at once on one PC. This causes problems ...
2
votes
4answers
4k views

Windows Defender high CPU when idle

I noticed on my MacBook Pro from 2011 with Windows 8 that the fans start spinning when I leave my laptop idle for a while. I figured that it is Windows Defender which seems to be running. Is it ...
3
votes
1answer
2k views

IPHLPSVC High CPU in Windows 8 x64

I was experiencing consistent high CPU usage in Windows 8 Pro x64. The cause was svchost running at a constant 25% CPU, even at idle. I checked the services that the svchost was running, and toggled ...
0
votes
1answer
2k views

Windows 8.1 high System process CPU usage due to MmTrimAllSystemPagableMemory, why?

Every once in a while (I can't pin down exactly when, but it seems to be correlated with when the computer is idle for a while), the System process on my Windows 8.1 x64 machine suddenly starts using ...
1
vote
1answer
39 views

Software to do specific CPU load test [closed]

For the purpose of testing my own script that reports CPU usage I'm looking for a program to put CPU under a certain workload, for instance: 10%, 20%, etc. up to 100%. Is there a program that can do ...
0
votes
3answers
51 views

Is there a Linux tool to measure simple stats of memory and processor usage for a program at runtime?

I am aware of for example the GNU profiler gprof, but I am thinking of something that can measure it on any program in a more black-box fashion where I do not have access to compiling the program ...
0
votes
1answer
206 views

How to disable CPU from entering IDLE States

This thread may be similar to Any way to disable specific CPU idle (Cx) states? I have USB 2.0 CMOS sensor camera that needs to be controlled VIA labview. However , when it captures images ...
1
vote
1answer
685 views

Task Manager: Overall cpu usage + idle process cpu usage > 100%

On Windows XP SP3, in Task Manager I assume that the "System Idle Process" is not counted as part of the overal "CPU Usage", therefore at any time the sum of both should be 100%, which seems to be ...
2
votes
1answer
147 views

Force a program to consume at most x% of CPU time [duplicate]

Is there a way to force a specific program to use less than 100% processor time even when the CPU would be idle otherwise? Using process priority, we can adjust how much resources a given program ...
4
votes
1answer
2k views

Why did my system suddenly start consuming 100% CPU all the time and how do I troubleshoot it?

Recently, my friend's PC came to a grinding halt. It was quite messy and the system was full of cruft so I decided to do a clean XP Professional install. The system is a Turion64-based HP laptop ...
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 ...
1
vote
1answer
294 views

High System process CPU usage (Queue/Dequeue+TrimAlllSystemPagableMemory)

I have ASUS G75VX laptop with latest Windows 8.1 (not Pro), all updates installed. Task manager says it's the System process that takes my entire single CPU. When this high single CPU saturation ...
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?
2
votes
0answers
301 views

Why is the kernel and the watchdogs consuming all the CPU?

I run a bunch of heavy user space processes on a powerful Xeon machine (32 virtual processors according to /proc/cpuinfo). The CPU load is normally around 30 and the machine feel responsive, but later ...
0
votes
1answer
258 views

pdf viewer / reader with multi-core support? [closed]

Which pdf reader/viewer supports more than one core to render and search through pdf files? evince does not okular does not Adobe Reader does not Xpdf crashes on all my tested pdf documents ...
2
votes
4answers
4k views

svchost.exe taking 25% cpu

For some time now I have been noticing that one of my svchost.exe was constantly taking 25% cpu time on my 4 core, Win7 Ultimate PC. This particular service host is hosting: Cryptographic Services ...
1
vote
0answers
118 views

Windows 8.1 - System process uses 1 core up to ~90% constantly

Asus N550JV comes with Windows 8 installed. I prefer 8.1 so I installed Windows 8.1 on my machine. Downloaded all the specified drivers on Asus Support Page, not to mention my whole system is up to ...
0
votes
3answers
70 views

How to give 100 percent CPU usage to a process

(windows 8.1 machine with i3) Is it possible to put a process using 100% of my CPU? I have a rather "slow poke" CPU and after a while working with an application, it gets really slow. I'm wondering ...
2
votes
2answers
1k views

High CPU load from System when idle

I run Windows 8 Pro 64bit on a ~3 year old Sony Vaio. Pretty much since I installed Windows 8 I get high CPU load when I leave the system alone for a couple of minutes. The high load will continue ...
33
votes
12answers
35k 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 ...
1
vote
0answers
25 views

minimum allowable CPU speed

How can I determine the minimum allowable speed for my CPU to run the computer. Having the option to reduce the CPU to 0 is not logic nor allowable in Win8. Even if you set the Max. processor ...
1
vote
2answers
854 views

System process consuming CPU in Vista; mostly in ntkrnlpa:KiDispatchInterrupt

I've been having some trouble with high CPU usage from my system process intermittently for quite a while (months). More recently, it is present all the time that Windows is running. Running with ...
2
votes
1answer
343 views

System idle process

When the cpu isn't doing anything, it runs the idle process. I heard that this process looks for programs that are waiting in the queue so that the cpu can run them. Is that all it does? I am also ...
4
votes
5answers
4k views

How to tell which process is hogging my CPU when they don't add up to 100%?

Ubuntu's System Monitor applet shows 100% CPU usage continuously. If I click it, the resources tab shows it at 100% continuously, too. If I go to processes, though, to find out which process is the ...
0
votes
0answers
33 views

efreetd keeps hogging cpu in enlightenment 17 (version 0.17.3-3)

SOLUTION AT THE BOTTOM Googling around led me to someone remarking that it posts a lot of 'sleep' messages in ~/.xsession-errors, which maybe the culprit. But I have no idea how to stop the ...
0
votes
1answer
2k views

Windows 8.1 Pro - CPU Usage Stays at 100%

About an hour ago, I noticed that my laptop had gotten noticeably slower. My laptop is extremely fast, so this extreme decrease in performance prompted me to look at the task manager. In the task ...
1
vote
1answer
180 views

Postfix is Sending Spam [closed]

I have an Ubuntu 12.04 server, hosted on AWS, that powers a dozen WordPress installations using Nginx and php5-fpm. The problem just began one day. My server was down. Panic! Whenever I turned it on ...
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 ...
0
votes
0answers
32 views

CPU utilization taking frequency scaling into account

The CPU utilization output in tools like top, obviously, simply measure the amount of time a process has spent running on the CPU, divided by the elapsed real time. Taking this as a measure of how ...
0
votes
1answer
74 views

Audio is distorted after playing game, “System interrupts” at 15% of CPU Usage

It doesn't happen before. Just yesterday, I played a game and I quit it. I was bored and listened to some music and then the audio is so bad that the quality had distortion. Not just the song, but all ...
0
votes
1answer
29 views

Load average and processor count

If I have a CPU with 8 cores, is it okay to have a consistent average load of 2.5? Or should it always remain below 1, irrespective of the number of processors / cores?
0
votes
1answer
19 views

Can't get cpu % usage from stats

I am using a tool called collectd, under linux, which gives me different cpu stats. I get: cpu user mode cpu system mode cpu nice cpu idle cpu wait cpu interrupt cpu softirq cpu steal now, ...
0
votes
2answers
91 views

Sometimes when I check my CPU usage, my 2nd CPU (#1) is stuck going around 90% while the others are around 20% max

i have checked the 'affinity' of all my processes and all of them are set to all CPUs, yet I check my CPU usage and my 2nd CPU (it's called #1 because my first CPU is #0) is jumping around 90% and ...
1
vote
1answer
140 views

Why does Touchegg's CPU usage increase over time?

I'm using Touchégg on Arch Linux and it functions splendidly. However, I'm noticing that as I use it, it gradually takes more and more CPU time. There are a few things to note: If I kill the ...
1
vote
1answer
63 views

Why is there a lot of CPU usage on mostly IO operation?

I have a process writing binary files into ext3 filesystem. I would assume that this should be a pretty easy process on CPU, but I see 45% system CPU utilization. It's a 40-cores 80-threads server, ...
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 ...
1
vote
0answers
45 views

How is CPU time measured on Windows?

I am currently creating a program which identifies processes which are hung/out-of-control, and using an entire CPU core. The program then terminates them, so the CPU usage can be kept under control. ...
2
votes
1answer
114 views

CPU time used last second

I'm programming in Bash and I'm trying to find out how much CPU time that were used in the last second. I also need to separate the systime (Kernel mode) and the usertime (User mode). I've looked ...
-1
votes
1answer
60 views

OS X only uses 99% of CPU while Windows uses 100%

On OS X Mavericks I noticed that while rendering or playing games, the maximum CPU usage is 99%. Trying the same render test on Windows on the same machine gets me 100% CPU usage. Why can't Mavericks ...
0
votes
0answers
79 views

Is a Dell XPS 15 L502x with three 24" monitors (1920 x 1200) possible?

I'm at a crossroads and need some PC advice. I'm a web developer so I'll have a few local web and DB servers running, maybe Photoshop and or Illustrator, any number of MS Office programs running, SQL ...
1
vote
3answers
869 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? ...
1
vote
0answers
59 views

30% CPU usage when charger unplugged. When plugged in, cpu usage drops to 2%

I have checked by external debugger and it seems that batteryservice:update start runs 10 times per second. Other battery processes are running very often too, only with charger unplugged. It's brand ...