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

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1answer
20 views

Windows 10 System and compressed memory & System interrupt processes using almost 100% CPU time

So a friend of mine has a problem with his PC and Windows 10. The "System and compressed memory" and "System interrupt" processes are using almost 100% CPU time for no reason, even when the system is ...
6
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2answers
6k views

High CPU usage by dwm.exe when nothing is happening

Setup: Windows 7 Ultimate, running in a VMware box inside Windows 8, VMware Tools installed; VMware Workstation is the only application launched in win8). Aero is on. Starting a few months ago, on ...
3
votes
2answers
8k 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 ...
9
votes
1answer
690 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 ...
3
votes
4answers
3k 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... ...
1
vote
1answer
31 views

Understanding cpu usage

I have this simple code int main() { while (1){} return 0; } When I run this code on Windows, why is my cpu usage only 25%? Yet, when I run it on Linux, my cpu usage is 100% I have 4 cores ...
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votes
2answers
6k views

Windows 8 not using max CPU speed on heavy operations

On my Windows 8 laptop, whenever I'm doing video transcoding with Handbrake, it seems to limit the CPU usage to 44% and the CPU frequency to 42% or 43% of max allowed. That probably means the CPU ...
1
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2answers
795 views

Windows 8.1 and Android Lollipop USB Tethering strange behavior

I have a problem under Windows 8.1 when I try to use internet through an Android USB Tethering... I have a nexus 5 and when I enabled the USB Tethering, it works fine (I can navigate and use ...
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3answers
4k 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 ...
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0answers
25 views

How to modify/re-position GUI element in taskmgr Windows 7?

For instance, Windows 7 x64 SP1. Is there any workaround or trick/tip (with resource editing tool, ect...) doing the reposition the number of graph in CPU usage history panel in Performance tab of ...
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0answers
18 views

How to get statistics of CPU throttling?

My dmesg output says that the CPUs are throttled, because of the temperature. [ 1283.260276] CPU3: Core temperature above threshold, cpu clock throttled (total events = 1) [ 1283.260277] CPU2: Core ...
38
votes
3answers
36k 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 ...
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votes
2answers
3k 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 ...
0
votes
1answer
2k 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 ...
0
votes
0answers
71 views

Ubuntu 14.04 - CPU load 100 percent

I haven't run/install anything since about a week ago, but yesterday when i logged on my laptop, and feel anything are slowly. So i checked CPU use with htop, everything went down. Some process use ...
0
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2answers
244 views

SVCHOST.EXE Using 25% Of CPU Load When Windows Update Is Running [duplicate]

Usually Windows Update does not take that much time to check what updates are available but this time I noticed that it took over 1 hour for it to check and return with information what updates it ...
0
votes
1answer
134 views

Windows 10, getting stuck and unbelievable CPU usage

I've just installed windows 10 and immediately experiencing lags and unresponsiveness. System would get stuck for ~10 seconds randomly. I have no utility software running, or even installed. It is a ...
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2answers
221 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 ...
0
votes
1answer
58 views

Allow browser to use more cores

I wrote an algorithm with JavaScript. When I execute it in Google Chrome, it takes about 30min, which is quite long. When I open the task manager during the computation, I can see that Chrome takes ...
2
votes
1answer
121 views

Windows 10 does not see second CPU

I have Dell Precision T5400 workstation with two Intel Xeon x5450 (quad core) processors, and I installed Windows 10 Pro (updated from 8.1 Pro), and OS see just one processor. Device manager see 8 ...
0
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0answers
27 views

How to determine (in a given time span in the PAST) which were the top CPU-using processes?

Short question: How do I determine which were the top processes hogging the CPU (Windows 7 Home Premium quad-core laptop) in a period of time which started 15 minutes ago and ended 01 second ago ? ...
32
votes
4answers
97k 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 ...
0
votes
1answer
44 views

Video player high CPU usage

I need to play a video file with ffplay in fullscreen mode. The original file has 720x576 resolution, my display is at 1920x1080. When I launch ffplay as ffplay "filename.avi" and upscale it by ...
0
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0answers
45 views

Compiz consuming CPU on Ubuntu 15.10

My CPU seems to run "hot" all the time, and I noticed that it's compiz which is running at 100% all the time, sometimes on single core, sometimes on multiple cores. It may be related to multiple users ...
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vote
2answers
217 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 ...
0
votes
1answer
36 views

systemd: cpu usage of services

I'm running systemd 229-3 on an up-to-date Arch Linux installation. Lightdm is launched on startup, and starts my XFCE desktop environment. Furthermore, laptop-mode-tools is installed and run on ...
0
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0answers
91 views

Windows 10 running at 100% CPU usage even in safe mode

I have been trying to solve the issue with 100% CPU usage on Windows 10. I tried the following: Updated GPU and Intel drivers. Scanned the system for viruses with Malwarebytes, ESET Smart Security ...
0
votes
1answer
72 views

Having trouble with windows 10 task scheduler

I have recently upgraded my windows 8.1 to 10, And now each time I leave my laptop on its own after a few minutes the CPU and Disk usage both go really up due to scheduled tasks. I tried disabling ...
0
votes
1answer
58 views

How to understand CPU 100% overnight on Debian

I've a server with serval VM. Two of those (are the same replica) tonight had a spike in the usage of the CPU. They went both to 100% for 6 hours or so (we have Grpahite and we check the chart every ...
12
votes
4answers
6k 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 ...
0
votes
2answers
101 views

CPU throttling / parking under use

Seemingly randomly, CPU cores 2-7 will park and cores 0-1 will throttle to an idle clock despite current heavy usage of a browser, video editor, VM, etc. What is running does not seem to affect the ...
2
votes
3answers
958 views

Windows 10 keeps showing 100% of CPU usage no matter what

I'm having a curious issue in my Windows 10 Pro 64: the task manager keeps telling I'm using 100% of CPU no mather what: it's just there, fixed, doens't matter which are the consumptions of the listed ...
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vote
2answers
56 views

CPU Spiking When Computer Is Locked

Today I installed a new CPU cooler onto my desktop that actively monitors the CPU temps and will adjust the fan speeds as needed. It also alters an LED on the cooler based on the temps of the CPU. I ...
0
votes
1answer
210 views

Chrome's high CPU utilization when playing Youtube 1080p@60fps videos (x 3-4 compared to Edge for same codecs) + more dropped frames

When I play full-screen 1080p@60fps Youtube videos in Chrome (with MagicActions extension), my i5-4570T CPU hovers around 35-45%. Playing the same video in Edge takes up only 10% of CPU. Both use the ...
0
votes
0answers
172 views

High CPU usage by Service Host: Local System (Win10, 64-bit): ntoskrnl.exe!KeSynchronizeExecution + others

Here are screen-shots from Process Explorer which identifies ntoskrnl.exe!KeSynchronizeExecution as one of the ever-running processes: I don't know what to do with this info and cursory google ...
1
vote
1answer
51 views

Windows 8.1 high CPU usage

When I play audio/video files with my system, no matter what the media player is, the cpu usage goes easily high and it's due to something labeled as "System" in task manager, and when I track its ...
3
votes
1answer
2k views

Xorg is using 80% cpu usage

Xorg is constantly using about 80% cpu power, on a single core. And I have no idea how to get it normalised I'm running Linux Mint 10 on an HP Envy 17 laptop with an AMD/ATI card.
5
votes
1answer
605 views

How can the CPU speed exceed the max speed?

I was watching my CPU speed in the task manager when I noticed that sometimes the CPU speed exceeds the maximum speed. Actually, sometimes it goes up more than attached. How can this happen?
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votes
1answer
175 views

Windows 7 high CPU and HDD load

Constant Windows 7 high CPU and HDD load. Process Explorer shows following 2 svchost processes doing this: One of them contains following services: Another contains this services: Any way to ...
0
votes
0answers
16 views

CPU frequency scaling max frequency

I'm able to cap the frequency of my laptop to 800MHz, but I notice the cpu usage almost doubles. Are there any long term negative effects to not letting the cpu manage it's frequency dynamically? I ...
6
votes
6answers
17k 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 ...
1
vote
0answers
787 views

vmstat shows incorrect processor idle time

To begin with OS: IBM AIX #oslevel 5.3.0.0 lparstat #lparstat System configuration: type=Shared mode=Uncapped smt=On lcpu=12 mem=12288 psize=16 ent=3.00 %user %sys %wait %idle physc %entc ...
0
votes
1answer
183 views

Disabling CStates/TurboMode in Windows

In Linux I know how to boot and have cstates disabled to get full CPU power. How is this done in Windows? Does it vary based on Intel and AMD?
2
votes
0answers
122 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 ...
2
votes
4answers
1k views

Cannot get rid of Win 10 'system and compressed memory' high CPU, any suggestion?

first post here, I have read all what I was able to find (and not only here) on the topic but nothing solved my case up to now, I have something like 30 years experience with PC building/servicing ...
3
votes
1answer
157 views

Suspicious CPU activity when computer wakes from sleep; VPN suspected?

Recently I noticed that upon waking from sleep, one or more of my CPU cores were running at full blast. My computer sleeps without fans on, so this is worrisome to say the least. I have experienced ...
14
votes
3answers
36k 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 ...
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votes
1answer
30 views

How can I monitor the CPU usage of each application

Sometimes I need to understand each application is running and consuming more CPU Resources than others and stop it. is there any Sw to monitor this?
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0answers
30 views

Linux top (procps) discrepancy in numbering of CPUs for process list vs summary

I am using the top utility on a CentOS 6.7 system (procps version 3.2.8) and am observing inconsistent numbering in its output. My box has an Intel(R) Xeon(R) CPU E5-2690 v2 which has 10 cores with ...
0
votes
0answers
28 views

Gaming framerate drop issue, and CPU temp display of 206 C

First and foremost, thank you to anyone who helps me on my journey to diagnose my computer issue. It is MOST appreciated. Before I start, let me give a display of what exactly my computer is running: ...