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

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3
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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 ...
4
votes
2answers
3k views

Which graphical settings impact CPU usage?

When running a game on a CPU-bottlenecked PC, which graphics settings should be decreased to improve performance? In other words, which settings usually have impact on CPU usage (rather than GPU)?
0
votes
2answers
29 views

Can laptop slow down after ram upgrade?

I upgraded RAM on my old ThinkPad T400 from 4GB to 8GB. Is it possible that my laptop slow down because of additional RAM? It is quite old laptop. Specs: Intel Core2Duo P8600 2,4GHz SSD Samsung Evo ...
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... ...
0
votes
0answers
12 views

What is [migration/1] on Synology DSM6.0?

We have a constant high load (>95%) on the CPU of our Synology DS2413+. top reveals this: PID USER PR NI VIRT RES %CPU %MEM TIME+ S COMMAND 12 root rt 0 0.0m 0.0m 32....
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0answers
14 views

Overhead for using iostat, top, and iperf commands

I'm currently looking at the best ways to monitor and report system statistics. So far, the best plan seems to grab output from iostat, top, and iperf, roll all the data up into a json object, and ...
0
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0answers
29 views

ACPI.sys is consuming a lot of CPU. Windows 7

Yesterday i had a problem where my CPU usage was getting spikes between 10% and 80%. I found out that svchost.exe was consuming a large portion of that. Now my problem is with the system process. I ...
-1
votes
1answer
161 views

High CPU Usage, system and svchost [duplicate]

My pc has been experience lag ever since it came back from a fan upgrade. Now i noticed that my cpu usage spikes from 10% to 80% and back in seconds, i see that svchost.exe is consuming 25% and system ...
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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 ...
0
votes
0answers
9 views

VPS, cloud, dedicated servers: which type for scientific python processing (scipy, networkx) and API REST?

I am using a server 1GB ram machine server, 1 core processor (as a set up, the free tier instance on AWS) to serve API REST GET requests that occasionally compute sub-graphs and matrixes on demand ...
25
votes
4answers
46k 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 (...
6
votes
3answers
3k views

99% CPU on Win8.1, Can't find offending process

For the last several weeks my laptop is running at 99% CPU, and have been unable to find the offending process. Task manager shows 99%, with no one process using all the CPU, it cycles between ...
9
votes
1answer
752 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 ...
0
votes
1answer
14 views

How to reduce PowerShell CPU spikes

On a windows server 2008R2 (VM, only 1CPU), I'm noticing hefty CPU spikes, completely disabling signing in via RDP / freezing connected sessions. Logging shows the ESX CPU demand scratches 3000 points ...
2
votes
3answers
1k 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 ...
6
votes
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 ...
0
votes
1answer
61 views

CPU Utilization in Task Manager

I have a question about the graph of CPU utilization in the Task Manager's performance tab. What does, for example, 25% 1.8 GHz mean? What is the scaling for the percentage? If there is a thermal ...
1
vote
2answers
94 views

How to reduce Google Chrome's CPU usage spikes?

I use Google Chrome on Windows 7 SP1 x64 Ultimate with a decently fast laptop (4-core i7-3610QM, 16GB RAM, 1TB SSD). I noticed that after starting Google Chrome, it has some clear CPU usage spikes, ...
1
vote
1answer
79 views

Task manager shows high CPU but 'user' shows differently

I've been having a recent problem lately with my CPU usage. It's literally always around 90%-100% but in task manager under 'user' it says differently. Even when I do a rough calculation of the ...
45
votes
4answers
137k 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
0answers
39 views

How to solve “system and compressed memory” taking 50% of the CPU? [duplicate]

Recently I connected a second hard drive to my laptop. After that system and compressed memory started eating 50% of the CPU. I removed new hard drive and it became normal. How to solve this issue?
2
votes
2answers
390 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
50 views

System process using CPU while lid is closed

I'm running Windows 8.1 on my laptop, and it is set to do nothing when the lid is closed. However, I often notice that the fan gets very loud, and when I open the laptop I can see CPU usage suddenly ...
1
vote
1answer
15 views

Performance with multiple instances of rsync across different direct-attached storage devices?

Would running multiple instances of rsync with all the sources and destinations on different direct-attached storage devices cause any performance hits, or would the speed limits for each individual ...
1
vote
1answer
56 views

CPU usage pegged at 100% on windows vista [duplicate]

According to Task Manager the CPU Usage is 100% but when I click on the "Processes" and sort by CPU in descending order I see that the process using the most CPU is taskmgr.exe at 02%. All the others ...
0
votes
2answers
251 views

Windows 7, left alone for 5 mins and system pushes cpu to 20% until i press a key or move mouse

I have scanned with avast a few times for virus's but nothing has been found, however.. every time i leave my computer for about 5 minutes the process labelled 'system' which is the 'ntoskrnl.exe' ...
0
votes
0answers
22 views

Linux cpu usages high but clock speed is low

I am running a game server (ark survival if it matters) on Ubuntu Linux 14.04 and when the number of users connected increases the CPU usages also increases, which is as expected. But the clock speed ...
7
votes
3answers
22k 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 ...
86
votes
7answers
42k 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 ...
0
votes
0answers
52 views

Inactive Firefox uses too much CPU (10% .. 30%)

On Ubuntu 14.04, I have a Firefox 46 with 30 tabs open. The Firefox window is minimized, I've been working with other programs in the last 3 hours. In top I can see that Firefox still uses between 10% ...
2
votes
4answers
2k 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 ...
1
vote
2answers
67 views

Assign an individual core to a process

What I'm trying to implement is to run a python script on it's own core on Raspberry Pi 2 with Debian. One can use taskset to bind a process to particular core. But I need this core to be free of OS's ...
1
vote
1answer
40 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 ...
2
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
vote
2answers
864 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 internet),...
1
vote
0answers
26 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
49 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 ...
41
votes
3answers
39k 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 ...
5
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
146 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
votes
2answers
394 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
204 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 ...
0
votes
2answers
596 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
92 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
316 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
32 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 ? ...
0
votes
1answer
54 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
votes
0answers
75 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 ...
0
votes
1answer
46 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 ...