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

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3k views

How can i fix my low CPU usage?

I have a very expensive pretty new computer, (Asus rampage III Extreme) (Intel i7 980x) and 2 (nvidia gforce 580 SLI). So it is a good computer, but when I play games like Borderlands 2 I get much ...
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0answers
75 views

Starting any process and suspending it lowers CPU from ~50% to ~5% in Vista, Why?

While doing a little housekeeping on a Windows Vista installation, I discovered that suspending any winlogon.exe subprocess would lower the CPU usage from the normally observed 50% usage down to ...
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0answers
115 views

Windows unresponsive, CPU utilization uninformative

In many situations my Windows 7 box becomes unresponsive, but the Task Manager shows 0 CPU utilization for all processes. Obviously it is the kernel/Windows itself that is sucking all the cycles and ...
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1answer
106 views

How to stress the Windows XP kernel?

We have intermittant problems with writing DVDs where the writing process fails. We suspect that the problem is happening when the DVD driver switches from DMA mode to PIO mode and then in this mode ...
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2answers
302 views

Reducing RAM and CPU usage on a specific manually selected process

I'm using a very nice desktop software for Gmail (and other email providers): Mailbird. But it consumes too much RAM and CPU, so I have to close it sometimes. I'd like to know if there is any ...
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1answer
479 views

Is using top a robust way of measuring system CPU usage?

I got confused while reading this question on stack overflow. The asker says: "'top' will simply not do, as there is a delay between cpu dumps, it requires 2 dumps and several seconds, which hangs ...
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1answer
4k 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 ...
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1answer
465 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 ...
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1answer
575 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 ...
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1answer
72 views

VBA CPU usage during debug

Is there a reason why CPU usage will jump when debugging in Word VBA? I noticed that even when I "step into" a project, and nothing is actually being calculated except waiting for me to step to the ...
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1k views

Constant CPU usage from services.exe, restarting a particular service fixes it, why?

I've always noticed steady usage of my CPU from 'services.exe', typically from 1-4%, constantly throughout the day. If I enable the CPU Time column and sort the processes, I can see that over time ...
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1answer
895 views

Why USB 3.0 ports are causing high CPU usage?

After two weeks of research and a lot of thinking, it looks like my problem (Explorer is very slow after connecting external HDD) is caused by USB 3.0 ports. In short: after working around one hour ...
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2answers
2k 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 ...
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1answer
1k views

windows CPU is at 100%, why is my CPU frequency down?

I'm looking at Resmon on Windows 8 Basic. I have chosed the "high performance" power plan, which I thought would keep my CPU at the highest levels possible. When the machine is (mostly) idle, the ...
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1answer
770 views

Allocating more CPU usage to MATLAB

I was wondering if there was a way to allocate more CPU usage to MATLAB. Currently, it says that 85% of my CPU is is idle. Is there some way to increase the threads MATLAB uses, or something along ...
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1answer
410 views

Get cpu temps from terminal using Cygwin?

I am using Cygwin 64 on Windows 8 and would like to use the bash interface to get cpu temperatures (4 cores, as well as gpu temps). Is this possible? I am using the temperature monitor application and ...
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3answers
1k views

Hard drive dying? One CPU core runs at 50% but System Idle Process at 99%

I think I have a hard drive or video card dying in my HTPC. It's a dual core CPU and one processor is almost always at 100% usage, but processes are all nil, System Idle Process is at 99% It's a ...
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1answer
179 views

Can I run a Pentium 4 on 100% for an extended amount of time?

I want to use my Pentium 4 desktop for running some heavy simulations. These simulations take from two to eight hours. Is it safe to run the CPU at 100% for such a long time?
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190 views

Sudden drop in CPU - unclear root cause

Trying to diagnose why my computer suddenly comes to a CPU standstill (somehow related to plugging in the computer to power packs / recharging). One thing that has prevented me from diagnosing the ...
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3answers
187 views

CPU usage and its utilization [closed]

When we use _task_manager_ in windows or top in Linux, we could see that the cpu usage is usually not very high. Moreover, developers are also doing their best to let this target come down. Actually, ...
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1answer
155 views

How to read 'top' results

I am running a software and while it is running, I want to know how much CPU usage or RAM it occupies... along with maybe other things that could be interesting. For that purpose, I need to know ...
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3answers
7k 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 ...
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1answer
404 views

Monitoring CPU usage of Virtualbox with top

I'm using the top command in Linux to keep a close eye on Virtualbox which is running a VM. The current CPU in the server is a Quad Core Xeon processor 3.3 Ghz and I have only assigned one core to ...
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1answer
295 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 ...
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1answer
109 views

Can someone explain what causes extra heat in a CPU

I have a hardware question about CPU and chips in general: what is causing the extra heat when CPUs are busy doing computations ? I thought that the CPUs would have a way to throttle themselves when ...
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1answer
2k 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 ...
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1answer
221 views

Why does my CPU go to 800% on a quad core processor?

I have a recent Macbook Pro. My processor is a: 2.4 GHz (i7-3630QM) quad-core Intel Core i7 Ivy Bridge with 6 MB on-chip L3 cache I am running some cpu intensive programs, that each use "100%" of the ...
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3answers
4k 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 ...
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1answer
207 views

Linux Load Average with CPU 1x2GHz

My load average shows 2.0 in 5 and 15 mins. My CPU is 1x2GHz, I know that 1.0 = 100% but what about GHz? Does it affect that?
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0answers
454 views

Pulseaudio high CPU usage

Is it normal that the pulseaudio process has sometimes a CPU usage of ~40%, even without playing audio? The process seems to run in realtime-priority, is that the cause of the problem? Update: I ...
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1answer
147 views

redirect awk information to stdout

I am trying to gather information for CPU use for all the processors in a text file. mpstat -P ALL -u 1 | awk '{print $4}' > cpu.txt && mptat -P ALL -u 1 | awk '{print $4}' | tee cpu.txt ...
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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 ...
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2answers
56 views

Is High CPU Usage Dangerous For My Computer?

When I play Publishing Clearing House Slots, eventually Norton advises me that my CPU usage is running high. I know nothing about computer temperatures; am I at risk for damaging my computer?
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1answer
380 views

How to identify what is causing sys% in top?

top on one of hex cores with hyper threading shows the following Cpu0 : 2.3%us, 58.8%sy, 0.0%ni, 38.2%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 4.7%us, 62.1%sy, 0.0%ni, 31.2%id, 0.7%wa, ...
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5answers
718 views

Negative impacts of using high CPU And memory for a few seconds?

I built a crawler for my own personal use that queries many pages with curl_multi_exec. It uses 98% CPU and memory for 10 seconds on my laptop. I'm only crawling around a 1000 pages, but I wanted to ...
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3answers
596 views

How do I find out I have a high cpu activity on my macbook air, before my battery is used up?

I have a Macbook Air. Occasionally the battery runs down very quickly and it's caused by a high cpu process. My problem is I don't know this is happening - there's no loud fan noise, just a quicker ...
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0answers
266 views

Why is AppleIntelCPUPowerManagement devouring my CPU?

Once in a while, for not apparent reason my Macbook Pro (OS X 10.7.5, late 2011 model) will ramp up to 65%+ CPU usage by "System", and stay there for upwards of an hour. If left long enough, the ...
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2answers
4k 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 ...
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2answers
4k 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 ...
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2answers
361 views

CPU hitting 100% when flash or game is running after dropping laptop

I have a quad core Lenovo with 8GB memory running windows 7 x64 with NVidia quadro 880 Everything was working great until one day I would be playing a game and the CPU would max out for a few ...
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2answers
2k views

AcroRd32.exe Maxes Out Core

My CPU usage hit 100%. Process Explorer shows two instances of AcroRd32.exe. Each one is maxing out 1 core. But, there is no Adobe/Acrobat Reader window showing. I had closed the windows earlier. ...
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1answer
448 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?
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1answer
786 views

CPU usage doesn't add up

My computer has been acting a little wonky today (it's been running a little slow), so I decided to open up the task manager to look at CPU usage. Why does the top CPU usage not add up to the total ...
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2answers
113 views

CPU usage and speed of program

This is for my server. The scenario goes as follows: Computer A has a faster processor than computer B. They both execute the same program, but Computer A's CPU usage only goes up to 30% while ...
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1answer
10k 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 ...
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1answer
663 views

Task/Services has high CPU, but how to find out what it is doing?

nearly daily some service is starting a task and never finishs. This task uses an entiry cpu core, which results in high fan activity. Using ProcessExplorer I found out that it might be a service ...
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0answers
209 views

CPU usage according to lxde applet and task manager is different than top

The CPU usage in top (htop) appears normal but the task manager and lxde CPU applet don't. Here is a screenshot: This is Lubuntu 12.04 Is this a bug?
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0answers
181 views

Decompiled DSDT table, looking for fan values, can't locate. table inside

I have the suspicion that my laptop doesn't set it's fan speed to 100% even when the CPU is hot. This is because I can barely hear the fan when the CPU is > 95 degrees or so. So i'm trying to check ...
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1answer
132 views

Max CPU on everything

I just reinstalled windows 7 ultimate 32 bit on my desktop PC, and it seems like every program I try to run maxes one of my CPUs! its ridiculous! Every time I load a web page in any browser it maxes a ...
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1answer
2k views

Opera - How to make it run faster?

I'm using Opera version 12.13 under Windows XP home. It needs ~50% of my CPU and it takes a few seconds if open or close a tab. How can I make it run faster and if possible with less CPU usage? I ...