A multi-core CPU is a kind of CPU that has two or more actual chips inside it (known as cores). This allows a computer to actually be processing multiple things at once and is often seen as the solution to continuing Moore's law.

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How do the cores in an AMD Bulldozer module compare to Intel HTT virtual cores and two separate cores, in terms of multitasking performance?

This question is basically an extension of Hyper-Threading and Dual-Core, What's the Difference? The Bulldozer-based AMD FX processors are marketed as having four, six, or eight cores, but ...
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Does VMWare Fusion (5) use logical CPU cores before physical ones?

I have a Intel Core i7 quad core CPU in my Mac Book Pro. The processor supports hyperthreading, so I have 4 physical CPU core and 8 logical ones. Now, when I assign 4 CPU cores to a virtual machine ...
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Why is the “top” command showing a CPU usage of 799%?

I am running a process in a 4 core Ubuntu server. However, top command shows that the CPU usage is 799% all the time. How can this be possible? I know for multi core CPUs, more than 100% CPU usage ...
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407 views

Will multicore allow the same CPU usage as multi CPU [duplicate]

Possible Duplicate: Multi-core CPU: can I say I have a 3x2.1GHz=6.3GHz CPU? I plan to buy latop with with i5-2410M processor that have 2 cores (according to spec it can also have 4 ...
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Do multi-core CPUs still suffer from diminishing returns in today's world?

It has been shown in other questions that due to the state of computer applications, multi-core processors suffer from diminishing returns. Is this still the case in today's world? Do most new ...
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Terminology used for CPU/Processors

Suppose a system has 4 Intel Xeon processors each having 10 physical cores with HyperThreading enabled which makes a total of 80 cores Now it is completely confusing when in documentation they start ...
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2answers
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Why is my Dell Vostro 3500 overheating? The internal temperature is around 75 C

I felt that my Vostro laptop is overheating. I downloaded a tool named SpeedFan to test my internal laptop temperature. Speedfan gives the following measurements: Temp1: 75 C Core0: 70 c Core1: ...
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“Steal” cores to other users: reduce user's processes priority

I'm working on a shared linux machine with multicores where I do have admin rights. Is it possible to freeze all the processes of other users (or give them less priority to access to the CPUs) so that ...
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2answers
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What is the effect of booting with additional cores?

I was reading about ways to enhance speed in Windows 7, and I read that you can enable Windows to boot off of four cores vs one to boot faster. Is there a reason why you do not want to use all four ...
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4answers
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Multi-core CPU: can I say I have a 3x2.1GHz=6.3GHz CPU?

I have an AMD A6-3500 three-core CPU. AMD System Monitor shows each core with a maximum 2100 MHz. This also shows in AMD OverDrive. Does this processor run at the speed 3*2100 MHz? Edit Can I say ...
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1answer
934 views

Single-threaded program takes too low CPU?

I am using Windows 7 Professional, Intel i7 CPU. I know the i7 has Hyper-Threading and I assume this is the reason. While running a single-threaded program, I saw that it only uses 12-13% CPU in Task ...
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Have anybody tested R multicore packages on 10-core Xeon how do they scale in comparison with case of 4 core machine?

Have anybody tested R multicore packages (for example : parallel, multicore, snowfall, foreach) on 10-core Xeon ? How do they scale in comparison with case of 4 core machine ? What algorith have you ...
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1answer
748 views

Ubuntu not balancing cpu usage among cores, making load go up

I am running 10 processes that each use 20-70% of a core of an i7-920 with 8 cores on Ubuntu 11.04. CPU scaling is turned off. When I look at htop, I see that cores 4 and 8 are almost unused, while ...
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1answer
165 views

How are benchmarks for multiple cores calculated? [closed]

I found this site to compare CPU's. http://www.cpubenchmark.net/high_end_cpus.html What wasn't clear is how the benchmark for multiple core processors is calculated. If one CPU has 4 cores (such as ...
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704 views

Dynamically disabling cores in a power-efficient way?

I am looking for a mechanism to dynamically disable cores in Linux in order to minimize power consumption. Unfortunately, disabling cores using the following simple approach actually increases power, ...
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1answer
1k views

How can I tell my computer to use multiple cores for gaming? [duplicate]

Possible Duplicate: Force a single core program to use multi core Whenever I play games (specifically Minecraft) on my computer, only one of the cores is being used to run the game, which ...
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2answers
580 views

Finding the number of Cores on my CPU in GNU/Linux

When I do cat /proc/cpuinfo I get the folowing information printed below. Can I conclude from this information that there are 8 cores in my machine? I am interested in doing some parallel programming ...
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1answer
287 views

shared L2 in multicore: regarding miss per kilo instruction (MPKI) counting

I am using multicore simulator marss http://marss86.org. I am using 4-core simulation, with shared L2 cache. Each core is run for say, 100M instructions. Since different cores progress at different ...
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2answers
993 views

How do you get more cores?

Are you able to gain cores? I bought The Elder Scrolls V: Skyrim without looking at the specs. I need at least a dual core processor but I only have a single core processor.
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1answer
1k views

Windows BSOD when all cpu cores enabled

I'm getting a blue screen "A clock interrupt was not received on a secondary processor within the allocated time interval", just a few seconds after the Windows desktop is loaded. (For reference, ...
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1answer
886 views

How can I configure Visual Studio 2008, so that it uses multiple cores for compile?

I use Visual Studio 2008 on a bigger project. If some files get compiled, it compiles them one after the other. My computer has 8 cores, except one they are idle. How can I configure Visual Studio, ...
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1answer
357 views

Why does top report more than the theoretical maximum CPU usage of a machine?

I would like to know why I have a process being able to report a usage line like: PID COMMAND %CPU 248 Xcode 983.5 … in top on a quad core CPU? I understand it's wrong, but how come? I'm ...
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2answers
540 views

How does a multi core computer freeze (at the hardware level)

I have a 4 core i7 computer that freezes. The display stays, but nothing will ever move again. This question is not about getting help on that particular problem, but a general question about how a ...
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Should I prefer processor speed (GHz) or core count? [closed]

I'm currently in the market for a new computer, so I'm curious about the recent trends of processor speed versus core count. Core count seems to be 'all the rage' these days, but things are really ...
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1answer
209 views

What are “multikernel computers”?

Which does the term 'modern multikernel computers' refer to? Distributed systems or multi-core computers? I saw it in a one-line question, so no context to help! Google didn't help neither.
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Is Windows 7 better at utilizing multi-core processors than Windows xp?

Is Windows 7 better at utilizing multi-core processors than Windows xp? Better to have some explanation and proofs with the answer(yes or no).
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2answers
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Does adding core to multicore CPU mean increasing the transistor count? [closed]

I'm studying Moore's law. I'm curious why many people say Moore's law ends, so we switch to multicore CPU. From all materials I can find, I understand this by such logic: increasing clock rate -> ...
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1answer
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What are “hyperthreading” and “virtual cores”?

I'm new in this computer terms. So anyone can explain to me what "virtual cores" and "hyperthreading" are at greatest detail a layman can understand? People told me that virtual cores are imaginary ...
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209 views

Clock frequency, number of cores , threads

I'm really confused. What determines the speed of the CPU/processor? Some compared a dual core with 2.8ghz and a 2.4ghz quad-core and say the quadcore is better. But when it comes to a dual core ...
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5answers
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Why is my dual-core CPU recognized as a quad-core one?

My processor is an Intel Core i3-380m. As you can see, it's 2 cores and 4 threads. Although, both Ubuntu 11.04 and Windows 7 seem to think it's a quad-core CPU: Why is this? Is it because there ...
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5answers
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Is a higher core count or higher clock speed more beneficial to a computer's performance? [closed]

With lowering silicon costs and rising consumer needs, manufacturers seem to be pushing one of two things: clock speed and/or core count. With the way things are going, it doesn't seem that clock ...
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How to make commands in Mathematica 8 use all cores?

Many commands in Mathematica 8 (Integrate, Simplify, etc.) seem to only be using a single core on my system. Is there any way I can change the affinity so that it utilizes all cores for computations?
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Binding interface per core

I just wonder, is it possible (using Linux 2.6) to limit overhead done by ethernet interface to one specific core. Ie. I have core2duo CPU, and two ethernet interfaces: eth0 and eth1. Is it possible ...
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/proc/cpuinfo gives CPU info per core or per thread?

My CPU has 2 cores, so I can see two parts in /proc/cpuinfo. But, I want to know if CPUs that support Hyper-Threading (or similar tech), will /proc/cpuinfo give CPU info per core or per thread (or ...
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1answer
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What's a dual core? [duplicate]

Possible Duplicate: Can someone clear up the terms Core Duo CPU, Quad Core, Dual CPU, etc.? Does "core" mean CPU or memory or both? I'm thinking of buying a new computer. But ...
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How to limit a process to a single CPU core?

How do you limit a single process program run in a Windows environment to run only on a single CPU on a multi-core machine? Is it the same between a windowed program and a command line program? ...
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Interpreting CPU BenchMark for Multi Core Systems

What is the standard ways (if any) to interpret the results of cpu benchmarking for multicore systems relative to single core systems? I am trying to compare the Passmark result of AMD 64 Vs AMD ...
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633 views

Does using a hexacore CPU make sense?

I'm currently planning to upgrade my computer system and I want to exchange CPU, board and RAM. I already had a look at some hexacore-CPUs from AMD and would like to know if it makes any sense to use ...
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Controlling multiple screens from Ubuntu 10.04 with many cores

I'm running x64 Ubuntu 10.04, desktop edition. I've got 2 big graphics cards that handle 2 HDMI ports each. I've got 6 cores on processor as well. I want to be able to show a different movie on each ...
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Force a single core program to use multi core

The title says it all, is there a way to force a single cpu core designed program (older programs) to use multiple cpu cores?
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287 views

Mixing CPUs in a multi-CPU system

Mixing types of RAM is not always healthy, but I am curious as to what happens (if anything) when mixing CPU types in a system. Example: 8-Core 2.0Ghz Magny Cours CPU in socket 0 12-Core 2.0Ghz ...
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4answers
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Would my virus scanner be able to scan multiple files concurrently with dual CPU instead of multi-core?

Anti-virus: Microsoft Security Essentials OS : Windows 7 x64 Silly question perhaps, but somehow I was under the impression that multiple cores would mean the anti-virus scanner would be ...
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1answer
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Is Firefox 4 multi-core optimized?

I've been reading about Multi-Core support in Firefox. There are outdated https://wiki.mozilla.org/Electrolysis#Status Wiki pages. Which states "Firefox should be Multi-Core aware in 2 years", which ...
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1answer
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Oddity about declared multi-core CPU power?

I am having quite a hard time in understanding the output of cat /proc/cpuinfo on two 4-core Linux boxes here at work. Basically I am running algorithm experiments on the two machines (let's name them ...
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209 views

What exactly does the AMD Ontario C-50 APU have?

Does it come with two cores at 1 GHz plus a GPU, or is it just two cores and one of them is the GPU?
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Why do some software not get load balanced even when there are multiple cores?

While VTune Analyzer was running on a blade server with 8 cores, I observed the cpu useage percentage using mpstat -P ALL 1. mpstat showed me that VTune was taking up 100% of a single core, while all ...
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Can a multi-core processor run multiple processes at the same time?

I understand that a multi-core processor can run multiple threads of the same process at the same time using its different cores. Can it also run multiple processes at the same time(each core running ...
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Core i7 vs Phenom II x6 [closed]

I have to made a setup for a PC that's going to be used to do heavy processing with ... Microsoft Excel ( -.-' ) Yep, I know how non-intelligent is make heavy processing with Excel, but I tried to ...
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3answers
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Is there a simple UNIX command for finding out how many cores I have to work with?

I've got an Ubuntu VM on my Mac. Is there a command I can run in Ubuntu that will tell me how many cores I have to work with? I could do "about this mac" on the host, but I'm not sure how well the ...
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Windows Virtual PC, multi-core possible?

I have a PC based on a "Intel i7 975". My OS is "Win7 Ultimate 64bit", and I have installed "Windows Virtual PC" + "XP Mode". My problem is that only ONE core is virtualized, so, can I virtualize two ...