0
votes
1answer
19 views

Cores and threads - Performance

I wonder if a 4 core/8 thread cpu will perform better than a 4 core/4 thread cpu. If the answer is yes; How much better will a 4/8 perform? EDIT: What if its for running 4 single threaded apps? And ...
0
votes
1answer
27 views

CPU usage drops dramatically

I am using an engineering software to conduct series of computationally demanding analyses. I have a relatively powerful desktop with the following specs: CPU: Intel core i7 3930k @ 3.2GHz RAM: 64 GB ...
-1
votes
3answers
558 views

What is the difference between multithreading and hyperthreading? [closed]

I've heard the terms hyper-threading and multi-threading, but what exactly is the difference between them? What kind of inlet processor uses them?
0
votes
2answers
120 views

Again about Hyper Threading

I have Asus 1025c with dual-core atom with hyper-threading enabled. When I play games, processor load rate always less than 25% (1 core). Is that means, that game (running single thread) occupies only ...
0
votes
0answers
53 views

Does Windows know how to appropriately assign threads to a quad-core processor that has Hyper-Threading on?

So, I have been trying to google for this answer, but I cannot find a direct technical answer to the question. (Or if it did, it was in a confusing way) So, say you have a program/game that uses 2 ...
2
votes
1answer
204 views

How to interpret this /proc/cpuinfo data?

I'm using Intel Xeon E5-2620 processor. These are something I'm confusing about. I'm using Linux and in /proc/cpuinfo it says model name : Intel(R) Xeon(R) CPU E5-2620 0 @ 2.00GHz According to the ...
2
votes
1answer
644 views

Quad Core host with hyper-threading, how many processors to configure in VirtualBox?

I have a quad-core i7 processor with hyperthreading (8 logical cores), when I configured a virtual machine to use 8 processors, VirtualBox gave me a warning saying that I only have four cores (which ...
-2
votes
1answer
129 views

How does a CPU with 2 core or more works and hyperthreading

I got a little confused,when there is 2 cores or more to a CPU does it mean that two processes can run on those cores or two different threads?.When there is hyper-threading does two threads run the ...
15
votes
3answers
2k views

Task Manager is saying the system is running with over a thousand threads

I opened up Task Manager and looked under the "System" area and saw: Threads: 1337 Since I have a dual-core processor with hyper-threading available (meaning four threads), how is it possible to ...
0
votes
2answers
243 views

Hyperthreading Calculating Load [duplicate]

I have a dual core core i5 with hyperthreading. Since hyperthreading allows for unused cpu time to be used by other processes, why would this make it seem like 4 logical processors (2 per actual ...
3
votes
2answers
1k views

Hyper Threading vs Overclocking

What is the difference between these two, and under what circumstances would I want to implement them? Are there circumstances when I would only want 1 and not the other? According to Wikipedia, ...
0
votes
0answers
64 views

Pstate (underclock) on single core hyperthreaded cpu

In Ubuntu, I can underclock the CPU using the CPU freq applet. My netbook is a Intel atom n270, basically single core with 2 "virtual cores" due to hyperthreading. I can underclock one of these ...
0
votes
1answer
189 views

Does hyperthreading divide GHz in half?

Imagine you have a CPU with 4 cores @ 2.2GHz, each one with a thread. Therefore, the OS thinks that it has 8 cores @ 1.1GHz each (I think). What would be the maximum GHz that a not concurrent ...
0
votes
1answer
516 views

Core i3 3220 for gaming [closed]

Since the Core i3 3220 has Hyper-Threading, will games like Battlefield 3 see and use the CPU as a virtual "quad core" rather than just 2 physical cores, so that AI and other features in the game run ...
3
votes
1answer
694 views

Eclipse: would more CPU cores with HyperThreading help increase speed?

I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new ...
3
votes
2answers
1k views

Is there a significant performance difference between virtual and real cores? [duplicate]

Possible Duplicate: Hyper-Threading and Dual-Core, What's the Difference? Most Intel processors feature what they call "hyperthreading," basically another virtual core for each physical ...
2
votes
1answer
1k views

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 ...
46
votes
5answers
8k views

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 ...
3
votes
2answers
6k views

/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 ...
7
votes
2answers
1k views

I have some kind of 4-core Intel CPU. How to I switch it back to dual core?

I have a laptop with Intel i5 M430 2.27GHz. The CPU has TWO REAL cores but it also has some kind of virtualization so Windows sees it as 4-core. In a REAL dual core CPU, a single threaded program ...
26
votes
2answers
14k views

Hyper-Threading and Dual-Core, What's the Difference?

In a conversation with the network administator, I mentioned that my machine was a dual-core. He told me it was not. I brought up the task manager, went to the perfomance tab, and showed him that ...
20
votes
2answers
8k views

What is hyper-threading and how does it work?

I've heard the term hyper-threading thrown around a bit recently, what exactly is hyper-threading and why is it important?