Questions tagged [hyper-threading]
A technology by Intel to increase processor throughput, by adding independent logical processing units in each core (and thus exposing two times the number of cores to the operating system).
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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 ...
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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 ...
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How should I interpret this /proc/cpuinfo data?
I'm using Intel Xeon E5-2620 processor. There is something I'm confused 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 ...
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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 ...
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Single Threaded Qaud Core v.s Hyper-Threading Dual Core [duplicate]
Let's say we have two CPUs, One is Quad Core 3.2 Ghz with 4 Cores, and We have a Dual Core 3.2 Ghz with 2 Cores with 2 threads in each Core (Hyper-Threading). My assumption as a programmer will be, ...
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Hyperthreading load
Would loading all threads on a hyper-threading enabled cpu (e.g. core i7 dual core with 2 threads per core) be (in this case) double the load the cpu? To clarify, lets say I have a dual core cpu with ...
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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 ...
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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 ...
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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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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 core)....
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How can I decide real vs virtual cores if i need intensive calculus?
Assume that I have a computer called A with a processor that has two cores and has hyperthreading, i.e it has 2 cores with 4 threads (I understand that this can supply to 4 processes simultaneously), ...
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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, ...
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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 ...
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Running threads on a non hyper-threading Intel processor
Intel Pentium Processor E5700 (2M Cache, 3.00 GHz, 800 MHz FSB) does not have hyper-threading but it has has 2 cores so I am assuming it has 2 threads
Now if I write a heavy number crunching program ...
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disable hyperthreading on a multi-core Dell PC
I have a Dell desktop running Windows 7 Professional. I think the processor is an Intel Core i7-2600
Recently a computer expert who specializes in Linux clusters was looking at my desktop PC and ...
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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 ...
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Optimum number of threads to use for best parallel processing on an i5 [closed]
I'm interested in running some reasonably heavyweight processing on my desktop/laptop (not so bad that it requires a cluster, but needs a good home machine). My question is how many threads to create ...
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Duplication of Architecture State means physically extra?
Hyper-Threading Technology makes a
single physical processor appear as two logical
processors; the physical execution resources are shared
and the architecture state is duplicated for the two
logical ...
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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 ...
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How to disable HyperThreading on Mac OS X Lion?
Unlike my old Windows Boxes and Linux Boxes, I do not have access of something similar to a BIOS on my MacBook Pro.
I want to disable Intel i7's HyperThreading (so 4 cores look like 4 cores and don't ...
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Disable Hyper-Threading on Dell XPS L502x
Does anyone know how, or if it's even possible, to disable Hyper-Threading on an Dell XPS L502x?
I've checked the BIOS, which seems like it's hiding a lot of the usual options, but can't see anything....
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Disable hyperthreading on MacPro Xeon
We need to disable hyperthreading on several MacPros.
We have just two types of Macs - Dual QuadCore 2.4 "Westmere" and single CPU SixCore 3.66 "Westmere". All machines run 10.6.8
For some strange ...
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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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Is this processor burned?
I've recently exchange the processors in two PCChips boards. Both boards are LGA775. Board A is P17G(Pentium 4 HyperThreading 3GHz) and board B is P49G(Pentium Dual Core 3GHz). I use board A to watch ...
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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 ...
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What happens to HyperThreading when I throttle the state on battery power?
If I have a laptop with an i7 that I decide to throttle the maximum processor state to 50% on battery power, what happens in regard to HyperThreading?
Does it get activated at 50% frequency? or does ...
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CPU monitoring: hyper threading, current clock speed
I think it'd be interesting if it were possible to check out at how much Ghz each one of my cores is running. Is it possible, at all?
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Does the i5 processor in the 2011 iMac allow hyper threading?
On the intel website, it says that the i5 processor uses hyper threading. Elsewhere on the internet I've read various conflicting reports. Can anyone give me a definitive answer?
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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 core.
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How does Windows processor affinity work with hyperthreaded CPUs?
How does Windows processor affinity work with hyperthreaded CPUs?
Let's use an example (pictured) of a system with four cores, each with a hyper-threaded virtual core.
Which cores correspond to each &...
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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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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 are ...
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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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Disable Hyperthreading in the Windows 7 registry
Some bios's Do Not have the option to disable Hyperthreading of the CPU, it there a way to disable it in the Windows 7 Registry? Or a tool or software?
I know about msconfig boot tab (advanced ...
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How to query Intel® Hyper-Threading current state and how to enable/disable it?
How can I see if my Intel® Hyper-Threading is enabled or disabled on my Windows 7?? There is a way to change it?
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Should I disable hyperthreading in an Intel CPU?
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 ...
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How much speedup does a hyper thread give? (in theory)
I'm wondering what the theoretical speedup is from hyper threaded CPUs. Assuming 100% parallelization, and 0 communication - two CPUs would give a speedup of 2. What about hyper threaded CPU?
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Number of cores available to VMware Player limited to physical cores or hyperthreaded cores?
I have an i7 with 2 physical cores, because of hyper threading Windows 7 reports 4 cores (at least in the Task Manager). My question is, when allocating cores to a VM in VMWare Player is it taking ...
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Full HD and hyperthreading
I have 3 GHz Pentium 4, and it's not best for playing full HD videos. I noticed, that when I'm playing full HD video, only 50% of my cpu is used, so only one of virtual cores is doing it's job on full ...
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How to disable HT in a Intel Atom D425?
I can't find in the BIOS the option to disable HT.
Is this a BIOS problem or the processor itself doesn't support running as a single core?
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VirtualBox recognise all threads as cores or only physical cores for dual core Core i7?
When I run VirtualBox (or other virtualisation software) it lets me select how many cores I like to allocate to a virtual machine.
Since I have a dual core 2.66gHz Intel Core i7 with hyperthreading, ...
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What is the difference between hyper-threading and multiple cores?
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 ...
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How can a single threaded application like Excel 2003 take more than 50% of a hyper-threaded or dual-core CPU in task manager?
I'm waiting for Excel to finish a recalculation and I notice that the CPU usage as reported by Task Manager occasionally spikes to 51% or 52% on a Pentium 4 with hyper-threading. How is a single-...
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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?
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