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Questions tagged [multi-core]

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.

4 votes
2 answers
32k views

Why does Windows 10 have CPU core parking disabled?

Why does Windows 10 come with core parking disabled? It seems to me, that core parking is good in most cases. Especially considering Turbo Boost does not work until some cores are parked. Also why ...
LOST's user avatar
  • 173
1 vote
2 answers
69 views

launching multiple instances and performances

I am making some benchmark tests and I use "truebench". This is a simple C program which just do a memset and a memcpy several times. On my laptop, when I launch only one instance I obtain 62s but ...
Leang-Ming MA's user avatar
8 votes
0 answers
14k views

How to utilize all cores on high-end CPUs using ffmpeg

I have a high-end HPE ProLiant DL325 G10 server with an AMD EPYC 7401P 24-core/48-thread CPU, 128GB DDR4 RAM, and a Intel P4800x PCIe NVMe. I tried to run ffmpeg to convert a video (MKV) to MP4 for ...
Aco Strkalj's user avatar
1 vote
1 answer
7k views

How many threads can I run in my program?

I have a python program that uses the threading module and runs multithreads that executes a function. The number 8 below is the number of threads in the program but I need to know what is the number ...
user9371654's user avatar
  • 1,237
0 votes
0 answers
135 views

VirtualBox in VirtualBox CPU core usage

Background: I am attempting to run a VirtualBox VM within a VirtualBox VM. The first host machine is running atop an Intel 4670k, with Intel Virtualization Technology enabled, with 4 total cores ...
Swizzy Studio's user avatar
2 votes
1 answer
230 views

Is there a significant issue to allocating all available cores to one VM if that is the only major task running?

I have a one-off task that requires me to use a VM to fix a build bug a software project using SCons (Python). The testing cycle is fairly short, resulting in frequent rebuilds. I'm using a 4-core ...
user3.1415927's user avatar
2 votes
2 answers
6k views

Is it possible to merge CPU cores?

Back in the past there was something called hyperthreading where a single CPU core acted like two cores. But is it possible to merge two CPU cores to an single one to improve performance on programs ...
Delta Oscar Uniform's user avatar
37 votes
5 answers
44k views

Can Windows make use of 16+ core processors? [closed]

There's currently a number of processors on the market with 12, 14, 16, 16 32 cores (AMD Threadripper, Intel i9) and so on. Can Windows 10 even make use of this power? We know that it can support up ...
Paul Alexander's user avatar
0 votes
1 answer
83 views

Real cores or threads in an i5 7500T?

They say an i5 7500T has 4 cores (so, in this case 4 threads). When I, for instance, calculate the 1 millionth Fibonacci number (single thread only, every number is dependent on its predecessor) using ...
Niels's user avatar
  • 611
0 votes
2 answers
108 views

Find core used from CPU utilization?

I have average and peak CPU utilization(in percentage) of a linux server with me . Mainly couple of web apps are deployed on the machine. I need to decide what AWS machine suits me based on that. AWS ...
user3198603's user avatar
0 votes
2 answers
13k views

If i5 has no hyperthreading why it has more threads than cores

I have read at a lot of places that i5 does not have hyperthreading and that i7 is i5 + hyperthreading. If it is true, how come many i5 processors have more threads than cores(4 cores and 8 threads) ...
Vivek's user avatar
  • 1
0 votes
2 answers
2k views

On a multi-core Windows PC, why does a single process only occasionally use all cores?

For years, I had the impression that a single process can only use at most one core of the CPU, but recently I found two examples where a single process used all the cores of a multi-core Windows ...
hocunofu's user avatar
2 votes
0 answers
315 views

Force process and kernel module to one core exclusively [duplicate]

I'm just in the phase of evaluating new possibilities, so this question may be a bit strange. I have a Quad-Core CPU which has to do some realtime tasks (it has access to some GPIOs, so this is ...
Elmi's user avatar
  • 199
0 votes
1 answer
909 views

Can I have Windows OS dedicate one or 2 cores to a specific prog./application?

I can often times find benchmarks that compare performance on certain tasks such as for gaming ( Frames per second). However, I have long wanted to use my multiple cores to quickly switch between apps ...
Bruce Whealton's user avatar
-1 votes
1 answer
2k views

How multithreading works on multicore cpu in linux..? [closed]

In one interview I got one question, If I have dual core cpu,can I run one thread on both CPU at a time? If possible how it is works.?
pranav's user avatar
  • 1

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