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.
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Is it possible to simulate a singlecore CPU in a multicore CPU?
I have a multicore CPU with Windows 10 and I would like to test a Software running as if my PC was a singlecore CPU.
Is there any way to limit Windows 10 installed in a multicore CPU (Quad Core) to ...
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How do you control thread affinity across multiple processes on Linux?
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How do I run two benchmarks such that:
They are both executing concurrently
Both benchmarks have half their threads on each socket.
No two threads share the same core.
Background
I have two ...
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Why does everything I do seem to use all my CPU cores?
I have an Intel i5 4300m. When I open the Windows Resource Monitor, it shows 4 cores.
When I perform operations such as using the browser or running a simple Python script, the % usage of all 4 cores ...
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Does 'make' take advantage of multiple cores/threads? (linux)
We are considering a new workstation (will be running Fedora 25/26), and would like to know what a good CPU would be. To start off, I need to know how many cores I need. To help decide that, I want to ...
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Threads (versus cores) and rated CPU clock speed, what is the effect?
If my CPU is rated at 2GHz, and has 4 cores supporting 8 threads, are all 8 threads running at the rated clock speed? Or are they running at 1GHz each since there are twice as many threads as cores?
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How to log/get a report on threading performance in Windows?
So with programs like Process Explorer and Process Hacker you can see what the individual threads from a given process are up to. However as far as I can tell its just an active monitor with no way to ...
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ffmpeg performance with multiple core cpu and windows [duplicate]
I call ffmpeg command to generate mp4 using input of mp3 and folder of images
my problem is running 3 instance of ffmpeg cause 8 GB 6 core to be full with 100% cpu this is the command I use , any ...
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Terminology for cores in a multicore processor [duplicate]
What is the difference between logical and physical cores in a multicore processor? And is execution core another name for a physical core?
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How much do IDEs take advantage of multiple CPU cores?
So, how much do IDEs, for instance Android Studio or Eclipse, take advantage of multiple threads and CPU cores? That is, how much faster do they run on, say, a quad-core CPU compared with a dual-core ...
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How can I change the distribution of Cores across NUMA-nodes?
On Ubuntu 14.04 TLS for 36 total cores = (2 x CPUs x 9 Cores x 2 HyperThreading), lscpu give me:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little ...
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What Control unit has the power in a multicore cpu?
A processor with cores is just a bunch of single cpus thrown together on a single IC (Integrated circuit)(That's why my /proc/cpuinfo shows 4 of them).
A CPU is made up of some sub-units always ...
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Parallel Programming in AMD based laptop
I've a Lenovo G50 series laptop with AMD A8-6410 @2Ghz, 8 GB RAM with a R5 230M and Radeon HD 8550M cards inside.
In Windows 10 is it possible to run a CLI based program ( ffmpeg for video ...
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Logical vs. Physical CPU performance
A computer has 2 physical cores, and 4 logical cores (For example, a computer with an i5-3210M processor).
When a program A runs, htop shows that it uses 100% of 1 core, and other 3 cores are nearly ...
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How do Multi cores CPUs get tasked?
I have an AMD Octo core CPU. As I watch the CPU meter app, I am noticing that while all cores can have activity, it seems a couple have higher and more consistent activity.
How does the "work load" ...
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Turn off cores in multicore processor
I have several home grown applications that run together, exchange data, and are time synchronized with each other. I've found that having the OS bouncing around between cores fouls up this ...
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Hyper-Threading (SMT) Affinity and Equality
This question goes out to the Intel gurus that I know are out there. Are both threads on a physical CPU treated equally?
As we know, hyper threading on intel CPUs is a system in which each physical ...
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CPU usage by Adobe Dreamweaver on a HP probook G1 450 - i5 Quad Core
Is CPU usage of 40% - 50% normal when running Adobe Dreamweaver CS6, or is there an underlying problem? My laptop is a HP ProBook G1 450, i5 Quad Core, and has 8GB RAM.
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How to disable some cores on Intel machine
I have a machine with two Intel(R) Xeon(R) CPU E5-2618L v3 processor, which has 8 cores on each socket.
I only want the OS or hypervisor (such as Xen) on the machine to detect only one socket and ...
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Strange relation between processor cores usage and their temperature
I have a four core processor.
When running office apps, all processor cores usage is about 1% and the temperature is about 32-38 degrees each.
When running a specific game, core 1 works at 100% ...
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Is a single core process reassigned to some other core automatically when the core utilization is high in linux?
Generally, by default, if a single core process starts to have high core utilization, will it be reassigned to some other core which can handle and unless it is exclusively defined not to with in the ...
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Why multi core processors producing less heat
We are using multi core processors partially, because the waste heat of single core processors was to high to handle. (correct?)
Now we are using multi core processors that create less heat and need ...
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ffmpeg encoding to VP9 results in Google Chrome-unplayable video, while to VP8 works
Plenty of time passed, since I have encountered the problem, specified in the subject.
I tried multiple ffmpeg static builds, have built it from Git repository myself with different flags and on all ...
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Spread VirtualBox VMs over cores
I am using many VirtualBox VMs with different OS on one Ubuntu Linux host for development. Sometimes my scripts get wrong and starts loading 100% of VM cpu. And when one VM loads 100% cpu I cant even ...
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AMD FX-4350 randomly switched from 4 to 2 cores
I am using standard build Windows 10 Professional and out of nowhere, I restarted my computer and task manager is only recognizing 2 of the 4 cores. I have checked my BIOS and it is recognizing all 4 ...
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Can't seem to use 2CPU on Oracle VM VirtualBox 5.0.2
I have an Intel® Celeron® Processor N2815. I've confirmed Virtualization and VT-x are enabled.
I can't choose more than one CPU when configuring a Linux machine on VirtualBox; the scroller is grayed ...
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How do I decide between CPUs with different clock speeds, number of cores and L3 cache sizes?
I am a web designer and I'm considering purchasing a Mac Pro (one of the new cylindrical ones). I've scoured the internet for information on the different processor options that they offer, but I'm ...
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How can I output y-cruncher Pi calculations to a .txt file?
I have y-cruncher running on my desktop. Unfortunately, I cannot figure out how to write the calculated pi to a specific number of digits onto a .txt file. The program write an output text file with ...
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Does the guest OS need updates/changes after changing the number of cores in VMware Player?
I installed ubuntu on a vm in VMware Player and forgot to change the number of cores from 1 to 8. If I change that now will the linux kernel need to be recompiled or anything like that or will it just ...
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On which processor(s) do my simulations run?
I am currently running 11 numerical simulations (coded in C) on another Mac computer via my Terminal using ssh and screen (Bash) on Mac OS.
The computer that is running the 11 processes has 16 ...
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Running Windows processes in separate cores
I have an AMD FX-6200 (3.8GHz, six cores) and I would like to optimize it in this way:
Core 1: Used only by key Windows processes, e.g. explorer.exe, svchost.exe, rundll32.exe, etc.
Core 2: Used only ...
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Virtual Domain Cpu Time limit
I'm running Munin on Ubuntu 14.04 to monitor my virtual machines (running KVM, libvirt). I often get a notification that CPU usage on my base system is 'critical':
mydomain :: Virtual Domain Cpu Time
...
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setting affinity for multiple cores on dual cpu system
We are using some systems with 2cpu's with 6 cores/12 threads each so 24 threads in total, for quite a lot of multitread simulations. Because the problem doesnt scale perfectly, i usualy run 4 ...
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How to compress or hide the processors at top of htop on large machines?
I like to use htop to show me how the server is being used.
Unfortunately with modern servers, the machine might have 48 or even 120 cores. This means that
I can only see the first few lines of htop ...
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Linux command-line utils with built-in support of multithreading
I would like to be able to compare performance of multicore computers from a point of view of a user who performs typical day-to-day tasks in Linux. My current goal is to collect a list of compute ...
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Unlocking the 6th core of Phenom II X4 960T
I have a AMD Phenom II X4 960T processor on an Asus M4A78LT-M-LE (BIOS 0803) motherboard.
CPU-Z screenshot:
I am trying to unlock all the 6 cores of this CPU by enabling advanced clock calibration ...
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Are CPUs more stable with one or more cores disabled?
I was reading this article, and I couldn't help noticing this:
...7003.38 MHz, with two CPU cores enabled and hyper-threading
disabled.
Does disabling some CPU cores & disabling Hyper-...
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One cpu core working harder than the rest
I have seen that with my AMD A8 cpu one of the cores is working harder than the rest. See below:
The running processes:
Does any one know if this is a problem or just a natural assurance.
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Why a demanding proccess doesn't use another core?
I've got an older Core i5 laptop and I play Dota 2 game sometimes. It's pretty demanding for my processor. But when I quit the game and look in system resources graph (in Taks Manager) and see ...
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Ubuntu shows only one core out of four with nolapic booting option
I have a problem similar to one in
http://ubuntuforums.org/showthread.php?t=1084622
http://ubuntuforums.org/showthread.php?t=1740798
http://ubuntuforums.org/showthread.php?t=1631926
i.e. my ubuntu ...
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Comparing an i7 (3.2Ghz) against an i5 (2.5Ghz) using linpack shows the i7 being worse
I am trying to compare the number crunching performance of an i5-3210M @ 2.5GHz with 6GB ram and an i7 970 @3.2GHz with 24GB ram. The results are so unexpected I presume I am either doing something ...
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Is parallelism in computer science always directly tied to the number of processor cores?
Specific to the Java programming language, would it be accurate to say that two threads can be concurrent, but can only truly be run in parallel if there are two or more cores?
user87216
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Why is my laptop both dual core and quad core at the same time [duplicate]
I bought an Alienwaremx14 with the following specifications , it is clearly stated here that my CPU is dual core
However when i open Window task manager , I was shocked to find out I had four CPU ...
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How does multi-core architecture work with regard to parellelism?
I think I am correct in saying that scheduling is the/a main principle of the single core CPU, where the CPU is interrupted when switching from processing one set of instructions belonging to one ...
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Will I see an increase in performance if I use Windows 7 Professional over Home Premium? Regarding multiple physical cores
I have 2 physical cores and Home Premium specs say it only recognizes one but Pro recognizes multiple. If I swap out my Home Premium with Pro will I see an increase in performance? I have an Intel i5 ...
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Going from dual-core to quad-core to speed up multi-tabbed browsing in Chrome [closed]
I've got an Athlon II 240 and often times when I suddenly open 5-10 new tabs in Chrome, both my CPU cores go to 100% and all my previously opened tabs freeze for some 10-20 seconds until the new pages ...
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Why are the number of cores in a processor normally even
Whenever i look at specifications of the processor , the number of cores is always 2 , 4 ,8 .
Is there any reasons why the number of cores are always even and not odd like 3 , 5 , 7
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How to find out the total number of virtual core your CPU has
This is the specification of my computer however i have problem finding out how many virtual cores are there in total .
I would like to know if there is any command in windows 7 which would help me ...
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How is CPU time measured on Windows?
I am currently creating a program which identifies processes which are hung/out-of-control, and using an entire CPU core. The program then terminates them, so the CPU usage can be kept under control. ...
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How can I tweak Windows 7 or 8 to Utilize Multi Core Processors?
Nowadays, desktop and workstations are getting more powerful as they have multi-core processors.
For the versions of Windows that support multi-core processors, do these versions actually utilize ...
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Is having more CPU cores a better thing for running a web server?
I was reading about how User threads are mapped to kernel threads on Wikipedia. From this article I understand that FreeBSD uses the 1:1 (Kernel-level threading).
So each User thread created by the ...
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