Questions tagged [multi-processor]

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Can any program be run on multiple cores? Will the CPU decide that? Or can only certain programs run on multiple cores?

So I'm a little confused about the multicore CPUs - the impression I was initially under and what I thought I heard before was that some programs can't be run across multiple cores - those in which ...
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Is there a version of enblend supporting more than one CPU core / thread?

The task manager ksysguard tells me that only one core is being occupied fully with enblend. Sometimes enblend hops between cores, but it is apparently not developed to distribute its work among more ...
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How to fix the CUDA out of memory error on EC2 instance while running inference pipeline?

I am trying to run a complete inference pipeline which takes a number of images and first runs Object Detection (multiprocessing) and further runs a Classifier (multiprocessing). I have tested the ...
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Airflow scheduler stops after few hours

I am running 3-4 python DAGs.The issue is that the scheduler goes down after 4-5 hours. When i start it, it runs fine and DAGs do run, but after few hours it goes down with following error: ...
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How does multi cpu system shares pci-express bus?

For a modern single-cpu system things are transparent: there is multicore cpu, where cores are talking via uncore functions (like L3 cache, shared on-die memory controller). Uncore does also all the ...
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What's the difference between a multiprocessor and a multiprocessing system?

I'm studying IPC for a simple test I have tomorrow. The book my classroom uses is not the best: it makes a lot of typos and its exercises have been proven wrong or terribly ambiguous more than once. ...
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3 answers
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Homogeneous cores and heterogeneous cores

I am currently reading up on multi-core architecture for CPUs. However, I am having difficulties understand the meaning of "using one core design repeated consistently" which describes homogeneous ...
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0 answers
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"Missing" L3 Cache in Opteron 6274 on Windows Server

I have 4x AMD Opteron 6274 CPUs in an HP DL585 G7 server. Windows Server 2016 only shows these CPUs as having 12MB ea. of L3 cache, although every source on the internet says they should have 16MB (...
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2 answers
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Processor speed locked at low GHz after computer runs for a few minutes

Lately I realize that my Processor speed will reduce and locked at some level after some minutes I ran the Computer (0.8GHz). When I first run the Computer, my Processor speed is doing fine(1.5GHz), ...
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12 votes
5 answers
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In the context of this quote, how many 'chips/sockets' do personal computers contain?

My textbook says the following: Not only have microprocessors become the fastest general purpose processors available, they are now multiprocessors; each chip (called a socket) contains ...
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2 answers
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I enabled Multiprocess Windows in Firefox 49, but still 1 process

in Firexfox 49 I just enabled Multiprocess Windows. browser.tabs.remote.autostart set to true, also extensions.e10sBlockedByAddons to false and adding browser.tabs.remote.force-enable equal to true. ...
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-1 votes
1 answer
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what is the the reason CPU utilization gets high?

For simplicity, lets consider I have a single core processor. I have 2 task running in parallel. My understanding is the processor will run the tasks in round robin fashion i.e. one at time time. ...
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1 answer
2k views

Why is the processor limit in VMware player lower than the number of physical cores on my CPU?

My CPU has 18 cores, and, due to hyperthreading, 36 logical processors. However, VMware player's highest option in settings is a 16 processor virtual machine. Is there a reason for this? I have tried ...
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1 answer
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Adding second Xeon E5430 to workstation

I have a PC with a Supermicro x7dwa board and one Intel Xeon E5430 processor. I tried to add a second identical CPU to the board, but it stops the PC booting. The power LED on the board never lights ...
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3 votes
1 answer
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Windows 10 does not see second CPU

I have Dell Precision T5400 workstation with two Intel Xeon processors. One a x5450 (quad core) and a e5450 (quad core). Both CPUs are recognised in the BIOS click to enlarge I can not even install ...
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System tick timer interrupt in SMP

Is system tick timer interrupt in SMP system synchronized among CPUs/cores? If not, how is it solved?* Sorry for my English. EDIT: With system tick timer interrupt I mean interrupt from system timer ...
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2 answers
726 views

Can I use e10s (multiprocess) in Firefox Dev Edition?

I am using Firefox Developer Edition because I need the browser toolbox features for my work creating add-ons. However, I really like speed boost from the new experimental multi-process feature (...
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-3 votes
1 answer
777 views

Windows Task Manager not showing all cores?

I have Fujitsu RX200 S6 servers, which are Xeon 5500/5600 compatible. Up to today, I had dual X55nn (not sure of exact model) installed. Windows Task Manager was showing 24 separate graphs. I was ...
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How is it possible for me to hear the audio of multiple different videos on my computer? [closed]

I am reading this book and so far, being in chapter 3, I understand that multiprogramming and multiprocessing allows for faster execution of multiple existing processes/threads. I am reading into all ...
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1 answer
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How does distributed computing work?

I heard a 3D modeller say that when he renders a scene he uses multiple machines to do it because simply the hardware is not powerful enough and he is using the collective computational power of more ...
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-1 votes
1 answer
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Can there be a true dual-CPU & dual-memory laptop?

The ASUS Transformer Book Trio TX201LA is a dual-processor, dual-memory, dual-storage laptop which also runs 2 different operating systems. But can one,somehow, run just one instance of Windows 8.1 on ...
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1 vote
1 answer
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Does windows 7 professional limit the number of cores?

I have a dual processor system, each processor supporting 8 threads, so the OS should report 16 cores, which Linux does. But Windows shows just ten of them (even the 64-bit version). Six cores were ...
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1 vote
2 answers
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2 Processors server and RAM

I am in the process of buying a Dell T620 server with two E5-2660v2 processors and 128GB of RAM. Dell told me that if I order 128GB of RAM I had to have 64GB per processor. Why is this? Let's say I'm ...
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2 answers
947 views

One core at 3.2 GHz, one at 3.19 GHz - what's wrong?

I have an i7 which is supposed to be running a clock speed of 3.2 GHz. However, in the System dialog it shows 3.2 and 3.19 GHz. and in the task manager, it also shows 3.19: What am I missing here?
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2 votes
2 answers
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How much the CPU clock speed matters over number of cores? [duplicate]

I was comparing various desktop/server processors on Intel's website and found that Xenon Coprocessor family constitutes 61 cores. (firstly, this name lead me to think as if this would be a secondary ...
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2 votes
2 answers
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Are all Socket F Opteron processors interchangeable (within TDP limits)? [closed]

I have an old HP ProLiant DL145 G3 server I'm now using mostly as a budget 3D rendering node. Right now it has two Opteron 2218 processors (each is dual core). I'm looking at picking up a couple ...
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1 vote
2 answers
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Processors cores over processor speed [closed]

Dual 5520 Quad-Core Xeon 2.26GHz with HT & Turbo(2.53 GHz) -vs- Single Quad-Core E3-1240v2 (3.4 GHz to 3.8 GHz) I run web hosting. I'm just wondering which would be more ideal. Personally, I am ...
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21 votes
2 answers
43k views

How many instances of FFmpeg commands can I run in parallel?

I tired running 8 commands in parallel to fully utilize the CPU and speed up Video conversions, something like this: ffmpeg -i input.mp4 -t 60 -f mp4 /mnt/a.mp4 > /dev/null 2>&1 & ...
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4 votes
2 answers
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Can a single process be executed in two or more processors in a multiprocessor system?

I have heard that one processor can work on only one process at a time. Is this true? If so, then how can a single process be executed in more than one processors at a time? Is this even possible? ...
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-1 votes
2 answers
869 views

Is it possible to play windows games on a quad socket? [closed]

windows 7 or 8 does not support quad socket mother boards. by quad socket i mean that there are 4 processors. each can have a bunch of cores. so if it's 16-core amd processor, it would be 4*16 = 64 ...
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14 votes
4 answers
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How many physical processors does Windows 8 Support?

This article gives this comparison chart for the four Windows 8 Editions (Core is usually just called Windows 8). I notice specifically, about half-way down, the max physical processors is listed as 1 ...
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0 votes
3 answers
2k views

What BIOS settings should I tweak to maximize performance? [closed]

What are some BIOS settings that I should tweak to maximize performance of a dual-CPU workstation (if I don't care about power consumption)? I have an ASUS Z8NA-D6. update I have two Xeon x5670s on ...
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3 votes
2 answers
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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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1 answer
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How many cores can windows 2003 support?

Windows 2003 DataCenter x64 supports up-to 64 physical processors. Support Microsoft Now what does this exactly mean ? Number of logical CPUs or the number of physical processors i.e. four intel i7s (...
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4 votes
1 answer
6k views

How can I emulate more virtual CPU processor cores than physically available on Windows?

Is there a way that I could emulate the number of logical/physical processors for Windows like virtualization (VM) ? I need to simulate processors of about more than 64 and see some minor ...
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3 votes
3 answers
1k views

How can I ensure that exactly one process is running on a given processor/core?

I would like to do this so I can accurately speed test my processes, and just to be able to have the illusion of control. Maybe I want to reserve one processor for special programs. Maybe I want to ...
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1 vote
1 answer
214 views

What should I look for in a processor? [closed]

What are the facts I need to consider before buying a new processor ? As there are [for example] 3.2 GhZ Intel I3 / Core 2 Duo / P4 / equivalent AMD. I'll buy a new processor and my budget is ...
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1 vote
2 answers
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Mutli-processor workstation as a workstation/server

I work in a research institute and a number of programs we use are computationally intensive (I actually wrote one of them). Right now we have one computer that is dedicated for one of these programs (...
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2 votes
3 answers
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How to limit Windows 7 x64 to 1 CPU core?

How can I limit Windows 7 x64 to use only one core of one CPU? I already tried this and rebooted but it seemed to have no effect. Task Manager still shows four columns that were all in use from time ...
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5 votes
1 answer
7k 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 ...
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1 vote
2 answers
2k 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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16 votes
5 answers
31k views

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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67 votes
7 answers
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What Is Minimum And Maximum Processor State In Windows 7 Power Management?

I am talking about this: What should I set in minimum and maximum? I want good CPU performance but not overheated CPU and fan working like crazy.
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2 votes
1 answer
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GPU stream processors speed (Hz)

I've recently purchased a "Radeon HD 6870 1GB GDDR5" which spec says operates at 915 MHz and has 1120 stream processors. My question is simple; Does all 1120 stream processors operate at 915 MHz, or ...
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2 votes
1 answer
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How do I disable multithreaded calculation in Excel 2010 - as a permanent setting (without needing to set it on a worksheet)

I need to be able to have excel 2010 open (in windows 7 if it makes a difference) and have this setting defaulted to off. I've tried unchecking the box and closing excel, saving the setting on the ...
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1 answer
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Why do some misbehaving processes use 100% CPU and some 50% CPU?

When programs on my laptop crash, they sometimes start hogging CPU. I have noticed that some processes use 50% (like firefox, various games) but a few use 100% like (VLC, GOM) etc. Does this have do ...
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5 votes
4 answers
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Why are multiple levels of caches used in modern CPUs?

I recently read about processors (mainly multi-processor) and I came across the concept of multi-level caches. These designs have several levels of cache in this case to increase the performance. I ...
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0 votes
3 answers
757 views

AMD 700, 800 series chipset. I'm lost [closed]

I've been an Intel / NVidia user ever since I started using computers. Intel really gone up with the prices, and they won't get cheaper. So I decided to get an AMD. But WHICH one? I mean.. not ...
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2 votes
1 answer
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What is the difference between MultiCore and MultiProcessor?

What is the difference between MultiCore and MultiProcessor please?
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6 votes
3 answers
1k views

Quad cores have lower processor speed, are they still better?

So, I am looking at building a new laptop. Two examples of the processors I am looking at are: Intel® Core™ i7-740QM Quad Core 1.73GHz 6MB Intel® Core™ i5-520M Dual Core 2.40GHz 3MB Now I realize ...
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