Questions tagged [multi-core]
133 questions
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Number of virtual cores + how to know the right value
from lscpu we get the following
lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s) per core: 2
Core(s) per socket: …
King David
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1 answer
number of cores available on a server
I need to find out, how many cores are available on a server at that moment. For example, it is a 8 core machine and running at 50% CPU utilization. Can this be assumed as 4 cores are available? or is there a more sophisticated way to determine…
Varun Gupta
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Tasks on server stay in sleeping
I logged into a server with multiprocessors and started 20 python programs, each processing part of my data.
However, it cost too much time so I checked top and found all ipython processes are in sleeping. What's wrong?
$ top -u calc
top - 13:36:27…
Lee
- 101
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1 answer
How strongly does the number of processors influence on the performance?
I use Windows Server 2008 R2 with Hyper-V. I can increase the number of processors in Hyper-V settings (http://www.youtube.com/watch?v=NQCMT-O6bMM).
How strongly it will increase the performance?
My question is: Why there are only 4 processers in…
novicegis
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1 answer
Can I improve speed in Hyper-V?
I use Windows Server 2008 R2 (it is host) with Hyper-V and a guest running Ubuntu 12.04 LTC. It is my settings:
RAM 32768
Cores (virtual processes) 4. (I need 12)
I also use virtual hard drive with 2 TB
Please, tell me:
1) Do I increase speed, if…
novicegis
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2 answers
Multi-CPU server with CPUs of differing core counts
Is it possible to have a multi-CPU server where the CPUs do not necessarily have the same number of core counts?
For example, a group of 4 at dual core and a group of four at quad core?
This question is independent of any OS.
EDIT
David answered…
IamIC
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Tracking down high CPU core utilisation
I have a system with 24 cores and for some reason only the first core is at 100% utilisation while the others are in the range of 20-25%.
I would like to get all processes that are running on the first core. The OS is Debian 6.0.
Jefi
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1 answer
CPU hardware: more cores means lower frequency at some point?
When taking a look at intel processor product list for servers, it seems like there is a correlation between the base frequency and the number of cores.
Take this list, there is no processor with base frequency above 3.6 Ghz and more than 10…
mihca
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1 answer
PHP - Multicore for hashing
I have a server with 2 intel xeons on it, this gives me quite a lot of cores. And on that server i have an app, that uses php to hash passwords in blowfish. But the issue is php is not using all the cores it could, so the hashing becomes slow as…
Jojo01
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Why do I need six cores in a cpu for a server?
I was getting specs for dell server and one cpu is an Intel Xeon with 6 cores, another 4 cores. What am I getting with this? Do I need six cores? What does that give me? I don't know what mult-core cpus give me but that's about all I can…
johnny
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For php webserver, what is faster, 1x 24-core server or 3x 8-core servers?
Pricing at Dell, it seems I can either get a single R430 or 3x R220's. The R220's would have 4C/8T processors, giving 24 threads. The R430 would have 2x 6C/12T processors giving again 24 threads.
For an CentOS 6 apache web server doing mostly…
user788171
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Hyperthreading can only create two threads?
HyperThreading can only create two cores/threads ?
More can not be created by design or is there any other limitation ?
Basit Anwer
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2 answers
Windows 2003 Server and Core2Duo processor features
I use my computer for development (ASP.NET 4.0/MS SQL Server 2008). I want to install Windows 2003 Server. But I want to know does Windows 2003 Server recognizes and utilizes full features of Core2Duo processor?
hotcoder
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