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[ubuntu] Dual Cores running not at the same load

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http://ubuntuforums.org – Hey all I do not know if this is the right place to post it so, if not please move the topic. I am running a 1G RAM machine with a 2.4 dual core, laptop. OS: 9.10 x64bit I am trying to run a 3D modelling program AC3D. I notice that one of the cores is running at 100% and the other one at 10% at best. Do you know how can I use the second one as well so that my system is not that slow? something out of topic: Also any free 3D modelling programs as I will need it for a month and I do not feel like paying 100$ for a Univ project. (Hardware)

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Submitted by colm on 12/08/2009 – Made popular on 12/08/2009

Stories similar to [ubuntu] Dual Cores running not at the same load

Hi folks,

I want to know how to run two unix programs on two different cpu cores on a 2-core or 4-core or 8-core CPU machine? Extending this how would i run four and eight unix programs on 4-core and 8-core machine respectively?

If this can be done, how to know which program is assigned to which core?

I have two servers at hand, both with 16 cores. The first is running Debian, the second running Ubuntu.

I have written a small multithreaded java app that creates 16 threads.

I have seen that a lot of people are having this same issue. I am running a Lenovo V570 i5 4 core, 6 gigs of ram, and am running 11.10 Onieric Ocelot.

On my system monitor graph it shows CPU at 20%, when I open the monitor it shows core #1 at around 90%, the other cores fluctuate at or below 5-12% if even.

I don't know what or who is using this amount of CPU, the machine is a bi-quadcore with 16 GB ram. Running Ubuntu 10.04

Every core seems to be using 10-20 % except for one core that seems to be using 100% constantly.

What is actually the difference between deactivating 2 of the cores as in this screenshot and having a dual core machine

I guess is not the same as having a dual core machine, right? Do you know where i can find some information related?

I am trying to run my program in more than one core. I have 12 cores in my desktop and want the computer to use 1,2,3,4,......,11,12 one by one and want to test how the program performs in different number of cores. I tried using -t4 or -t 4 after the executable like.

./a.out -t4

but I cannot make sure whether its using exactly 4 or not.

When it comes to multicore processors, if the frequency is rated as 3GHz, does that mean it is 3 GHz per core or 3 GHz divided by the number of cores.

Like in the title, for a 3 GHz dual core, would it be 3 GHz per core or 3 GHz / 2 cores = 1.5 GHz per core?

Thanks for your help.

I have access to a CentOS 6 web server running Apache 2 and MySQL 5 (I can find exact versions if that really makes a difference). This box has dual six core Xeons.

What I find looking over the CPU graphs is that the first two or three cores (0-2) hit 90% usage whilst the other nine are only reaching 30-40% usage.

Apache & Core Usage 46 weeks 2 days ago

If you have like... 10 cores... and you use Apache and your load average is always under 5.0...

Would it slow your site any if you lowered to 6 cores?

(assuming you never reached any spikes that hit 6.0 in load)

Specs: Xen, 10 Cores at 2.0GHz, CentOS 5 64bit, using "uptime" to find load averages.