Tagged Questions

1
vote
0answers
113 views

Dynamically disabling cores in a power-efficient way?

I am looking for a mechanism to dynamically disable cores in Linux in order to minimize power consumption. Unfortunately, disabling cores using the following simple approach actually increases power, ...
4
votes
2answers
930 views

How to make commands in Mathematica 8 use all cores?

Many commands in Mathematica 8 (Integrate, Simplify, etc.) seem to only be using a single core on my system. Is there any way I can change the affinity so that it utilizes all cores for computations?
0
votes
1answer
49 views

Binding interface per core

I just wonder, is it possible (using Linux 2.6) to limit overhead done by ethernet interface to one specific core. Ie. I have core2duo CPU, and two ethernet interfaces: eth0 and eth1. Is it possible ...
0
votes
2answers
621 views

/proc/cpuinfo gives CPU info per core or per thread?

My CPU has 2 cores, so I can see two parts in /proc/cpuinfo. But, I want to know if CPUs that support Hyper-Threading (or similar tech), will /proc/cpuinfo give CPU info per core or per thread (or ...
6
votes
4answers
1k views

How do different Linux distributions handle multiple cores and multi-threading?

I realize that by asking this question I have already labeled myself as "unprepared" for high-performance workstations, but whatever, you have to start somewhere! I would like to know how different ...
2
votes
1answer
489 views

How to mitigate the multi-core “performance penalty”

I've been doing some computations at home and at work and have noticed some unexpected performance issues. The work machine is quite a bit more "serious" than the home machine, but sometimes the ...
2
votes
2answers
921 views

Multiple CPU cores in Virtual Box

When I was using Virtual Box in Windows 7, I could choose how many CPU cores to assign to the guest OS. Now I'm using Linux, and when I installed Virtual Box, I couldn't find that option. System ...
1
vote
1answer
1k views

Linux 'top' utility widly inaccurate (more so for multi-CPU/core hardware)?

After using 'top' for long time, albeit basically, I have grown to distrust it's '% CPU' column reports. I have a 8-core (quad core Intel i7 920 with hyperthreading) hardware, and see some wild ...
0
votes
1answer
476 views

Core i7 on linux loses its multithreading capability after suspend

On my debian-linux system, with a core i7 920 , each time I resume after the command "pm-suspend" (suspend to RAM), mutlithreading capabilities almost disappear. More specifically, two distinct ...
2
votes
3answers
529 views

In a multicore system, will each cpu have its own linux kernel?

What i meant was, in a multicore system with 'n' number of cpu's, will each cpu have its own linux kernel installed, or will all cpu's have a copy of the same kernel image? Another question ...
1
vote
6answers
2k views

Can Linux be run under Windows 7?

In Windows 7 if you have a multi-core processor you can run virtual machines. There is something called XP mode which lets you do a full XP install and lets you run XP just like the real thing, ...