Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Number_Of_processors environment varaible on dual core machine

Posted on 2007-03-21
8
Medium Priority
?
2,031 Views
Last Modified: 2012-05-05
What should the Number_Of_processors environment varaible be set to on a dual core machine running vista? I would think 2, but I see mine is set to 1. Is this correct?
0
Comment
Question by:johngetty
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 11

Expert Comment

by:JamesCssl
ID: 18769209
It should in fact, be 2.  I'm running dual core, and it does say 2.
0
 
LVL 70

Expert Comment

by:Merete
ID: 18769395
0
 

Author Comment

by:johngetty
ID: 18784113
I can not change mine, it keeps changing itself back to 1. Any idea why?
0
The Ideal Solution for Multi-Display Applications

Check out ATEN’s VS1912 12-Port DP Video Wall Media Player at InfoComm 2017. Kerri describes how easy it is to design creative video walls in asymmetric layouts and schedule detailed playlists ahead of time with its advanced scheduling feature.

 
LVL 70

Expert Comment

by:Merete
ID: 18784602
is your  machine  Hyper Threaded ?
Can your mainboard manual give you any info?
Did you install Vista first?
How to dual boot Vista and XP (with Vista installed first) -- the step-by-step guide
http://apcmag.com/5485/dualbooting_vista_and_xp
Does a dual-core processor count as one or two for licensing purposes?
http://blogs.msdn.com/oldnewthing/archive/2006/10/02/780255.aspx

restricting the number of threads used on a dual-core Intel machine
To check whether you are using multiple threads you can run

mm <- matrix(rnorm(1e6), ncol = 1000)
for (i in 1:10) print(system.time(crossprod(mm)))
I do the timing multiple times because sometimes it will only use 1
thread for the first few cases then switch to multiple threads.  If
the elapsed time (third element of the timing result) is less than the
user time (first element) you are using multiple threads.  For example>> please continue>>
http://www.arcknowledge.com/gmane.comp.lang.r.mac/2006-03/msg00007.html

0
 

Author Comment

by:johngetty
ID: 18802203
The motherboard is the Asus Striker Extreme - Nvidia 680i chipset. I did reinstall Vista, and now the number_of_processors is showing 4, and I verified muliple cores are now being used. Still cant explain how it changed and why I could not manually change it back.
0
 
LVL 70

Expert Comment

by:Merete
ID: 18805312
Sounds good john, I take it you have solved the problem now?
Probably the install proceedures, Vista should install first. As I mentioned in my previous comment.
Please close your post with either an accepted answer or assisted to all who have contributed .
You decide what action to take.
if you need assistance on how to close your quetion
http://www.experts-exchange.com/help.jsp
thank you again
Merete
0
 
LVL 1

Accepted Solution

by:
Computer101 earned 0 total points
ID: 18970612
PAQed with points refunded (250)

Computer101
EE Admin
0

Featured Post

Portable, direct connect server access

The ATEN CV211 connects a laptop directly to any server allowing you instant access to perform data maintenance and local operations, for quick troubleshooting, updating, service and repair.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In this post we will be converting StringData saved within a text file into a hash table. This can be further used in a PowerShell script for replacing settings that are dynamic in nature from environment to environment.
This article shows how to use a free utility called 'Parkdale' to easily test the performance and benchmark any Hard Drive(s) installed in your computer. We also look at RAM Disks and their speed comparisons.
This Micro Tutorial will give you a basic overview of Windows DVD Burner through its features and interface. This will be demonstrated using Windows 7 operating system.
Windows 8 came with a dramatically different user interface known as Metro. Notably missing from that interface was a Start button and Start Menu. Microsoft responded to negative user feedback of the Metro interface, bringing back the Start button a…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question