Solved

Is is possible to permanently set processor affinity?

Posted on 1997-12-13
5
1,910 Views
Last Modified: 2013-12-28
I have a dual processor Pentium Pro and I wish to always run a given application on one processor or the other ("hard affinity" in Microsoft terms).  I know how to temporarily set it through the task manager but this application-to-processor association is lost when the application ends.

The primary application I use is Microsoft Excel 95/97.  I am looking for means by which I can "permanently" set this processor affinity (utility, registry tweak, etc.).
0
Comment
Question by:swartwe
  • 3
5 Comments
 
LVL 4

Expert Comment

by:TimCaturaHouser
ID: 1787470
I don't know of a meathod for this. MS is very proud of the fact that most of their apps usually run faster with SMP. Are you saying Excel runs faster with 1 processor?
0
 

Author Comment

by:swartwe
ID: 1787471
I don't mean to imply that Excel runs faster with one processor.  However, I have an Excel application which often requires hours to run and I want to dedicate it to one processor so that system response will always be good, regardless of what Excel is doing (even though doing so will cause the Excel application take considerably longer to run).  This is why I want to explicitly set the affinity.
0
 

Accepted Solution

by:
plummer earned 100 total points
ID: 1787472
Create a simple application as follows:

void main(int argc, char ** argv)
{
    // Set desired affinity
    SetProcessorAffinity( ...whatever affinity you'd like...);
    // Launch Excel and let it inherit this affinity
    CreateProcess("C:\Program Files\...\excel.exe");
}

Then compile this and call it "myexcel.exe" or whatever.  When you run it, it will launch excel proper.
0
 

Author Comment

by:swartwe
ID: 1787473
I cannot find the function "SetProcessAffinity" within the context of VC++ 5.0.  However, I can find "SetProcessAffinityMask".  It that the correct function?
0
 

Author Comment

by:swartwe
ID: 1787474
Correction to the last comment...It should have read "I cannot find the function "SetProcessorAffinity"...".  

Incidently, I found SetProcessAffinityMask in winbase.h.
0

Featured Post

What Security Threats Are You Missing?

Enhance your security with threat intelligence from the web. Get trending threat insights on hackers, exploits, and suspicious IP addresses delivered to your inbox with our free Cyber Daily.

Join & Write a Comment

Suggested Solutions

Update 11/3/2014 - Although the below article will get you to relocate the WINSXS folder, Microsoft has finally released a utility to reduce the size of the WINSXS folder. For some reason, it's not that straightforward. It only works on Windows 2008…
NTFS file system has been developed by Microsoft that is widely used by Windows NT operating system and its advanced versions. It is the mostly used over FAT file system as it provides superior features like reliability, security, storage, efficienc…
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…
The Task Scheduler is a powerful tool that is built into Windows. It allows you to schedule tasks (actions) on a recurring basis, such as hourly, daily, weekly, monthly, at log on, at startup, on idle, etc. This video Micro Tutorial is a brief intro…

743 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now