Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

When programs on my laptop crash, they sometimes start hogging CPU. I have noticed that some processes use 50% (like firefox, various games) but a few use 100% like (VLC, GOM) etc.

Does this have do with Core2Duo processor on my laptop? Also what determines whether they will use 50% or 100%?

share|improve this question

1 Answer 1

Single-threaded applications will use 50%, or one of the cores on the system fully. Multi-threaded apps will use 100%, or both cores.

share|improve this answer
    
I find it hard to believe that firefox would be running on a single thread. –  apoorv020 May 11 '11 at 10:33
4  
You're welcome to pick through the source code. –  Ignacio Vazquez-Abrams May 11 '11 at 10:38
2  
@apoorv020 It may only take a single thread/process to hog a CPU core for the entire application to hang. –  sblair May 11 '11 at 10:42
2  
It would be more accurate to say that if the portion of the program that was using the processing power is single-threaded, it will not use more than 50% CPU on a Dual Core (or 25% on a Quad Core). –  sgmoore May 11 '11 at 10:43

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.