[gmpi] Re: Req 76,78

  • From: Tim Hockin <thockin@xxxxxxxxxx>
  • To: gmpi@xxxxxxxxxxxxx
  • Date: Wed, 9 Feb 2005 10:11:23 -0800

On Tue, Feb 08, 2005 at 06:08:40PM +0100, Didier Dambrin wrote:
> >Wait for a reply? Why?
> 
> because your process asked a question to another, it has to wait till the 
> other got its timeslice. While a thread can give the rest of his timeslice, 
> if a process could do that, why would windows switch to the target one? 
> There might be other processes running, and they're not less important than 
> yours.

Any OS student knows the answers to this:
 a) Most other processes are blocked at any given time
 b) Interactive or foreground tasks get a priority boost
 c) Tasks that voluntarily block get a priority boost, and still keep
    the rest of their slice
 d) When you "send" to another process you signal it to wake up, so you
    have a very high chance of that running next.

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