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From: Rob Landley <landley@trommello.org>
To: David Schwartz <davids@webmaster.com>, <mgix@mgix.com>,
       <root@chaos.analogic.com>, Chris Friesen <cfriesen@nortelnetworks.com>
Subject: Re: Question about sched_yield()
Date: Tue, 18 Jun 2002 12:58:09 -0400
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On Tuesday 18 June 2002 03:11 pm, David Schwartz wrote:

> 	I'm sorry, but you are being entirely unreasonable. The kernel has no way
> to know which processes are doing something useful and which ones are just
> wasting CPU.

So the fact one of them is calling sched_yield (repeatedly) and the other one 
isn't doesn't count as just a little BIT of a hint?

> 	What sched_yield is good for is if you encounter a situation where you
> need/want some resource and another thread/process has it. You call
> sched_yield once, and maybe when you run again, the other thread/process
> will have released it.

Not if it was a higher-priority task that has already exhausted its time 
slice...

> You can also use it as the spin function in
> spinlocks.

In user space?

Rob
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