linux-kernel - Re: [RFC 4/4] Documentation/scheduler/sched-deadline.txt: add some references

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Message-ID: <20150409094427.GR5029@twins.programming.kicks-ass.net>
Date:	Thu, 9 Apr 2015 11:44:27 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Henrik Austad <henrik@...tad.us>
Cc:	Luca Abeni <lucabe72@...il.com>, juri.lelli@...il.com,
	raistlin@...ux.it, mingo@...nel.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org, Luca Abeni <luca.abeni@...tn.it>
Subject: Re: [RFC 4/4] Documentation/scheduler/sched-deadline.txt: add some
 references

On Thu, Apr 09, 2015 at 11:39:08AM +0200, Henrik Austad wrote:
> > + CPUs, with the first M - 1 tasks having a small worst case execution time
> > + WCET_i=e and period equal to relative deadline P_i=D_i=P-1. The last task
> 
> Normally, 'e' is used to denote an _arbitrarily_ small value, and I suspect 
> that this is indeed the case here as well (you're going to describe 
> Dhall's effect, right?). Perhaps make that point explicit?
> 
>      T_i = {P_i, e, P_i}

We're talking about \epsilon here, right? Is it customary to use a
regular 'e' in CS literature for that?

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