From owner-freebsd-current  Sat Dec 22  2:25:25 2001
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Date: Sat, 22 Dec 2001 21:25:16 +1100 (EST)
From: Bruce Evans <bde@zeta.org.au>
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To: Luigi Rizzo <rizzo@aciri.org>
Cc: John Baldwin <jhb@FreeBSD.org>, <current@FreeBSD.org>,
	Peter Wemm <peter@wemm.org>
Subject: Re: vm_zeropage priority problems.
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On Sat, 22 Dec 2001, Luigi Rizzo wrote:

> On Sat, Dec 22, 2001 at 06:48:26PM +1100, Bruce Evans wrote:
> > Most of the changes here are to fix style bugs.  In the NEW_SCHED case,
> > the relative weights for each priority are determined by the niceweights[]
> > table.  kg->kg_estcpu is limited only by INT_MAX and priorities are
> > assigned according to relative values of kg->kg_estcpu (code for this is
> > not shown).
>
> i guess the latter is the hard part... what kind of complexity does
> it have ?

Not too bad.  I use an extra loop in schedcpu() to find the current maximum
of all kg->kg_estcpu, and convert the divison by this maximum (for scaling
individual kg->kg_estcpu's) to a multiplication and a shift.  This can
probably be done better in loadav().

Bruce


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