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Date:      Tue, 15 Mar 2011 23:31:10 +0200
From:      Kostik Belousov <kostikbel@gmail.com>
To:        Jung-uk Kim <jkim@freebsd.org>
Cc:        svn-src-head@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, Bruce Evans <brde@optusnet.com.au>, John Baldwin <jhb@freebsd.org>
Subject:   Re: svn commit: r219646 - head/sys/x86/isa
Message-ID:  <20110315213110.GM78089@deviant.kiev.zoral.com.ua>
In-Reply-To: <201103151721.42664.jkim@FreeBSD.org>
References:  <201103142205.p2EM5x6E012664@svn.freebsd.org> <201103151526.14264.jkim@FreeBSD.org> <201103151551.54196.jhb@freebsd.org> <201103151721.42664.jkim@FreeBSD.org>

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On Tue, Mar 15, 2011 at 05:21:34PM -0400, Jung-uk Kim wrote:
> However, why do we need cheaper DELAY() when we trying to "delay"=20
> something with it?
Busy-loop performing repeated access to the south bridge eats the
bus capacity, that could be useful for other bus agent and other cores.
I think this is the case with HPET, while TSC is core-local.

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