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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--VBPz+4ZpWFKX9Cmp Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable 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. --VBPz+4ZpWFKX9Cmp Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (FreeBSD) iEYEARECAAYFAk1/2p4ACgkQC3+MBN1Mb4is3QCgmBXPYx4yA89Z/yWWBj3r37xE YOcAoIx7l8tJVRDFgnehaTa/ukDAm6Lj =Qmcu -----END PGP SIGNATURE----- --VBPz+4ZpWFKX9Cmp--
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