Date: Tue, 20 Apr 2004 14:59:44 -0700 From: Kris Kennaway <kris@obsecurity.org> To: Tom <tom@sdf.com> Cc: Kris Kennaway <kris@obsecurity.org> Subject: Re: HTT and SMP question Message-ID: <20040420215944.GB67800@xor.obsecurity.org> In-Reply-To: <20040420102137.Q97493@light.sdf.com> References: <20040419085841.GB64662@freenix.no> <20040419090049.GA51659@chihiro.leafy.idv.tw> <20040419092052.GD64662@freenix.no> <20040419093523.GA34419@xor.obsecurity.org> <20040420073837.GS32493@e-card.bg> <20040420081334.GA56291@xor.obsecurity.org> <20040420102137.Q97493@light.sdf.com>
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--dc+cDN39EJAMEtIO Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Tue, Apr 20, 2004 at 10:30:05AM -0700, Tom wrote: > > My parallel package builds are slower on build machines with HTT. > > It's not a magic bullet. > There are also FreeBSD factors: FreeBSD 4 compiled with SMP, avoids a > lot of locking code. FreeBSD 4 with SMP has a lot of extra locking code, > and that code has cost associated with it. The cost of SMP locking in > FreeBSD 4, may out way the benefit of HTT. With FreeBSD 5, the SMP > locking is done quite differently, and it is done all the time anyhow > (since FreeBSD 5 is SMP by default). So HTT on FreeBSD 5 is more likely > to be beneficial than HTT on FreeBSD 4 (with a non SMP kernel). I was talking about FreeBSD 5 :-) Kris --dc+cDN39EJAMEtIO Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (FreeBSD) iD8DBQFAhZ1PWry0BWjoQKURAgA3AJ96Ym4kJV16m/g8fZ8rQor/Wp/4oQCfcdDM gnE6OSmmB2Y26mKa7hGeey4= =8AEP -----END PGP SIGNATURE----- --dc+cDN39EJAMEtIO--
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