Date: Sun, 21 May 2006 14:00:03 -0400 From: Kris Kennaway <kris@obsecurity.org> To: Dmitry Pryanishnikov <dmitry@atlantis.dp.ua> Cc: Brett Glass <brett@lariat.org>, stable@freebsd.org, Colin Percival <cperciva@freebsd.org> Subject: Re: 4.11 snapshots? Message-ID: <20060521180003.GA59697@xor.obsecurity.org> In-Reply-To: <20060517130629.T64952@atlantis.atlantis.dp.ua> References: <200605160135.TAA04838@lariat.net> <57d710000605151942p2461338au561269fc5937aee7@mail.gmail.com> <7.0.1.0.2.20060515225038.08d72690@lariat.org> <446981CD.5000309@gmail.com> <4469C668.2060807@rerowe.com> <7.0.1.0.2.20060516104907.08788ad8@lariat.org> <446A0608.10608@freebsd.org> <20060517130629.T64952@atlantis.atlantis.dp.ua>
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--Qxx1br4bt0+wmkIi Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, May 17, 2006 at 01:22:59PM +0300, Dmitry Pryanishnikov wrote: >=20 > Hello! >=20 > On Tue, 16 May 2006, Colin Percival wrote: > >Personally, since FreeBSD 4.11 will reach its EoL about 8 months > >from now, and the 4.x->[56].x upgrade path is non-trivial, I > >recommend installing FreeBSD 6.1 instead. >=20 > Well, have you seen my simple performance benchmarking RELENG_4 vs 6? > IMHO it mimics quote common usage pattern: it just downloads a large file > with 10Mbps rate and stores it on UFS filesystem. On the same hardware > (i386 uniprocessor Celeron-333 system with 128Mb RAM and fast SAMSUNG=20 > SP0802N > HDD using UDMA33) under the same conditions, using more optimal config=20 > (INVARIANTS removed) RELENG_6 (and 5) _still_ uses >=3D 50% of CPU time > for (Intr+Sys), while RELENG_4 doesn't use more than 28% for them. So > (unless this performance difference will be minimized) I predict _a lot_ > of requests to extend RELENG_4 support further, because people just could= n't > afford 4->6 upgrade due to a loss of performance. This is a network+filesystem benchmark, and it's probably the "network" part that is using extra CPU, not the "filesystem" part. But until you run those profiling tests we can't be sure. Kris --Qxx1br4bt0+wmkIi Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.3 (FreeBSD) iD8DBQFEcKqjWry0BWjoQKURAjYiAKCvzrsiNOg4VZM4rI9Dm45NRqelVACeLugN az7M25fmLKt6v3cD7rRbkV0= =HXQa -----END PGP SIGNATURE----- --Qxx1br4bt0+wmkIi--
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