Date: Sat, 8 Dec 2012 23:04:33 -0500 From: Alexander Kabaev <kabaev@gmail.com> To: "Ronald F. Guilmette" <rfg@tristatelogic.com> Cc: freebsd-hackers@freebsd.org Subject: Re: FreeBSD for serious performance? (was: Re: 9.x -- New Install -- serious partition misalignment) Message-ID: <20121208230433.2c54f44a@kan.dyndns.org> In-Reply-To: <1830.1355025154@tristatelogic.com> References: <20121209014547.238070@gmx.com> <1830.1355025154@tristatelogic.com>
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--Sig_/fPOp/Lv6L2AbPx+pizu/K++ Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Sat, 08 Dec 2012 19:52:34 -0800 "Ronald F. Guilmette" <rfg@tristatelogic.com> wrote: "analysis" skipped. >=20 > As regards to the Native Command Queuing.... all I can say is "Crap!" > I wasn't aware...until now... that FreeBSD did not support that. That > really is a rather entirely serious issue. But I do think that the > performance hit from that would be dwarfed by the performance hit that > could be caused by the AF misaligment problem. >=20 ada0 at ahcich1 bus 0 scbus2 target 0 lun 0 ada0: <ST3750330AS SD1A> ATA-8 SATA 2.x device ada0: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada0: Command Queueing enabled ada0: 715404MB (1465149168 512 byte sectors: 16H 63S/T 16383C) ada0: Previously was known as ad0 ada1 at ahcich3 bus 0 scbus4 target 0 lun 0 ada1: <ST3750330AS SD1A> ATA-8 SATA 2.x device ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes) ada1: Command Queueing enabled ada1: 715404MB (1465149168 512 byte sectors: 16H 63S/T 16383C) Crap! I must be dreaming then. --=20 Alexander Kabaev --Sig_/fPOp/Lv6L2AbPx+pizu/K++ Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (FreeBSD) iD8DBQFQxA3WQ6z1jMm+XZYRAseaAKDPlHKCrzVgKx/UbDTwwg7g5cajWACfYiXf 0YQzgKzM9RPluTHpUHWZooo= =/66g -----END PGP SIGNATURE----- --Sig_/fPOp/Lv6L2AbPx+pizu/K++--
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