Date: Wed, 16 Mar 2011 12:59:46 -0700 From: Garrett Cooper <gcooper@FreeBSD.org> To: Ivan Voras <ivoras@freebsd.org> Cc: svn-src-head@freebsd.org, Roman Divacky <rdivacky@freebsd.org>, src-committers@freebsd.org, svn-src-all@freebsd.org Subject: Re: svn commit: r219699 - head/sys/kern Message-ID: <AANLkTiny%2Bgzdtc078Wm_dHC9AsNG_xMGeLkz_5U8iu8g@mail.gmail.com> In-Reply-To: <AANLkTika25WRx=TWJXeNg_2786U11ff7_O68DkBz1oKc@mail.gmail.com> References: <201103161622.p2GGMxNp097642@svn.freebsd.org> <20110316174642.GB6367@freebsd.org> <AANLkTika25WRx=TWJXeNg_2786U11ff7_O68DkBz1oKc@mail.gmail.com>
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On Wed, Mar 16, 2011 at 12:51 PM, Ivan Voras <ivoras@freebsd.org> wrote: > On 16 March 2011 18:46, Roman Divacky <rdivacky@freebsd.org> wrote: >> >> On Wed, Mar 16, 2011 at 04:22:59PM +0000, Ivan Voras wrote: >> > Author: ivoras >> > Date: Wed Mar 16 16:22:59 2011 >> > New Revision: 219699 >> > URL: http://svn.freebsd.org/changeset/base/219699 >> > >> > Log: >> > =A0 The hardware has caught up; improvements are now observed even at = 128, >> > =A0 but stay conservative and bump read_max to "only" 64 (it will prob= ably be >> > =A0 a good idea to increase this to 128 after the next major release). >> >> how did you measure this? > > Specifically for this commit: my desktop 2xSATA 7200 RPM drives, > gmirror, single read "dd" stream, bs=3D1m. (Are there any ready read > multi-stream read tests which are not trivial i.e. they start from > different positions in the file?) Would be interesting to see how well things work with the new geom_raid bits and with other drives (SAS, SCSI). Thanks, -Garrett
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