Date: Tue, 17 Feb 2009 08:57:42 +0100 From: Luigi Rizzo <rizzo@iet.unipi.it> To: Scott Long <scottl@samsco.org> Cc: freebsd-current@freebsd.org, freebsd-stable@freebsd.org, Ivan Voras <ivoras@freebsd.org> Subject: Re: HEADS UP: Major CAM performance regression Message-ID: <20090217075742.GA69308@onelab2.iet.unipi.it> In-Reply-To: <4996D635.3000802@samsco.org> References: <499551B9.7050805@samsco.org> <gn3ssi$j1r$1@ger.gmane.org> <4995DFE5.1020205@samsco.org> <9bbcef730902131421r53efa13dq371658888747f387@mail.gmail.com> <4996D635.3000802@samsco.org>
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On Sat, Feb 14, 2009 at 07:33:25AM -0700, Scott Long wrote: ... > >I'll try your suggestion if you have one. > > I don't have a magic universal testing suite in my back pocket, sorry. > You need to look at your expected workload and develop tests to simulate > it. When I do testing during driver development, I try a lot of > different parallel, sequential, large i/o, and small i/o combinations. i just committed a port sysutils/fio that perhaps can help testing IO performance with various patterns. cheers luigi
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