Date: Fri, 06 Jun 1997 15:45:08 -0600 From: "Justin T. Gibbs" <gibbs@plutotech.com> To: Bob Bishop <rb@gid.co.uk> Cc: "Justin T. Gibbs" <gibbs@plutotech.com>, freebsd-hackers@FreeBSD.ORG Subject: Re: Extremely poor interactive response under heave SCSI load Message-ID: <199706062046.OAA01894@pluto.plutotech.com> In-Reply-To: Your message of "Fri, 06 Jun 1997 21:23:23 BST." <l03020903afbe216182fb@[194.32.164.2]>
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>At 21:34 +0100 6/6/97, Justin T. Gibbs wrote: >>Even better hack. Just send an ordered transaction every once in a while >>which will flush any "starved" simple-tagged transactions. This means that >>you can always keep the queue full. > >Is that [slipping in an ordered transaction when there's a bunch of >unordered transactions 'up the pipe'] actually going to work as desired >for all the controllers of interest? If you don't have a tagged queueing controller/device combination, than the problem you brought up doesn't apply. If you do, the spec mandates that order tags be supported and sending one will have the desired effect. >-- >Bob Bishop (0118) 977 4017 international code +44 118 >rb@gid.co.uk fax (0118) 989 4254 between 0800 and 1800 UK -- Justin T. Gibbs =========================================== FreeBSD: Turning PCs into workstations ===========================================
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