Date: Tue, 9 Sep 1997 18:34:13 +0000 (GMT) From: Terry Lambert <tlambert@primenet.com> To: mal@algonet.se (Mats Lofkvist) Cc: tlambert@primenet.com, current@FreeBSD.ORG Subject: Re: lousy disk perf. under cpu load (was IDE vs SCSI) Message-ID: <199709091834.LAA28493@usr04.primenet.com> In-Reply-To: <199709091225.OAA14331@kairos> from "Mats Lofkvist" at Sep 9, 97 02:25:42 pm
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> But can lack of tagged command queueing explain the combination of good > performance unloaded and bad with one or more cpu bound processes? Yes, I believe so: swapping. But you need to know for sure if it is supported in your version, and I'm not the one to ask. Look at the archives, or wait for Stefan to post. > I have no problem with issues with the 810a affecting devices connected > to it, but is it probable it could affect devices connected to the adaptec? No. The problems were specific to the 810a. > PS How do I find out if tagged queueing is supported? Maybe time > to try -current? Look in the archives or look in the archives to get Stefan's address, and ask him. Or if you CVSup/CTM code, look at the CVS logs. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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