Date: Thu, 30 Jan 1997 14:49:56 -0800 (PST) From: Simon Shapiro <Shimon@i-Connect.Net> To: Tom Samplonius <tom@sdf.com> Cc: hackers@freebsd.org Subject: Re: More 2.2-BETA goodies... Message-ID: <XFMail.970130154550.Shimon@i-Connect.Net> In-Reply-To: <Pine.NEB.3.94.970129035230.18719A-100000@misery.sdf.com>
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This message is in MIME format --_=XFMail.1.1-alpha.p0.FreeBSD:970130150229:7353=_ Content-Type: text/plain; charset=iso-8859-8 Hi Tom Samplonius; On 29-Jan-97 you wrote: > > On Wed, 29 Jan 1997, Simon Shapiro wrote: > > ... > > If there is interest, I can post it. It runs on Slowlaris 2.5.1, linux 2.x > > and FreeBSD 9of courcse). We prefer it to others because it does true > ... > > I'm interested. I've been looking for something to test transactional > limits of SCSI controllers and drives. Problems with tagged command > queuing, etc don't show up until you have a very high number of > transactions per second. > > On an other note, have you tried turning AHC_TAGENABLE and/or > AHC_SCBPAGING_ENABLE on? AHC_TAGENABLE is pretty reliable if your drives > support it. SCSPAGING needs some work yet, I think. Thanx. I am sure many will be interested. I am saving this note myself. We are working, as many of you have learned by now :-) on writing a FreeBSD driver for the DPT controllers as we need some unique features in these (expensive) controllers. I say ``expensive'' as our initial work will only apply to the high-end adapters. Here is st.c, AKA rs.c. (st was known as rs for many, many years. I found /usr/local/bin/rs upon installing FreeBSD. It does something totally different. If this program has any apeal, I can contribute it to the FreeBSD project. How? I know to change the copyright message... Anyway, no man page for now, but basically, you give it a filename to work on, a size is optional. and what kind of a mess you want it to create. A cute addision is that it finds the size of raw partitions very quickly (stat(2) does not) and -S will tell you what it found. It does reads by default, but can do read-modify-write or write-only. Random seek is the default behavior, but you can cause it to seek sequentially. It tries to report ``net'' times. I found that different Unixes report times(2) very differently. Slowlaris, for example, appears to discount (part of?) ``blocked-on-i/o'' time. It misses calendar ``wall clock'' time but ``date;st -....;date'' does the same. There is a million options. see the source and the -h option. It needs no makefile. Just compile it. 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