Date: Sun, 14 Sep 1997 21:30:39 -0700 From: "Michael L. VanLoon -- HeadCandy.com" <michaelv@MindBender.serv.net> To: "John S. Dyson" <toor@dyson.iquest.net> Cc: tm@blom.co.id, current@freebsd.org Subject: Re: FYI: Interesting IDE-Ultra/33 results Message-ID: <199709150430.VAA04430@MindBender.serv.net> In-Reply-To: Your message of Sun, 14 Sep 97 22:49:07 -0500. <199709150349.WAA00530@dyson.iquest.net>
next in thread | previous in thread | raw e-mail | index | archive | help
[...] >For those who might try to blow off the transfer rate issue, >remember that slow transfers can add to the latency of a I/O >transfer request. The faster the transfer rate from the drive, the >shorter the channel will be busy, and the quicker the total >response time can be. As I commented on earlier though, my [...] However, there's more than one way to minimize command overhead. Which is why tagged-command-queuing is so important for SCSI performance, allowing multiple commands to be queued with minimal additional overhead. I'm not minimizing the results above -- they are impressive. However, I don't think that particular command overhead test completely accounts for all the subtleties of this issue. ----------------------------------------------------------------------------- Michael L. VanLoon michaelv@MindBender.serv.net Contract software development for Windows NT, Windows 95 and Unix. Windows NT and Unix server development in C++ and C. --< Free your mind and your machine -- NetBSD free un*x >-- NetBSD working ports: 386+PC, Mac 68k, Amiga, Atari 68k, HP300, Sun3, Sun4/4c/4m, DEC MIPS, DEC Alpha, PC532, VAX, MVME68k, arm32... NetBSD ports in progress: PICA, others... -----------------------------------------------------------------------------
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199709150430.VAA04430>