Date: Sun, 21 Mar 1999 18:00:25 -0800 From: Mike Smith <mike@smith.net.au> To: Dennis <dennis@etinc.com> Cc: Amancio Hasty <hasty@rah.star-gate.com>, hackers@freebsd.org Subject: Re: Gigabit ethernet -- what am I doing wrong? Message-ID: <199903220200.SAA02330@dingo.cdrom.com> In-Reply-To: Your message of "Sun, 21 Mar 1999 20:10:21 EST." <199903220058.TAA17538@etinc.com>
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> At 12:13 PM 3/21/99 -0800, you wrote: > > > >Hmm.... > >Does anyone know when the faster PCI busses (64bits or 66MHz PCI clock rate) > >are going to be availabe ? > > The "availability" of 66Mhz busses is almost moot. Making ASICs work at 33mhz > is a chore....66mhz is a waze off. That's close, but several of the major ASIC vendors were (or were claiming to be) sampling devices with 66MHz PCI macrocells the last time I looked. > And as far a 64 bit busses.....there > arent many > processors that can do is, and doubling the bandwidth on a 32bit processor > isnt > always linear in performance. You have to get a whole new generation of > processors before you will see any usable products. This has nothing whatever to do with reality, however. Most PCI peripherals are bus masters, and most memory busses these days are at least 64 bits wide, so 64 bit PCI has very real performance benefits. The processor's internal word size has little or nothing to do with the equation. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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