Date: Mon, 5 Apr 1999 17:46:15 -0700 (PDT) From: <unknown@riverstyx.net> To: Darren Pilgrim <dpilgrim@uswest.net> Cc: Mark Ovens <marko@uk.radan.com>, Greg Lehey <grog@lemis.com>, Leif Neland <leif@neland.dk>, FreeBSD Questions <questions@FreeBSD.ORG> Subject: Re: K6-2/333, was: Re: Debug kernel by default (was: System sizewith -g) Message-ID: <Pine.LNX.4.04.9904051744500.31071-100000@hades.riverstyx.net> In-Reply-To: <3709569A.70EEC38A@uswest.net>
next in thread | previous in thread | raw e-mail | index | archive | help
I've seen good speed gains by moving to a 100MHz bus, although this was for servers that were doing a lot of database work and heavy network traffic. Perhaps it wouldn't matter much for servers doing more calculation-intensive work? --- tani hosokawa river styx internet On Mon, 5 Apr 1999, Darren Pilgrim wrote: > unknown@riverstyx.net wrote: > > I may be out to lunch on this one, but I'm pretty sure that the multiplier > > is for the internal clock of the chip. So, if, after applying the > > multiplier to one chip you get 300MHz, and after applying a different > > multiplier to a different chip with a different bus speed you also get > > 300MHz, you get two chips that perform the exact same number of > > operations/sec. The difference is the bus speed, which affects I/O > > performance, etc. A 100 MHz bus with a x3 multiplier will outperform a 66 > > MHz bus with a x4.5 multiplier because the CPU will have to wait more > > often when it wants to fetch non-cached data from RAM. > > While this is mathematically and theoretically sound thinking, tests > have shown that there is little CPU/memory performance gain with a > 100MHz bus. Just take a look at www.tomshardware.com. As for my own > systems, I run K6-2 333s at 5x66 just because it sets the PCI and AGP > clocks at their spec'd rate of 33 and 66MHz, respectively, while > providing the CPU's spec'd 333MHz. > > -- > dpilgrim@uswest.net /\ / __ Our lies are merely the > gryph@mindless.com / \/OC/URNE truth of another world > ICQ: 29880099 Death is not a kill -9, just a > DALnet: anim0s make world and shutdown -r now PGPKey available > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.4.04.9904051744500.31071-100000>