Date: Tue, 3 Oct 2000 21:28:47 +0200 From: Wilko Bulte <wkb@freebie.demon.nl> To: Matthew Jacob <mjacob@feral.com> Cc: FreeBSD-alpha mailing list <freebsd-alpha@FreeBSD.ORG> Subject: Re: max memory on Alpha? Message-ID: <20001003212847.A1868@freebie.demon.nl> In-Reply-To: <Pine.LNX.4.21.0010031156110.12214-100000@zeppo.feral.com>; from mjacob@feral.com on Tue, Oct 03, 2000 at 11:57:55AM -0700 References: <20001003200741.A1318@freebie.demon.nl> <Pine.LNX.4.21.0010031156110.12214-100000@zeppo.feral.com>
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On Tue, Oct 03, 2000 at 11:57:55AM -0700, Matthew Jacob wrote: > On Tue, 3 Oct 2000, Wilko Bulte wrote: > > > What is the currently max supported memory size on Alpha? 2Gb maybe? > > Or will 4Gb also be OK? > > > > Reason for asking is that I want to try a AS8400 who is equipped > > with 3x 4Gb memory module. > > I've run 8400s up to 2GB. Any more than that and you'll find that S/G > DMA hasn't been finished ;-). Well, on 12Gb it panics with pmap_foo <don't remember what foo was off the top of my head> on 4.1-R ;-) Might this mean it cannot create the necessary page table admin on > 2Gb? Do you know *if* there is a hard limit at 2Gb? > Also, haha, you'll find that ECC errors aren't corrected, since TLASER screwed > the pooch wrt ALPHA spec and requires you to run around and fix ECC errors > induced by the I/O boards. Que? This is real UNIX[tm]: expect nothing but flawless hardware (like the error free disk packs on the PDP; worth their weight in gold ;-) > Since I now, for the first time in 4 years, have a real external customer who > actually might run TLAser, I guess I'd better finish this, hadn't I? Well, I'd like to impress a few of the T64 folks. BTW: it has 8 EV5/625 CPUs, so it is a good SMP testbed as well. W/ -- Wilko Bulte wilko@freebsd.org Arnhem, the Netherlands To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-alpha" in the body of the message
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