Date: Wed, 25 Apr 2007 02:21:34 +0200 From: Solon Luigi Lutz <solon@pyro.de> To: freebsd-questions@freebsd.org Subject: Re[2]: Memory >3.5GB not used? Message-ID: <488507560.20070425022134@pyro.de> In-Reply-To: <20070424182027.33d16b28.wmoran@potentialtech.com> References: <01d301c78699$d6a36820$0300020a@mickey> <20070424140528.95287ff4.wmoran@potentialtech.com> <021201c7869f$ee90fd70$0300020a@mickey> <3ee9ca710704241144n4ab349c6m901586e427b1ae0d@mail.gmail.com> <021c01c786a0$fe7e5510$0300020a@mickey> <20070424145433.734761db.wmoran@potentialtech.com> <f0lrup$18a$1@sea.gmane.org> <20070424182027.33d16b28.wmoran@potentialtech.com>
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Hello Bill, Wednesday, April 25, 2007, 12:20:27 AM, you wrote: >> > >> > Not all modules work with PAE. Read the example PAE kernel file for >> > information. >> > >> > PAE is an awful hack, BTW. I've heard a number of people complain that >> > performance sucks under PAE. >> BM> Does this test demonstrate usage of memory over 4G? It's my understanding BM> that PAE starts to suffer when it has to look at the memory over 4G (which BM> is the problem it's intended to solve) BM> If your entire test fits in under 4G, you're not seeing the worst of it. BM> At least, that's my understanding of the issue. Don't mind - since you don't want to use PAE. There are a bunch of devices, namely network cards, who will cease to work properly on a SMP PAE kernel. Get a AMD64 motherboard or limit the amount of PCI cards to the absolute minimum; depending on how many/what cards you have installed, they allocate more or less memory out of the possible 4 GB PCI mem-space. Best regards, Solon Lutz +-----------------------------------------------+ | PyroDesign Berlin - Creativity for tomorrow | | Wasgenstrasse 75/13 - 14129 Berlin, Germany | | www.pyro.de - phone + 49 - 30 - 48 48 58 58 | | info@pyro.de - fax + 49 - 30 - 80 94 03 52 | +-----------------------------------------------+ mailto:solon@pyro.de
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