Date: Wed, 25 Apr 2007 10:02:24 +0200 From: Ivan Voras <ivoras@fer.hr> To: freebsd-questions@freebsd.org Subject: Re: Memory >3.5GB not used? Message-ID: <f0n1ug$5p1$1@sea.gmane.org> In-Reply-To: <20070424182027.33d16b28.wmoran@potentialtech.com> References: <01d301c78699$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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[-- Attachment #1 --] Bill Moran wrote: > Does this test demonstrate usage of memory over 4G? It's my understanding > that PAE starts to suffer when it has to look at the memory over 4G (which > is the problem it's intended to solve) > > If your entire test fits in under 4G, you're not seeing the worst of it. > At least, that's my understanding of the issue. I don't think that's how PAE works. AFAIK, it adds all the memory pages it can find (including those above and below 4 GB) into the VM pool with 64-bit addresses, so all of them can be used by the applications in an uniform way. Kind of like swap works. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iD8DBQFGLwsQldnAQVacBcgRAkHCAJwPhfKrew9dwxhRR5mboQg7WZ+FhQCbB8Cf 9JW7h7kdnBDCBkVwqmYeJpg= =ZWJk -----END PGP SIGNATURE-----
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