Date: Mon, 08 Oct 2007 09:58:44 -0700 From: LI Xin <delphij@delphij.net> To: Jeff Kramer <jeffk@well.com> Cc: freebsd-stable@freebsd.org Subject: Re: PAE Slowdown Message-ID: <470A61C4.2090809@delphij.net> In-Reply-To: <p06002004c33006420f72@[192.168.0.5]> References: <p06002004c33006420f72@[192.168.0.5]>
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This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigE9D57AFDA0387050B0ED832F Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Jeff Kramer wrote: > Hey all, >=20 > I know that AMD64's the preferred way to run >4 gig systems, but I'm > having a weird situation with 6.2-RELEASE-p8 and 6-STABLE as of last > night. When I compile the PAE kernel, my system performance drops like= > a rock. It still boots and everything still runs, but for instance, > running the Flops port my megaflops drop from the 950 MFLOPS range to 4= > MFLOPS. It feels about as fast as a 486. >=20 > I'm not sure what I should try disabling. I tried nodevice usb, but > that didn't seem to change anything. SMP and GENERIC kernels work fine= =2E >=20 > CPU: Intel Core Duo 2 Quad 2.4ghz > Memory: 8 gig (4 2 gig dimms) > Swap: 16 gig partition >=20 > If I try to boot without ACPI disabled the kernel doesn't finish > booting, it stops after ata7. Perhaps unrelated, but why don't you run amd64 version? I think PAE is a hack, for instance it does not allow processes to use more than 2GB memory, while AMD64 (called EM64T by Intel implementation) provides much more... Cheers, --=20 Xin LI <delphij@delphij.net> http://www.delphij.net/ FreeBSD - The Power to Serve! --------------enigE9D57AFDA0387050B0ED832F Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHCmHEOfuToMruuMARCoD3AJ4qpirutMaN5fbKuMGWSEpq+03RrQCggv77 FH3ET7KVUDbHPrJurRQYsSo= =PpKo -----END PGP SIGNATURE----- --------------enigE9D57AFDA0387050B0ED832F--
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