From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <440466C6.9050706@domain.hid> Date: Tue, 28 Feb 2006 16:05:42 +0100 From: Jan Kiszka MIME-Version: 1.0 Subject: Re: [Xenomai-help] Page faults References: In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig31C30E1965A9151868DB0EC3" Sender: jan.kiszka@domain.hid List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jeroen Van den Keybus Cc: "xenomai@xenomai.org" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig31C30E1965A9151868DB0EC3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Jeroen Van den Keybus wrote: > I'm observing a considerable amount of Page Faults (5090 after an hour = or > so), each one associated with a MSW increase in /proc/xenomai/stat. I'm= > missing RT deadlines on those occasions and I want to fix it, so I woul= d > like to know what Page Faults actually are. >=20 Maybe not all of your user memory is cleanly locked and got swapped out (swapping activated?). If you don't see kernel oopses and your programs don't receive segfaults, these faults are references to swapped out or not yet mapped in pages. BTW, what does the kernel console tell you? The deadline misses as a result are "normal": your RT thread gets switched to secondary mode to handle the fault, and handling it may take some time... Jan --------------enig31C30E1965A9151868DB0EC3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEBGbGniDOoMHTA+kRAgcRAJ951EddOnJwCnziQaZi/IvtY+GnhACeMKXK MouewEvQEtffynZUhSI1guI= =iRtS -----END PGP SIGNATURE----- --------------enig31C30E1965A9151868DB0EC3--