From owner-freebsd-questions@FreeBSD.ORG Tue Feb 15 10:27:11 2005 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id AC2FD16A4CE for ; Tue, 15 Feb 2005 10:27:11 +0000 (GMT) Received: from demas002.adtranz.com (demas002.adtranz.com [213.68.98.31]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4B4D943D5F for ; Tue, 15 Feb 2005 10:27:08 +0000 (GMT) (envelope-from mats.lindberg@se.transport.bombardier.com) Received: from EMEAML02.UK.BOMBARDIER.TRANSPORT.COM (emea-ml02 [10.157.248.22]) by demas002.adtranz.com (8.12.9/8.12.9) with ESMTP id j1FANY3X001464; Tue, 15 Feb 2005 11:23:35 +0100 (MET) In-Reply-To: <1108400835.11968.138.camel@wolverine> To: Khairil Yusof MIME-Version: 1.0 X-Mailer: Lotus Notes Release 6.0 September 26, 2002 From: mats.lindberg@se.transport.bombardier.com Message-ID: Date: Tue, 15 Feb 2005 10:29:15 +0000 X-MIMETrack: Serialize by Router on EMEA-ML02/Server/Transport/Bombardier(Release 6.0.3|September 18, 2003) at 02/15/2005 10:29:17, Serialize complete at 02/15/2005 10:29:17 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.1 cc: freebsd-questions@freebsd.org Subject: Re: Kernel preemption X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Feb 2005 10:27:11 -0000 I've compiled the kernel with=20 options PREEMTION I've tried rtprio I've tried sched=5Fsetscheduler(...scheduler=3DFIFO, priority=3D31...); Swapping is turned off. I still get 250ms pausing in the tcp comm. Maybe it is the stack?! Is it=20 losing frames perhaps? Any good ideas what to look for - someone. Regarding the HZ - My application never uses the cpu for more than 1ms or = so before it blocks. So that should not be tha case. There are not many other processes and I have none of them running at an=20 elevated priority/scheduler scheme. =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20 This e-mail communication (and any attachment/s) may contain confidential=20 or privileged information and is intended only for the individual(s) or=20 entity named above and to others who have been specifically authorized to=20 receive it. If you are not the intended recipient, please do not read,=20 copy, use or disclose the contents of this communication to others. Please = notify the sender that you have received this e-mail in error by reply=20 e-mail, and delete the e-mail subsequently.=20 Thank you.=20 =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20 Ce message (ainsi que le(s) fichier/s), transmis par courriel, peut=20 contenir des renseignements confidentiels ou prot=E9g=E9s et est destin=E9 = =E0=20 l?usage exclusif du destinataire ci-dessus. Toute autre personne est par=20 les pr=E9sentes avis=E9e qu?il est strictement interdit de le diffuser, le = distribuer ou le reproduire. Si vous l?avez re=E7u par inadvertance,=20 veuillez nous en aviser et d=E9truire ce message.=20 Merci.=20 =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20 =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20 This e-mail communication (and any attachment/s) may contain confidential=20 or privileged information and is intended only for the individual(s) or=20 entity named above and to others who have been specifically authorized to=20 receive it. If you are not the intended recipient, please do not read,=20 copy, use or disclose the contents of this communication to others. Please = notify the sender that you have received this e-mail in error by reply=20 e-mail, and delete the e-mail subsequently.=20 Thank you.=20 =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20 Ce message (ainsi que le(s) fichier/s), transmis par courriel, peut=20 contenir des renseignements confidentiels ou prot=E9g=E9s et est destin=E9 = =E0=20 l?usage exclusif du destinataire ci-dessus. Toute autre personne est par=20 les pr=E9sentes avis=E9e qu?il est strictement interdit de le diffuser, le = distribuer ou le reproduire. Si vous l?avez re=E7u par inadvertance,=20 veuillez nous en aviser et d=E9truire ce message.=20 Merci.=20 =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F= =5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=5F=20