Date: Tue, 15 Feb 2005 10:29:15 +0000 From: mats.lindberg@se.transport.bombardier.com To: Khairil Yusof <kaeru@jaring.my> Cc: freebsd-questions@freebsd.org Subject: Re: Kernel preemption Message-ID: <OF03DF0FD9.6DEEEC2A-ONC1256FA9.003827F0-C1256FA9.00396F21@UK.BOMBARDIER.TRANSPORT.COM> In-Reply-To: <1108400835.11968.138.camel@wolverine>
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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
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