From owner-cvs-all  Thu Nov  5 10:04:41 1998
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To: dag-erli@ifi.uio.no (Dag-Erling C. =?iso-8859-1?Q?Sm=F8rgrav?= )
cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG
Subject: Re: cvs commit: src/sys/conf options param.c src/sys/kern init_sysent.c syscalls.c syscalls.master uipc_syscalls.c src/sys/sys mbuf.h socket.h socketvar.h syscall-hide.h syscall.h syscall.mk sysproto.h src/sys/vm vm_object.c 
In-reply-to: Your message of "05 Nov 1998 18:17:12 +0100."
             <xzp7lxaxdnr.fsf@hrotti.ifi.uio.no> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Thu, 05 Nov 1998 10:05:40 -0800
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>David Greenman <dg@FreeBSD.ORG> writes:
>>   Implemented zero-copy TCP/IP extensions via sendfile(2) - send a
>>   file to a stream socket. sendfile(2) is similar to implementations in
>>   HP-UX, Linux, and other systems, but the API is more extensive and
>>   addresses many of the complaints that the Apache Group and others have
>>   had with those other implementations. Thanks to Marc Slemko of the
>>   Apache Group for helping me work out the best API for this.
>>   Anyway, this has the "net" result of speeding up sends of files over
>>   TCP/IP sockets by about 10X (that is to say, uses 1/10th of the CPU
>>   cycles) when compared to a traditional read/write loop.
>
>Huzzah!
>
>Are you planning to rewrite FreeBSD's ftpd to use sendfile(2)? If not,
>mind if I do? :)

   Yes, I'm running the code on wcarchive and that part of dg-ftpd was similar
to the standard BSD code...so the changes have more or less already been
made - I just need to retrofit them.

-DG

David Greenman
Co-founder/Principal Architect, The FreeBSD Project

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