cvs commit: src/sys/kern kern_subr.c uipc_mbuf.cuipc_syscalls.c src/sys/sys uio.h

[Mike Silbersack]

I tested this patch with apache2, thttpd (with alfred's sendfile patches)
and ftpd; all seemed to work properly.  Please throw whatever other
sendfile using applications you have at it, it'd be best to find bugs
sooner rather than later.

Mike "Silby" Silbersack

On Sat, 31 Jan 2004, Mike Silbersack wrote:

> silby       2004/01/31 23:56:44 PST
>
>   FreeBSD src repository
>
>   Modified files:
>     sys/kern             kern_subr.c uipc_mbuf.c uipc_syscalls.c
>     sys/sys              uio.h
>   Log:
>   Rewrite sendfile's header support so that headers are now sent in the first
>   packet along with data, instead of in their own packet.  When serving files
>   of size (packetsize - headersize) or smaller, this will result in one less
>   packet crossing the network.  Quick testing with thttpd and http_load has
>   shown a noticeable performance improvement in this case (350 vs 330 fetches
>   per second.)
>
>   Included in this commit are two support routines, iov_to_uio, and m_uiotombuf;
>   these routines are used by sendfile to construct the header mbuf chain that
>   will be linked to the rest of the data in the socket buffer.
>
>   Revision  Changes    Path
>   1.80      +42 -0     src/sys/kern/kern_subr.c
>   1.125     +56 -0     src/sys/kern/uipc_mbuf.c
>   1.171     +43 -12    src/sys/kern/uipc_syscalls.c
>   1.31      +3 -0      src/sys/sys/uio.h
>