Groups > comp.os.linux.networking > #1518

Re: scatter/gather test

From	Noob <root@127.0.0.1>
Newsgroups	comp.os.linux.networking
Subject	Re: scatter/gather test
Date	2012-07-18 12:08 +0200
Organization	A noiseless patient Spider
Message-ID	<ju61ug$e5e$1@dont-email.me> (permalink)
References	<1e1274bf-aabe-48d3-b1cc-2fbcea2fc9c9@googlegroups.com> <ju4j27$lks$1@usenet01.boi.hp.com> <bd62df23-6ea9-4ed2-9781-f368c58ff97a@googlegroups.com>

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wkevin wrote:

> Any ideas? did anybody had success with testing scatter/gather?

Have you tried coalescing multiple disjoint buffers using sendmsg?
(sendmsg is the text-book API for user-space scatter/gather.)

http://pubs.opengroup.org/onlinepubs/9699919799/functions/sendmsg.html
http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_socket.h.html

ssize_t sendmsg(int socket, const struct msghdr *message, int flags);

The msghdr structure shall include at least the following members:

void          *msg_name        Optional address.
socklen_t      msg_namelen     Size of address.
struct iovec  *msg_iov         Scatter/gather array.
int            msg_iovlen      Members in msg_iov.
void          *msg_control     Ancillary data; see below.
socklen_t      msg_controllen  Ancillary data buffer len.
int            msg_flags       Flags on received message.

Regards.

Thread

scatter/gather test wkevin <wkevils@gmail.com> - 2012-07-17 11:37 -0700
  Re: scatter/gather test Rick Jones <rick.jones2@hp.com> - 2012-07-17 20:48 +0000
    Re: scatter/gather test wkevin <wkevils@gmail.com> - 2012-07-17 23:21 -0700
      Re: scatter/gather test Noob <root@127.0.0.1> - 2012-07-18 12:08 +0200
        Re: scatter/gather test wkevin <wkevils@gmail.com> - 2012-07-18 05:18 -0700
          Re: scatter/gather test Noob <root@127.0.0.1> - 2012-07-18 15:38 +0200
          Re: scatter/gather test Jorgen Grahn <grahn+nntp@snipabacken.se> - 2012-07-18 14:48 +0000
        Re: scatter/gather test wkevin <wkevils@gmail.com> - 2012-07-18 05:14 -0700
      Re: scatter/gather test Rick Jones <rick.jones2@hp.com> - 2012-07-18 18:55 +0000

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