Are you calling tcp_poll? If so, what
interval are you using?
Larry Piggins
address@hidden
248-596-3343
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11/04/2003 09:14 PM
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Subject
[lwip-users] why my tcp so
slow
I use lwip 0.6.4.
The udp run very well about 500KB/s,but the tcp will block soon after a
transmission,about one minitute after it can
continue transmit serval seconds and then block again.
I do not know if my config is correct,the my lwipopts.h is as bellow.
Who can help me?
Thank you very much!
//my lwipopts.h
/*
* Copyright (c) 2001, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer
in the
* documentation and/or other materials provided with the
distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from
this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS''
AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS
BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF
* SUCH DAMAGE.
*
* This file is part of the lwIP TCP/IP stack.
*
* Author: Adam Dunkels <address@hidden>
*
* $Id: lwipopts.h,v 1.1.1.1 2003/05/17 05:06:57 chenyu Exp $
*/
#ifndef __LWIPOPTS_H__
#define __LWIPOPTS_H__
#include "common.h"
#define DBG_TYPES_ON (DBG_ON|DBG_TRACE|DBG_STATE|DBG_FRESH|DBG_HALT)
/* ---------- Memory options ---------- */
/* MEM_ALIGNMENT: should be set to the alignment of the CPU for which
lwIP is compiled. 4 byte alignment -> define MEM_ALIGNMENT to
4, 2
byte alignment -> define MEM_ALIGNMENT to 2. */
//yangye 2003-1-27
#define MEM_ALIGNMENT 4
/* MEM_SIZE: the size of the heap memory. If the application will send
a lot of data that needs to be copied, this should be set high. */
#define MEM_SIZE 10240
/* MEMP_NUM_PBUF: the number of memp struct pbufs. If the application
sends a lot of data out of ROM (or other static memory), this
should be set high. */
#define MEMP_NUM_PBUF MY_MAX_TASKS
/* MEMP_NUM_UDP_PCB: the number of UDP protocol control blocks. One
per active UDP "connection". */
#define MEMP_NUM_UDP_PCB MY_MAX_TASKS
/* MEMP_NUM_TCP_PCB: the number of simulatenously active TCP
connections. */
#define MEMP_NUM_TCP_PCB MY_MAX_TASKS
/* MEMP_NUM_TCP_PCB_LISTEN: the number of listening TCP
connections. */
#define MEMP_NUM_TCP_PCB_LISTEN MY_MAX_TASKS
/* MEMP_NUM_TCP_SEG: the number of simultaneously queued TCP
segments. */
#define MEMP_NUM_TCP_SEG MY_MAX_TASKS*4
/* MEMP_NUM_SYS_TIMEOUT: the number of simulateously active
timeouts. */
#define MEMP_NUM_SYS_TIMEOUT MY_MAX_TASKS
/* The following four are used only with the sequential API and can be
set to 0 if the application only will use the raw API. */
/* MEMP_NUM_NETBUF: the number of struct netbufs. */
#define MEMP_NUM_NETBUF MY_MAX_TASKS*2
/* MEMP_NUM_NETCONN: the number of struct netconns. */
#define MEMP_NUM_NETCONN MY_MAX_TASKS
/* MEMP_NUM_APIMSG: the number of struct api_msg, used for
communication between the TCP/IP stack and the sequential
programs. */
#define MEMP_NUM_API_MSG MY_MAX_TASKS
/* MEMP_NUM_TCPIPMSG: the number of struct tcpip_msg, which is used
for sequential API communication and incoming packets. Used in
src/api/tcpip.c. */
#define MEMP_NUM_TCPIP_MSG 100
/* ---------- Pbuf options ---------- */
/* PBUF_POOL_SIZE: the number of buffers in the pbuf pool. */
//yangye 2003-1-22
//seems there is something wrong when PBUF_POOL_SIZE = 6
#define PBUF_POOL_SIZE 256
/* PBUF_POOL_BUFSIZE: the size of each pbuf in the pbuf pool. */
#define PBUF_POOL_BUFSIZE 256
/* PBUF_LINK_HLEN: the number of bytes that should be allocated for a
link level header. */
#define PBUF_LINK_HLEN 16
/* Controls if TCP should queue segments that arrive out of
order. Define to 0 if your device is low on memory. */
#define TCP_QUEUE_OOSEQ 1
/* TCP Maximum segment size. */
#define TCP_MSS
512
/* TCP sender buffer space (bytes). */
#define TCP_SND_BUF 1024
/* TCP sender buffer space (pbufs). This must be at least = 2 *
TCP_SND_BUF/TCP_MSS for things to work. */
#define TCP_SND_QUEUELEN 4 * TCP_SND_BUF/TCP_MSS
/* TCP writable space (bytes). This must be less than or equal
to TCP_SND_BUF. It is the amount of space which must be
available in the tcp snd_buf for select to return writable */
#define TCP_SNDLOWAT
(TCP_SND_BUF/2)
/* TCP receive window. */
#define TCP_WND
4096
/* Maximum number of retransmissions of data segments. */
#define TCP_MAXRTX 12
/* Maximum number of retransmissions of SYN segments. */
#define TCP_SYNMAXRTX 4
/* ---------- ARP options ---------- */
#define ARP_TABLE_SIZE 10
#define ARP_QUEUEING 1
/**
* - If enabled, cache entries are generated for every kind of ARP traffic
or
* broadcast IP traffic. This enhances behaviour for sending to a dynamic
set
* of hosts, for example if acting as a gateway.
* - If disabled, cache entries are generated only for IP destination addresses
* in use by lwIP or applications. This enhances performance if sending
to a small,
* reasonably static number of hosts. Typically for embedded devices.
*/
#define ETHARP_ALWAYS_INSERT 1
/* ---------- IP options ---------- */
/* Define IP_FORWARD to 1 if you wish to have the ability to forward
IP packets across network interfaces. If you are going to run lwIP
on a device with only one network interface, define this to 0.
*/
#define IP_FORWARD 0
#define IP_FRAG 1
/* ---------- DHCP options ---------- */
/* Define LWIP_DHCP to 1 if you want DHCP configuration of
interfaces. DHCP is not implemented in lwIP 0.5.1, however, so
turning this on does currently not work. */
#define LWIP_DHCP 0
/* 1 if you want to do an ARP check on the offered address
(recommended). */
#define DHCP_DOES_ARP_CHECK 1
/* Select modules to enable. Ideally these would be set in the makefile
but
* we're limited by the command line length so you need to modify the settings
* in this file.
*/
#define PAP_SUPPORT 1 /* Set >
0 for PAP. */
#define CHAP_SUPPORT 1 /* Set > 0
for CHAP. */
#define MSCHAP_SUPPORT 0 /* Set > 0 for MSCHAP
(NOT FUNCTIONAL!) */
#define CBCP_SUPPORT 0 /* Set > 0
for CBCP (NOT FUNCTIONAL!) */
#define CCP_SUPPORT 0 /* Set >
0 for CCP (NOT FUNCTIONAL!) */
#define VJ_SUPPORT 1 /* Set >
0 for VJ header compression. */
#define MD5_SUPPORT 1 /* Set >
0 for MD5 (see also CHAP) */
/*
* Timeouts.
*/
#define FSM_DEFTIMEOUT
6
/* Timeout time in seconds */
#define FSM_DEFMAXTERMREQS
2
/* Maximum Terminate-Request transmissions */
#define FSM_DEFMAXCONFREQS
10
/* Maximum Configure-Request transmissions */
#define FSM_DEFMAXNAKLOOPS
5
/* Maximum number of nak loops */
#define UPAP_DEFTIMEOUT
6
/* Timeout (seconds) for retransmitting req
*/
#define UPAP_DEFREQTIME
30
/* Time to wait for auth-req from peer */
#define CHAP_DEFTIMEOUT
6
/* Timeout time in seconds */
#define CHAP_DEFTRANSMITS
10
/* max # times to send challenge */
/* Interval in seconds between keepalive echo requests, 0 to disable. */
#if 1
#define LCP_ECHOINTERVAL 0
#else
#define LCP_ECHOINTERVAL 10
#endif
/* Number of unanswered echo requests before failure. */
#define LCP_MAXECHOFAILS 3
/* Max Xmit idle time (in jiffies) before resend flag char. */
#define PPP_MAXIDLEFLAG 100
/*
* Packet sizes
*
* Note - lcp shouldn't be allowed to negotiate stuff outside these
* limits. See lcp.h in the pppd directory.
* (XXX - these constants should simply be shared by lcp.c instead
* of living in lcp.h)
*/
#define PPP_MTU 1500 /* Default MTU (size of
Info field) */
#if 0
#define PPP_MAXMTU 65535 - (PPP_HDRLEN + PPP_FCSLEN)
#else
#define PPP_MAXMTU 1500 /* Largest MTU we allow */
#endif
#define PPP_MINMTU 64
#define PPP_MRU 1500 /* default MRU = max length
of info field */
#define PPP_MAXMRU 1500 /* Largest MRU we allow */
#define PPP_DEFMRU
296
/* Try for this */
#define PPP_MINMRU
128
/* No MRUs below this */
#define MAXNAMELEN 256 /* max length
of hostname or name for auth */
#define MAXSECRETLEN 256 /* max length of password
or secret */