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Change TCP_TMR_INTERVAL from 100 to 250ms.

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tcp_fasttmr() and tcp_slowtmr() call frequencies should remain unchanged,
but system load will be reduced. Closes patch #1495. Please email me
if you see any issues with this. Non-standard TCP timer definitions in
contrib/ports/v2pro/lwipopts.h might need adjustment as a consequence
of this change.
This commit is contained in:
marcbou 2003-06-19 12:45:32 +00:00
parent 6657b656f5
commit cea3ff9d38
2 changed files with 17 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/core/tcp.c
View File

@ -106,18 +106,11 @@ tcp_init(void)
void
tcp_tmr(void)
{
++tcp_timer;
if (tcp_timer == 10) {
tcp_timer = 0;
}
/* Call tcp_fasttmr() every 250 ms */
tcp_fasttmr();
if (tcp_timer & 1) {
/* Call tcp_fasttmr() every 200 ms, i.e., every other timer
tcp_tmr() is called. */
tcp_fasttmr();
}
if (tcp_timer == 0 || tcp_timer == 5) {
/* Call tcp_slowtmr() every 500 ms, i.e., every fifth timer
if (++tcp_timer & 1) {
/* Call tcp_tmr() every 500 ms, i.e., every other timer
tcp_tmr() is called. */
tcp_slowtmr();
}
@ -626,7 +619,7 @@ tcp_slowtmr(void)
/*
* tcp_fasttmr():
*
* Is called every TCP_FINE_TIMEOUT (100 ms) and sends delayed ACKs.
* Is called every TCP_FAST_INTERVAL (250 ms) and sends delayed ACKs.
*/
/*-----------------------------------------------------------------------------------*/
void

22
src/include/lwip/tcp.h
View File

@ -53,7 +53,7 @@ void tcp_init (void); /* Must be called first to
initialize TCP. */
void tcp_tmr (void); /* Must be called every
TCP_TMR_INTERVAL
ms. (Typically 100 ms). */
ms. (Typically 250 ms). */
/* Application program's interface: */
struct tcp_pcb * tcp_new (void);
struct tcp_pcb * tcp_alloc (u8_t prio);
@ -115,30 +115,30 @@ void tcp_rexmit (struct tcp_pcb *pcb);
#define TCP_SEQ_GT(a,b) ((s32_t)((a)-(b)) > 0)
#define TCP_SEQ_GEQ(a,b) ((s32_t)((a)-(b)) >= 0)
#define TCP_FIN 0x01
#define TCP_SYN 0x02
#define TCP_RST 0x04
#define TCP_PSH 0x08
#define TCP_ACK 0x10
#define TCP_URG 0x20
#define TCP_FIN 0x01U
#define TCP_SYN 0x02U
#define TCP_RST 0x04U
#define TCP_PSH 0x08U
#define TCP_ACK 0x10U
#define TCP_URG 0x20U
#define TCP_FLAGS 0x3f
#define TCP_FLAGS 0x3fU
/* Length of the TCP header, excluding options. */
#define TCP_HLEN 20
#ifndef TCP_TMR_INTERVAL
#define TCP_TMR_INTERVAL 100 /* The TCP timer interval in
#define TCP_TMR_INTERVAL 250 /* The TCP timer interval in
milliseconds. */
#endif /* TCP_TMR_INTERVAL */
#ifndef TCP_FAST_INTERVAL
#define TCP_FAST_INTERVAL 200 /* the fine grained timeout in
#define TCP_FAST_INTERVAL TCP_TMR_INTERVAL /* the fine grained timeout in
milliseconds */
#endif /* TCP_FAST_INTERVAL */
#ifndef TCP_SLOW_INTERVAL
#define TCP_SLOW_INTERVAL 500 /* the coarse grained timeout in
#define TCP_SLOW_INTERVAL (2*TCP_TMR_INTERVAL) /* the coarse grained timeout in
milliseconds */
#endif /* TCP_SLOW_INTERVAL */