mirrors/haproxy
1
0
Fork 0
mirror of https://git.haproxy.org/git/haproxy.git/ synced 2025-08-06 23:27:04 +02:00
Code Issues Projects Releases Wiki Activity

[MEDIUM] re-implemented the multiple read polling

Browse Source 
Multiple read polling was temporarily disabled, which had the side
effect of burning huge amounts of CPU on large objects. It has now
been re-implemented with a limit of 8 calls per wake-up, which seems
to provide best results at least on Linux.
This commit is contained in:
Willy Tarreau 2007-03-23 22:39:59 +01:00
parent 042cc79e59
commit b8949f1ed0
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/common/defaults.h
View File

@ -58,6 +58,12 @@
#define MAX_HTTP_HDR ((BUFSIZE+79)/80)
#endif
// max # of loops we can perform around a read() which succeeds.
// It's very frequent that the system returns a few TCP segments at a time.
#ifndef MAX_READ_POLL_LOOPS
#define MAX_READ_POLL_LOOPS 4
#endif
// cookie delimitor in "prefix" mode. This character is inserted between the
// persistence cookie and the original value. The '~' is allowed by RFC2965,
// and should not be too common in server names.

10
src/stream_sock.c
View File

@ -40,17 +40,14 @@
int stream_sock_read(int fd) {
struct buffer *b = fdtab[fd].cb[DIR_RD].b;
int ret, max;
int read_poll = MAX_READ_POLL_LOOPS;
#ifdef DEBUG_FULL
fprintf(stderr,"stream_sock_read : fd=%d, owner=%p\n", fd, fdtab[fd].owner);
#endif
if (fdtab[fd].state != FD_STERROR) {
#ifdef FILL_BUFFERS
while (1)
#else
do
#endif
while (read_poll-- > 0)
{
if (b->l == 0) { /* let's realign the buffer to optimize I/O */
b->r = b->w = b->lr = b->data;
@ -114,9 +111,6 @@ int stream_sock_read(int fd) {
break;
}
} /* while(1) */
#ifndef FILL_BUFFERS
while (0);
#endif
}
else {
b->flags |= BF_READ_ERROR;