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Add heuristics for smooth reconnection.

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This commit is contained in:
Hidetoshi Shimokawa 2007-06-07 12:29:33 +00:00
parent 578e607926
commit f6416cb484
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=170399
1 changed files with 22 additions and 4 deletions
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26
usr.sbin/dconschat/dconschat.c
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@ -769,7 +769,8 @@ dconschat_proc_dcons(struct dcons_state *dc)
while ((len = dconschat_read_dcons(dc, port, buf,
sizeof(buf))) > 0) {
dconschat_write_socket(p->outfd, buf, len);
dconschat_get_ptr(dc);
if ((err = dconschat_get_ptr(dc)))
return (err);
}
if ((dc->flags & F_ONE_SHOT) != 0 && len <= 0)
dconschat_cleanup(0);
@ -781,13 +782,30 @@ static int
dconschat_start_session(struct dcons_state *dc)
{
int counter = 0;
int retry = 0;
int retry_unit_init = MAX(1, poll_hz / 10);
int retry_unit_offline = poll_hz * DCONS_POLL_OFFLINE;
int retry_unit = retry_unit_init;
int retry_max = retry_unit_offline / retry_unit;
while (1) {
if ((dc->flags & F_READY) == 0 &&
(++counter % (poll_hz * DCONS_POLL_OFFLINE)) == 0)
if (((dc->flags & F_READY) == 0) && ++counter > retry_unit) {
counter = 0;
retry ++;
if (retry > retry_max)
retry_unit = retry_unit_offline;
if (verbose) {
printf("%d/%d ", retry, retry_max);
fflush(stdout);
}
dconschat_fetch_header(dc);
if ((dc->flags & F_READY) != 0)
}
if ((dc->flags & F_READY) != 0) {
counter = 0;
retry = 0;
retry_unit = retry_unit_init;
dconschat_proc_dcons(dc);
}
dconschat_proc_socket(dc);
}
return (0);