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[PATCH] Limit the number of requests outstanding in ssh-fetch.

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This completes fetches if there are more than 100 outstanding requests
and there are more to prefetch.

Signed-off-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
This commit is contained in:
Daniel Barkalow 2005-10-04 00:24:55 -04:00 committed by Junio C Hamano
parent f5a5e9b9f4
commit 70a0c6fe39
1 changed files with 27 additions and 1 deletions
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28
ssh-fetch.c
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@ -36,12 +36,26 @@ static ssize_t force_write(int fd, void *buffer, size_t length)
return ret; return ret;
} }
static int prefetches = 0;
static struct object_list *in_transit = NULL;
static struct object_list **end_of_transit = &in_transit;
void prefetch(unsigned char *sha1) void prefetch(unsigned char *sha1)
{ {
char type = 'o'; char type = 'o';
struct object_list *node;
if (prefetches > 100) {
fetch(in_transit->item->sha1);
}
node = xmalloc(sizeof(struct object_list));
node->next = NULL;
node->item = lookup_unknown_object(sha1);
*end_of_transit = node;
end_of_transit = &node->next;
force_write(fd_out, &type, 1); force_write(fd_out, &type, 1);
force_write(fd_out, sha1, 20); force_write(fd_out, sha1, 20);
//memcpy(requested + 20 * prefetches++, sha1, 20); prefetches++;
} }
static char conn_buf[4096]; static char conn_buf[4096];
@ -51,6 +65,18 @@ int fetch(unsigned char *sha1)
{ {
int ret; int ret;
signed char remote; signed char remote;
struct object_list *temp;
if (memcmp(sha1, in_transit->item->sha1, 20)) {
// we must have already fetched it to clean the queue
return has_sha1_file(sha1) ? 0 : -1;
}
prefetches--;
temp = in_transit;
in_transit = in_transit->next;
if (!in_transit)
end_of_transit = &in_transit;
free(temp);
if (conn_buf_posn) { if (conn_buf_posn) {
remote = conn_buf[0]; remote = conn_buf[0];