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Merge branch 'jc/repack'

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* jc/repack:
  prepare_packed_git(): sort packs by age and localness.
This commit is contained in:
Junio C Hamano 2007-03-14 02:08:48 -07:00
commit c49b260e99
2 changed files with 57 additions and 0 deletions
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1
cache.h
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@ -372,6 +372,7 @@ extern struct packed_git {
struct packed_git *next;
struct pack_window *windows;
uint32_t *index_base;
time_t mtime;
off_t index_size;
off_t pack_size;
int pack_fd;

56
sha1_file.c
View File

@ -739,6 +739,7 @@ struct packed_git *add_packed_git(char *path, int path_len, int local)
p->windows = NULL;
p->pack_fd = -1;
p->pack_local = local;
p->mtime = st.st_mtime;
if ((path_len > 44) && !get_sha1_hex(path + path_len - 44, sha1))
hashcpy(p->sha1, sha1);
return p;
@ -823,6 +824,60 @@ static void prepare_packed_git_one(char *objdir, int local)
closedir(dir);
}
static int sort_pack(const void *a_, const void *b_)
{
struct packed_git *a = *((struct packed_git **)a_);
struct packed_git *b = *((struct packed_git **)b_);
int st;
/*
* Local packs tend to contain objects specific to our
* variant of the project than remote ones. In addition,
* remote ones could be on a network mounted filesystem.
* Favor local ones for these reasons.
*/
st = a->pack_local - b->pack_local;
if (st)
return -st;
/*
* Younger packs tend to contain more recent objects,
* and more recent objects tend to get accessed more
* often.
*/
if (a->mtime < b->mtime)
return 1;
else if (a->mtime == b->mtime)
return 0;
return -1;
}
static void rearrange_packed_git(void)
{
struct packed_git **ary, *p;
int i, n;
for (n = 0, p = packed_git; p; p = p->next)
n++;
if (n < 2)
return;
/* prepare an array of packed_git for easier sorting */
ary = xcalloc(n, sizeof(struct packed_git *));
for (n = 0, p = packed_git; p; p = p->next)
ary[n++] = p;
qsort(ary, n, sizeof(struct packed_git *), sort_pack);
/* link them back again */
for (i = 0; i < n - 1; i++)
ary[i]->next = ary[i + 1];
ary[n - 1]->next = NULL;
packed_git = ary[0];
free(ary);
}
static int prepare_packed_git_run_once = 0;
void prepare_packed_git(void)
{
@ -837,6 +892,7 @@ void prepare_packed_git(void)
prepare_packed_git_one(alt->base, 0);
alt->name[-1] = '/';
}
rearrange_packed_git();
prepare_packed_git_run_once = 1;
}