#include "streaming.h"
#include "thread-utils.h"
#include "pack-bitmap.h"
+#include "delta-islands.h"
#include "reachable.h"
#include "sha1-array.h"
#include "argv-array.h"
static struct pack_idx_entry **written_list;
static uint32_t nr_result, nr_written, nr_seen;
+static uint32_t write_layer;
static int non_empty;
static int reuse_delta = 1, reuse_object = 1;
static int exclude_promisor_objects;
+static int use_delta_islands;
+
static unsigned long delta_cache_size = 0;
static unsigned long max_delta_cache_size = DEFAULT_DELTA_CACHE_SIZE;
static unsigned long cache_max_small_delta_size = 1000;
unsigned int *endp,
struct object_entry *e)
{
- if (e->filled)
+ if (e->filled || e->layer != write_layer)
return;
wo[(*endp)++] = e;
e->filled = 1;
add_descendants_to_write_order(wo, endp, root);
}
-static struct object_entry **compute_write_order(void)
+static void compute_layer_order(struct object_entry **wo, unsigned int *wo_end)
{
- unsigned int i, wo_end, last_untagged;
-
- struct object_entry **wo;
+ unsigned int i, last_untagged;
struct object_entry *objects = to_pack.objects;
for (i = 0; i < to_pack.nr_objects; i++) {
- objects[i].tagged = 0;
- objects[i].filled = 0;
- SET_DELTA_CHILD(&objects[i], NULL);
- SET_DELTA_SIBLING(&objects[i], NULL);
- }
-
- /*
- * Fully connect delta_child/delta_sibling network.
- * Make sure delta_sibling is sorted in the original
- * recency order.
- */
- for (i = to_pack.nr_objects; i > 0;) {
- struct object_entry *e = &objects[--i];
- if (!DELTA(e))
- continue;
- /* Mark me as the first child */
- e->delta_sibling_idx = DELTA(e)->delta_child_idx;
- SET_DELTA_CHILD(DELTA(e), e);
- }
-
- /*
- * Mark objects that are at the tip of tags.
- */
- for_each_tag_ref(mark_tagged, NULL);
-
- /*
- * Give the objects in the original recency order until
- * we see a tagged tip.
- */
- ALLOC_ARRAY(wo, to_pack.nr_objects);
- for (i = wo_end = 0; i < to_pack.nr_objects; i++) {
if (objects[i].tagged)
break;
- add_to_write_order(wo, &wo_end, &objects[i]);
+ add_to_write_order(wo, wo_end, &objects[i]);
}
last_untagged = i;
*/
for (; i < to_pack.nr_objects; i++) {
if (objects[i].tagged)
- add_to_write_order(wo, &wo_end, &objects[i]);
+ add_to_write_order(wo, wo_end, &objects[i]);
}
/*
if (oe_type(&objects[i]) != OBJ_COMMIT &&
oe_type(&objects[i]) != OBJ_TAG)
continue;
- add_to_write_order(wo, &wo_end, &objects[i]);
+ add_to_write_order(wo, wo_end, &objects[i]);
}
/*
for (i = last_untagged; i < to_pack.nr_objects; i++) {
if (oe_type(&objects[i]) != OBJ_TREE)
continue;
- add_to_write_order(wo, &wo_end, &objects[i]);
+ add_to_write_order(wo, wo_end, &objects[i]);
}
/*
* Finally all the rest in really tight order
*/
for (i = last_untagged; i < to_pack.nr_objects; i++) {
- if (!objects[i].filled)
- add_family_to_write_order(wo, &wo_end, &objects[i]);
+ if (!objects[i].filled && objects[i].layer == write_layer)
+ add_family_to_write_order(wo, wo_end, &objects[i]);
+ }
+}
+
+static struct object_entry **compute_write_order(void)
+{
+ uint32_t max_layers = 1;
+ unsigned int i, wo_end;
+
+ struct object_entry **wo;
+ struct object_entry *objects = to_pack.objects;
+
+ for (i = 0; i < to_pack.nr_objects; i++) {
+ objects[i].tagged = 0;
+ objects[i].filled = 0;
+ SET_DELTA_CHILD(&objects[i], NULL);
+ SET_DELTA_SIBLING(&objects[i], NULL);
+ }
+
+ /*
+ * Fully connect delta_child/delta_sibling network.
+ * Make sure delta_sibling is sorted in the original
+ * recency order.
+ */
+ for (i = to_pack.nr_objects; i > 0;) {
+ struct object_entry *e = &objects[--i];
+ if (!DELTA(e))
+ continue;
+ /* Mark me as the first child */
+ e->delta_sibling_idx = DELTA(e)->delta_child_idx;
+ SET_DELTA_CHILD(DELTA(e), e);
}
+ /*
+ * Mark objects that are at the tip of tags.
+ */
+ for_each_tag_ref(mark_tagged, NULL);
+
+ if (use_delta_islands)
+ max_layers = compute_pack_layers(&to_pack);
+
+ ALLOC_ARRAY(wo, to_pack.nr_objects);
+ wo_end = 0;
+
+ for (; write_layer < max_layers; ++write_layer)
+ compute_layer_order(wo, &wo_end);
+
if (wo_end != to_pack.nr_objects)
die("ordered %u objects, expected %"PRIu32, wo_end, to_pack.nr_objects);
break;
}
- if (base_ref && (base_entry = packlist_find(&to_pack, base_ref, NULL))) {
+ if (base_ref && (base_entry = packlist_find(&to_pack, base_ref, NULL)) &&
+ in_same_island(&entry->idx.oid, &base_entry->idx.oid)) {
/*
* If base_ref was set above that means we wish to
* reuse delta data, and we even found that base
return -1;
if (a->preferred_base < b->preferred_base)
return 1;
+ if (use_delta_islands) {
+ int island_cmp = island_delta_cmp(&a->idx.oid, &b->idx.oid);
+ if (island_cmp)
+ return island_cmp;
+ }
if (a_size > b_size)
return -1;
if (a_size < b_size)
if (trg_size < src_size / 32)
return 0;
+ if (!in_same_island(&trg->entry->idx.oid, &src->entry->idx.oid))
+ return 0;
+
/* Load data if not already done */
if (!trg->data) {
read_lock();
if (packlist_find(&to_pack, oid->hash, NULL))
return;
- tag = lookup_tag(oid);
+ tag = lookup_tag(the_repository, oid);
while (1) {
if (!tag || parse_tag(tag) || !tag->tagged)
die("unable to pack objects reachable from tag %s",
uint32_t i, nr_deltas;
unsigned n;
+ if (use_delta_islands)
+ resolve_tree_islands(progress, &to_pack);
+
get_object_details();
/*
if (write_bitmap_index)
index_commit_for_bitmap(commit);
+
+ if (use_delta_islands)
+ propagate_island_marks(commit);
}
static void show_object(struct object *obj, const char *name, void *data)
add_preferred_base_object(name);
add_object_entry(&obj->oid, obj->type, name, 0);
obj->flags |= OBJECT_ADDED;
+
+ if (use_delta_islands) {
+ const char *p;
+ unsigned depth = 0;
+ struct object_entry *ent;
+
+ for (p = strchr(name, '/'); p; p = strchr(p + 1, '/'))
+ depth++;
+
+ ent = packlist_find(&to_pack, obj->oid.hash, NULL);
+ if (ent && depth > ent->tree_depth)
+ ent->tree_depth = depth;
+ }
}
static void show_object__ma_allow_any(struct object *obj, const char *name, void *data)
if (use_bitmap_index && !get_object_list_from_bitmap(&revs))
return;
+ if (use_delta_islands)
+ load_delta_islands();
+
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
mark_edges_uninteresting(&revs, show_edge);
option_parse_missing_action },
OPT_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
N_("do not pack objects in promisor packfiles")),
+ OPT_BOOL(0, "delta-islands", &use_delta_islands,
+ N_("respect islands during delta compression")),
OPT_END(),
};
if (pack_to_stdout || !rev_list_all)
write_bitmap_index = 0;
+ if (use_delta_islands)
+ argv_array_push(&rp, "--topo-order");
+
if (progress && all_progress_implied)
progress = 2;