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authorNicolas Pitre <nico@cam.org>2007-12-10 19:19:32 (GMT)
committerJunio C Hamano <gitster@pobox.com>2007-12-11 01:10:16 (GMT)
commiteb9688ff65a3f7fb28ee6488be728fc72e42d5d6 (patch)
tree24f1b69a8857fb366053b657f1fa7a0c6ecd0da0 /builtin-pack-objects.c
parentc07c7bf630efd8ddcd41490036c1eefb01a39f98 (diff)
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pack-objects: more threaded load balancing fix with often changed paths
The code that splits the object list amongst work threads tries to do so on "path" boundaries not to prevent good delta matches. However, in some cases, a few paths may largely dominate the hash distribution and it is not possible to have good load balancing without ignoring those boundaries. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin-pack-objects.c')
-rw-r--r--builtin-pack-objects.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/builtin-pack-objects.c b/builtin-pack-objects.c
index 250dc56..7dd0d7f 100644
--- a/builtin-pack-objects.c
+++ b/builtin-pack-objects.c
@@ -1709,6 +1709,16 @@ static void ll_find_deltas(struct object_entry **list, unsigned list_size,
list++;
sub_size--;
}
+ if (!sub_size) {
+ /*
+ * It is possible for some "paths" to have
+ * so many objects that no hash boundary
+ * might be found. Let's just steal the
+ * exact half in that case.
+ */
+ sub_size = victim->remaining / 2;
+ list -= sub_size;
+ }
target->list = list;
victim->list_size -= sub_size;
victim->remaining -= sub_size;