From: Stephan Beyer <s-beyer@gmx.net>
To: git@vger.kernel.org
Cc: Stephan Beyer <s-beyer@gmx.net>,
Christian Couder <christian.couder@gmail.com>,
Junio C Hamano <gitster@pobox.com>
Subject: [PATCH v2 12/21] bisect: replace clear_distance() by unique markers
Date: Sun, 10 Apr 2016 15:19:05 +0200 [thread overview]
Message-ID: <1460294354-7031-13-git-send-email-s-beyer@gmx.net> (raw)
In-Reply-To: <1460294354-7031-1-git-send-email-s-beyer@gmx.net>
clear_distance() was a O(#commits)-time function to clear the COUNTED
flag from commits counted in count_distance().
The functions count_distance() and clear_distance() were called for
each merge commit.
This commit gets rid of the clear_distance() function by making
count_distance() use unique marker ids that do not need to be
cleared afterwards. This speeds up the bisecting process on
large repositories with a huge amount of merges.
Signed-off-by: Stephan Beyer <s-beyer@gmx.net>
---
bisect.c | 29 +++++++++++------------------
1 file changed, 11 insertions(+), 18 deletions(-)
diff --git a/bisect.c b/bisect.c
index bc1bfbd..4209c75 100644
--- a/bisect.c
+++ b/bisect.c
@@ -23,13 +23,13 @@ static const char *argv_show_branch[] = {"show-branch", NULL, NULL};
static const char *term_bad;
static const char *term_good;
+static unsigned marker;
+
struct node_data {
int weight;
+ unsigned marked;
};
-/* Remember to update object flag allocation in object.h */
-#define COUNTED (1u<<16)
-
#define DEBUG_BISECT 0
static inline struct node_data *node_data(struct commit *elem)
@@ -43,15 +43,17 @@ static int count_distance(struct commit_list *entry)
int nr = 0;
struct commit_list *todo = NULL;
commit_list_append(entry->item, &todo);
+ marker++;
while (todo) {
struct commit *commit = pop_commit(&todo);
- if (!(commit->object.flags & (UNINTERESTING | COUNTED))) {
+ if (!(commit->object.flags & UNINTERESTING)
+ && node_data(commit)->marked != marker) {
struct commit_list *p;
if (!(commit->object.flags & TREESAME))
nr++;
- commit->object.flags |= COUNTED;
+ node_data(commit)->marked = marker;
for (p = commit->parents; p; p = p->next) {
commit_list_insert(p->item, &todo);
@@ -62,15 +64,6 @@ static int count_distance(struct commit_list *entry)
return nr;
}
-static void clear_distance(struct commit_list *list)
-{
- while (list) {
- struct commit *commit = list->item;
- commit->object.flags &= ~COUNTED;
- list = list->next;
- }
-}
-
static int count_interesting_parents(struct commit *commit)
{
struct commit_list *p;
@@ -123,10 +116,9 @@ static void show_list(const char *debug, int counted, int nr,
const char *subject_start;
int subject_len;
- fprintf(stderr, "%c%c%c ",
+ fprintf(stderr, "%c%c ",
(flags & TREESAME) ? ' ' : 'T',
- (flags & UNINTERESTING) ? 'U' : ' ',
- (flags & COUNTED) ? 'C' : ' ');
+ (flags & UNINTERESTING) ? 'U' : ' ');
if (commit->util)
fprintf(stderr, "%3d", node_data(commit)->weight);
else
@@ -289,7 +281,6 @@ static struct commit_list *do_find_bisection(struct commit_list *list,
if (!(p->item->object.flags & UNINTERESTING)
&& (node_data(p->item)->weight == -2)) {
node_data(p->item)->weight = count_distance(p);
- clear_distance(list);
/* Does it happen to be at exactly half-way? */
if (!find_all && halfway(p, nr))
@@ -351,6 +342,8 @@ struct commit_list *find_bisection(struct commit_list *list,
struct commit_list *p, *best, *next, *last;
struct node_data *weights;
+ marker = 0;
+
show_list("bisection 2 entry", 0, 0, list);
/*
--
2.8.1.137.g522756c
next prev parent reply other threads:[~2016-04-10 13:20 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-10 13:18 [PATCH v2 00/21] git bisect improvements Stephan Beyer
2016-04-10 13:18 ` [PATCH v2 01/21] bisect: write about `bisect next` in documentation Stephan Beyer
2016-04-10 13:18 ` [PATCH v2 02/21] bisect: allow 'bisect run' if no good commit is known Stephan Beyer
2016-04-10 13:18 ` [PATCH v2 03/21] t/test-lib-functions.sh: generalize test_cmp_rev Stephan Beyer
2016-04-11 0:07 ` Eric Sunshine
2016-04-15 20:00 ` Junio C Hamano
2016-04-24 19:51 ` Stephan Beyer
2016-04-25 18:08 ` Junio C Hamano
2016-04-10 13:18 ` [PATCH v2 04/21] t: use test_cmp_rev() where appropriate Stephan Beyer
2016-04-11 0:07 ` Eric Sunshine
2016-04-15 20:48 ` Junio C Hamano
2016-04-10 13:18 ` [PATCH v2 05/21] t6030: generalize test to not rely on current implementation Stephan Beyer
2016-04-10 13:47 ` Torsten Bögershausen
2016-04-10 19:16 ` Junio C Hamano
2016-04-10 19:37 ` Stephan Beyer
2016-04-11 0:23 ` Eric Sunshine
2016-04-15 21:07 ` Junio C Hamano
2016-04-10 13:18 ` [PATCH v2 06/21] bisect: add test for the bisect algorithm Stephan Beyer
2016-04-15 21:13 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 07/21] bisect: plug the biggest memory leak Stephan Beyer
2016-04-15 21:18 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 08/21] bisect: make bisect compile if DEBUG_BISECT is set Stephan Beyer
2016-04-15 21:22 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 09/21] bisect: make algorithm behavior independent of DEBUG_BISECT Stephan Beyer
2016-04-15 21:25 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 10/21] bisect: get rid of recursion in count_distance() Stephan Beyer
2016-04-15 21:31 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 11/21] bisect: use struct node_data array instead of int array Stephan Beyer
2016-04-12 23:02 ` Christian Couder
2016-04-15 21:47 ` Junio C Hamano
2016-04-10 13:19 ` Stephan Beyer [this message]
2016-04-12 23:20 ` [PATCH v2 12/21] bisect: replace clear_distance() by unique markers Christian Couder
2016-04-15 22:07 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 13/21] bisect: use commit instead of commit list as arguments when appropriate Stephan Beyer
2016-04-15 22:08 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 14/21] bisect: extract get_distance() function from code duplication Stephan Beyer
2016-04-15 22:08 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 15/21] bisect: introduce distance_direction() Stephan Beyer
2016-04-15 22:10 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 16/21] bisect: make total number of commits global Stephan Beyer
2016-04-13 13:23 ` Christian Couder
2016-04-15 22:11 ` Junio C Hamano
2016-04-16 0:44 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 17/21] bisect: rename count_distance() to compute_weight() Stephan Beyer
2016-04-13 13:32 ` Christian Couder
2016-04-15 22:12 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 18/21] bisect: prepare for different algorithms based on find_all Stephan Beyer
2016-04-15 22:36 ` Junio C Hamano
2016-04-10 13:19 ` [PATCH v2 19/21] bisect: use a bottom-up traversal to find relevant weights Stephan Beyer
2016-04-13 14:11 ` Christian Couder
2016-04-15 22:47 ` Junio C Hamano
2016-04-15 22:49 ` Junio C Hamano
2016-04-26 18:27 ` Junio C Hamano
2016-04-10 13:24 ` [PATCH v2 20/21] bisect: compute best bisection in compute_relevant_weights() Stephan Beyer
2016-04-10 13:24 ` [PATCH v2 21/21] bisect: get back halfway shortcut Stephan Beyer
2016-04-15 22:53 ` Junio C Hamano
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