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From: Eric Wong <e@80x24.org>
To: git@vger.kernel.org
Cc: "Jeff King" <peff@peff.net>, "René Scharfe" <l.s.r@web.de>
Subject: [PATCH v2 0/5] optimizations for many alternates
Date: Tue, 29 Jun 2021 20:53:00 +0000	[thread overview]
Message-ID: <20210629205305.7100-1-e@80x24.org> (raw)
In-Reply-To: <20210627024718.25383-1-e@80x24.org>

v2 has better naming for 3/5, fix test for sha256 in 5/5
Thanks to René and Junio for feedback so far.

Eric Wong (5):
  speed up alt_odb_usable() with many alternates
  avoid strlen via strbuf_addstr in link_alt_odb_entry
  make object_directory.loose_objects_subdir_seen a bitmap
  oidcpy_with_padding: constify `src' arg
  oidtree: a crit-bit tree for odb_loose_cache

 Makefile                |   3 +
 alloc.c                 |   6 ++
 alloc.h                 |   1 +
 cbtree.c                | 167 ++++++++++++++++++++++++++++++++++++++++
 cbtree.h                |  56 ++++++++++++++
 hash.h                  |   2 +-
 object-file.c           |  69 ++++++++++-------
 object-name.c           |  28 +++----
 object-store.h          |  24 +++++-
 object.c                |   2 +
 oidtree.c               |  94 ++++++++++++++++++++++
 oidtree.h               |  29 +++++++
 t/helper/test-oidtree.c |  47 +++++++++++
 t/helper/test-tool.c    |   1 +
 t/helper/test-tool.h    |   1 +
 t/t0069-oidtree.sh      |  52 +++++++++++++
 16 files changed, 533 insertions(+), 49 deletions(-)
 create mode 100644 cbtree.c
 create mode 100644 cbtree.h
 create mode 100644 oidtree.c
 create mode 100644 oidtree.h
 create mode 100644 t/helper/test-oidtree.c
 create mode 100755 t/t0069-oidtree.sh

Interdiff against v1:
diff --git a/object-file.c b/object-file.c
index d33b84c4a4..6c397fb4f1 100644
--- a/object-file.c
+++ b/object-file.c
@@ -2463,16 +2463,17 @@ struct oidtree *odb_loose_cache(struct object_directory *odb,
 {
 	int subdir_nr = oid->hash[0];
 	struct strbuf buf = STRBUF_INIT;
-	size_t BM_SIZE = sizeof(odb->loose_objects_subdir_seen[0]) * CHAR_BIT;
+	size_t word_bits = bitsizeof(odb->loose_objects_subdir_seen[0]);
+	size_t word_index = subdir_nr / word_bits;
+	size_t mask = 1 << (subdir_nr % word_bits);
 	uint32_t *bitmap;
-	uint32_t bit = 1 << (subdir_nr % BM_SIZE);
 
 	if (subdir_nr < 0 ||
-	    subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen) * BM_SIZE)
+	    subdir_nr >= bitsizeof(odb->loose_objects_subdir_seen))
 		BUG("subdir_nr out of range");
 
-	bitmap = &odb->loose_objects_subdir_seen[subdir_nr / BM_SIZE];
-	if (*bitmap & bit)
+	bitmap = &odb->loose_objects_subdir_seen[word_index];
+	if (*bitmap & mask)
 		return &odb->loose_objects_cache;
 
 	strbuf_addstr(&buf, odb->path);
@@ -2480,7 +2481,7 @@ struct oidtree *odb_loose_cache(struct object_directory *odb,
 				    append_loose_object,
 				    NULL, NULL,
 				    &odb->loose_objects_cache);
-	*bitmap |= bit;
+	*bitmap |= mask;
 	strbuf_release(&buf);
 	return &odb->loose_objects_cache;
 }
diff --git a/t/helper/test-oidtree.c b/t/helper/test-oidtree.c
index 44bb2e7c29..e0da13eea3 100644
--- a/t/helper/test-oidtree.c
+++ b/t/helper/test-oidtree.c
@@ -13,6 +13,7 @@ int cmd__oidtree(int argc, const char **argv)
 	struct oidtree ot = OIDTREE_INIT;
 	struct strbuf line = STRBUF_INIT;
 	int nongit_ok;
+	int algo = GIT_HASH_UNKNOWN;
 
 	setup_git_directory_gently(&nongit_ok);
 
@@ -21,20 +22,21 @@ int cmd__oidtree(int argc, const char **argv)
 		struct object_id oid;
 
 		if (skip_prefix(line.buf, "insert ", &arg)) {
-			if (get_oid_hex(arg, &oid))
-				die("not a hexadecimal oid: %s", arg);
+			if (get_oid_hex_any(arg, &oid) == GIT_HASH_UNKNOWN)
+				die("insert not a hexadecimal oid: %s", arg);
+			algo = oid.algo;
 			oidtree_insert(&ot, &oid);
 		} else if (skip_prefix(line.buf, "contains ", &arg)) {
 			if (get_oid_hex(arg, &oid))
-				die("not a hexadecimal oid: %s", arg);
+				die("contains not a hexadecimal oid: %s", arg);
 			printf("%d\n", oidtree_contains(&ot, &oid));
 		} else if (skip_prefix(line.buf, "each ", &arg)) {
-			char buf[GIT_SHA1_HEXSZ  + 1] = { '0' };
+			char buf[GIT_MAX_HEXSZ + 1] = { '0' };
 			memset(&oid, 0, sizeof(oid));
 			memcpy(buf, arg, strlen(arg));
-			buf[GIT_SHA1_HEXSZ] = 0;
+			buf[hash_algos[algo].hexsz] = 0;
 			get_oid_hex_any(buf, &oid);
-			oid.algo = GIT_HASH_SHA1;
+			oid.algo = algo;
 			oidtree_each(&ot, &oid, strlen(arg), print_oid, NULL);
 		} else if (!strcmp(line.buf, "destroy"))
 			oidtree_destroy(&ot);
diff --git a/t/t0069-oidtree.sh b/t/t0069-oidtree.sh
index bb4229210c..0594f57c81 100755
--- a/t/t0069-oidtree.sh
+++ b/t/t0069-oidtree.sh
@@ -10,9 +10,9 @@ echoid () {
 	do
 		echo "$1"
 		shift
-	done | awk -v prefix="$prefix" '{
+	done | awk -v prefix="$prefix" -v ZERO_OID=$ZERO_OID '{
 		printf("%s%s", prefix, $0);
-		need = 40 - length($0);
+		need = length(ZERO_OID) - length($0);
 		for (i = 0; i < need; i++)
 			printf("0");
 		printf "\n";

  parent reply	other threads:[~2021-06-29 20:53 UTC|newest]

Thread overview: 99+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-24  0:58 [PATCH] speed up alt_odb_usable() with many alternates Eric Wong
2021-06-27  2:47 ` [PATCH 0/5] optimizations for many odb alternates Eric Wong
2021-06-27  2:47   ` [PATCH 1/5] speed up alt_odb_usable() with many alternates Eric Wong
2021-06-27  2:47   ` [PATCH 2/5] avoid strlen via strbuf_addstr in link_alt_odb_entry Eric Wong
2021-06-27  2:47   ` [PATCH 3/5] make object_directory.loose_objects_subdir_seen a bitmap Eric Wong
2021-06-27 10:23     ` René Scharfe
2021-06-28 23:09       ` Eric Wong
2021-06-27  2:47   ` [PATCH 4/5] oidcpy_with_padding: constify `src' arg Eric Wong
2021-06-27  2:47   ` [PATCH 5/5] oidtree: a crit-bit tree for odb_loose_cache Eric Wong
2021-06-29 14:42     ` Junio C Hamano
2021-06-29 20:17       ` Eric Wong
2021-06-29 20:53   ` Eric Wong [this message]
2021-07-07 23:10     ` [PATCH v3 0/5] optimizations for many alternates Eric Wong
2021-07-07 23:10     ` [PATCH v3 1/5] speed up alt_odb_usable() with " Eric Wong
2021-07-08  0:20       ` Junio C Hamano
2021-07-08  1:14         ` Eric Wong
2021-07-08  4:30           ` Junio C Hamano
2021-07-07 23:10     ` [PATCH v3 2/5] avoid strlen via strbuf_addstr in link_alt_odb_entry Eric Wong
2021-07-08  4:57       ` Junio C Hamano
2021-07-07 23:10     ` [PATCH v3 3/5] make object_directory.loose_objects_subdir_seen a bitmap Eric Wong
2021-07-07 23:10     ` [PATCH v3 4/5] oidcpy_with_padding: constify `src' arg Eric Wong
2021-07-07 23:10     ` [PATCH v3 5/5] oidtree: a crit-bit tree for odb_loose_cache Eric Wong
2021-06-29 20:53   ` [PATCH v2 1/5] speed up alt_odb_usable() with many alternates Eric Wong
2021-07-03 10:05     ` René Scharfe
2021-07-04  9:02       ` René Scharfe
2021-07-06 23:01       ` Eric Wong
2021-06-29 20:53   ` [PATCH v2 2/5] avoid strlen via strbuf_addstr in link_alt_odb_entry Eric Wong
2021-06-29 20:53   ` [PATCH v2 3/5] make object_directory.loose_objects_subdir_seen a bitmap Eric Wong
2021-06-29 20:53   ` [PATCH v2 4/5] oidcpy_with_padding: constify `src' arg Eric Wong
2021-06-29 20:53   ` [PATCH v2 5/5] oidtree: a crit-bit tree for odb_loose_cache Eric Wong
2021-07-04  9:02     ` René Scharfe
2021-07-06 23:21       ` Eric Wong
2021-07-04  9:32     ` Ævar Arnfjörð Bjarmason
2021-07-07 23:12       ` Eric Wong
2021-08-06 15:31     ` Andrzej Hunt
2021-08-06 17:53       ` René Scharfe
2021-08-07 22:49         ` Eric Wong
2021-08-09  1:35           ` Carlo Arenas
2021-08-09  1:38             ` [PATCH/RFC 0/3] pedantic errors in next Carlo Marcelo Arenas Belón
2021-08-09  1:38               ` [PATCH/RFC 1/3] oidtree: avoid nested struct oidtree_node Carlo Marcelo Arenas Belón
2021-08-09  1:38               ` [PATCH/RFC 2/3] object-store: avoid extra ';' from KHASH_INIT Carlo Marcelo Arenas Belón
2021-08-09 15:53                 ` Junio C Hamano
2021-08-09  1:38               ` [PATCH/RFC 3/3] ci: run a pedantic build as part of the GitHub workflow Carlo Marcelo Arenas Belón
2021-08-09 10:50                 ` Bagas Sanjaya
2021-08-09 22:03                   ` Carlo Arenas
2021-08-09 14:56                 ` Phillip Wood
2021-08-09 22:48                   ` Carlo Arenas
2021-08-10 15:24                     ` Phillip Wood
2021-08-10 18:25                       ` Junio C Hamano
2021-08-30 11:36                   ` Ævar Arnfjörð Bjarmason
2021-08-31 20:28                     ` Carlo Arenas
2021-08-31 20:51                       ` Ævar Arnfjörð Bjarmason
2021-08-31 23:54                         ` Carlo Arenas
2021-09-01  1:52                           ` Jeff King
2021-09-01 17:55                             ` Junio C Hamano
2021-08-30 11:40                 ` Ævar Arnfjörð Bjarmason
2021-09-01  9:19                 ` [RFC PATCH v2 0/4] developer: support pedantic Carlo Marcelo Arenas Belón
2021-09-01  9:19                   ` [RFC PATCH v2 1/4] developer: retire USE_PARENS_AROUND_GETTEXT_N support Carlo Marcelo Arenas Belón
2021-09-01  9:19                   ` [RFC PATCH v2 2/4] developer: enable pedantic by default Carlo Marcelo Arenas Belón
2021-09-01  9:19                   ` [RFC PATCH v2 3/4] developer: add an alternative script for detecting broken N_() Carlo Marcelo Arenas Belón
2021-09-01  9:19                   ` [RFC PATCH v2 4/4] developer: move detect-compiler out of the main directory Carlo Marcelo Arenas Belón
2021-09-01 10:10                   ` [RFC PATCH v2 0/4] developer: support pedantic Jeff King
2021-09-01 11:25                     ` [PATCH] gettext: remove optional non-standard parens in N_() definition Ævar Arnfjörð Bjarmason
2021-09-01 17:31                       ` Eric Sunshine
2021-09-02  9:13                       ` Jeff King
2021-09-02 19:19                       ` Junio C Hamano
2021-09-01 11:27                     ` [RFC PATCH v2 0/4] developer: support pedantic Ævar Arnfjörð Bjarmason
2021-09-01 18:03                       ` Carlo Arenas
2021-09-03 17:02                   ` [PATCH v3 0/3] support pedantic in developer mode Carlo Marcelo Arenas Belón
2021-09-03 17:02                     ` [PATCH v3 1/3] gettext: remove optional non-standard parens in N_() definition Carlo Marcelo Arenas Belón
2021-09-10 15:39                       ` Ævar Arnfjörð Bjarmason
2021-09-03 17:02                     ` [PATCH v3 2/3] win32: allow building with pedantic mode enabled Carlo Marcelo Arenas Belón
2021-09-03 18:47                       ` René Scharfe
2021-09-03 20:13                         ` Carlo Marcelo Arenas Belón
2021-09-03 20:32                           ` Junio C Hamano
2021-09-03 20:38                           ` René Scharfe
2021-09-04  9:37                             ` René Scharfe
2021-09-04 14:42                               ` Carlo Arenas
2021-09-27 23:04                       ` Jonathan Tan
2021-09-28  0:30                         ` Carlo Arenas
2021-09-28 16:50                           ` Jonathan Tan
2021-09-28 17:37                           ` Junio C Hamano
2021-09-28 20:16                             ` Jonathan Tan
2021-09-29  1:00                               ` Carlo Arenas
2021-09-29 15:55                                 ` Junio C Hamano
2021-09-03 17:02                     ` [PATCH v3 3/3] developer: enable pedantic by default Carlo Marcelo Arenas Belón
2021-09-05  7:54                     ` [PATCH v3 0/3] support pedantic in developer mode Ævar Arnfjörð Bjarmason
2021-08-09 16:44               ` [PATCH/RFC 0/3] pedantic errors in next Junio C Hamano
2021-08-09 20:10                 ` Eric Wong
2021-08-10  6:16                 ` Carlo Marcelo Arenas Belón
2021-08-10 19:30                   ` René Scharfe
2021-08-10 23:49                     ` Carlo Arenas
2021-08-11  0:57                       ` Carlo Arenas
2021-08-11 14:57                       ` René Scharfe
2021-08-11 17:20                         ` Junio C Hamano
2021-08-10 18:59             ` [PATCH v2 5/5] oidtree: a crit-bit tree for odb_loose_cache René Scharfe
2021-08-10 19:40           ` René Scharfe
2021-08-14 20:00       ` [PATCH] oidtree: avoid unaligned access to crit-bit tree René Scharfe
2021-08-16 19:11         ` Junio C Hamano

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