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From: Jeff King <peff@peff.net>
To: Taylor Blau <me@ttaylorr.com>
Cc: git@vger.kernel.org, dstolee@microsoft.com, gitster@pobox.com,
	jonathantanmy@google.com
Subject: Re: [PATCH v2 13/24] pack-bitmap: read multi-pack bitmaps
Date: Fri, 23 Jul 2021 06:00:47 -0400	[thread overview]
Message-ID: <YPqTTwqifHIWZRsn@coredump.intra.peff.net> (raw)
In-Reply-To: <YPinPFW50Mj8cVkP@nand.local>

On Wed, Jul 21, 2021 at 07:01:16PM -0400, Taylor Blau wrote:

> > OK, this new function is used in load_bitmap(), which is used for both
> > pack and midx bitmaps. So if we have a midx bitmap, we'll
> > unconditionally load the revindex here. But:
> >
> >   - why do we then load individual pack revindexes? I can believe it may
> >     be necessary to meet the assumptions of some other part of the code,
> >     but it would be nice to have a comment giving us some clue.
> 
> Good suggestion. We will need to reference the reverse index belonging
> to individual packs in a few locations in pack-objects (for e.g.,
> write_reuse_object() calls offset_to_pack_pos(), and
> pack_pos_to_offset(), both with arbitrary packs, not just the preferred
> one).
> 
> I left the comment vague; something along the lines of "lots of routines
> in pack-objects will need these structures to be ready to use".

Makes sense. I think we _could_ be lazy-loading them, but IIRC only some
of the revindex functions are happy to lazy-load. It's definitely fine
to punt on that for now with a comment.

> I think there's room for improvement there, since for e.g., `git
> rev-list --count --objects --use-bitmap-index` doesn't need to load the
> reverse indexes. But that's already the case with classic bitmaps, too,
> which eagerly call load_pack_revindex().

Right. I think our solution there was to make loading the revindex
really cheap (open+mmap, rather than the in-core generation). I'm
definitely happy to call that fast enough for now, and if somebody wants
to benchmark and micro-optimize cases where we can avoid loading them,
we can do that later.

> > In practice I think even 2^31 objects is pretty out-of-reach, but it may
> > be worth changing the return type (and the callers), or even just
> > catching the overflow with an assertion.
> 
> Possibly, but keep in mind that the former is basically the same
> refactor as we did with the "tell me whether this object was found via
> this extra pointer". But bitmap_position() has a lot more callers than
> that, so the plumbing required would be a little more prevalent.
> 
> So I'd be content to just punt on it for now, if you'd be OK with it.

Yeah, I think it's fine to leave it out of this series. It's not new,
and we can revisit it later.

> > Could this ever be fooled if we had a preferred pack with 0 objects in
> > it? I don't know why we would have such a thing, but just trying to
> > think of cases where our assumptions might not hold (and what bad things
> > could happen).
> 
> An empty preferred pack would cause a problem, yes. The solution is
> two-fold (and incorporated into the reroll that I plan on sending
> shortly):
> 
>   - When the user specifies --preferred-pack, the MIDX code must make
>     sure that the given pack is non-empty. That's a new patch, and
>     basically adds a new conditional (to check the pack itself) and a
>     test (to make sure that we catch the case we are trying to prevent).
> 
>   - When the user doesn't specify --preferred-pack (and instead asks us
>     to infer one for them) we want to select not just the oldest pack,
>     but the oldest *non-empty* pack. That is folded into the "midx:
>     infer preferred pack when not given one" patch.

Oh good, I said something useful. ;) The fix you outlined sounds
sensible.

> > > +			if (bitmap_is_midx(bitmap_git)) {
> > > +				/*
> > > +				 * Can't reuse from a non-preferred pack (see
> > > +				 * above).
> > > +				 */
> > > +				if (pos + offset >= objects_nr)
> > > +					continue;
> > > +			}
> > > +			try_partial_reuse(bitmap_git, pack, pos + offset, reuse, &w_curs);
> >
> > ...and this likewise makes sure we never go past that first pack. Good.
> >
> > I think this "continue" could actually be a "break", as the loop is
> > iterating over "offset" (and "pos + offset" always gets larger). In
> > fact, it could break out of the outer loop as well (which is
> > incrementing "pos"). It's probably a pretty small efficiency in
> > practice, though.
> 
> Yeah; you're right. And we'll save up to BITS_IN_EWORD cycles of this
> loop. (I wonder if smart-enough compilers will realize the same
> optimization that you did and turn that `continue` into a `break`
> automatically, but that's neither here nor there).

If you break all the way out, then it saves iterating over all of those
other words that are not in the first pack, too. I.e., if your bitmap
has 10 million bits (for a 10-million object clone), but your first pack
only has a million objects in it, we'll call try_partial_reuse() 9
million extra times.

Fortunately, each call is super cheap, because the first thing it does
is check if the requested bit is past the end of the pack. Which kind of
makes me wonder if we could simplify this further by just letting
try_partial_reuse() tell us when there's no point going further:

diff --git a/pack-bitmap.c b/pack-bitmap.c
index 02948e8c78..b84b55c4f3 100644
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -1308,7 +1308,11 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
 	return NULL;
 }
 
-static void try_partial_reuse(struct bitmap_index *bitmap_git,
+/*
+ * -1 means "stop trying further objects"; 0 means we may or may not have
+ * reused, but you can keep feeding bits.
+ */
+static int try_partial_reuse(struct bitmap_index *bitmap_git,
 			      struct packed_git *pack,
 			      size_t pos,
 			      struct bitmap *reuse,
@@ -1342,12 +1346,12 @@ static void try_partial_reuse(struct bitmap_index *bitmap_git,
 	 */
 
 	if (pos >= pack->num_objects)
-		return; /* not actually in the pack or MIDX preferred pack */
+		return -1; /* not actually in the pack or MIDX preferred pack */
 
 	offset = delta_obj_offset = pack_pos_to_offset(pack, pos);
 	type = unpack_object_header(pack, w_curs, &offset, &size);
 	if (type < 0)
-		return; /* broken packfile, punt */
+		return -1; /* broken packfile, punt */
 
 	if (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA) {
 		off_t base_offset;
@@ -1364,9 +1368,9 @@ static void try_partial_reuse(struct bitmap_index *bitmap_git,
 		base_offset = get_delta_base(pack, w_curs, &offset, type,
 					     delta_obj_offset);
 		if (!base_offset)
-			return;
+			return 0;
 		if (offset_to_pack_pos(pack, base_offset, &base_pos) < 0)
-			return;
+			return 0;
 
 		/*
 		 * We assume delta dependencies always point backwards. This
@@ -1378,7 +1382,7 @@ static void try_partial_reuse(struct bitmap_index *bitmap_git,
 		 * odd parameters.
 		 */
 		if (base_pos >= pos)
-			return;
+			return 0;
 
 		/*
 		 * And finally, if we're not sending the base as part of our
@@ -1389,13 +1393,14 @@ static void try_partial_reuse(struct bitmap_index *bitmap_git,
 		 * object_entry code path handle it.
 		 */
 		if (!bitmap_get(reuse, base_pos))
-			return;
+			return 0;
 	}
 
 	/*
 	 * If we got here, then the object is OK to reuse. Mark it.
 	 */
 	bitmap_set(reuse, pos);
+	return 0;
 }
 
 static uint32_t midx_preferred_pack(struct bitmap_index *bitmap_git)
@@ -1449,22 +1454,20 @@ int reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
 	for (; i < result->word_alloc; ++i) {
 		eword_t word = result->words[i];
 		size_t pos = (i * BITS_IN_EWORD);
+		int ret;
 
 		for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
 			if ((word >> offset) == 0)
 				break;
 
 			offset += ewah_bit_ctz64(word >> offset);
-			if (bitmap_is_midx(bitmap_git)) {
-				/*
-				 * Can't reuse from a non-preferred pack (see
-				 * above).
-				 */
-				if (pos + offset >= objects_nr)
-					continue;
-			}
-			try_partial_reuse(bitmap_git, pack, pos + offset, reuse, &w_curs);
+			ret = try_partial_reuse(bitmap_git, pack, pos + offset,
+						reuse, &w_curs);
+			if (ret < 0)
+				break;
 		}
+		if (ret < 0)
+			break;
 	}
 
 	unuse_pack(&w_curs);

The double-ret check is kind of ugly, though I suspect compilers
optimize it pretty well. The alternative is a "goto" to a label just
past the loop (also ugly, but easily explained with a comment).

> > > @@ -1511,8 +1749,13 @@ uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
> > >  		struct object_id oid;
> > >  		struct object_entry *oe;
> > >
> > > -		nth_packed_object_id(&oid, bitmap_git->pack,
> > > -				     pack_pos_to_index(bitmap_git->pack, i));
> > > +		if (bitmap_is_midx(bitmap_git))
> > > +			nth_midxed_object_oid(&oid,
> > > +					      bitmap_git->midx,
> > > +					      pack_pos_to_midx(bitmap_git->midx, i));
> > > +		else
> > > +			nth_packed_object_id(&oid, bitmap_git->pack,
> > > +					     pack_pos_to_index(bitmap_git->pack, i));
> > >  		oe = packlist_find(mapping, &oid);
> >
> > Could this be using nth_bitmap_object_oid()? I guess not, because we are
> > feeding from pack_pos_to_*. I'm not sure if another helper function is
> > worth it (pack_pos_to_bitmap_index() or something?).
> 
> You're right that we can't call nth_bitmap_object_oid here directly,
> sadly. But I think your suggestion for pack_pos_to_bitmap_index() (or
> similar) would only benefit this caller, since most places that dispatch
> conditionally to either pack_pos_to_{midx,index} want to pass the result
> to a different function depending on which branch they took.
> 
> Definitely possible that I missed another case that would help, but that
> was what I came up with after just a quick glance.

Yeah, looking around, I don't see another opportunity. So the benefits
are pretty minimal. We could do:

  index_pos = bitmap_is_midx(bitmap_git) ?
              pack_pos_to_midx(bitmap_git->midx, i) :
	      pack_pos_to_index(bitmap_git->pack, i);
  nth_bitmap_object_oid(&oid, bitmap_git, index_pos);

but that is not buying much. I'm content to leave it.

-Peff

  parent reply	other threads:[~2021-07-23 10:00 UTC|newest]

Thread overview: 273+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-09 18:10 [PATCH 00/22] multi-pack reachability bitmaps Taylor Blau
2021-04-09 18:10 ` [PATCH 01/22] pack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps Taylor Blau
2021-04-09 18:10 ` [PATCH 02/22] pack-bitmap-write.c: gracefully fail to write non-closed bitmaps Taylor Blau
2021-04-16  2:46   ` Jonathan Tan
2021-04-09 18:10 ` [PATCH 03/22] pack-bitmap-write.c: free existing bitmaps Taylor Blau
2021-04-09 18:10 ` [PATCH 04/22] Documentation: build 'technical/bitmap-format' by default Taylor Blau
2021-04-09 18:11 ` [PATCH 05/22] Documentation: describe MIDX-based bitmaps Taylor Blau
2021-04-09 18:11 ` [PATCH 06/22] midx: make a number of functions non-static Taylor Blau
2021-04-09 18:11 ` [PATCH 07/22] midx: clear auxiliary .rev after replacing the MIDX Taylor Blau
2021-04-09 18:11 ` [PATCH 08/22] midx: respect 'core.multiPackIndex' when writing Taylor Blau
2021-04-09 18:11 ` [PATCH 09/22] pack-bitmap.c: introduce 'bitmap_num_objects()' Taylor Blau
2021-04-09 18:11 ` [PATCH 10/22] pack-bitmap.c: introduce 'nth_bitmap_object_oid()' Taylor Blau
2021-04-09 18:11 ` [PATCH 11/22] pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' Taylor Blau
2021-04-09 18:11 ` [PATCH 12/22] pack-bitmap: read multi-pack bitmaps Taylor Blau
2021-04-16  2:39   ` Jonathan Tan
2021-04-16  3:13     ` Taylor Blau
2021-04-09 18:11 ` [PATCH 13/22] pack-bitmap: write " Taylor Blau
2021-05-04  5:02   ` Jonathan Tan
2021-05-06 20:18     ` Taylor Blau
2021-05-06 22:00       ` Jonathan Tan
2021-04-09 18:11 ` [PATCH 14/22] t5310: move some tests to lib-bitmap.sh Taylor Blau
2021-04-09 18:11 ` [PATCH 15/22] t/helper/test-read-midx.c: add --checksum mode Taylor Blau
2021-04-09 18:12 ` [PATCH 16/22] t5326: test multi-pack bitmap behavior Taylor Blau
2021-05-04 17:51   ` Jonathan Tan
2021-04-09 18:12 ` [PATCH 17/22] t5310: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP Taylor Blau
2021-04-09 18:12 ` [PATCH 18/22] t5319: don't write MIDX bitmaps in t5319 Taylor Blau
2021-04-09 18:12 ` [PATCH 19/22] t7700: update to work with MIDX bitmap test knob Taylor Blau
2021-04-09 18:12 ` [PATCH 20/22] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' Taylor Blau
2021-04-09 18:12 ` [PATCH 21/22] p5310: extract full and partial bitmap tests Taylor Blau
2021-04-09 18:12 ` [PATCH 22/22] p5326: perf tests for MIDX bitmaps Taylor Blau
2021-05-04 18:00   ` Jonathan Tan
2021-05-05  0:55     ` Junio C Hamano
2021-06-21 22:24 ` [PATCH v2 00/24] multi-pack reachability bitmaps Taylor Blau
2021-06-21 22:24   ` [PATCH v2 01/24] pack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps Taylor Blau
2021-06-24 23:02     ` Ævar Arnfjörð Bjarmason
2021-07-14 17:24       ` Taylor Blau
2021-07-21  9:45     ` Jeff King
2021-07-21 17:15       ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 02/24] pack-bitmap-write.c: gracefully fail to write non-closed bitmaps Taylor Blau
2021-06-24 23:23     ` Ævar Arnfjörð Bjarmason
2021-07-14 17:32       ` Taylor Blau
2021-07-14 18:44         ` Ævar Arnfjörð Bjarmason
2021-07-21  9:53         ` Jeff King
2021-07-21  9:50     ` Jeff King
2021-07-21 17:20       ` Taylor Blau
2021-07-23  7:37         ` Jeff King
2021-07-26 18:48           ` Taylor Blau
2021-07-27 17:11             ` Jeff King
2021-06-21 22:25   ` [PATCH v2 03/24] pack-bitmap-write.c: free existing bitmaps Taylor Blau
2021-07-21  9:54     ` Jeff King
2021-06-21 22:25   ` [PATCH v2 04/24] Documentation: build 'technical/bitmap-format' by default Taylor Blau
2021-06-24 23:35     ` Ævar Arnfjörð Bjarmason
2021-07-14 17:41       ` Taylor Blau
2021-07-14 22:58         ` Ævar Arnfjörð Bjarmason
2021-07-21 10:04           ` Jeff King
2021-07-21 10:10             ` Jeff King
2021-07-21  9:58     ` Jeff King
2021-07-21 10:08       ` Jeff King
2021-07-21 17:23         ` Taylor Blau
2021-07-23  7:39           ` Jeff King
2021-07-26 18:49             ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 05/24] Documentation: describe MIDX-based bitmaps Taylor Blau
2021-07-21 10:18     ` Jeff King
2021-07-21 17:53       ` Taylor Blau
2021-07-23  7:45         ` Jeff King
2021-06-21 22:25   ` [PATCH v2 06/24] midx: make a number of functions non-static Taylor Blau
2021-06-24 23:42     ` Ævar Arnfjörð Bjarmason
2021-07-14 23:01       ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 07/24] midx: clear auxiliary .rev after replacing the MIDX Taylor Blau
2021-07-21 10:19     ` Jeff King
2021-06-21 22:25   ` [PATCH v2 08/24] midx: respect 'core.multiPackIndex' when writing Taylor Blau
2021-06-24 23:43     ` Ævar Arnfjörð Bjarmason
2021-07-21 10:23     ` Jeff King
2021-07-21 19:22       ` Taylor Blau
2021-07-23  8:29         ` Jeff King
2021-07-26 18:59           ` Taylor Blau
2021-07-26 22:14             ` Taylor Blau
2021-07-27 17:29               ` Jeff King
2021-07-27 17:36                 ` Taylor Blau
2021-07-27 17:42                   ` Jeff King
2021-07-27 17:47                     ` Taylor Blau
2021-07-27 17:55                       ` Jeff King
2021-07-27 20:05                         ` Taylor Blau
2021-07-28 17:46                           ` Jeff King
2021-07-29 19:44                             ` Taylor Blau
2021-08-12 19:59                               ` Jeff King
2021-07-27 17:17             ` Jeff King
2021-06-21 22:25   ` [PATCH v2 09/24] midx: infer preferred pack when not given one Taylor Blau
2021-07-21 10:34     ` Jeff King
2021-07-21 20:16       ` Taylor Blau
2021-07-23  8:50         ` Jeff King
2021-07-26 19:44           ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 10/24] pack-bitmap.c: introduce 'bitmap_num_objects()' Taylor Blau
2021-07-21 10:35     ` Jeff King
2021-06-21 22:25   ` [PATCH v2 11/24] pack-bitmap.c: introduce 'nth_bitmap_object_oid()' Taylor Blau
2021-06-24 14:59     ` Taylor Blau
2021-07-21 10:37     ` Jeff King
2021-07-21 10:38       ` Jeff King
2021-06-21 22:25   ` [PATCH v2 12/24] pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' Taylor Blau
2021-07-21 10:39     ` Jeff King
2021-07-21 20:18       ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 13/24] pack-bitmap: read multi-pack bitmaps Taylor Blau
2021-07-21 11:32     ` Jeff King
2021-07-21 23:01       ` Taylor Blau
2021-07-23  9:40         ` Jeff King
2021-07-23 10:00         ` Jeff King [this message]
2021-07-26 20:36           ` Taylor Blau
2021-06-21 22:25   ` [PATCH v2 14/24] pack-bitmap: write " Taylor Blau
2021-06-24 23:45     ` Ævar Arnfjörð Bjarmason
2021-07-15 14:33       ` Taylor Blau
2021-07-21 12:09     ` Jeff King
2021-07-26 18:12       ` Taylor Blau
2021-07-26 18:23         ` Taylor Blau
2021-07-27 17:11         ` Jeff King
2021-07-27 20:33           ` Taylor Blau
2021-07-28 17:52             ` Jeff King
2021-07-29 19:33               ` Taylor Blau
2021-08-12 20:00                 ` Jeff King
2021-06-21 22:25   ` [PATCH v2 15/24] t5310: move some tests to lib-bitmap.sh Taylor Blau
2021-06-21 22:25   ` [PATCH v2 16/24] t/helper/test-read-midx.c: add --checksum mode Taylor Blau
2021-06-21 22:25   ` [PATCH v2 17/24] t5326: test multi-pack bitmap behavior Taylor Blau
2021-06-21 22:25   ` [PATCH v2 18/24] t0410: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP Taylor Blau
2021-06-21 22:25   ` [PATCH v2 19/24] t5310: " Taylor Blau
2021-06-21 22:25   ` [PATCH v2 20/24] t5319: don't write MIDX bitmaps in t5319 Taylor Blau
2021-06-21 22:25   ` [PATCH v2 21/24] t7700: update to work with MIDX bitmap test knob Taylor Blau
2021-06-21 22:25   ` [PATCH v2 22/24] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' Taylor Blau
2021-06-25  0:03     ` Ævar Arnfjörð Bjarmason
2021-06-21 22:25   ` [PATCH v2 23/24] p5310: extract full and partial bitmap tests Taylor Blau
2021-06-21 22:26   ` [PATCH v2 24/24] p5326: perf tests for MIDX bitmaps Taylor Blau
2021-06-25  9:06   ` [PATCH v2 00/24] multi-pack reachability bitmaps Ævar Arnfjörð Bjarmason
2021-07-15 14:36     ` Taylor Blau
2021-07-21 12:12       ` Jeff King
2021-07-27 21:19 ` [PATCH v3 00/25] " Taylor Blau
2021-07-27 21:19   ` [PATCH v3 01/25] pack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps Taylor Blau
2021-07-27 21:19   ` [PATCH v3 02/25] pack-bitmap-write.c: gracefully fail to write non-closed bitmaps Taylor Blau
2021-07-27 21:19   ` [PATCH v3 03/25] pack-bitmap-write.c: free existing bitmaps Taylor Blau
2021-07-27 21:19   ` [PATCH v3 04/25] Documentation: describe MIDX-based bitmaps Taylor Blau
2021-07-27 21:19   ` [PATCH v3 05/25] midx: clear auxiliary .rev after replacing the MIDX Taylor Blau
2021-07-27 21:19   ` [PATCH v3 06/25] midx: reject empty `--preferred-pack`'s Taylor Blau
2021-07-27 21:19   ` [PATCH v3 07/25] midx: infer preferred pack when not given one Taylor Blau
2021-07-27 21:19   ` [PATCH v3 08/25] midx: close linked MIDXs, avoid leaking memory Taylor Blau
2021-07-27 21:19   ` [PATCH v3 09/25] midx: avoid opening multiple MIDXs when writing Taylor Blau
2021-07-29 19:30     ` Taylor Blau
2021-08-12 20:15     ` Jeff King
2021-08-12 20:22       ` Jeff King
2021-08-12 21:20         ` Taylor Blau
2021-07-27 21:19   ` [PATCH v3 10/25] pack-bitmap.c: introduce 'bitmap_num_objects()' Taylor Blau
2021-07-27 21:19   ` [PATCH v3 11/25] pack-bitmap.c: introduce 'nth_bitmap_object_oid()' Taylor Blau
2021-07-27 21:19   ` [PATCH v3 12/25] pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' Taylor Blau
2021-07-27 21:19   ` [PATCH v3 13/25] pack-bitmap.c: avoid redundant calls to try_partial_reuse Taylor Blau
2021-07-27 21:19   ` [PATCH v3 14/25] pack-bitmap: read multi-pack bitmaps Taylor Blau
2021-07-27 21:20   ` [PATCH v3 15/25] pack-bitmap: write " Taylor Blau
2021-07-27 21:20   ` [PATCH v3 16/25] t5310: move some tests to lib-bitmap.sh Taylor Blau
2021-08-12 20:25     ` Jeff King
2021-07-27 21:20   ` [PATCH v3 17/25] t/helper/test-read-midx.c: add --checksum mode Taylor Blau
2021-08-12 20:31     ` Jeff King
2021-08-12 21:31       ` Taylor Blau
2021-07-27 21:20   ` [PATCH v3 18/25] t5326: test multi-pack bitmap behavior Taylor Blau
2021-08-12 21:02     ` Jeff King
2021-08-12 21:07       ` Jeff King
2021-08-12 22:38       ` Taylor Blau
2021-08-12 23:23         ` Jeff King
2021-07-27 21:20   ` [PATCH v3 19/25] t0410: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP Taylor Blau
2021-07-27 21:20   ` [PATCH v3 20/25] t5310: " Taylor Blau
2021-07-27 21:20   ` [PATCH v3 21/25] t5319: don't write MIDX bitmaps in t5319 Taylor Blau
2021-07-27 21:20   ` [PATCH v3 22/25] t7700: update to work with MIDX bitmap test knob Taylor Blau
2021-07-27 21:20   ` [PATCH v3 23/25] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' Taylor Blau
2021-08-12 21:09     ` Jeff King
2021-07-27 21:20   ` [PATCH v3 24/25] p5310: extract full and partial bitmap tests Taylor Blau
2021-07-27 21:20   ` [PATCH v3 25/25] p5326: perf tests for MIDX bitmaps Taylor Blau
2021-08-12 21:18     ` Jeff King
2021-08-12 21:21   ` [PATCH v3 00/25] multi-pack reachability bitmaps Jeff King
2021-08-12 22:41     ` Taylor Blau
2021-08-24 16:15 ` [PATCH v4 " Taylor Blau
2021-08-24 16:15   ` [PATCH v4 01/25] pack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps Taylor Blau
2021-08-24 16:15   ` [PATCH v4 02/25] pack-bitmap-write.c: gracefully fail to write non-closed bitmaps Taylor Blau
2021-08-24 16:15   ` [PATCH v4 03/25] pack-bitmap-write.c: free existing bitmaps Taylor Blau
2021-08-24 16:15   ` [PATCH v4 04/25] Documentation: describe MIDX-based bitmaps Taylor Blau
2021-08-24 16:16   ` [PATCH v4 05/25] midx: clear auxiliary .rev after replacing the MIDX Taylor Blau
2021-08-24 20:27     ` Junio C Hamano
2021-08-24 20:34       ` Taylor Blau
2021-08-24 21:12         ` Junio C Hamano
2021-08-24 21:24           ` Taylor Blau
2021-08-24 22:01             ` Taylor Blau
2021-08-24 22:04             ` Junio C Hamano
2021-08-24 22:06               ` Junio C Hamano
2021-08-24 22:10                 ` Taylor Blau
2021-08-27  6:01                   ` Junio C Hamano
2021-08-27 18:03                     ` Taylor Blau
2021-08-29 22:56                       ` Junio C Hamano
2021-08-30  0:07                         ` Taylor Blau
2021-08-30  0:34                           ` Junio C Hamano
2021-08-30  0:43                             ` Taylor Blau
2021-08-30 22:10                               ` brian m. carlson
2021-08-30 22:28                                 ` Junio C Hamano
2021-08-30 22:33                                   ` Taylor Blau
2021-08-31  5:19                                     ` Jeff King
2021-08-31 16:29                                     ` Junio C Hamano
2021-08-31 16:39                                       ` Taylor Blau
2021-08-31 17:44                                         ` Junio C Hamano
2021-08-31 18:48                                           ` Taylor Blau
2021-08-31  1:21                           ` Derrick Stolee
2021-08-31  5:37                             ` Jeff King
2021-08-31 16:33                               ` Junio C Hamano
2021-08-31 16:43                                 ` Taylor Blau
2021-08-31 17:17                                   ` Derrick Stolee
2021-09-01 10:03                                 ` Jeff King
2021-08-24 16:16   ` [PATCH v4 06/25] midx: reject empty `--preferred-pack`'s Taylor Blau
2021-08-24 16:16   ` [PATCH v4 07/25] midx: infer preferred pack when not given one Taylor Blau
2021-08-24 16:16   ` [PATCH v4 08/25] midx: close linked MIDXs, avoid leaking memory Taylor Blau
2021-08-24 16:16   ` [PATCH v4 09/25] midx: avoid opening multiple MIDXs when writing Taylor Blau
2021-08-24 16:16   ` [PATCH v4 10/25] pack-bitmap.c: introduce 'bitmap_num_objects()' Taylor Blau
2021-08-24 16:16   ` [PATCH v4 11/25] pack-bitmap.c: introduce 'nth_bitmap_object_oid()' Taylor Blau
2021-08-24 16:16   ` [PATCH v4 12/25] pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' Taylor Blau
2021-08-24 16:16   ` [PATCH v4 13/25] pack-bitmap.c: avoid redundant calls to try_partial_reuse Taylor Blau
2021-08-24 16:16   ` [PATCH v4 14/25] pack-bitmap: read multi-pack bitmaps Taylor Blau
2021-08-24 16:16   ` [PATCH v4 15/25] pack-bitmap: write " Taylor Blau
2021-08-24 16:16   ` [PATCH v4 16/25] t5310: move some tests to lib-bitmap.sh Taylor Blau
2021-08-24 16:16   ` [PATCH v4 17/25] t/helper/test-read-midx.c: add --checksum mode Taylor Blau
2021-08-24 16:16   ` [PATCH v4 18/25] t5326: test multi-pack bitmap behavior Taylor Blau
2021-08-24 16:16   ` [PATCH v4 19/25] t0410: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP Taylor Blau
2021-08-24 16:16   ` [PATCH v4 20/25] t5310: " Taylor Blau
2021-08-24 16:16   ` [PATCH v4 21/25] t5319: don't write MIDX bitmaps in t5319 Taylor Blau
2021-08-24 16:16   ` [PATCH v4 22/25] t7700: update to work with MIDX bitmap test knob Taylor Blau
2021-08-24 16:16   ` [PATCH v4 23/25] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' Taylor Blau
2021-08-24 16:16   ` [PATCH v4 24/25] p5310: extract full and partial bitmap tests Taylor Blau
2021-08-24 16:16   ` [PATCH v4 25/25] p5326: perf tests for MIDX bitmaps Taylor Blau
2021-08-25  0:28   ` [PATCH v4 00/25] multi-pack reachability bitmaps Jeff King
2021-08-25  2:10     ` Taylor Blau
2021-08-25  2:13       ` Taylor Blau
2021-08-25  7:36       ` Jeff King
2021-08-25  7:48         ` Johannes Berg
2021-08-26 18:49         ` Taylor Blau
2021-08-26 21:22           ` Taylor Blau
2021-08-27 21:30             ` Jeff King
2021-08-29 22:42               ` Junio C Hamano
2021-08-31 20:51 ` [PATCH v5 00/27] " Taylor Blau
2021-08-31 20:51   ` [PATCH v5 01/27] pack-bitmap.c: harden 'test_bitmap_walk()' to check type bitmaps Taylor Blau
2021-08-31 20:51   ` [PATCH v5 02/27] pack-bitmap-write.c: gracefully fail to write non-closed bitmaps Taylor Blau
2021-08-31 20:51   ` [PATCH v5 03/27] pack-bitmap-write.c: free existing bitmaps Taylor Blau
2021-08-31 20:51   ` [PATCH v5 04/27] Documentation: describe MIDX-based bitmaps Taylor Blau
2021-08-31 20:51   ` [PATCH v5 05/27] midx: disallow running outside of a repository Taylor Blau
2021-08-31 20:51   ` [PATCH v5 06/27] midx: fix `*.rev` cleanups with `--object-dir` Taylor Blau
2021-08-31 20:51   ` [PATCH v5 07/27] midx: clear auxiliary .rev after replacing the MIDX Taylor Blau
2021-08-31 20:52   ` [PATCH v5 08/27] midx: reject empty `--preferred-pack`'s Taylor Blau
2021-08-31 20:52   ` [PATCH v5 09/27] midx: infer preferred pack when not given one Taylor Blau
2021-08-31 20:52   ` [PATCH v5 10/27] midx: close linked MIDXs, avoid leaking memory Taylor Blau
2021-08-31 20:52   ` [PATCH v5 11/27] midx: avoid opening multiple MIDXs when writing Taylor Blau
2021-08-31 20:52   ` [PATCH v5 12/27] pack-bitmap.c: introduce 'bitmap_num_objects()' Taylor Blau
2021-08-31 20:52   ` [PATCH v5 13/27] pack-bitmap.c: introduce 'nth_bitmap_object_oid()' Taylor Blau
2021-08-31 20:52   ` [PATCH v5 14/27] pack-bitmap.c: introduce 'bitmap_is_preferred_refname()' Taylor Blau
2021-08-31 20:52   ` [PATCH v5 15/27] pack-bitmap.c: avoid redundant calls to try_partial_reuse Taylor Blau
2021-08-31 20:52   ` [PATCH v5 16/27] pack-bitmap: read multi-pack bitmaps Taylor Blau
2021-08-31 20:52   ` [PATCH v5 17/27] pack-bitmap: write " Taylor Blau
2021-08-31 20:52   ` [PATCH v5 18/27] t5310: move some tests to lib-bitmap.sh Taylor Blau
2021-08-31 20:52   ` [PATCH v5 19/27] t/helper/test-read-midx.c: add --checksum mode Taylor Blau
2021-08-31 20:52   ` [PATCH v5 20/27] t5326: test multi-pack bitmap behavior Taylor Blau
2021-08-31 20:52   ` [PATCH v5 21/27] t0410: disable GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP Taylor Blau
2021-08-31 20:52   ` [PATCH v5 22/27] t5310: " Taylor Blau
2021-08-31 20:52   ` [PATCH v5 23/27] t5319: don't write MIDX bitmaps in t5319 Taylor Blau
2021-08-31 20:52   ` [PATCH v5 24/27] t7700: update to work with MIDX bitmap test knob Taylor Blau
2021-08-31 20:52   ` [PATCH v5 25/27] midx: respect 'GIT_TEST_MULTI_PACK_INDEX_WRITE_BITMAP' Taylor Blau
2021-08-31 20:52   ` [PATCH v5 26/27] p5310: extract full and partial bitmap tests Taylor Blau
2021-08-31 20:52   ` [PATCH v5 27/27] p5326: perf tests for MIDX bitmaps Taylor Blau
2021-09-01 18:07   ` [PATCH v5 00/27] multi-pack reachability bitmaps Junio C Hamano
2021-09-01 19:08     ` Taylor Blau
2021-09-01 19:23       ` Junio C Hamano
2021-09-01 20:34         ` Taylor Blau
2021-09-01 20:49           ` Junio C Hamano
2021-09-01 20:54             ` Taylor Blau
2021-09-02  9:40             ` Jeff King
2021-09-02  9:38           ` Jeff King
2021-09-02  9:45   ` Jeff King

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