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Merge branch 'nd/pack-objects-pack-struct'

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"git pack-objects" needs to allocate tons of "struct object_entry"
while doing its work, and shrinking its size helps the performance
quite a bit.

* nd/pack-objects-pack-struct:
  ci: exercise the whole test suite with uncommon code in pack-objects
  pack-objects: reorder members to shrink struct object_entry
  pack-objects: shrink delta_size field in struct object_entry
  pack-objects: shrink size field in struct object_entry
  pack-objects: clarify the use of object_entry::size
  pack-objects: don't check size when the object is bad
  pack-objects: shrink z_delta_size field in struct object_entry
  pack-objects: refer to delta objects by index instead of pointer
  pack-objects: move in_pack out of struct object_entry
  pack-objects: move in_pack_pos out of struct object_entry
  pack-objects: use bitfield for object_entry::depth
  pack-objects: use bitfield for object_entry::dfs_state
  pack-objects: turn type and in_pack_type to bitfields
  pack-objects: a bit of document about struct object_entry
  read-cache.c: make $GIT_TEST_SPLIT_INDEX boolean
This commit is contained in:
Junio C Hamano
2018-05-23 14:38:19 +09:00
parent c67de747f4 f6a5576d52
commit ad635e82d6
16 changed files with 656 additions and 167 deletions
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22
t/README
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@ -293,6 +293,28 @@ and know what setup is needed for it. Or when you want to run
everything up to a certain test.
Running tests with special setups
---------------------------------
The whole test suite could be run to test some special features
that cannot be easily covered by a few specific test cases. These
could be enabled by running the test suite with correct GIT_TEST_
environment set.
GIT_TEST_SPLIT_INDEX=<boolean> forces split-index mode on the whole
test suite. Accept any boolean values that are accepted by git-config.
GIT_TEST_FULL_IN_PACK_ARRAY=<boolean> exercises the uncommon
pack-objects code path where there are more than 1024 packs even if
the actual number of packs in repository is below this limit. Accept
any boolean values that are accepted by git-config.
GIT_TEST_OE_SIZE=<n> exercises the uncommon pack-objects code path
where we do not cache object size in memory and read it from existing
packs on demand. This normally only happens when the object size is
over 2GB. This variable forces the code path on any object larger than
<n> bytes.
Naming Tests
------------

5
t/t5300-pack-object.sh
View File

@ -457,6 +457,11 @@ test_expect_success !PTHREADS,C_LOCALE_OUTPUT 'pack-objects --threads=N or pack.
grep -F "no threads support, ignoring pack.threads" err
'
test_expect_success 'pack-objects in too-many-packs mode' '
GIT_TEST_FULL_IN_PACK_ARRAY=1 git repack -ad &&
git fsck
'
#
# WARNING!
#