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| author | Junio C Hamano <gitster@pobox.com> | 2024-01-12 16:09:56 -0800 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2024-01-12 16:09:56 -0800 |
| commit | 0fea6b73f1771469cc423288fcd754d374865400 (patch) | |
| tree | ead5e63ecb0371557bf920fdd0e150d87219877b /t/perf | |
| parent | 0ebbaa07d0c19b2ade6fed9660e10dcf834fc922 (diff) | |
| parent | ba47d88795e12193e7b0fffc5130757a5517a5da (diff) | |
| download | git-0fea6b73f1771469cc423288fcd754d374865400.tar.gz | |
Merge branch 'tb/multi-pack-verbatim-reuse'
Streaming spans of packfile data used to be done only from a
single, primary, pack in a repository with multiple packfiles. It
has been extended to allow reuse from other packfiles, too.
* tb/multi-pack-verbatim-reuse: (26 commits)
t/perf: add performance tests for multi-pack reuse
pack-bitmap: enable reuse from all bitmapped packs
pack-objects: allow setting `pack.allowPackReuse` to "single"
t/test-lib-functions.sh: implement `test_trace2_data` helper
pack-objects: add tracing for various packfile metrics
pack-bitmap: prepare to mark objects from multiple packs for reuse
pack-revindex: implement `midx_pair_to_pack_pos()`
pack-revindex: factor out `midx_key_to_pack_pos()` helper
midx: implement `midx_preferred_pack()`
git-compat-util.h: implement checked size_t to uint32_t conversion
pack-objects: include number of packs reused in output
pack-objects: prepare `write_reused_pack_verbatim()` for multi-pack reuse
pack-objects: prepare `write_reused_pack()` for multi-pack reuse
pack-objects: pass `bitmapped_pack`'s to pack-reuse functions
pack-objects: keep track of `pack_start` for each reuse pack
pack-objects: parameterize pack-reuse routines over a single pack
pack-bitmap: return multiple packs via `reuse_partial_packfile_from_bitmap()`
pack-bitmap: simplify `reuse_partial_packfile_from_bitmap()` signature
ewah: implement `bitmap_is_empty()`
pack-bitmap: pass `bitmapped_pack` struct to pack-reuse functions
...
Diffstat (limited to 't/perf')
| -rwxr-xr-x | t/perf/p5332-multi-pack-reuse.sh | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/t/perf/p5332-multi-pack-reuse.sh b/t/perf/p5332-multi-pack-reuse.sh new file mode 100755 index 0000000000..5c6c575d62 --- /dev/null +++ b/t/perf/p5332-multi-pack-reuse.sh @@ -0,0 +1,81 @@ +#!/bin/sh + +test_description='tests pack performance with multi-pack reuse' + +. ./perf-lib.sh +. "${TEST_DIRECTORY}/perf/lib-pack.sh" + +packdir=.git/objects/pack + +test_perf_large_repo + +find_pack () { + for idx in $packdir/pack-*.idx + do + if git show-index <$idx | grep -q "$1" + then + basename $idx + fi || return 1 + done +} + +repack_into_n_chunks () { + git repack -adk && + + test "$1" -eq 1 && return || + + find $packdir -type f | sort >packs.before && + + # partition the repository into $1 chunks of consecutive commits, and + # then create $1 packs with the objects reachable from each chunk + # (excluding any objects reachable from the previous chunks) + sz="$(($(git rev-list --count --all) / $1))" + for rev in $(git rev-list --all | awk "NR % $sz == 0" | tac) + do + pack="$(echo "$rev" | git pack-objects --revs \ + --honor-pack-keep --delta-base-offset $packdir/pack)" && + touch $packdir/pack-$pack.keep || return 1 + done + + # grab any remaining objects not packed by the previous step(s) + git pack-objects --revs --all --honor-pack-keep --delta-base-offset \ + $packdir/pack && + + find $packdir -type f | sort >packs.after && + + # and install the whole thing + for f in $(comm -12 packs.before packs.after) + do + rm -f "$f" || return 1 + done + rm -fr $packdir/*.keep +} + +for nr_packs in 1 10 100 +do + test_expect_success "create $nr_packs-pack scenario" ' + repack_into_n_chunks $nr_packs + ' + + test_expect_success "setup bitmaps for $nr_packs-pack scenario" ' + find $packdir -type f -name "*.idx" | sed -e "s/.*\/\(.*\)$/+\1/g" | + git multi-pack-index write --stdin-packs --bitmap \ + --preferred-pack="$(find_pack $(git rev-parse HEAD))" + ' + + for reuse in single multi + do + test_perf "clone for $nr_packs-pack scenario ($reuse-pack reuse)" " + git for-each-ref --format='%(objectname)' refs/heads refs/tags >in && + git -c pack.allowPackReuse=$reuse pack-objects \ + --revs --delta-base-offset --use-bitmap-index \ + --stdout <in >result + " + + test_size "clone size for $nr_packs-pack scenario ($reuse-pack reuse)" ' + wc -c <result + ' + done +done + +test_done |