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perf: add command for measuring revlog chunk operations...
perf: add command for measuring revlog chunk operations Upcoming commits will teach revlogs to leverage the new compression engine API so that new compression formats can more easily be leveraged in revlogs. We want to be sure this refactoring doesn't regress performance. So this commit introduces "perfrevchunks" to explicitly test performance of reading, decompressing, and recompressing revlog chunks. Here is output when run on the mozilla-unified repo: $ hg perfrevlogchunks -c ! read ! wall 0.346603 comb 0.350000 user 0.340000 sys 0.010000 (best of 28) ! read w/ reused fd ! wall 0.337707 comb 0.340000 user 0.320000 sys 0.020000 (best of 30) ! read batch ! wall 0.013206 comb 0.020000 user 0.000000 sys 0.020000 (best of 221) ! read batch w/ reused fd ! wall 0.013259 comb 0.030000 user 0.010000 sys 0.020000 (best of 222) ! chunk ! wall 1.909939 comb 1.910000 user 1.900000 sys 0.010000 (best of 6) ! chunk batch ! wall 1.750677 comb 1.760000 user 1.740000 sys 0.020000 (best of 6) ! compress ! wall 5.668004 comb 5.670000 user 5.670000 sys 0.000000 (best of 3) $ hg perfrevlogchunks -m ! read ! wall 0.365834 comb 0.370000 user 0.350000 sys 0.020000 (best of 26) ! read w/ reused fd ! wall 0.350160 comb 0.350000 user 0.320000 sys 0.030000 (best of 28) ! read batch ! wall 0.024777 comb 0.020000 user 0.000000 sys 0.020000 (best of 119) ! read batch w/ reused fd ! wall 0.024895 comb 0.030000 user 0.000000 sys 0.030000 (best of 118) ! chunk ! wall 2.514061 comb 2.520000 user 2.480000 sys 0.040000 (best of 4) ! chunk batch ! wall 2.380788 comb 2.380000 user 2.360000 sys 0.020000 (best of 5) ! compress ! wall 9.815297 comb 9.820000 user 9.820000 sys 0.000000 (best of 3) We already see some interesting data, such as how much slower non-batched chunk reading is and that zlib compression appears to be >2x slower than decompression. I didn't have the data when I wrote this commit message, but I ran this on Mozilla's NFS-based Mercurial server and the time for reading with a reused file descriptor was faster. So I think it is worth testing both with and without file descriptor reuse so we can make informed decisions about recycling file descriptors.

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test-convert-bzr.t
288 lines | 6.3 KiB | text/troff | Tads3Lexer
#require bzr
$ . "$TESTDIR/bzr-definitions"
create and rename on the same file in the same step
$ mkdir test-createandrename
$ cd test-createandrename
$ bzr init -q source
test empty repo conversion (issue3233)
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
back to the rename stuff
$ cd source
$ echo a > a
$ echo c > c
$ echo e > e
$ bzr add -q a c e
$ bzr commit -q -m 'Initial add: a, c, e'
$ bzr mv a b
a => b
$ bzr mv c d
c => d
$ bzr mv e f
e => f
$ echo a2 >> a
$ mkdir e
$ bzr add -q a e
$ bzr commit -q -m 'rename a into b, create a, rename c into d'
$ cd ..
$ hg convert source source-hg
scanning source...
sorting...
converting...
1 Initial add: a, c, e
0 rename a into b, create a, rename c into d
$ glog -R source-hg
o 1@source "rename a into b, create a, rename c into d" files: a b c d e f
|
o 0@source "Initial add: a, c, e" files: a c e
manifest
$ hg manifest -R source-hg -r tip
a
b
d
f
test --rev option
$ hg convert -r 1 source source-1-hg
initializing destination source-1-hg repository
scanning source...
sorting...
converting...
0 Initial add: a, c, e
$ glog -R source-1-hg
o 0@source "Initial add: a, c, e" files: a c e
test with filemap
$ cat > filemap <<EOF
> exclude a
> EOF
$ hg convert --filemap filemap source source-filemap-hg
initializing destination source-filemap-hg repository
scanning source...
sorting...
converting...
1 Initial add: a, c, e
0 rename a into b, create a, rename c into d
$ hg -R source-filemap-hg manifest -r tip
b
d
f
convert from lightweight checkout
$ bzr checkout --lightweight source source-light
$ hg convert -s bzr source-light source-light-hg
initializing destination source-light-hg repository
warning: lightweight checkouts may cause conversion failures, try with a regular branch instead.
$TESTTMP/test-createandrename/source-light does not look like a Bazaar repository
abort: source-light: missing or unsupported repository
[255]
extract timestamps that look just like hg's {date|isodate}:
yyyy-mm-dd HH:MM zzzz (no seconds!)
compare timestamps
$ cd source
$ bzr log | \
> sed '/timestamp/!d;s/.\{15\}\([0-9: -]\{16\}\):.. \(.[0-9]\{4\}\)/\1 \2/' \
> > ../bzr-timestamps
$ cd ..
$ hg -R source-hg log --template "{date|isodate}\n" > hg-timestamps
$ cmp bzr-timestamps hg-timestamps || diff -u bzr-timestamps hg-timestamps
$ cd ..
merge
$ mkdir test-merge
$ cd test-merge
$ cat > helper.py <<EOF
> import sys
> from bzrlib import workingtree
> wt = workingtree.WorkingTree.open('.')
>
> message, stamp = sys.argv[1:]
> wt.commit(message, timestamp=int(stamp))
> EOF
$ bzr init -q source
$ cd source
$ echo content > a
$ echo content2 > b
$ bzr add -q a b
$ bzr commit -q -m 'Initial add'
$ cd ..
$ bzr branch -q source source-improve
$ cd source
$ echo more >> a
$ python ../helper.py 'Editing a' 100
$ cd ../source-improve
$ echo content3 >> b
$ python ../helper.py 'Editing b' 200
$ cd ../source
$ bzr merge -q ../source-improve
$ bzr commit -q -m 'Merged improve branch'
$ cd ..
$ hg convert --datesort source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
3 Initial add
2 Editing a
1 Editing b
0 Merged improve branch
$ glog -R source-hg
o 3@source "Merged improve branch" files:
|\
| o 2@source-improve "Editing b" files: b
| |
o | 1@source "Editing a" files: a
|/
o 0@source "Initial add" files: a b
$ cd ..
#if symlink execbit
symlinks and executable files
$ mkdir test-symlinks
$ cd test-symlinks
$ bzr init -q source
$ cd source
$ touch program
$ chmod +x program
$ ln -s program altname
$ mkdir d
$ echo a > d/a
$ ln -s a syma
$ bzr add -q altname program syma d/a
$ bzr commit -q -m 'Initial setup'
$ touch newprog
$ chmod +x newprog
$ rm altname
$ ln -s newprog altname
$ chmod -x program
$ bzr add -q newprog
$ bzr commit -q -m 'Symlink changed, x bits changed'
$ cd ..
$ hg convert source source-hg
initializing destination source-hg repository
scanning source...
sorting...
converting...
1 Initial setup
0 Symlink changed, x bits changed
$ manifest source-hg 0
% manifest of 0
644 @ altname
644 d/a
755 * program
644 @ syma
$ manifest source-hg tip
% manifest of tip
644 @ altname
644 d/a
755 * newprog
644 program
644 @ syma
test the symlinks can be recreated
$ cd source-hg
$ hg up
5 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg cat syma; echo
a
$ cd ../..
#endif
Multiple branches
$ bzr init-repo -q --no-trees repo
$ bzr init -q repo/trunk
$ bzr co repo/trunk repo-trunk
$ cd repo-trunk
$ echo a > a
$ bzr add -q a
$ bzr ci -qm adda
$ bzr tag trunk-tag
Created tag trunk-tag.
$ bzr switch -b branch
Tree is up to date at revision 1.
Switched to branch: *repo/branch/ (glob)
$ sleep 1
$ echo b > b
$ bzr add -q b
$ bzr ci -qm addb
$ bzr tag branch-tag
Created tag branch-tag.
$ bzr switch --force ../repo/trunk
Updated to revision 1.
Switched to branch: */repo/trunk/ (glob)
$ sleep 1
$ echo a >> a
$ bzr ci -qm changea
$ cd ..
$ hg convert --datesort repo repo-bzr
initializing destination repo-bzr repository
scanning source...
sorting...
converting...
2 adda
1 addb
0 changea
updating tags
$ (cd repo-bzr; glog)
o 3@default "update tags" files: .hgtags
|
o 2@default "changea" files: a
|
| o 1@branch "addb" files: b
|/
o 0@default "adda" files: a
Test tags (converted identifiers are not stable because bzr ones are
not and get incorporated in extra fields).
$ hg -R repo-bzr tags
tip 3:* (glob)
branch-tag 1:* (glob)
trunk-tag 0:* (glob)
Nested repositories (issue3254)
$ bzr init-repo -q --no-trees repo/inner
$ bzr init -q repo/inner/trunk
$ bzr co repo/inner/trunk inner-trunk
$ cd inner-trunk
$ echo b > b
$ bzr add -q b
$ bzr ci -qm addb
$ cd ..
$ hg convert --datesort repo noinner-bzr
initializing destination noinner-bzr repository
scanning source...
sorting...
converting...
2 adda
1 addb
0 changea
updating tags