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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-svn-sink.t
468 lines | 8.5 KiB | text/troff | Tads3Lexer
/ tests / test-convert-svn-sink.t
#require svn13
$ svnupanddisplay()
> {
> (
> cd $1;
> svn up -q;
> svn st -v | sed 's/ */ /g' | sort
> limit=''
> if [ $2 -gt 0 ]; then
> limit="--limit=$2"
> fi
> svn log --xml -v $limit | python "$TESTDIR/svnxml.py"
> )
> }
$ cat >> $HGRCPATH <<EOF
> [extensions]
> convert =
> EOF
$ hg init a
Add
$ echo a > a/a
$ mkdir -p a/d1/d2
$ echo b > a/d1/d2/b
$ hg --cwd a ci -d '0 0' -A -m 'add a file'
adding a
adding d1/d2/b
Modify
$ svn-safe-append.py a a/a
$ hg --cwd a ci -d '1 0' -m 'modify a file'
$ hg --cwd a tip -q
1:e0e2b8a9156b
$ hg convert -d svn a
assuming destination a-hg
initializing svn repository 'a-hg'
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
1 add a file
0 modify a file
$ svnupanddisplay a-hg-wc 2
2 1 test d1
2 1 test d1/d2 (glob)
2 1 test d1/d2/b (glob)
2 2 test .
2 2 test a
revision: 2
author: test
msg: modify a file
M /a
revision: 1
author: test
msg: add a file
A /a
A /d1
A /d1/d2
A /d1/d2/b
$ ls a a-hg-wc
a:
a
d1
a-hg-wc:
a
d1
$ cmp a/a a-hg-wc/a
Rename
$ hg --cwd a mv a b
$ hg --cwd a ci -d '2 0' -m 'rename a file'
$ hg --cwd a tip -q
2:eb5169441d43
$ hg convert -d svn a
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 rename a file
$ svnupanddisplay a-hg-wc 1
3 1 test d1
3 1 test d1/d2 (glob)
3 1 test d1/d2/b (glob)
3 3 test .
3 3 test b
revision: 3
author: test
msg: rename a file
D /a
A /b (from /a@2)
$ ls a a-hg-wc
a:
b
d1
a-hg-wc:
b
d1
Copy
$ hg --cwd a cp b c
$ hg --cwd a ci -d '3 0' -m 'copy a file'
$ hg --cwd a tip -q
3:60effef6ab48
$ hg convert -d svn a
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 copy a file
$ svnupanddisplay a-hg-wc 1
4 1 test d1
4 1 test d1/d2 (glob)
4 1 test d1/d2/b (glob)
4 3 test b
4 4 test .
4 4 test c
revision: 4
author: test
msg: copy a file
A /c (from /b@3)
$ ls a a-hg-wc
a:
b
c
d1
a-hg-wc:
b
c
d1
$ hg --cwd a rm b
Remove
$ hg --cwd a ci -d '4 0' -m 'remove a file'
$ hg --cwd a tip -q
4:87bbe3013fb6
$ hg convert -d svn a
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 remove a file
$ svnupanddisplay a-hg-wc 1
5 1 test d1
5 1 test d1/d2 (glob)
5 1 test d1/d2/b (glob)
5 4 test c
5 5 test .
revision: 5
author: test
msg: remove a file
D /b
$ ls a a-hg-wc
a:
c
d1
a-hg-wc:
c
d1
Executable
#if execbit
$ chmod +x a/c
#else
$ echo fake >> a/c
#endif
$ hg --cwd a ci -d '5 0' -m 'make a file executable'
#if execbit
$ hg --cwd a tip -q
5:ff42e473c340
#else
$ hg --cwd a tip -q
5:817a700c8cf1
#endif
$ hg convert -d svn a
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 make a file executable
$ svnupanddisplay a-hg-wc 1
6 1 test d1
6 1 test d1/d2 (glob)
6 1 test d1/d2/b (glob)
6 6 test .
6 6 test c
revision: 6
author: test
msg: make a file executable
M /c
#if execbit
$ test -x a-hg-wc/c
#endif
#if symlink
Symlinks
$ ln -s a/missing a/link
$ hg --cwd a commit -Am 'add symlink'
adding link
$ hg --cwd a mv link newlink
$ hg --cwd a commit -m 'move symlink'
$ hg convert -d svn a a-svnlink
initializing svn repository 'a-svnlink'
initializing svn working copy 'a-svnlink-wc'
scanning source...
sorting...
converting...
7 add a file
6 modify a file
5 rename a file
4 copy a file
3 remove a file
2 make a file executable
1 add symlink
0 move symlink
$ svnupanddisplay a-svnlink-wc 1
8 1 test d1
8 1 test d1/d2
8 1 test d1/d2/b
8 6 test c
8 8 test .
8 8 test newlink
revision: 8
author: test
msg: move symlink
D /link
A /newlink (from /link@7)
Make sure our changes don't affect the rest of the test cases
$ hg --cwd a up 5
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg --cwd a --config extensions.strip= strip -r 6
saved backup bundle to $TESTTMP/a/.hg/strip-backup/bd4f7b7a7067-ed505e42-backup.hg (glob)
#endif
Convert with --full adds and removes files that didn't change
$ touch a/f
$ hg -R a ci -Aqmf
$ echo "rename c d" > filemap
$ hg convert -d svn a --filemap filemap --full
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 f
$ svnupanddisplay a-hg-wc 1
7 7 test .
7 7 test d
7 7 test f
revision: 7
author: test
msg: f
D /c
A /d
D /d1
A /f
$ rm -rf a a-hg a-hg-wc
Executable in new directory
$ hg init a
$ mkdir a/d1
$ echo a > a/d1/a
#if execbit
$ chmod +x a/d1/a
#else
$ echo fake >> a/d1/a
#endif
$ hg --cwd a ci -d '0 0' -A -m 'add executable file in new directory'
adding d1/a
$ hg convert -d svn a
assuming destination a-hg
initializing svn repository 'a-hg'
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 add executable file in new directory
$ svnupanddisplay a-hg-wc 1
1 1 test .
1 1 test d1
1 1 test d1/a (glob)
revision: 1
author: test
msg: add executable file in new directory
A /d1
A /d1/a
#if execbit
$ test -x a-hg-wc/d1/a
#endif
Copy to new directory
$ mkdir a/d2
$ hg --cwd a cp d1/a d2/a
$ hg --cwd a ci -d '1 0' -A -m 'copy file to new directory'
$ hg convert -d svn a
assuming destination a-hg
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
0 copy file to new directory
$ svnupanddisplay a-hg-wc 1
2 1 test d1
2 1 test d1/a (glob)
2 2 test .
2 2 test d2
2 2 test d2/a (glob)
revision: 2
author: test
msg: copy file to new directory
A /d2
A /d2/a (from /d1/a@1)
Branchy history
$ hg init b
$ echo base > b/b
$ hg --cwd b ci -d '0 0' -Ambase
adding b
$ svn-safe-append.py left-1 b/b
$ echo left-1 > b/left-1
$ hg --cwd b ci -d '1 0' -Amleft-1
adding left-1
$ svn-safe-append.py left-2 b/b
$ echo left-2 > b/left-2
$ hg --cwd b ci -d '2 0' -Amleft-2
adding left-2
$ hg --cwd b up 0
1 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ svn-safe-append.py right-1 b/b
$ echo right-1 > b/right-1
$ hg --cwd b ci -d '3 0' -Amright-1
adding right-1
created new head
$ svn-safe-append.py right-2 b/b
$ echo right-2 > b/right-2
$ hg --cwd b ci -d '4 0' -Amright-2
adding right-2
$ hg --cwd b up -C 2
3 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg --cwd b merge
merging b
warning: conflicts while merging b! (edit, then use 'hg resolve --mark')
2 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
[1]
$ hg --cwd b revert -r 2 b
$ hg --cwd b resolve -m b
(no more unresolved files)
$ hg --cwd b ci -d '5 0' -m 'merge'
Expect 4 changes
$ hg convert -d svn b
assuming destination b-hg
initializing svn repository 'b-hg'
initializing svn working copy 'b-hg-wc'
scanning source...
sorting...
converting...
5 base
4 left-1
3 left-2
2 right-1
1 right-2
0 merge
$ svnupanddisplay b-hg-wc 0
4 2 test left-1
4 3 test b
4 3 test left-2
4 4 test .
4 4 test right-1
4 4 test right-2
revision: 4
author: test
msg: merge
A /right-1
A /right-2
revision: 3
author: test
msg: left-2
M /b
A /left-2
revision: 2
author: test
msg: left-1
M /b
A /left-1
revision: 1
author: test
msg: base
A /b
Tags are not supported, but must not break conversion
$ rm -rf a a-hg a-hg-wc
$ hg init a
$ echo a > a/a
$ hg --cwd a ci -d '0 0' -A -m 'Add file a'
adding a
$ hg --cwd a tag -d '1 0' -m 'Tagged as v1.0' v1.0
$ hg convert -d svn a
assuming destination a-hg
initializing svn repository 'a-hg'
initializing svn working copy 'a-hg-wc'
scanning source...
sorting...
converting...
1 Add file a
0 Tagged as v1.0
writing Subversion tags is not yet implemented
$ svnupanddisplay a-hg-wc 2
2 1 test a
2 2 test .
2 2 test .hgtags
revision: 2
author: test
msg: Tagged as v1.0
A /.hgtags
revision: 1
author: test
msg: Add file a
A /a
$ rm -rf a a-hg a-hg-wc