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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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r22305:bdc0e04d merge default
r30451:94ca0e13 default
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test-import-merge.t
165 lines | 4.3 KiB | text/troff | Tads3Lexer
$ echo "[extensions]" >> $HGRCPATH
$ echo "mq=" >> $HGRCPATH
$ tipparents() {
> hg parents --template "{rev}:{node|short} {desc|firstline}\n" -r tip
> }
Test import and merge diffs
$ hg init repo
$ cd repo
$ echo a > a
$ hg ci -Am adda
adding a
$ echo a >> a
$ hg ci -m changea
$ echo c > c
$ hg ci -Am addc
adding c
$ hg up 0
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo b > b
$ hg ci -Am addb
adding b
created new head
$ hg up 1
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg merge 3
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m merge
$ hg export . > ../merge.diff
$ grep -v '^merge$' ../merge.diff > ../merge.nomsg.diff
$ cd ..
$ hg clone -r2 repo repo2
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 2 files
updating to branch default
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd repo2
$ hg pull -r3 ../repo
pulling from ../repo
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
(run 'hg heads' to see heads, 'hg merge' to merge)
Test without --exact and diff.p1 == workingdir.p1
$ hg up 1
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ cat > $TESTTMP/editor.sh <<EOF
> env | grep HGEDITFORM
> echo merge > \$1
> EOF
$ HGEDITOR="sh $TESTTMP/editor.sh" hg import --edit ../merge.nomsg.diff
applying ../merge.nomsg.diff
HGEDITFORM=import.normal.merge
$ tipparents
1:540395c44225 changea
3:102a90ea7b4a addb
$ hg strip --no-backup tip
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
Test without --exact and diff.p1 != workingdir.p1
$ hg up 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg import ../merge.diff
applying ../merge.diff
warning: import the patch as a normal revision
(use --exact to import the patch as a merge)
$ tipparents
2:890ecaa90481 addc
$ hg strip --no-backup tip
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
Test with --exact
$ hg import --exact ../merge.diff
applying ../merge.diff
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ tipparents
1:540395c44225 changea
3:102a90ea7b4a addb
$ hg strip --no-backup tip
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
Test with --bypass and diff.p1 == workingdir.p1
$ hg up 1
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg import --bypass ../merge.diff
applying ../merge.diff
$ tipparents
1:540395c44225 changea
3:102a90ea7b4a addb
$ hg strip --no-backup tip
Test with --bypass and diff.p1 != workingdir.p1
$ hg up 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg import --bypass ../merge.diff
applying ../merge.diff
warning: import the patch as a normal revision
(use --exact to import the patch as a merge)
$ tipparents
2:890ecaa90481 addc
$ hg strip --no-backup tip
Test with --bypass and --exact
$ hg import --bypass --exact ../merge.diff
applying ../merge.diff
$ tipparents
1:540395c44225 changea
3:102a90ea7b4a addb
$ hg strip --no-backup tip
$ cd ..
Test that --exact on a bad header doesn't corrupt the repo (issue3616)
$ hg init repo3
$ cd repo3
$ echo a>a
$ hg ci -Aqm0
$ echo a>>a
$ hg ci -m1
$ echo a>>a
$ hg ci -m2
$ echo a>a
$ echo b>>a
$ echo a>>a
$ hg ci -m3
$ hg export 2 | head -7 > ../a.patch
$ hg export tip > out
>>> apatch = open("../a.patch", "ab")
>>> apatch.write("".join(open("out").readlines()[7:]))
$ cd ..
$ hg clone -qr0 repo3 repo3-clone
$ cd repo3-clone
$ hg pull -qr1 ../repo3
$ hg import --exact ../a.patch
applying ../a.patch
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
patching file a
Hunk #1 succeeded at 1 with fuzz 1 (offset -1 lines).
transaction abort!
rollback completed
abort: patch is damaged or loses information
[255]
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 2 changesets, 2 total revisions