Mercurial > hg
view tests/test-rollback.t @ 42044:bb271ec2fbfb
compression: introduce a `storage.revlog.zstd.level` configuration
This option control the zstd compression level used when compressing revlog
chunk. The usage of zstd for revlog compression has not graduated from
experimental yet, but we intend to fix that soon.
The option name for the compression level is more straight forward to pick, so
this changesets comes first. Having a dedicated option for each compression
engine is useful because they don't support the same range of values.
I ran the same measurement as for the zlib compression level (in the parent
changesets). The variation in repository size is stay mostly in the same (small)
range. The "read/write" performance see smallish variation, but are overall much
better than zlib. Write performance show the same tend of having better write
performance for when reaching high-end compression.
Again, we don't intend to change the default zstd compression level (currently:
3) in this series. However this is worth investigating in the future.
The Performance comparison of zlib vs zstd is quite impressive. The repository
size stay in the same range, but the performance are much better in all
situations.
Comparison summary
==================
We are looking at:
- performance range for zlib
- performance range for zstd
- comparison of default zstd (level-3) to default zlib (level 6)
- comparison of the slowest zstd time to the fastest zlib time
Read performance:
-----------------
| zlib | zstd | cmp | f2s
mercurial | 0.170159 - 0.189219 | 0.144127 - 0.149624 | 80% | 88%
pypy | 2.679217 - 2.768691 | 1.532317 - 1.705044 | 60% | 63%
netbeans | 122.477027 - 141.620281 | 72.996346 - 89.731560 | 58% | 73%
mozilla | 147.867662 - 170.572118 | 91.700995 - 105.853099 | 56% | 71%
Write performance:
------------------
| zlib | zstd | cmp | f2s
mercurial | 53.250304 - 56.2936129 | 40.877025 - 45.677286 | 75% | 86%
pypy | 460.721984 - 476.589918 | 270.545409 - 301.002219 | 63% | 65%
netbeans | 520.560316 - 715.930400 | 370.356311 - 428.329652 | 55% | 82%
mozilla | 739.803002 - 987.056093 | 505.152906 - 591.930683 | 57% | 80%
Raw data
--------
repo alg lvl .hg/store size 00manifest.d read write
mercurial zlib 1 49,402,813 5,963,475 0.170159 53.250304
mercurial zlib 6 47,197,397 5,875,730 0.182820 56.264320
mercurial zlib 9 47,121,596 5,849,781 0.189219 56.293612
mercurial zstd 1 49,737,084 5,966,355 0.144127 40.877025
mercurial zstd 3 48,961,867 5,895,208 0.146376 42.268142
mercurial zstd 5 48,200,592 5,938,676 0.149624 43.162875
mercurial zstd 10 47,833,520 5,913,353 0.145185 44.012489
mercurial zstd 15 47,314,604 5,728,679 0.147686 45.677286
mercurial zstd 20 47,330,502 5,830,539 0.145789 45.025407
mercurial zstd 22 47,330,076 5,830,539 0.143996 44.690460
pypy zlib 1 370,830,572 28,462,425 2.679217 460.721984
pypy zlib 6 340,112,317 27,648,747 2.768691 467.537158
pypy zlib 9 338,360,736 27,639,003 2.763495 476.589918
pypy zstd 1 362,377,479 27,916,214 1.532317 270.545409
pypy zstd 3 354,137,693 27,905,988 1.686718 294.951509
pypy zstd 5 342,640,043 27,655,774 1.705044 301.002219
pypy zstd 10 334,224,327 27,164,493 1.567287 285.186239
pypy zstd 15 329,000,363 26,645,965 1.637729 299.561332
pypy zstd 20 324,534,039 26,199,547 1.526813 302.149827
pypy zstd 22 324,530,595 26,198,932 1.525718 307.821218
netbeans zlib 1 1,281,847,810 165,495,457 122.477027 520.560316
netbeans zlib 6 1,205,284,353 159,161,207 139.876147 715.930400
netbeans zlib 9 1,197,135,671 155,034,586 141.620281 678.297064
netbeans zstd 1 1,259,581,737 160,840,613 72.996346 370.356311
netbeans zstd 3 1,232,978,122 157,691,551 81.622317 396.733087
netbeans zstd 5 1,208,034,075 160,246,880 83.080549 364.342626
netbeans zstd 10 1,188,624,176 156,083,417 79.323935 403.594602
netbeans zstd 15 1,176,973,589 153,859,477 89.731560 428.329652
netbeans zstd 20 1,162,958,258 151,147,535 82.842667 392.335349
netbeans zstd 22 1,162,707,029 151,150,220 82.565695 402.840655
mozilla zlib 1 2,775,497,186 298,527,987 147.867662 751.263721
mozilla zlib 6 2,596,856,420 286,597,671 170.572118 987.056093
mozilla zlib 9 2,587,542,494 287,018,264 163.622338 739.803002
mozilla zstd 1 2,723,159,348 286,617,532 91.700995 570.042751
mozilla zstd 3 2,665,055,001 286,152,013 95.240155 561.412805
mozilla zstd 5 2,607,819,817 288,060,030 101.978048 505.152906
mozilla zstd 10 2,558,761,085 283,967,648 104.113481 497.771202
mozilla zstd 15 2,526,216,060 275,581,300 105.853099 591.930683
mozilla zstd 20 2,485,114,806 266,478,859 95.268795 576.515389
mozilla zstd 22 2,484,869,080 266,456,505 94.429282 572.785537
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Wed, 27 Mar 2019 18:35:59 +0100 |
parents | 57c462db87fd |
children | 7a4e1d245f19 |
line wrap: on
line source
setup repo $ hg init t $ cd t $ echo a > a $ hg commit -Am'add a' adding a $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 1 changesets with 1 changes to 1 files $ hg parents changeset: 0:1f0dee641bb7 tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 summary: add a rollback to null revision $ hg status $ hg rollback repository tip rolled back to revision -1 (undo commit) working directory now based on revision -1 $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 0 changesets with 0 changes to 0 files $ hg parents $ hg status A a Two changesets this time so we rollback to a real changeset $ hg commit -m'add a again' $ echo a >> a $ hg commit -m'modify a' Test issue 902 (current branch is preserved) $ hg branch test marked working directory as branch test (branches are permanent and global, did you want a bookmark?) $ hg rollback repository tip rolled back to revision 0 (undo commit) working directory now based on revision 0 $ hg branch default Test issue 1635 (commit message saved) $ cat .hg/last-message.txt ; echo modify a Test rollback of hg before issue 902 was fixed $ hg commit -m "test3" $ hg branch test marked working directory as branch test (branches are permanent and global, did you want a bookmark?) $ rm .hg/undo.branch $ hg rollback repository tip rolled back to revision 0 (undo commit) named branch could not be reset: current branch is still 'test' working directory now based on revision 0 $ hg branch test working dir unaffected by rollback: do not restore dirstate et. al. $ hg log --template '{rev} {branch} {desc|firstline}\n' 0 default add a again $ hg status M a $ hg bookmark foo $ hg commit -m'modify a again' $ echo b > b $ hg bookmark bar -r default #making bar active, before the transaction $ hg commit -Am'add b' adding b $ hg log --template '{rev} {branch} {desc|firstline}\n' 2 test add b 1 test modify a again 0 default add a again $ hg update bar 1 files updated, 0 files merged, 1 files removed, 0 files unresolved (activating bookmark bar) $ cat .hg/undo.branch ; echo test $ hg rollback -f repository tip rolled back to revision 1 (undo commit) $ hg id -n 0 $ hg branch default $ cat .hg/bookmarks.current ; echo bar $ hg bookmark --delete foo bar rollback by pretxncommit saves commit message (issue1635) $ echo a >> a $ hg --config hooks.pretxncommit=false commit -m"precious commit message" transaction abort! rollback completed abort: pretxncommit hook exited with status * (glob) [255] $ cat .hg/last-message.txt ; echo precious commit message same thing, but run $EDITOR $ cat > editor.sh << '__EOF__' > echo "another precious commit message" > "$1" > __EOF__ $ HGEDITOR="\"sh\" \"`pwd`/editor.sh\"" hg --config hooks.pretxncommit=false commit 2>&1 transaction abort! rollback completed note: commit message saved in .hg/last-message.txt abort: pretxncommit hook exited with status * (glob) [255] $ cat .hg/last-message.txt another precious commit message test rollback on served repository #if serve $ hg commit -m "precious commit message" $ hg serve -p $HGPORT -d --pid-file=hg.pid -A access.log -E errors.log $ cat hg.pid >> $DAEMON_PIDS $ cd .. $ hg clone http://localhost:$HGPORT u requesting all changes adding changesets adding manifests adding file changes added 3 changesets with 2 changes to 1 files (+1 heads) new changesets 23b0221f3370:068774709090 updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ cd u $ hg id default 068774709090 now rollback and observe that 'hg serve' reloads the repository and presents the correct tip changeset: $ hg -R ../t rollback repository tip rolled back to revision 1 (undo commit) working directory now based on revision 0 $ hg id default 791dd2169706 $ killdaemons.py #endif update to older changeset and then refuse rollback, because that would lose data (issue2998) $ cd ../t $ hg -q update $ rm `hg status -un` $ template='{rev}:{node|short} [{branch}] {desc|firstline}\n' $ echo 'valuable new file' > b $ echo 'valuable modification' >> a $ hg commit -A -m'a valuable change' adding b $ hg update 0 1 files updated, 0 files merged, 1 files removed, 0 files unresolved $ hg rollback abort: rollback of last commit while not checked out may lose data (use -f to force) [255] $ hg tip -q 2:4d9cd3795eea $ hg rollback -f repository tip rolled back to revision 1 (undo commit) $ hg status $ hg log --removed b # yep, it's gone same again, but emulate an old client that doesn't write undo.desc $ hg -q update $ echo 'valuable modification redux' >> a $ hg commit -m'a valuable change redux' $ rm .hg/undo.desc $ hg update 0 1 files updated, 0 files merged, 0 files removed, 0 files unresolved $ hg rollback rolling back unknown transaction $ cat a a corrupt journal test $ echo "foo" > .hg/store/journal $ hg recover rolling back interrupted transaction couldn't read journal entry 'foo\n'! checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 2 changesets with 2 changes to 1 files rollback disabled by config $ cat >> $HGRCPATH <<EOF > [ui] > rollback = false > EOF $ echo narf >> pinky-sayings.txt $ hg add pinky-sayings.txt $ hg ci -m 'First one.' $ hg rollback abort: rollback is disabled because it is unsafe (see `hg help -v rollback` for information) [255] $ cd .. I/O errors on stdio are handled properly (issue5658) $ cat > badui.py << EOF > import errno > from mercurial.i18n import _ > from mercurial import ( > error, > registrar, > ui as uimod, > ) > > configtable = {} > configitem = registrar.configitem(configtable) > > configitem(b'ui', b'ioerrors', > default=list, > ) > > def pretxncommit(ui, repo, **kwargs): > ui.warn(b'warn during pretxncommit\n') > > def pretxnclose(ui, repo, **kwargs): > ui.warn(b'warn during pretxnclose\n') > > def txnclose(ui, repo, **kwargs): > ui.warn(b'warn during txnclose\n') > > def txnabort(ui, repo, **kwargs): > ui.warn(b'warn during abort\n') > > class fdproxy(object): > def __init__(self, ui, o): > self._ui = ui > self._o = o > > def __getattr__(self, attr): > return getattr(self._o, attr) > > def write(self, msg): > errors = set(self._ui.configlist(b'ui', b'ioerrors')) > pretxncommit = msg == b'warn during pretxncommit\n' > pretxnclose = msg == b'warn during pretxnclose\n' > txnclose = msg == b'warn during txnclose\n' > txnabort = msg == b'warn during abort\n' > msgabort = msg == _(b'transaction abort!\n') > msgrollback = msg == _(b'rollback completed\n') > > if pretxncommit and b'pretxncommit' in errors: > raise IOError(errno.EPIPE, 'simulated epipe') > if pretxnclose and b'pretxnclose' in errors: > raise IOError(errno.EIO, 'simulated eio') > if txnclose and b'txnclose' in errors: > raise IOError(errno.EBADF, 'simulated badf') > if txnabort and b'txnabort' in errors: > raise IOError(errno.EPIPE, 'simulated epipe') > if msgabort and b'msgabort' in errors: > raise IOError(errno.EBADF, 'simulated ebadf') > if msgrollback and b'msgrollback' in errors: > raise IOError(errno.EIO, 'simulated eio') > > return self._o.write(msg) > > def uisetup(ui): > class badui(ui.__class__): > def _write(self, dest, *args, **kwargs): > olderr = self.ferr > try: > if dest is self.ferr: > self.ferr = dest = fdproxy(self, olderr) > return super(badui, self)._write(dest, *args, **kwargs) > finally: > self.ferr = olderr > > ui.__class__ = badui > > def reposetup(ui, repo): > ui.setconfig(b'hooks', b'pretxnclose.badui', pretxnclose, b'badui') > ui.setconfig(b'hooks', b'txnclose.badui', txnclose, b'badui') > ui.setconfig(b'hooks', b'pretxncommit.badui', pretxncommit, b'badui') > ui.setconfig(b'hooks', b'txnabort.badui', txnabort, b'badui') > EOF $ cat >> $HGRCPATH << EOF > [extensions] > badui = $TESTTMP/badui.py > EOF An I/O error during pretxncommit is handled $ hg init ioerror-pretxncommit $ cd ioerror-pretxncommit $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=pretxncommit commit -m 'error during pretxncommit' warn during pretxnclose warn during txnclose $ hg commit -m 'commit 1' nothing changed [1] $ cd .. An I/O error during pretxnclose is handled $ hg init ioerror-pretxnclose $ cd ioerror-pretxnclose $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=pretxnclose commit -m 'error during pretxnclose' warn during pretxncommit warn during txnclose $ hg commit -m 'commit 1' nothing changed [1] $ cd .. An I/O error during txnclose is handled $ hg init ioerror-txnclose $ cd ioerror-txnclose $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=txnclose commit -m 'error during txnclose' warn during pretxncommit warn during pretxnclose $ hg commit -m 'commit 1' nothing changed [1] $ cd .. An I/O error writing "transaction abort" is handled $ hg init ioerror-msgabort $ cd ioerror-msgabort $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=msgabort --config hooks.pretxncommit=false commit -m 'error during abort message' warn during abort rollback completed abort: pretxncommit hook exited with status 1 [255] $ hg commit -m 'commit 1' warn during pretxncommit warn during pretxnclose warn during txnclose $ cd .. An I/O error during txnabort should still result in rollback $ hg init ioerror-txnabort $ cd ioerror-txnabort $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=txnabort --config hooks.pretxncommit=false commit -m 'error during abort' transaction abort! rollback completed abort: pretxncommit hook exited with status 1 [255] $ hg commit -m 'commit 1' warn during pretxncommit warn during pretxnclose warn during txnclose $ cd .. An I/O error writing "rollback completed" is handled $ hg init ioerror-msgrollback $ cd ioerror-msgrollback $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=msgrollback --config hooks.pretxncommit=false commit -m 'error during rollback message' transaction abort! warn during abort abort: pretxncommit hook exited with status 1 [255] $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 1 changesets with 1 changes to 1 files $ cd .. Multiple I/O errors after transaction open are handled. This is effectively what happens if a peer disconnects in the middle of a transaction. $ hg init ioerror-multiple $ cd ioerror-multiple $ echo 0 > foo $ hg -q commit -A -m initial warn during pretxncommit warn during pretxnclose warn during txnclose $ echo 1 > foo $ hg --config ui.ioerrors=pretxncommit,pretxnclose,txnclose,txnabort,msgabort,msgrollback commit -m 'multiple errors' $ hg verify checking changesets checking manifests crosschecking files in changesets and manifests checking files checked 2 changesets with 2 changes to 1 files $ cd ..