##// END OF EJS Templates
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.

File last commit:

r27192:a01d3d32 default
r30451:94ca0e13 default
Show More
test-fncache.t
417 lines | 11.6 KiB | text/troff | Tads3Lexer
Init repo1:
$ hg init repo1
$ cd repo1
$ echo "some text" > a
$ hg add
adding a
$ hg ci -m first
$ cat .hg/store/fncache | sort
data/a.i
Testing a.i/b:
$ mkdir a.i
$ echo "some other text" > a.i/b
$ hg add
adding a.i/b (glob)
$ hg ci -m second
$ cat .hg/store/fncache | sort
data/a.i
data/a.i.hg/b.i
Testing a.i.hg/c:
$ mkdir a.i.hg
$ echo "yet another text" > a.i.hg/c
$ hg add
adding a.i.hg/c (glob)
$ hg ci -m third
$ cat .hg/store/fncache | sort
data/a.i
data/a.i.hg.hg/c.i
data/a.i.hg/b.i
Testing verify:
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
3 files, 3 changesets, 3 total revisions
$ rm .hg/store/fncache
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
warning: revlog 'data/a.i' not in fncache!
warning: revlog 'data/a.i.hg/c.i' not in fncache!
warning: revlog 'data/a.i/b.i' not in fncache!
3 files, 3 changesets, 3 total revisions
3 warnings encountered!
hint: run "hg debugrebuildfncache" to recover from corrupt fncache
Follow the hint to make sure it works
$ hg debugrebuildfncache
adding data/a.i
adding data/a.i.hg/c.i
adding data/a.i/b.i
3 items added, 0 removed from fncache
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
3 files, 3 changesets, 3 total revisions
$ cd ..
Non store repo:
$ hg --config format.usestore=False init foo
$ cd foo
$ mkdir tst.d
$ echo foo > tst.d/foo
$ hg ci -Amfoo
adding tst.d/foo
$ find .hg | sort
.hg
.hg/00changelog.i
.hg/00manifest.i
.hg/cache
.hg/cache/branch2-served
.hg/cache/rbc-names-v1
.hg/cache/rbc-revs-v1
.hg/data
.hg/data/tst.d.hg
.hg/data/tst.d.hg/foo.i
.hg/dirstate
.hg/last-message.txt
.hg/phaseroots
.hg/requires
.hg/undo
.hg/undo.backup.dirstate
.hg/undo.backupfiles
.hg/undo.bookmarks
.hg/undo.branch
.hg/undo.desc
.hg/undo.dirstate
.hg/undo.phaseroots
$ cd ..
Non fncache repo:
$ hg --config format.usefncache=False init bar
$ cd bar
$ mkdir tst.d
$ echo foo > tst.d/Foo
$ hg ci -Amfoo
adding tst.d/Foo
$ find .hg | sort
.hg
.hg/00changelog.i
.hg/cache
.hg/cache/branch2-served
.hg/cache/rbc-names-v1
.hg/cache/rbc-revs-v1
.hg/dirstate
.hg/last-message.txt
.hg/requires
.hg/store
.hg/store/00changelog.i
.hg/store/00manifest.i
.hg/store/data
.hg/store/data/tst.d.hg
.hg/store/data/tst.d.hg/_foo.i
.hg/store/phaseroots
.hg/store/undo
.hg/store/undo.backupfiles
.hg/store/undo.phaseroots
.hg/undo.backup.dirstate
.hg/undo.bookmarks
.hg/undo.branch
.hg/undo.desc
.hg/undo.dirstate
$ cd ..
Encoding of reserved / long paths in the store
$ hg init r2
$ cd r2
$ cat <<EOF > .hg/hgrc
> [ui]
> portablefilenames = ignore
> EOF
$ hg import -q --bypass - <<EOF
> # HG changeset patch
> # User test
> # Date 0 0
> # Node ID 1c7a2f7cb77be1a0def34e4c7cabc562ad98fbd7
> # Parent 0000000000000000000000000000000000000000
> 1
>
> diff --git a/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12345-ABCDEFGHIJKLMNOPRSTUVWXYZ-abcdefghjiklmnopqrstuvwxyz b/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12345-ABCDEFGHIJKLMNOPRSTUVWXYZ-abcdefghjiklmnopqrstuvwxyz
> new file mode 100644
> --- /dev/null
> +++ b/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12345-ABCDEFGHIJKLMNOPRSTUVWXYZ-abcdefghjiklmnopqrstuvwxyz
> @@ -0,0 +1,1 @@
> +foo
> diff --git a/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH/TENTH/ELEVENTH/LOREMIPSUM.TXT b/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH/TENTH/ELEVENTH/LOREMIPSUM.TXT
> new file mode 100644
> --- /dev/null
> +++ b/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH/TENTH/ELEVENTH/LOREMIPSUM.TXT
> @@ -0,0 +1,1 @@
> +foo
> diff --git a/Project Planning/Resources/AnotherLongDirectoryName/Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt b/Project Planning/Resources/AnotherLongDirectoryName/Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt
> new file mode 100644
> --- /dev/null
> +++ b/Project Planning/Resources/AnotherLongDirectoryName/Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt
> @@ -0,0 +1,1 @@
> +foo
> diff --git a/bla.aux/prn/PRN/lpt/com3/nul/coma/foo.NUL/normal.c b/bla.aux/prn/PRN/lpt/com3/nul/coma/foo.NUL/normal.c
> new file mode 100644
> --- /dev/null
> +++ b/bla.aux/prn/PRN/lpt/com3/nul/coma/foo.NUL/normal.c
> @@ -0,0 +1,1 @@
> +foo
> diff --git a/enterprise/openesbaddons/contrib-imola/corba-bc/netbeansplugin/wsdlExtension/src/main/java/META-INF/services/org.netbeans.modules.xml.wsdl.bindingsupport.spi.ExtensibilityElementTemplateProvider b/enterprise/openesbaddons/contrib-imola/corba-bc/netbeansplugin/wsdlExtension/src/main/java/META-INF/services/org.netbeans.modules.xml.wsdl.bindingsupport.spi.ExtensibilityElementTemplateProvider
> new file mode 100644
> --- /dev/null
> +++ b/enterprise/openesbaddons/contrib-imola/corba-bc/netbeansplugin/wsdlExtension/src/main/java/META-INF/services/org.netbeans.modules.xml.wsdl.bindingsupport.spi.ExtensibilityElementTemplateProvider
> @@ -0,0 +1,1 @@
> +foo
> EOF
$ find .hg/store -name *.i | sort
.hg/store/00changelog.i
.hg/store/00manifest.i
.hg/store/data/bla.aux/pr~6e/_p_r_n/lpt/co~6d3/nu~6c/coma/foo._n_u_l/normal.c.i
.hg/store/dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxx168e07b38e65eff86ab579afaaa8e30bfbe0f35f.i
.hg/store/dh/au~78/second/x.prn/fourth/fi~3afth/sixth/seventh/eighth/nineth/tenth/loremia20419e358ddff1bf8751e38288aff1d7c32ec05.i
.hg/store/dh/enterpri/openesba/contrib-/corba-bc/netbeans/wsdlexte/src/main/java/org.net7018f27961fdf338a598a40c4683429e7ffb9743.i
.hg/store/dh/project_/resource/anotherl/followed/andanoth/andthenanextremelylongfilename0d8e1f4187c650e2f1fdca9fd90f786bc0976b6b.i
$ cd ..
Aborting lock does not prevent fncache writes
$ cat > exceptionext.py <<EOF
> import os
> from mercurial import commands, error
> from mercurial.extensions import wrapcommand, wrapfunction
>
> def lockexception(orig, vfs, lockname, wait, releasefn, *args, **kwargs):
> def releasewrap():
> l.held = False # ensure __del__ is a noop
> raise error.Abort("forced lock failure")
> l = orig(vfs, lockname, wait, releasewrap, *args, **kwargs)
> return l
>
> def reposetup(ui, repo):
> wrapfunction(repo, '_lock', lockexception)
>
> cmdtable = {}
>
> # wrap "commit" command to prevent wlock from being '__del__()'-ed
> # at the end of dispatching (for intentional "forced lcok failure")
> def commitwrap(orig, ui, repo, *pats, **opts):
> repo = repo.unfiltered() # to use replaced repo._lock certainly
> wlock = repo.wlock()
> try:
> return orig(ui, repo, *pats, **opts)
> finally:
> # multiple 'relase()' is needed for complete releasing wlock,
> # because "forced" abort at last releasing store lock
> # prevents wlock from being released at same 'lockmod.release()'
> for i in range(wlock.held):
> wlock.release()
>
> def extsetup(ui):
> wrapcommand(commands.table, "commit", commitwrap)
> EOF
$ extpath=`pwd`/exceptionext.py
$ hg init fncachetxn
$ cd fncachetxn
$ printf "[extensions]\nexceptionext=$extpath\n" >> .hg/hgrc
$ touch y
$ hg ci -qAm y
abort: forced lock failure
[255]
$ cat .hg/store/fncache
data/y.i
Aborting transaction prevents fncache change
$ cat > ../exceptionext.py <<EOF
> import os
> from mercurial import commands, error, localrepo
> from mercurial.extensions import wrapfunction
>
> def wrapper(orig, self, *args, **kwargs):
> tr = orig(self, *args, **kwargs)
> def fail(tr):
> raise error.Abort("forced transaction failure")
> # zzz prefix to ensure it sorted after store.write
> tr.addfinalize('zzz-forcefails', fail)
> return tr
>
> def uisetup(ui):
> wrapfunction(localrepo.localrepository, 'transaction', wrapper)
>
> cmdtable = {}
>
> EOF
$ rm -f "${extpath}c"
$ touch z
$ hg ci -qAm z
transaction abort!
rollback completed
abort: forced transaction failure
[255]
$ cat .hg/store/fncache
data/y.i
Aborted transactions can be recovered later
$ cat > ../exceptionext.py <<EOF
> import os
> from mercurial import commands, error, transaction, localrepo
> from mercurial.extensions import wrapfunction
>
> def trwrapper(orig, self, *args, **kwargs):
> tr = orig(self, *args, **kwargs)
> def fail(tr):
> raise error.Abort("forced transaction failure")
> # zzz prefix to ensure it sorted after store.write
> tr.addfinalize('zzz-forcefails', fail)
> return tr
>
> def abortwrapper(orig, self, *args, **kwargs):
> raise error.Abort("forced transaction failure")
>
> def uisetup(ui):
> wrapfunction(localrepo.localrepository, 'transaction', trwrapper)
> wrapfunction(transaction.transaction, '_abort', abortwrapper)
>
> cmdtable = {}
>
> EOF
$ rm -f "${extpath}c"
$ hg up -q 1
$ touch z
$ hg ci -qAm z 2>/dev/null
[255]
$ cat .hg/store/fncache | sort
data/y.i
data/z.i
$ hg recover
rolling back interrupted transaction
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
1 files, 1 changesets, 1 total revisions
$ cat .hg/store/fncache
data/y.i
$ cd ..
debugrebuildfncache does nothing unless repo has fncache requirement
$ hg --config format.usefncache=false init nofncache
$ cd nofncache
$ hg debugrebuildfncache
(not rebuilding fncache because repository does not support fncache)
$ cd ..
debugrebuildfncache works on empty repository
$ hg init empty
$ cd empty
$ hg debugrebuildfncache
fncache already up to date
$ cd ..
debugrebuildfncache on an up to date repository no-ops
$ hg init repo
$ cd repo
$ echo initial > foo
$ echo initial > .bar
$ hg commit -A -m initial
adding .bar
adding foo
$ cat .hg/store/fncache | sort
data/.bar.i
data/foo.i
$ hg debugrebuildfncache
fncache already up to date
debugrebuildfncache restores deleted fncache file
$ rm -f .hg/store/fncache
$ hg debugrebuildfncache
adding data/.bar.i
adding data/foo.i
2 items added, 0 removed from fncache
$ cat .hg/store/fncache | sort
data/.bar.i
data/foo.i
Rebuild after rebuild should no-op
$ hg debugrebuildfncache
fncache already up to date
A single missing file should get restored, an extra file should be removed
$ cat > .hg/store/fncache << EOF
> data/foo.i
> data/bad-entry.i
> EOF
$ hg debugrebuildfncache
removing data/bad-entry.i
adding data/.bar.i
1 items added, 1 removed from fncache
$ cat .hg/store/fncache | sort
data/.bar.i
data/foo.i
$ cd ..
Try a simple variation without dotencode to ensure fncache is ignorant of encoding
$ hg --config format.dotencode=false init nodotencode
$ cd nodotencode
$ echo initial > foo
$ echo initial > .bar
$ hg commit -A -m initial
adding .bar
adding foo
$ cat .hg/store/fncache | sort
data/.bar.i
data/foo.i
$ rm .hg/store/fncache
$ hg debugrebuildfncache
adding data/.bar.i
adding data/foo.i
2 items added, 0 removed from fncache
$ cat .hg/store/fncache | sort
data/.bar.i
data/foo.i