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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-subrepo-missing.t
142 lines | 3.9 KiB | text/troff | Tads3Lexer
/ tests / test-subrepo-missing.t
$ hg init repo
$ cd repo
$ hg init subrepo
$ echo a > subrepo/a
$ hg -R subrepo ci -Am adda
adding a
$ echo 'subrepo = subrepo' > .hgsub
$ hg ci -Am addsubrepo
adding .hgsub
$ echo b > subrepo/b
$ hg -R subrepo ci -Am addb
adding b
$ hg ci -m updatedsub
ignore blanklines in .hgsubstate
>>> file('.hgsubstate', 'wb').write('\n\n \t \n \n')
$ hg st --subrepos
M .hgsubstate
$ hg revert -qC .hgsubstate
abort more gracefully on .hgsubstate parsing error
$ cp .hgsubstate .hgsubstate.old
>>> file('.hgsubstate', 'wb').write('\ninvalid')
$ hg st --subrepos --cwd $TESTTMP -R $TESTTMP/repo
abort: invalid subrepository revision specifier in 'repo/.hgsubstate' line 2
[255]
$ mv .hgsubstate.old .hgsubstate
delete .hgsub and revert it
$ rm .hgsub
$ hg revert .hgsub
warning: subrepo spec file '.hgsub' not found
warning: subrepo spec file '.hgsub' not found
warning: subrepo spec file '.hgsub' not found
delete .hgsubstate and revert it
$ rm .hgsubstate
$ hg revert .hgsubstate
delete .hgsub and update
$ rm .hgsub
$ hg up 0 --cwd $TESTTMP -R $TESTTMP/repo
warning: subrepo spec file 'repo/.hgsub' not found
warning: subrepo spec file 'repo/.hgsub' not found
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg st
warning: subrepo spec file '.hgsub' not found
! .hgsub
$ ls subrepo
a
delete .hgsubstate and update
$ hg up -C
warning: subrepo spec file '.hgsub' not found
warning: subrepo spec file '.hgsub' not found
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ rm .hgsubstate
$ hg up 0
other [destination] changed .hgsubstate which local [working copy] deleted
use (c)hanged version or leave (d)eleted? c
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg st
$ ls subrepo
a
Enable obsolete
$ cat >> $HGRCPATH << EOF
> [ui]
> logtemplate= {rev}:{node|short} {desc|firstline}
> [phases]
> publish=False
> [experimental]
> evolution=createmarkers
> EOF
check that we can update parent repo with missing (amended) subrepo revision
$ hg up --repository subrepo -r tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg ci -m "updated subrepo to tip"
created new head
$ cd subrepo
$ hg update -r tip
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo foo > a
$ hg commit --amend -m "addb (amended)"
$ cd ..
$ hg update --clean .
revision 102a90ea7b4a in subrepo subrepo is hidden
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
check that --hidden is propagated to the subrepo
$ hg -R subrepo up tip
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg ci -m 'commit with amended subrepo'
$ echo bar > subrepo/a
$ hg -R subrepo ci --amend -m "amend a (again)"
$ hg --hidden cat subrepo/a
foo
verify will warn if locked-in subrepo revisions are hidden or missing
$ hg ci -m "amended subrepo (again)"
$ hg --config extensions.strip= --hidden strip -R subrepo -qr 'tip'
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 5 changesets, 5 total revisions
checking subrepo links
subrepo 'subrepo' is hidden in revision a66de08943b6
subrepo 'subrepo' is hidden in revision 674d05939c1e
subrepo 'subrepo' not found in revision a7d05d9055a4
verifying shouldn't init a new subrepo if the reference doesn't exist
$ mv subrepo b
$ hg verify
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
2 files, 5 changesets, 5 total revisions
checking subrepo links
0: repository $TESTTMP/repo/subrepo not found (glob)
1: repository $TESTTMP/repo/subrepo not found (glob)
3: repository $TESTTMP/repo/subrepo not found (glob)
4: repository $TESTTMP/repo/subrepo not found (glob)
$ ls
b
$ mv b subrepo
$ cd ..