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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.
Martin Geisler - - Load All Authors

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test-strip-cross.t
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Matt Mackall
tests: unify test-strip-cross
 r12492 test stripping of filelogs where the linkrev doesn't always increase
$ echo '[extensions]' >> $HGRCPATH
Martin Geisler
tests: don't load unnecessary graphlog extension...
 r20117 $ echo 'strip =' >> $HGRCPATH
Matt Mackall
tests: unify test-strip-cross
 r12492 $ hg init orig
$ cd orig
$ commit()
> {
> hg up -qC null
> count=1
> for i in "$@"; do
Adrian Buehlmann
tests: fix tabs/indentation in test-strip-cross.t
 r12537 > for f in $i; do
> echo $count > $f
> done
> count=`expr $count + 1`
Matt Mackall
tests: unify test-strip-cross
 r12492 > done
> hg commit -qAm "$*"
> }
2 1 0 2 0 1 2
$ commit '201 210'
$ commit '102 120' '210'
$ commit '021'
$ commit '201' '021 120'
$ commit '012 021' '102 201' '120 210'
$ commit 'manifest-file'
$ commit '102 120' '012 210' '021 201'
$ commit '201 210' '021 120' '012 102'
$ HGUSER=another-user; export HGUSER
$ commit 'manifest-file'
$ commit '012' 'manifest-file'
$ cd ..
$ hg clone -q -U -r -1 -r -2 -r -3 -r -4 -r -6 orig crossed
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 $ cd crossed
Sune Foldager
debugindex etc.: add --changelog and --manifest options...
 r14323 $ hg debugindex --manifest
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 112 ..... 0 6f105cbb914d 000000000000 000000000000 (re)
1 112 56 ..... 3 1b55917b3699 000000000000 000000000000 (re)
2 168 123 ..... 1 8f3d04e263e5 000000000000 000000000000 (re)
3 291 122 ..... 2 f0ef8726ac4f 000000000000 000000000000 (re)
4 413 87 ..... 4 0b76e38b4070 000000000000 000000000000 (re)
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182
$ for i in 012 021 102 120 201 210 manifest-file; do
> echo $i
> hg debugindex $i
> echo
> done
012
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 0 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 1 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 2 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 021
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 0 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 2 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 1 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 102
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 1 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 0 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 2 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 120
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 1 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 2 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 0 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 201
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 2 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 0 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 1 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 210
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 2 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 1 5d9299349fc0 000000000000 000000000000 (re)
2 6 3 ..... 0 2661d26c6496 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 manifest-file
Bryan O'Sullivan
tests: reduce spurious failures when run with generaldelta...
 r17132 rev offset length ..... linkrev nodeid p1 p2 (re)
0 0 3 ..... 3 b8e02f643373 000000000000 000000000000 (re)
1 3 3 ..... 4 5d9299349fc0 000000000000 000000000000 (re)
Matt Mackall
tests: unify test-strip-cross
 r12492
Sune Foldager
tests: fix deprecated use of hg debugdata/debugindex...
 r14182 $ cd ..
Matt Mackall
tests: unify test-strip-cross
 r12492 $ for i in 0 1 2 3 4; do
> hg clone -q -U --pull crossed $i
> echo "% Trying to strip revision $i"
Mads Kiilerich
tests: remove redundant globs...
 r12640 > hg --cwd $i strip $i
Matt Mackall
tests: unify test-strip-cross
 r12492 > echo "% Verifying"
> hg --cwd $i verify
> echo
> done
% Trying to strip revision 0
Mads Kiilerich
tests: remove redundant globs...
 r12640 saved backup bundle to $TESTTMP/0/.hg/strip-backup/*-backup.hg (glob)
Matt Mackall
tests: unify test-strip-cross
 r12492 % Verifying
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
7 files, 4 changesets, 15 total revisions
% Trying to strip revision 1
Mads Kiilerich
tests: remove redundant globs...
 r12640 saved backup bundle to $TESTTMP/1/.hg/strip-backup/*-backup.hg (glob)
Matt Mackall
tests: unify test-strip-cross
 r12492 % Verifying
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
7 files, 4 changesets, 14 total revisions
% Trying to strip revision 2
Mads Kiilerich
tests: remove redundant globs...
 r12640 saved backup bundle to $TESTTMP/2/.hg/strip-backup/*-backup.hg (glob)
Matt Mackall
tests: unify test-strip-cross
 r12492 % Verifying
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
7 files, 4 changesets, 14 total revisions
% Trying to strip revision 3
Mads Kiilerich
tests: remove redundant globs...
 r12640 saved backup bundle to $TESTTMP/3/.hg/strip-backup/*-backup.hg (glob)
Matt Mackall
tests: unify test-strip-cross
 r12492 % Verifying
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
7 files, 4 changesets, 19 total revisions
% Trying to strip revision 4
Mads Kiilerich
tests: remove redundant globs...
 r12640 saved backup bundle to $TESTTMP/4/.hg/strip-backup/*-backup.hg (glob)
Matt Mackall
tests: unify test-strip-cross
 r12492 % Verifying
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
7 files, 4 changesets, 19 total revisions