tests/test-sparse-revlog.t
author Martin von Zweigbergk <martinvonz@google.com>
Wed, 02 Dec 2020 15:39:01 -0800
changeset 46010 61c1f29e7f4f
parent 41819 688fc33e105d
child 49225 58a814d062ca
permissions -rw-r--r--
rebase: clear merge state when aborting in-memory merge on dirty working copy Differential Revision: https://phab.mercurial-scm.org/D9509
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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====================================
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Test delta choice with sparse revlog
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====================================
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Sparse-revlog usually shows the most gain on Manifest. However, it is simpler
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to general an appropriate file, so we test with a single file instead. The
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goal is to observe intermediate snapshot being created.
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We need a large enough file. Part of the content needs to be replaced
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repeatedly while some of it changes rarely.
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  $ bundlepath="$TESTDIR/artifacts/cache/big-file-churn.hg"
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  $ expectedhash=`cat "$bundlepath".md5`
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#if slow
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  $ if [ ! -f "$bundlepath" ]; then
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  >     "$TESTDIR"/artifacts/scripts/generate-churning-bundle.py > /dev/null
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  > fi
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#else
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  $ if [ ! -f "$bundlepath" ]; then
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  >     echo 'skipped: missing artifact, run "'"$TESTDIR"'/artifacts/scripts/generate-churning-bundle.py"'
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  >     exit 80
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  > fi
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#endif
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  $ currenthash=`f -M "$bundlepath" | cut -d = -f 2`
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  $ if [ "$currenthash" != "$expectedhash" ]; then
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  >     echo 'skipped: outdated artifact, md5 "'"$currenthash"'" expected "'"$expectedhash"'" run "'"$TESTDIR"'/artifacts/scripts/generate-churning-bundle.py"'
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  >     exit 80
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  > fi
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  $ cat >> $HGRCPATH << EOF
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  > [format]
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  > sparse-revlog = yes
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  > maxchainlen = 15
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  > [storage]
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  > revlog.optimize-delta-parent-choice = yes
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  > revlog.reuse-external-delta = no
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  > EOF
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  $ hg init sparse-repo
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  $ cd sparse-repo
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  $ hg unbundle $bundlepath
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  adding changesets
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  adding manifests
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  adding file changes
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  added 5001 changesets with 5001 changes to 1 files (+89 heads)
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  new changesets 9706f5af64f4:d9032adc8114 (5001 drafts)
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  (run 'hg heads' to see heads, 'hg merge' to merge)
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  $ hg up
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  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
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  updated to "d9032adc8114: commit #5000"
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  89 other heads for branch "default"
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  $ hg log --stat -r 0:3
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  changeset:   0:9706f5af64f4
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  user:        test
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  date:        Thu Jan 01 00:00:00 1970 +0000
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  summary:     initial commit
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   SPARSE-REVLOG-TEST-FILE |  10500 ++++++++++++++++++++++++++++++++++++++++++++++
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   1 files changed, 10500 insertions(+), 0 deletions(-)
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  changeset:   1:724907deaa5e
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  user:        test
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  date:        Thu Jan 01 00:00:00 1970 +0000
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  summary:     commit #1
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   SPARSE-REVLOG-TEST-FILE |  1068 +++++++++++++++++++++++-----------------------
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   1 files changed, 534 insertions(+), 534 deletions(-)
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  changeset:   2:62c41bce3e5d
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  user:        test
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  date:        Thu Jan 01 00:00:00 1970 +0000
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  summary:     commit #2
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   SPARSE-REVLOG-TEST-FILE |  1068 +++++++++++++++++++++++-----------------------
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   1 files changed, 534 insertions(+), 534 deletions(-)
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  changeset:   3:348a9cbd6959
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  user:        test
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  date:        Thu Jan 01 00:00:00 1970 +0000
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  summary:     commit #3
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   SPARSE-REVLOG-TEST-FILE |  1068 +++++++++++++++++++++++-----------------------
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   1 files changed, 534 insertions(+), 534 deletions(-)
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  $ f -s .hg/store/data/*.d
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  .hg/store/data/_s_p_a_r_s_e-_r_e_v_l_o_g-_t_e_s_t-_f_i_l_e.d: size=63327412
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  $ hg debugrevlog *
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  format : 1
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  flags  : generaldelta
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  revisions     :     5001
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      merges    :      625 (12.50%)
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      normal    :     4376 (87.50%)
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  revisions     :     5001
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      empty     :        0 ( 0.00%)
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                     text  :        0 (100.00%)
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                     delta :        0 (100.00%)
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      snapshot  :      383 ( 7.66%)
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        lvl-0   :              3 ( 0.06%)
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        lvl-1   :             20 ( 0.40%)
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        lvl-2   :             68 ( 1.36%)
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   110
        lvl-3   :            112 ( 2.24%)
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   111
        lvl-4   :            180 ( 3.60%)
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   112
      deltas    :     4618 (92.34%)
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   113
  revision size : 63327412
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   114
      snapshot  :  9886710 (15.61%)
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   115
        lvl-0   :         603104 ( 0.95%)
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   116
        lvl-1   :        1559991 ( 2.46%)
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   117
        lvl-2   :        2295592 ( 3.62%)
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   118
        lvl-3   :        2531199 ( 4.00%)
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   119
        lvl-4   :        2896824 ( 4.57%)
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   120
      deltas    : 53440702 (84.39%)
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   121
  
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   122
  chunks        :     5001
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   123
      0x78 (x)  :     5001 (100.00%)
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   124
  chunks size   : 63327412
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   125
      0x78 (x)  : 63327412 (100.00%)
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   126
  
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   127
  avg chain length  :        9
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   128
  max chain length  :       15
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   129
  max chain reach   : 28248745
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   130
  compression ratio :       27
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   131
  
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   132
  uncompressed data size (min/max/avg) : 346468 / 346472 / 346471
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   133
  full revision size (min/max/avg)     : 201008 / 201050 / 201034
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   134
  inter-snapshot size (min/max/avg)    : 11596 / 168150 / 24430
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   135
      level-1   (min/max/avg)          : 16653 / 168150 / 77999
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   136
      level-2   (min/max/avg)          : 12951 / 85595 / 33758
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   137
      level-3   (min/max/avg)          : 11608 / 43029 / 22599
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   138
      level-4   (min/max/avg)          : 11596 / 21632 / 16093
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   139
  delta size (min/max/avg)             : 10649 / 107163 / 11572
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   140
  
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   141
  deltas against prev  : 3910 (84.67%)
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   142
      where prev = p1  : 3910     (100.00%)
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   143
      where prev = p2  :    0     ( 0.00%)
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   144
      other            :    0     ( 0.00%)
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   145
  deltas against p1    :  648 (14.03%)
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   146
  deltas against p2    :   60 ( 1.30%)
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   147
  deltas against other :    0 ( 0.00%)