view tests/test-narrow-trackedcmd.t @ 44363:f7459da77f23

nodemap: introduce an option to use mmap to read the nodemap mapping The performance and memory benefit is much greater if we don't have to copy all the data in memory for each information. So we introduce an option (on by default) to read the data using mmap. This changeset is the last one definition the API for index support nodemap data. (they have to be able to use the mmaping). Below are some benchmark comparing the best we currently have in 5.3 with the final step of this series (using the persistent nodemap implementation in Rust). The benchmark run `hg perfindex` with various revset and the following variants: Before: * do not use the persistent nodemap * use the CPython implementation of the index for nodemap * use mmapping of the changelog index After: * use the MixedIndex Rust code, with the NodeTree object for nodemap access (still in review) * use the persistent nodemap data from disk * access the persistent nodemap data through mmap * use mmapping of the changelog index The persistent nodemap greatly speed up most operation on very large repositories. Some of the previously very fast lookup end up a bit slower because the persistent nodemap has to be setup. However the absolute slowdown is very small and won't matters in the big picture. Here are some numbers (in seconds) for the reference copy of mozilla-try: Revset Before After abs-change speedup -10000: 0.004622 0.005532 0.000910 × 0.83 -10: 0.000050 0.000132 0.000082 × 0.37 tip 0.000052 0.000085 0.000033 × 0.61 0 + (-10000:) 0.028222 0.005337 -0.022885 × 5.29 0 0.023521 0.000084 -0.023437 × 280.01 (-10000:) + 0 0.235539 0.005308 -0.230231 × 44.37 (-10:) + :9 0.232883 0.000180 -0.232703 ×1293.79 (-10000:) + (:99) 0.238735 0.005358 -0.233377 × 44.55 :99 + (-10000:) 0.317942 0.005593 -0.312349 × 56.84 :9 + (-10:) 0.313372 0.000179 -0.313193 ×1750.68 :9 0.316450 0.000143 -0.316307 ×2212.93 On smaller repositories, the cost of nodemap related operation is not as big, so the win is much more modest. Yet it helps shaving a handful of millisecond here and there. Here are some numbers (in seconds) for the reference copy of mercurial: Revset Before After abs-change speedup -10: 0.000065 0.000097 0.000032 × 0.67 tip 0.000063 0.000078 0.000015 × 0.80 0 0.000561 0.000079 -0.000482 × 7.10 -10000: 0.004609 0.003648 -0.000961 × 1.26 0 + (-10000:) 0.005023 0.003715 -0.001307 × 1.35 (-10:) + :9 0.002187 0.000108 -0.002079 ×20.25 (-10000:) + 0 0.006252 0.003716 -0.002536 × 1.68 (-10000:) + (:99) 0.006367 0.003707 -0.002660 × 1.71 :9 + (-10:) 0.003846 0.000110 -0.003736 ×34.96 :9 0.003854 0.000099 -0.003755 ×38.92 :99 + (-10000:) 0.007644 0.003778 -0.003866 × 2.02 Differential Revision: https://phab.mercurial-scm.org/D7894
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 11 Feb 2020 11:18:52 +0100
parents 40f78072fda9
children 5c2a4f37eace
line wrap: on
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#testcases flat tree
  $ . "$TESTDIR/narrow-library.sh"

#if tree
  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > treemanifest = 1
  > EOF
#endif

  $ hg init master
  $ cd master
  $ cat >> .hg/hgrc <<EOF
  > [narrow]
  > serveellipses=True
  > EOF

  $ mkdir inside
  $ echo 'inside' > inside/f
  $ hg add inside/f
  $ hg commit -m 'add inside'

  $ mkdir widest
  $ echo 'widest' > widest/f
  $ hg add widest/f
  $ hg commit -m 'add widest'

  $ mkdir outside
  $ echo 'outside' > outside/f
  $ hg add outside/f
  $ hg commit -m 'add outside'

  $ cd ..

narrow clone the inside file

  $ hg clone --narrow ssh://user@dummy/master narrow --include inside
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 1 changes to 1 files
  new changesets *:* (glob)
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd narrow
  $ hg tracked
  I path:inside
  $ ls
  inside
  $ cat inside/f
  inside
  $ cd ..

add more upstream files which we will include in a wider narrow spec

  $ cd master

  $ mkdir wider
  $ echo 'wider' > wider/f
  $ hg add wider/f
  $ echo 'widest v2' > widest/f
  $ hg commit -m 'add wider, update widest'

  $ echo 'widest v3' > widest/f
  $ hg commit -m 'update widest v3'

  $ echo 'inside v2' > inside/f
  $ hg commit -m 'update inside'

  $ mkdir outside2
  $ echo 'outside2' > outside2/f
  $ hg add outside2/f
  $ hg commit -m 'add outside2'

  $ echo 'widest v4' > widest/f
  $ hg commit -m 'update widest v4'

  $ hg log -T "{if(ellipsis, '...')}{rev}: {desc}\n"
  7: update widest v4
  6: add outside2
  5: update inside
  4: update widest v3
  3: add wider, update widest
  2: add outside
  1: add widest
  0: add inside

  $ cd ..

Testing the --import-rules flag of `hg tracked` command

  $ cd narrow
  $ hg tracked --import-rules
  hg tracked: option --import-rules requires argument
  hg tracked [OPTIONS]... [REMOTE]
  
  show or change the current narrowspec
  
  options ([+] can be repeated):
  
      --addinclude VALUE [+]       new paths to include
      --removeinclude VALUE [+]    old paths to no longer include
      --auto-remove-includes       automatically choose unused includes to
                                   remove
      --addexclude VALUE [+]       new paths to exclude
      --import-rules VALUE         import narrowspecs from a file
      --removeexclude VALUE [+]    old paths to no longer exclude
      --clear                      whether to replace the existing narrowspec
      --force-delete-local-changes forces deletion of local changes when
                                   narrowing
      --update-working-copy        update working copy when the store has
                                   changed
   -e --ssh CMD                    specify ssh command to use
      --remotecmd CMD              specify hg command to run on the remote side
      --insecure                   do not verify server certificate (ignoring
                                   web.cacerts config)
  
  (use 'hg tracked -h' to show more help)
  [255]
  $ hg tracked --import-rules doesnotexist
  abort: cannot read narrowspecs from '$TESTTMP/narrow/doesnotexist': $ENOENT$
  [255]

  $ cat > specs <<EOF
  > %include foo
  > [include]
  > path:widest/
  > [exclude]
  > path:inside/
  > EOF

  $ hg tracked --import-rules specs
  abort: including other spec files using '%include' is not supported in narrowspec
  [255]

  $ cat > specs <<EOF
  > [include]
  > outisde
  > [exclude]
  > inside
  > EOF

  $ hg tracked --import-rules specs
  comparing with ssh://user@dummy/master
  searching for changes
  looking for local changes to affected paths
  deleting data/inside/f.i
  deleting meta/inside/00manifest.i (tree !)
  saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob)
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 0 changes to 0 files
  $ hg tracked
  I path:outisde
  X path:inside

Testing the --import-rules flag with --addinclude and --addexclude

  $ cat > specs <<EOF
  > [include]
  > widest
  > EOF

  $ hg tracked --import-rules specs --addinclude 'wider/'
  comparing with ssh://user@dummy/master
  searching for changes
  saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob)
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 1 changes to 1 files
  $ hg tracked
  I path:outisde
  I path:wider
  I path:widest
  X path:inside

  $ cat > specs <<EOF
  > [exclude]
  > outside2
  > EOF

  $ hg tracked --import-rules specs --addexclude 'widest'
  comparing with ssh://user@dummy/master
  searching for changes
  looking for local changes to affected paths
  deleting data/widest/f.i
  deleting meta/widest/00manifest.i (tree !)
  $ hg tracked
  I path:outisde
  I path:wider
  X path:inside
  X path:outside2
  X path:widest

  $ hg tracked --import-rules specs --clear
  abort: the --clear option is not yet supported
  [255]

Testing with passing a out of wdir file

  $ cat > ../nspecs <<EOF
  > [include]
  > widest
  > EOF

  $ hg tracked --import-rules ../nspecs
  comparing with ssh://user@dummy/master
  searching for changes
  saved backup bundle to $TESTTMP/narrow/.hg/strip-backup/*-widen.hg (glob)
  adding changesets
  adding manifests
  adding file changes
  added 3 changesets with 0 changes to 0 files

  $ cd ..

Testing tracked command on a non-narrow repo

  $ hg init non-narrow
  $ cd non-narrow
  $ hg tracked --addinclude foobar
  abort: the tracked command is only supported on repositories cloned with --narrow
  [255]