Mercurial > hg-stable
changeset 51078:752e380c5702
debug-delta-chain: add options to control what we compute
Currently this mostly controls what we display, but actual computation saving
will come soon.
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Tue, 19 Sep 2023 01:53:03 +0200 |
| parents | 810446d2d5ef |
| children | 5b5cb6b833b0 |
| files | mercurial/debugcommands.py mercurial/revlogutils/debug.py tests/test-completion.t |
| diffstat | 3 files changed, 125 insertions(+), 21 deletions(-) [+] |
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--- a/mercurial/debugcommands.py Tue Sep 19 01:24:10 2023 +0200 +++ b/mercurial/debugcommands.py Tue Sep 19 01:53:03 2023 +0200 @@ -753,6 +753,24 @@ [], _('restrict processing to these revlog revisions'), ), + ( + b'', + b'size-info', + True, + _('compute information related to deltas size'), + ), + ( + b'', + b'dist-info', + True, + _('compute information related to base distance'), + ), + ( + b'', + b'sparse-info', + True, + _('compute information related to sparse read'), + ), ] + cmdutil.debugrevlogopts + cmdutil.formatteropts, @@ -767,8 +785,10 @@ :``rev``: revision number :``p1``: parent 1 revision number (for reference) :``p2``: parent 2 revision number (for reference) + :``chainid``: delta chain identifier (numbered by unique base) :``chainlen``: delta chain length to this revision + :``prevrev``: previous revision in delta chain :``deltatype``: role of delta / how it was computed - base: a full snapshot @@ -781,11 +801,13 @@ (when p2 has empty delta - prev: a delta against the previous revision - other: a delta against an arbitrary revision + :``compsize``: compressed size of revision :``uncompsize``: uncompressed size of revision :``chainsize``: total size of compressed revisions in chain :``chainratio``: total chain size divided by uncompressed revision size (new delta chains typically start at ratio 2.00) + :``lindist``: linear distance from base revision in delta chain to end of this revision :``extradist``: total size of revisions not part of this delta chain from @@ -804,18 +826,64 @@ :``readdensity``: density of useful bytes in the data read from the disk :``srchunks``: in how many data hunks the whole revision would be read + It is possible to select the information to be computed, this can provide a + noticeable speedup to the command in some cases. + + Always computed: + + - ``rev`` + - ``p1`` + - ``p2`` + - ``chainid`` + - ``chainlen`` + - ``prevrev`` + - ``deltatype`` + + Computed with --no-size-info + + - ``compsize`` + - ``uncompsize`` + - ``chainsize`` + - ``chainratio`` + + Computed with --no-dist-info + + - ``lindist`` + - ``extradist`` + - ``extraratio`` + + Skipped with --no-sparse-info + + - ``readsize`` + - ``largestblock`` + - ``readdensity`` + - ``srchunks`` + + -- + The sparse read can be enabled with experimental.sparse-read = True """ revs = None revs_opt = opts.pop('rev', []) if revs_opt: revs = [int(r) for r in revs_opt] + + size_info = opts.pop('size_info', True) + dist_info = opts.pop('dist_info', True) + sparse_info = opts.pop('sparse_info', True) + revlog = cmdutil.openrevlog( repo, b'debugdeltachain', file_, pycompat.byteskwargs(opts) ) fm = ui.formatter(b'debugdeltachain', pycompat.byteskwargs(opts)) - lines = revlog_debug.debug_delta_chain(revlog, revs=revs) + lines = revlog_debug.debug_delta_chain( + revlog, + revs=revs, + size_info=size_info, + dist_info=dist_info, + sparse_info=sparse_info, + ) # first entry is the header header = next(lines) fm.plain(header)
--- a/mercurial/revlogutils/debug.py Tue Sep 19 01:24:10 2023 +0200 +++ b/mercurial/revlogutils/debug.py Tue Sep 19 01:53:03 2023 +0200 @@ -798,10 +798,24 @@ chain_size += e[constants.ENTRY_DATA_COMPRESSED_LENGTH] self._chain_size_cache[rev] = chain_size - return p1, p2, compsize, uncompsize, deltatype, chain, chain_size + return { + 'p1': p1, + 'p2': p2, + 'compressed_size': compsize, + 'uncompressed_size': uncompsize, + 'deltatype': deltatype, + 'chain': chain, + 'chain_size': chain_size, + } -def debug_delta_chain(revlog, revs=None): +def debug_delta_chain( + revlog, + revs=None, + size_info=True, + dist_info=True, + sparse_info=True, +): auditor = DeltaChainAuditor(revlog) r = revlog start = r.start @@ -809,12 +823,20 @@ withsparseread = revlog.data_config.with_sparse_read header = ( - b' rev p1 p2 chain# chainlen prev delta ' - b'size rawsize chainsize ratio lindist extradist ' - b'extraratio' + b' rev' + b' p1' + b' p2' + b' chain#' + b' chainlen' + b' prev' + b' delta' ) - if withsparseread: - header += b' readsize largestblk rddensity srchunks' + if size_info: + header += b' size' b' rawsize' b' chainsize' b' ratio' + if dist_info: + header += b' lindist' b' extradist' b' extraratio' + if withsparseread and sparse_info: + header += b' readsize' b' largestblk' b' rddensity' b' srchunks' header += b'\n' yield header @@ -826,12 +848,16 @@ chainbases = {} for rev in all_revs: - p1, p2, comp, uncomp, deltatype, chain, chainsize = auditor.revinfo(rev) + info = auditor.revinfo(rev) + comp = info['compressed_size'] + uncomp = info['uncompressed_size'] + chain = info['chain'] chainbase = chain[0] chainid = chainbases.setdefault(chainbase, len(chainbases) + 1) basestart = start(chainbase) revstart = start(rev) lineardist = revstart + comp - basestart + chainsize = info['chain_size'] extradist = lineardist - chainsize try: prevrev = chain[-2] @@ -851,21 +877,31 @@ # label, display-format, data-key, value entry = [ (b'rev', b'%7d', 'rev', rev), - (b'p1', b'%7d', 'p1', p1), - (b'p2', b'%7d', 'p2', p2), + (b'p1', b'%7d', 'p1', info['p1']), + (b'p2', b'%7d', 'p2', info['p2']), (b'chainid', b'%7d', 'chainid', chainid), (b'chainlen', b'%8d', 'chainlen', len(chain)), (b'prevrev', b'%8d', 'prevrev', prevrev), - (b'deltatype', b'%7s', 'deltatype', deltatype), - (b'compsize', b'%10d', 'compsize', comp), - (b'uncompsize', b'%10d', 'uncompsize', uncomp), - (b'chainsize', b'%10d', 'chainsize', chainsize), - (b'chainratio', b'%9.5f', 'chainratio', chainratio), - (b'lindist', b'%9d', 'lindist', lineardist), - (b'extradist', b'%9d', 'extradist', extradist), - (b'extraratio', b'%10.5f', 'extraratio', extraratio), + (b'deltatype', b'%7s', 'deltatype', info['deltatype']), ] - if withsparseread: + if size_info: + entry.extend( + [ + (b'compsize', b'%10d', 'compsize', comp), + (b'uncompsize', b'%10d', 'uncompsize', uncomp), + (b'chainsize', b'%10d', 'chainsize', chainsize), + (b'chainratio', b'%9.5f', 'chainratio', chainratio), + ] + ) + if dist_info: + entry.extend( + [ + (b'lindist', b'%9d', 'lindist', lineardist), + (b'extradist', b'%9d', 'extradist', extradist), + (b'extraratio', b'%10.5f', 'extraratio', extraratio), + ] + ) + if withsparseread and sparse_info: readsize = 0 largestblock = 0 srchunks = 0
--- a/tests/test-completion.t Tue Sep 19 01:24:10 2023 +0200 +++ b/tests/test-completion.t Tue Sep 19 01:53:03 2023 +0200 @@ -296,7 +296,7 @@ debugdag: tags, branches, dots, spaces debugdata: changelog, manifest, dir debugdate: extended - debugdeltachain: rev, changelog, manifest, dir, template + debugdeltachain: rev, size-info, dist-info, sparse-info, changelog, manifest, dir, template debugdirstateignorepatternshash: debugdirstate: nodates, dates, datesort, docket, all debugdiscovery: old, nonheads, rev, seed, local-as-revs, remote-as-revs, ssh, remotecmd, insecure, template