comparison mercurial/debugcommands.py @ 35059:5cbbef8d2a57

debugdeltachain: output information about sparse read if enabled

35058:a68c3420be41

                    base of delta chain to end of this revision; a measurement
                    of how much extra data we need to read/seek across to read
                    the delta chain for this revision
    :``extraratio``: extradist divided by chainsize; another representation of
                    how much unrelated data is needed to load this delta chain
    """
    opts = pycompat.byteskwargs(opts)
    r = cmdutil.openrevlog(repo, 'debugdeltachain', file_, opts)
    index = r.index
    generaldelta = r.version & revlog.FLAG_GENERALDELTA

    def revinfo(rev):
        e = index[rev]
        compsize = e[1]
        uncompsize = e[2]

    fm = ui.formatter('debugdeltachain', opts)

    fm.plain('    rev  chain# chainlen     prev   delta       '
             'size    rawsize  chainsize     ratio   lindist extradist '
             'extraratio\n')

    chainbases = {}
    for rev in r:
        comp, uncomp, deltatype, chain, chainsize = revinfo(rev)
        chainbase = chain[0]
        chainid = chainbases.setdefault(chainbase, len(chainbases) + 1)
        basestart = r.start(chainbase)
        revstart = r.start(rev)
        lineardist = revstart + comp - basestart
        extradist = lineardist - chainsize
        try:
            prevrev = chain[-2]
        except IndexError:

        fm.startitem()
        fm.write('rev chainid chainlen prevrev deltatype compsize '
                 'uncompsize chainsize chainratio lindist extradist '
                 'extraratio',
                 '%7d %7d %8d %8d %7s %10d %10d %10d %9.5f %9d %9d %10.5f\n',
                 rev, chainid, len(chain), prevrev, deltatype, comp,
                 uncomp, chainsize, chainratio, lineardist, extradist,
                 extraratio,
                 rev=rev, chainid=chainid, chainlen=len(chain),
                 prevrev=prevrev, deltatype=deltatype, compsize=comp,
                 uncompsize=uncomp, chainsize=chainsize,
                 chainratio=chainratio, lindist=lineardist,
                 extradist=extradist, extraratio=extraratio)

    fm.end()

@command('debugdirstate|debugstate',
    [('', 'nodates', None, _('do not display the saved mtime')),

35059:5cbbef8d2a57

                    base of delta chain to end of this revision; a measurement
                    of how much extra data we need to read/seek across to read
                    the delta chain for this revision
    :``extraratio``: extradist divided by chainsize; another representation of
                    how much unrelated data is needed to load this delta chain

    If the repository is configured to use the sparse read, additional keywords
    are available:

    :``readsize``:     total size of data read from the disk for a revision
                       (sum of the sizes of all the blocks)
    :``largestblock``: size of the largest block of data read from the disk
    :``readdensity``:  density of useful bytes in the data read from the disk

    The sparse read can be enabled with experimental.sparse-read = True
    """
    opts = pycompat.byteskwargs(opts)
    r = cmdutil.openrevlog(repo, 'debugdeltachain', file_, opts)
    index = r.index
    generaldelta = r.version & revlog.FLAG_GENERALDELTA
    withsparseread = getattr(r, '_withsparseread', False)

    def revinfo(rev):
        e = index[rev]
        compsize = e[1]
        uncompsize = e[2]

    fm = ui.formatter('debugdeltachain', opts)

    fm.plain('    rev  chain# chainlen     prev   delta       '
             'size    rawsize  chainsize     ratio   lindist extradist '
             'extraratio')
    if withsparseread:
        fm.plain('   readsize largestblk rddensity')
    fm.plain('\n')

    chainbases = {}
    for rev in r:
        comp, uncomp, deltatype, chain, chainsize = revinfo(rev)
        chainbase = chain[0]
        chainid = chainbases.setdefault(chainbase, len(chainbases) + 1)
        start = r.start
        length = r.length
        basestart = start(chainbase)
        revstart = start(rev)
        lineardist = revstart + comp - basestart
        extradist = lineardist - chainsize
        try:
            prevrev = chain[-2]
        except IndexError:

        fm.startitem()
        fm.write('rev chainid chainlen prevrev deltatype compsize '
                 'uncompsize chainsize chainratio lindist extradist '
                 'extraratio',
                 '%7d %7d %8d %8d %7s %10d %10d %10d %9.5f %9d %9d %10.5f',
                 rev, chainid, len(chain), prevrev, deltatype, comp,
                 uncomp, chainsize, chainratio, lineardist, extradist,
                 extraratio,
                 rev=rev, chainid=chainid, chainlen=len(chain),
                 prevrev=prevrev, deltatype=deltatype, compsize=comp,
                 uncompsize=uncomp, chainsize=chainsize,
                 chainratio=chainratio, lindist=lineardist,
                 extradist=extradist, extraratio=extraratio)
        if withsparseread:
            readsize = 0
            largestblock = 0
            for revschunk in revlog._slicechunk(r, chain):
                blkend = start(revschunk[-1]) + length(revschunk[-1])
                blksize = blkend - start(revschunk[0])

                readsize += blksize
                if largestblock < blksize:
                    largestblock = blksize

            readdensity = float(chainsize) / float(readsize)

            fm.write('readsize largestblock readdensity',
                     ' %10d %10d %9.5f',
                     readsize, largestblock, readdensity,
                     readsize=readsize, largestblock=largestblock,
                     readdensity=readdensity)

        fm.plain('\n')

    fm.end()

@command('debugdirstate|debugstate',
    [('', 'nodates', None, _('do not display the saved mtime')),