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comparison mercurial/debugcommands.py @ 30538:bd5c4320b5a8

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debugcommands: move 'debugdeltachain' in the new module
author Gregory Szorc <gregory.szorc@gmail.com>
date Wed, 17 Aug 2016 21:01:02 -0700
parents 22683f2f8100
children 342d0cb4f446
comparison
equal deleted inserted replaced
30537:22683f2f8100 30538:bd5c4320b5a8
746 pp = r.parents(node) 746 pp = r.parents(node)
747 ui.write("\t%d -> %d\n" % (r.rev(pp[0]), i)) 747 ui.write("\t%d -> %d\n" % (r.rev(pp[0]), i))
748 if pp[1] != nullid: 748 if pp[1] != nullid:
749 ui.write("\t%d -> %d\n" % (r.rev(pp[1]), i)) 749 ui.write("\t%d -> %d\n" % (r.rev(pp[1]), i))
750 ui.write("}\n") 750 ui.write("}\n")
751
752 @command('debugdeltachain',
753 commands.debugrevlogopts + commands.formatteropts,
754 _('-c|-m|FILE'),
755 optionalrepo=True)
756 def debugdeltachain(ui, repo, file_=None, **opts):
757 """dump information about delta chains in a revlog
758
759 Output can be templatized. Available template keywords are:
760
761 :``rev``: revision number
762 :``chainid``: delta chain identifier (numbered by unique base)
763 :``chainlen``: delta chain length to this revision
764 :``prevrev``: previous revision in delta chain
765 :``deltatype``: role of delta / how it was computed
766 :``compsize``: compressed size of revision
767 :``uncompsize``: uncompressed size of revision
768 :``chainsize``: total size of compressed revisions in chain
769 :``chainratio``: total chain size divided by uncompressed revision size
770 (new delta chains typically start at ratio 2.00)
771 :``lindist``: linear distance from base revision in delta chain to end
772 of this revision
773 :``extradist``: total size of revisions not part of this delta chain from
774 base of delta chain to end of this revision; a measurement
775 of how much extra data we need to read/seek across to read
776 the delta chain for this revision
777 :``extraratio``: extradist divided by chainsize; another representation of
778 how much unrelated data is needed to load this delta chain
779 """
780 r = cmdutil.openrevlog(repo, 'debugdeltachain', file_, opts)
781 index = r.index
782 generaldelta = r.version & revlog.REVLOGGENERALDELTA
783
784 def revinfo(rev):
785 e = index[rev]
786 compsize = e[1]
787 uncompsize = e[2]
788 chainsize = 0
789
790 if generaldelta:
791 if e[3] == e[5]:
792 deltatype = 'p1'
793 elif e[3] == e[6]:
794 deltatype = 'p2'
795 elif e[3] == rev - 1:
796 deltatype = 'prev'
797 elif e[3] == rev:
798 deltatype = 'base'
799 else:
800 deltatype = 'other'
801 else:
802 if e[3] == rev:
803 deltatype = 'base'
804 else:
805 deltatype = 'prev'
806
807 chain = r._deltachain(rev)[0]
808 for iterrev in chain:
809 e = index[iterrev]
810 chainsize += e[1]
811
812 return compsize, uncompsize, deltatype, chain, chainsize
813
814 fm = ui.formatter('debugdeltachain', opts)
815
816 fm.plain(' rev chain# chainlen prev delta '
817 'size rawsize chainsize ratio lindist extradist '
818 'extraratio\n')
819
820 chainbases = {}
821 for rev in r:
822 comp, uncomp, deltatype, chain, chainsize = revinfo(rev)
823 chainbase = chain[0]
824 chainid = chainbases.setdefault(chainbase, len(chainbases) + 1)
825 basestart = r.start(chainbase)
826 revstart = r.start(rev)
827 lineardist = revstart + comp - basestart
828 extradist = lineardist - chainsize
829 try:
830 prevrev = chain[-2]
831 except IndexError:
832 prevrev = -1
833
834 chainratio = float(chainsize) / float(uncomp)
835 extraratio = float(extradist) / float(chainsize)
836
837 fm.startitem()
838 fm.write('rev chainid chainlen prevrev deltatype compsize '
839 'uncompsize chainsize chainratio lindist extradist '
840 'extraratio',
841 '%7d %7d %8d %8d %7s %10d %10d %10d %9.5f %9d %9d %10.5f\n',
842 rev, chainid, len(chain), prevrev, deltatype, comp,
843 uncomp, chainsize, chainratio, lineardist, extradist,
844 extraratio,
845 rev=rev, chainid=chainid, chainlen=len(chain),
846 prevrev=prevrev, deltatype=deltatype, compsize=comp,
847 uncompsize=uncomp, chainsize=chainsize,
848 chainratio=chainratio, lindist=lineardist,
849 extradist=extradist, extraratio=extraratio)
850
851 fm.end()