mirror of
https://github.com/git/git.git
synced 2024-11-16 06:03:44 +01:00
3b1eb12493
Signed-off-by: Dan McGee <dpmcgee@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
212 lines
6.5 KiB
Perl
Executable file
212 lines
6.5 KiB
Perl
Executable file
#!/usr/bin/perl
|
|
#
|
|
# This tool will print vaguely pretty information about a pack. It
|
|
# expects the output of "git verify-pack -v" as input on stdin.
|
|
#
|
|
# $ git verify-pack -v | packinfo.pl
|
|
#
|
|
# This prints some full-pack statistics; currently "all sizes", "all
|
|
# path sizes", "tree sizes", "tree path sizes", and "depths".
|
|
#
|
|
# * "all sizes" stats are across every object size in the file;
|
|
# full sizes for base objects, and delta size for deltas.
|
|
# * "all path sizes" stats are across all object's "path sizes".
|
|
# A path size is the sum of the size of the delta chain, including the
|
|
# base object. In other words, it's how many bytes need be read to
|
|
# reassemble the file from deltas.
|
|
# * "tree sizes" are object sizes grouped into delta trees.
|
|
# * "tree path sizes" are path sizes grouped into delta trees.
|
|
# * "depths" should be obvious.
|
|
#
|
|
# When run as:
|
|
#
|
|
# $ git verify-pack -v | packinfo.pl -tree
|
|
#
|
|
# the trees of objects are output along with the stats. This looks
|
|
# like:
|
|
#
|
|
# 0 commit 031321c6... 803 803
|
|
#
|
|
# 0 blob 03156f21... 1767 1767
|
|
# 1 blob f52a9d7f... 10 1777
|
|
# 2 blob a8cc5739... 51 1828
|
|
# 3 blob 660e90b1... 15 1843
|
|
# 4 blob 0cb8e3bb... 33 1876
|
|
# 2 blob e48607f0... 311 2088
|
|
# size: count 6 total 2187 min 10 max 1767 mean 364.50 median 51 std_dev 635.85
|
|
# path size: count 6 total 11179 min 1767 max 2088 mean 1863.17 median 1843 std_dev 107.26
|
|
#
|
|
# The first number after the sha1 is the object size, the second
|
|
# number is the path size. The statistics are across all objects in
|
|
# the previous delta tree. Obviously they are omitted for trees of
|
|
# one object.
|
|
#
|
|
# When run as:
|
|
#
|
|
# $ git verify-pack -v | packinfo.pl -tree -filenames
|
|
#
|
|
# it adds filenames to the tree. Getting this information is slow:
|
|
#
|
|
# 0 blob 03156f21... 1767 1767 Documentation/git-lost-found.txt @ tags/v1.2.0~142
|
|
# 1 blob f52a9d7f... 10 1777 Documentation/git-lost-found.txt @ tags/v1.5.0-rc1~74
|
|
# 2 blob a8cc5739... 51 1828 Documentation/git-lost+found.txt @ tags/v0.99.9h^0
|
|
# 3 blob 660e90b1... 15 1843 Documentation/git-lost+found.txt @ master~3222^2~2
|
|
# 4 blob 0cb8e3bb... 33 1876 Documentation/git-lost+found.txt @ master~3222^2~3
|
|
# 2 blob e48607f0... 311 2088 Documentation/git-lost-found.txt @ tags/v1.5.2-rc3~4
|
|
# size: count 6 total 2187 min 10 max 1767 mean 364.50 median 51 std_dev 635.85
|
|
# path size: count 6 total 11179 min 1767 max 2088 mean 1863.17 median 1843 std_dev 107.26
|
|
#
|
|
# When run as:
|
|
#
|
|
# $ git verify-pack -v | packinfo.pl -dump
|
|
#
|
|
# it prints out "sha1 size pathsize depth" for each sha1 in lexical
|
|
# order.
|
|
#
|
|
# 000079a2eaef17b7eae70e1f0f635557ea67b644 30 472 7
|
|
# 00013cafe6980411aa6fdd940784917b5ff50f0a 44 1542 4
|
|
# 000182eacf99cde27d5916aa415921924b82972c 499 499 0
|
|
# ...
|
|
#
|
|
# This is handy for comparing two packs. Adding "-filenames" will add
|
|
# filenames, as per "-tree -filenames" above.
|
|
|
|
use strict;
|
|
use Getopt::Long;
|
|
|
|
my $filenames = 0;
|
|
my $tree = 0;
|
|
my $dump = 0;
|
|
GetOptions("tree" => \$tree,
|
|
"filenames" => \$filenames,
|
|
"dump" => \$dump);
|
|
|
|
my %parents;
|
|
my %children;
|
|
my %sizes;
|
|
my @roots;
|
|
my %paths;
|
|
my %types;
|
|
my @commits;
|
|
my %names;
|
|
my %depths;
|
|
my @depths;
|
|
|
|
while (<STDIN>) {
|
|
my ($sha1, $type, $size, $space, $offset, $depth, $parent) = split(/\s+/, $_);
|
|
next unless ($sha1 =~ /^[0-9a-f]{40}$/);
|
|
$depths{$sha1} = $depth || 0;
|
|
push(@depths, $depth || 0);
|
|
push(@commits, $sha1) if ($type eq 'commit');
|
|
push(@roots, $sha1) unless $parent;
|
|
$parents{$sha1} = $parent;
|
|
$types{$sha1} = $type;
|
|
push(@{$children{$parent}}, $sha1);
|
|
$sizes{$sha1} = $size;
|
|
}
|
|
|
|
if ($filenames && ($tree || $dump)) {
|
|
open(NAMES, "git name-rev --all|");
|
|
while (<NAMES>) {
|
|
if (/^(\S+)\s+(.*)$/) {
|
|
my ($sha1, $name) = ($1, $2);
|
|
$names{$sha1} = $name;
|
|
}
|
|
}
|
|
close NAMES;
|
|
|
|
for my $commit (@commits) {
|
|
my $name = $names{$commit};
|
|
open(TREE, "git ls-tree -t -r $commit|");
|
|
print STDERR "Plumbing tree $name\n";
|
|
while (<TREE>) {
|
|
if (/^(\S+)\s+(\S+)\s+(\S+)\s+(.*)$/) {
|
|
my ($mode, $type, $sha1, $path) = ($1, $2, $3, $4);
|
|
$paths{$sha1} = "$path @ $name";
|
|
}
|
|
}
|
|
close TREE;
|
|
}
|
|
}
|
|
|
|
sub stats {
|
|
my @data = sort {$a <=> $b} @_;
|
|
my $min = $data[0];
|
|
my $max = $data[$#data];
|
|
my $total = 0;
|
|
my $count = scalar @data;
|
|
for my $datum (@data) {
|
|
$total += $datum;
|
|
}
|
|
my $mean = $total / $count;
|
|
my $median = $data[int(@data / 2)];
|
|
my $diff_sum = 0;
|
|
for my $datum (@data) {
|
|
$diff_sum += ($datum - $mean)**2;
|
|
}
|
|
my $std_dev = sqrt($diff_sum / $count);
|
|
return ($count, $total, $min, $max, $mean, $median, $std_dev);
|
|
}
|
|
|
|
sub print_stats {
|
|
my $name = shift;
|
|
my ($count, $total, $min, $max, $mean, $median, $std_dev) = stats(@_);
|
|
printf("%s: count %s total %s min %s max %s mean %.2f median %s std_dev %.2f\n",
|
|
$name, $count, $total, $min, $max, $mean, $median, $std_dev);
|
|
}
|
|
|
|
my @sizes;
|
|
my @path_sizes;
|
|
my @all_sizes;
|
|
my @all_path_sizes;
|
|
my %path_sizes;
|
|
|
|
sub dig {
|
|
my ($sha1, $depth, $path_size) = @_;
|
|
$path_size += $sizes{$sha1};
|
|
push(@sizes, $sizes{$sha1});
|
|
push(@all_sizes, $sizes{$sha1});
|
|
push(@path_sizes, $path_size);
|
|
push(@all_path_sizes, $path_size);
|
|
$path_sizes{$sha1} = $path_size;
|
|
if ($tree) {
|
|
printf("%3d%s %6s %s %8d %8d %s\n",
|
|
$depth, (" " x $depth), $types{$sha1},
|
|
$sha1, $sizes{$sha1}, $path_size, $paths{$sha1});
|
|
}
|
|
for my $child (@{$children{$sha1}}) {
|
|
dig($child, $depth + 1, $path_size);
|
|
}
|
|
}
|
|
|
|
my @tree_sizes;
|
|
my @tree_path_sizes;
|
|
|
|
for my $root (@roots) {
|
|
undef @sizes;
|
|
undef @path_sizes;
|
|
dig($root, 0, 0);
|
|
my ($aa, $sz_total) = stats(@sizes);
|
|
my ($bb, $psz_total) = stats(@path_sizes);
|
|
push(@tree_sizes, $sz_total);
|
|
push(@tree_path_sizes, $psz_total);
|
|
if ($tree) {
|
|
if (@sizes > 1) {
|
|
print_stats(" size", @sizes);
|
|
print_stats("path size", @path_sizes);
|
|
}
|
|
print "\n";
|
|
}
|
|
}
|
|
|
|
if ($dump) {
|
|
for my $sha1 (sort keys %sizes) {
|
|
print "$sha1 $sizes{$sha1} $path_sizes{$sha1} $depths{$sha1} $paths{$sha1}\n";
|
|
}
|
|
} else {
|
|
print_stats(" all sizes", @all_sizes);
|
|
print_stats(" all path sizes", @all_path_sizes);
|
|
print_stats(" tree sizes", @tree_sizes);
|
|
print_stats("tree path sizes", @tree_path_sizes);
|
|
print_stats(" depths", @depths);
|
|
}
|