forked from premiere/premiere-libtorrent
added test to render file fragmentation
This commit is contained in:
Arvid Norberg
parent
c9b594fde1
commit
7a5da3815b
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@ -23,4 +23,5 @@ exe dump_torrent : dump_torrent.cpp ;
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exe make_torrent : make_torrent.cpp ;
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exe make_torrent : make_torrent.cpp ;
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exe enum_if : enum_if.cpp ;
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exe enum_if : enum_if.cpp ;
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exe connection_tester : connection_tester.cpp ;
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exe connection_tester : connection_tester.cpp ;
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exe fragmentation_test : fragmentation_test.cpp ;
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@ -0,0 +1,127 @@
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/*
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Copyright (c) 2010, Arvid Norberg
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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* Neither the name of the author nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "libtorrent/storage.hpp"
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#include "libtorrent/file_pool.hpp"
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#include <boost/utility.hpp>
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#include <stdlib.h>
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using namespace libtorrent;
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int main(int argc, char const* argv[])
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{
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if (argc != 3)
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{
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fprintf(stderr, "Usage: fragmentation_test torrent-file file-storage-path\n");
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return 1;
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}
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error_code ec;
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boost::intrusive_ptr<torrent_info> ti(new torrent_info(argv[1], ec));
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if (ec)
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{
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fprintf(stderr, "Error while loading torrent file: %s\n", ec.message().c_str());
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return 1;
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}
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file_pool fp;
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boost::shared_ptr<storage_interface> st(default_storage_constructor(ti->files(), 0, argv[2], fp));
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// the first field is the piece index, the second
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// one is the physical location of the piece on disk
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std::vector<std::pair<int, size_type> > pieces;
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// make sure all the files are there
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std::vector<std::pair<size_type, std::time_t> > files = get_filesizes(ti->files(), argv[2]);
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for (int i = 0; i < ti->num_files(); ++i)
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{
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if (ti->file_at(i).size == files[i].first) continue;
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fprintf(stderr, "Files for this torrent are missing or incomplete: %s was %"PRId64" bytes, expected %"PRId64" bytes\n"
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, ti->file_at(i).path.c_str(), files[i].first, ti->file_at(i).size);
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return 1;
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}
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for (int i = 0; i < ti->num_pieces(); ++i)
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{
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pieces.push_back(std::make_pair(i, st->physical_offset(i, 0)));
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if (pieces.back().second == size_type(i) * ti->piece_length())
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{
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// this suggests that the OS doesn't support physical offset
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// or that the file doesn't exist, or some other file error
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fprintf(stderr, "Your operating system or filesystem "
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"does not appear to support querying physical disk offset\n");
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return 1;
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}
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}
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FILE* f = fopen("fragmentation.log", "w+");
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if (f == 0)
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{
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fprintf(stderr, "error while opening log file: %s\n", strerror(errno));
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return 1;
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}
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for (int i = 0; i < ti->num_pieces(); ++i)
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{
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fprintf(f, "%d %"PRId64"\n", pieces[i].first, pieces[i].second);
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}
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fclose(f);
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f = fopen("fragmentation.gnuplot", "w+");
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if (f == 0)
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{
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fprintf(stderr, "error while opening gnuplot file: %s\n", strerror(errno));
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return 1;
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}
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fprintf(f,
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"set term png size 1200,800\n"
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"set output \"fragmentation.png\"\n"
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"set xrange [*:*]\n"
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"set xlabel \"piece\"\n"
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"set ylabel \"file position\"\n"
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"set key box\n"
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"set title \"fragmentation for '%s'\"\n"
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"set tics nomirror\n"
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"plot \"fragmentation.log\" using 1:2 with dots lt rgb \"#e07070\" notitle axis x1y1, x=0\n"
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, ti->name().c_str());
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fclose(f);
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system("gnuplot fragmentation.gnuplot");
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}
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