github
/
aria2
mirror of https://github.com/aria2/aria2
1
0
Fork 0
Code Issues Releases Wiki Activity

2009-03-20 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net> 

Refactored RarestPieceSelector to reduce CPU load, especially
	for addPieceStats.	
	* src/RarestPieceSelector.cc
	* src/RarestPieceSelector.h
pull/1/head
Tatsuhiro Tsujikawa 2009-03-20 13:37:53 +00:00
parent 3644682511
commit 662a90ce9b
4 changed files with 34 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
ChangeLog
View File

@ -1,3 +1,10 @@
2009-03-20 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>
Refactored RarestPieceSelector to reduce CPU load, especially for
addPieceStats.
* src/RarestPieceSelector.cc
* src/RarestPieceSelector.h
2009-03-20 Tatsuhiro Tsujikawa <t-tujikawa@users.sourceforge.net>
Refactored getMissingIndexRandomly, getFirstMissingIndex,

23
src/RarestPieceSelector.cc
View File

@ -109,7 +109,7 @@ RarestPieceSelector::RarestPieceSelector(size_t pieceNum, bool randomShuffle):
}
{
size_t order = 0;
for(std::deque<SharedHandle<PieceStat> >::iterator i = _sortedPieceStats.begin();
for(std::vector<SharedHandle<PieceStat> >::iterator i = _sortedPieceStats.begin();
i != _sortedPieceStats.end(); ++i) {
(*i)->setOrder(order++);
}
@ -133,7 +133,7 @@ bool RarestPieceSelector::select
(size_t& index,
const std::deque<size_t>& candidateIndexes) const
{
std::deque<SharedHandle<PieceStat> >::const_iterator i =
std::vector<SharedHandle<PieceStat> >::const_iterator i =
std::find_if(_sortedPieceStats.begin(), _sortedPieceStats.end(),
FindRarestPiece(candidateIndexes));
if(i == _sortedPieceStats.end()) {
@ -201,22 +201,19 @@ void RarestPieceSelector::updatePieceStats(const unsigned char* newBitfield,
void RarestPieceSelector::addPieceStats(size_t index)
{
SharedHandle<PieceStat> pieceStat(_pieceStats[index]);
{
std::deque<SharedHandle<PieceStat> >::iterator cur =
std::lower_bound(_sortedPieceStats.begin(), _sortedPieceStats.end(),
pieceStat);
_sortedPieceStats.erase(cur);
}
pieceStat->addCount();
std::deque<SharedHandle<PieceStat> >::iterator to =
std::vector<SharedHandle<PieceStat> >::iterator cur =
std::lower_bound(_sortedPieceStats.begin(), _sortedPieceStats.end(),
pieceStat);
_sortedPieceStats.insert(to, pieceStat);
pieceStat->addCount();
std::vector<SharedHandle<PieceStat> >::iterator to =
std::upper_bound(cur+1, _sortedPieceStats.end(), pieceStat);
std::rotate(cur, cur+1, to);
}
const std::deque<SharedHandle<PieceStat> >&
const std::vector<SharedHandle<PieceStat> >&
RarestPieceSelector::getSortedPieceStats() const
{
return _sortedPieceStats;

8
src/RarestPieceSelector.h
View File

@ -37,6 +37,8 @@
#include "PieceSelector.h"
#include <vector>
namespace aria2 {
class PieceStat {
@ -60,9 +62,9 @@ public:
class RarestPieceSelector:public PieceSelector {
private:
std::deque<SharedHandle<PieceStat> > _pieceStats;
std::vector<SharedHandle<PieceStat> > _pieceStats;
std::deque<SharedHandle<PieceStat> > _sortedPieceStats;
std::vector<SharedHandle<PieceStat> > _sortedPieceStats;
public:
RarestPieceSelector(size_t pieceNum, bool randomShuffle);
@ -81,7 +83,7 @@ public:
size_t newBitfieldLength,
const unsigned char* oldBitfield);
const std::deque<SharedHandle<PieceStat> >& getSortedPieceStats() const;
const std::vector<SharedHandle<PieceStat> >& getSortedPieceStats() const;
};
} // namespace aria2

21
test/RarestPieceSelectorTest.cc
View File

@ -1,10 +1,13 @@
#include "RarestPieceSelector.h"
#include "Exception.h"
#include "Util.h"
#include <cstring>
#include <iostream>
#include <cppunit/extensions/HelperMacros.h>
#include "Exception.h"
#include "Util.h"
namespace aria2 {
class RarestPieceSelectorTest:public CppUnit::TestFixture {
@ -37,7 +40,7 @@ void RarestPieceSelectorTest::testAddPieceStats_index()
size_t indexes[] = { 0, 2, 3, 4, 5, 6, 7, 8, 9, 1 };
size_t counts[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
CPPUNIT_ASSERT_EQUAL((size_t)10, stats.size());
for(size_t i = 0; i < 10; ++i) {
@ -52,7 +55,7 @@ void RarestPieceSelectorTest::testAddPieceStats_index()
size_t indexes[] = { 0, 2, 3, 4, 5, 6, 7, 8, 9, 1 };
size_t counts[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
for(size_t i = 0; i < 10; ++i) {
CPPUNIT_ASSERT_EQUAL(indexes[i], stats[i]->getIndex());
@ -69,7 +72,7 @@ void RarestPieceSelectorTest::testAddPieceStats_index()
size_t indexes[] = { 2, 4, 5, 6, 7, 8, 0, 9, 1, 3 };
size_t counts[] = { 0, 0, 0, 0, 0, 0, 1, 1, 2, 2 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
for(size_t i = 0; i < 10; ++i) {
CPPUNIT_ASSERT_EQUAL(indexes[i], stats[i]->getIndex());
@ -88,7 +91,7 @@ void RarestPieceSelectorTest::testAddPieceStats_bitfield()
size_t indexes[] = { 1, 3, 5, 7, 9, 0, 2, 4, 6, 8 };
size_t counts[] = { 0, 0, 0, 0, 0, 1, 1, 1, 1, 1 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
CPPUNIT_ASSERT_EQUAL((size_t)10, stats.size());
for(size_t i = 0; i < 10; ++i) {
@ -103,7 +106,7 @@ void RarestPieceSelectorTest::testAddPieceStats_bitfield()
size_t indexes[] = { 1, 3, 5, 7, 9, 0, 2, 4, 6, 8 };
size_t counts[] = { 0, 0, 0, 0, 0, 2, 2, 2, 2, 2 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
CPPUNIT_ASSERT_EQUAL((size_t)10, stats.size());
for(size_t i = 0; i < 10; ++i) {
@ -135,7 +138,7 @@ void RarestPieceSelectorTest::testUpdatePieceStats()
size_t indexes[] = { 0, 1, 2, 3, 8, 9, 4, 5, 6, 7 };
size_t counts[] = { 0, 0, 0, 1, 1, 1, 2, 2, 2, 2 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
CPPUNIT_ASSERT_EQUAL((size_t)10, stats.size());
for(size_t i = 0; i < 10; ++i) {
@ -165,7 +168,7 @@ void RarestPieceSelectorTest::testSubtractPieceStats()
size_t indexes[] = { 2, 3, 4, 5, 6, 7, 8, 9, 0, 1 };
size_t counts[] = { 0, 0, 0, 0, 0, 0, 0, 0, 1, 1 };
const std::deque<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
const std::vector<SharedHandle<PieceStat> >& stats(selector.getSortedPieceStats());
CPPUNIT_ASSERT_EQUAL((size_t)10, stats.size());
for(size_t i = 0; i < 10; ++i) {