int main(int argc, char** argv) {
int i;
int *arr;
int access_mem_count;
int seed;
if(argc<3) {
fprintf(stderr,"usage: %s [access_mem_count] [seed]\n",argv[0]);
exit(-1);
}
access_mem_count=atoi(argv[1]);
seed=atoi(argv[2]);
if(access_mem_count<100||access_mem_count>1000000) {
fprintf(stderr,"First parameter is wrong range\n");
exit(-1);
}
arr=(int*)malloc(sizeof(int)*access_mem_count);
arr = genAddr(access_mem_count, seed);
printf("FIFO: %d\n",fifo(arr,access_mem_count));
printf("LRU: %d\n",lru(arr,access_mem_count));
/*
for(i = 0; i < access_mem_count; i++)
printf("%dst addr value : %d\n", i, arr[i]);
*/
return 0;
}
void test_range_constructor() {
std::string s("Kalahari");
lru_list<char> lru(s.begin(), s.end());
ASSERT_EQUAL(6, lru.size());
std::string lru_string(lru.begin(), lru.end());
ASSERT_EQUAL("irahlK", lru_string);
}
int main()
{
int i,ch;
printf("\nEnter total number of pages:");
scanf("%d",&n);
printf("\nEnter sequence:");
for(i=0;i<n;i++) //accepting sequence
scanf("%d",&pg[i]);
do
{
printf("\n\tMENU\n");
printf("\n1)FIFO");
printf("\n2)OPTIMAL");
printf("\n3)LRU");
printf("\n4)Exit");
printf("\nEnter your choice:");
scanf("%d",&ch);
switch(ch)
{
case 1: fifo();
break;
case 2: optimal();
break;
case 3: lru();
break;
}
}while(ch!=4);
getchar();
}
void object::test<4>()
{
set_test_name("performance");
const size_t n = 1000;
typedef cache::cache_t<int, int, cache::lru_t> LRUCache;
LRUCache lru(n);
std::cout << std::endl << "lru:" << std::endl;
// Test a variety of cache load levels
benchmark(lru,n,n/2 ,1024*n);
benchmark(lru,n,(7*n)/8,1024*n);
benchmark(lru,n,n ,1024*n);
benchmark(lru,n, 1.2 * n, 1024*n);
benchmark(lru,n, 2 * n ,1024*n);
benchmark(lru,n, 10 * n ,1024*n);
benchmark(lru,n, 100 * n ,1024*n);
benchmark(lru,n, 1000 * n ,1024*n);
std::cout << std::endl << "lfu:" << std::endl;
typedef cache::cache_t<int, int, cache::lfu_t> LFUCache;
LFUCache lru2(n);
// Test a variety of cache load levels
benchmark(lru2,n,n/2 ,1024*n);
benchmark(lru2,n,(7*n)/8,1024*n);
benchmark(lru2,n,n ,1024*n);
benchmark(lru2,n, 1.2 * n, 1024*n);
benchmark(lru2,n, 2 * n ,1024*n);
benchmark(lru2,n, 10 * n ,1024*n);
benchmark(lru2,n, 100 * n ,1024*n);
benchmark(lru2,n, 1000 * n ,1024*n);
std::cout << std::endl << "fifo:" << std::endl;
typedef cache::cache_t<int, int, cache::fifo_t> FIFOCache;
FIFOCache lru3(n);
// Test a variety of cache load levels
benchmark(lru3,n,n/2 ,1024*n);
benchmark(lru3,n,(7*n)/8,1024*n);
benchmark(lru3,n,n ,1024*n);
benchmark(lru3,n, 1.2 * n, 1024*n);
benchmark(lru3,n, 2 * n ,1024*n);
benchmark(lru3,n, 10 * n ,1024*n);
benchmark(lru3,n, 100 * n ,1024*n);
benchmark(lru3,n, 1000 * n ,1024*n);
}
int main(void)
{
int frameSize, i = 0;
char file[32], *requests = NULL, ch;
FILE *fp;
initscr();
werase(stdscr);
getmaxyx(stdscr, maxy, maxx);
mvprintw(maxy/2 - 1, (maxx - 40)/2, "Enter the name of file to be read: ");
scanw("%s", file);
if((fp = fopen(file, "r")) == NULL)
{
mvprintw(maxy/2 + 1, (maxx - 20) / 2, "Error opening file!!!");
getch();
endwin();
return -1;
}
ch = getc(fp);
while(ch != EOF)
{
i++;
requests = (char *) realloc(requests, sizeof(char) * i);
requests[i - 1] = ch;
ch = getc(fp);
};
requests = (char *) realloc(requests, sizeof(char) * (i+1));
requests[i] = '\0';
fclose(fp);
mvprintw(maxy/2 + 1, (maxx - 30) / 2, "Enter the number of frames: ");
scanw("%d", &frameSize);
while(1)
{
switch(menu())
{
case 1: fcfs(requests, frameSize);
break;
case 2: lru(requests, frameSize);
break;
case 3: optimal(requests, frameSize);
break;
case 4: endwin();
return 0;
}
}
return 0;
}
//main
int main(void){
int i = 0;
for(i=1;i<=7;i++){
fifo(i);
}
for(i=1;i<=7;i++){
lru(i);
}
for(i=1;i<=7;i++){
opt(i);
}
}
//called when client want to read any page into memory, it decides on strategy which will be
//used at the time of page replacement.
RC pinPage (BM_BufferPool *const bm, BM_PageHandle *const page, const PageNumber pageNum){
if(bm!=NULL){
if(bm->strategy==RS_FIFO){
fifo(bm,page,pageNum);//calls FIFO.
}else if(bm->strategy==RS_LRU){
lru(bm,page,pageNum);//calls LRU
}
return RC_OK;
}else{
RC_message="Buffer is not initialized ";
return RC_BUFFER_NOT_INITIALIZED;
}
}
unsigned lru_simulate(unsigned pages[], unsigned pages_len, unsigned table_len)
{
printf("\n\nrunning LRU simulation\n");
for(int i=0; i<pages_len; i++)
{
printf("%d ", pages[i]);
}
printf("\n");
// clock(pages, pages_len, table_len);
lru(pages, pages_len, table_len);
return 0;
}
int main()
{
frame f[10];
int prs[20],pl,fs,i,j,pf=0;
int ifpresent(frame f[],int ,int );
int lru(frame f[],int );
void dec(frame f[],int ,int );
void disp(frame f[],int );
printf("Enter the length of page reference string\n");
scanf("%d",&pl);
printf("Enter the elements of page reference string\n");
for(i=0;i<pl;i++)
scanf("%d",&prs[i]);
printf("Enter the frame size\n");
scanf("%d",&fs);
for(i=0;i<fs;i++)
{
f[i].pid=0;
f[i].pr=3;
}
printf("Allocating using LRU policy\n");
for(i=0;i<pl;i++)
{
if(!(ifpresent(f,fs,prs[i])))
{
j=lru(f,fs);
f[j].pid=prs[i];
dec(f,fs,f[j].pid);
pf++;
}
else
dec(f,fs,prs[i]);
disp(f,fs);
}
printf("Number of page faults : %d\n",pf);
return 0;
}
void pageit(Pentry q[MAXPROCESSES]) {
/* This file contains the stub for an LRU pager */
/* You may need to add/remove/modify any part of this file */
//printf("%ld",processes[0]->pid);
/* Static vars */
static int initialized = 0;
//static int tick = 1; // artificial time
//printf("here\n");
/* Local vars */
int proctmp;
int minPageTwo;
int secondMinPageOne;
int secondMinPageTwo;
int pagetmp;
int secondMaxPage;
int secondsecondMaxPage;
int pc;
int page;
static int procount=0;
int min;
int pageOne;
int predOne;
int predTwo;
int predThree;
int swapRow=0;
int swapCol=0;
int tmppage;
int proc;
int pageTwo;
int minPage;
int i;
int minPageOne;
/* initialize static vars on first run */
if(!initialized){
for(proctmp=0; proctmp < MAXPROCESSES; proctmp++){
for(pagetmp=0; pagetmp < MAXPROCPAGES; pagetmp++){
timestamps[proctmp][pagetmp] = 0;
pageLastRemovedAt[proctmp][pagetmp]=0;
numberofpagesout=0;
for(i=0; i<2;i++){
betRevlentPage[proctmp][pagetmp][i]=0;
}
for(i=0;i<MAXPROCPAGES;i++){
revelentPageFreq[proctmp][pagetmp][i]=0;
}
}
lastPageCalled[proctmp]=0;
}
tick=1;
prevtick=0;
initialized = 1;
}
//pager();
for(proc=0; proc <MAXPROCESSES; proc++){
//printf("1\n");
if(q[proc].active){
//printf("2\n");
pc = q[proc].pc;
page=pc/PAGESIZE;
/*if(procount>=4){
pager(q);
}*/
timestamps[proc][page] = tick;
tmppage=lastPageCalled[page];
betRevlentPage[proc][tmppage][1]=betRevlentPage[proc][tmppage][0];
betRevlentPage[proc][tmppage][0]=page;
predOne=betRevlentPage[proc][page][0];
predTwo=betRevlentPage[proc][predOne][0];
predThree=betRevlentPage[proc][predTwo][0];
revelentPageFreq[proc][tmppage][page]++;
lastPageCalled[proc]=page;
pageOne=arrayMax(proc,page,&secondMaxPage);
pageTwo=arrayMax(proc,pageOne,&secondsecondMaxPage);
minPageOne=arrayMin(q,proc,page,&secondMinPageOne);
minPageTwo=arrayMin(q,proc,pageOne,&secondMinPageTwo);
minPage=lru(q,proc,page);
pagein(proc,page);
pagein(proc,pageTwo);
pagein(proc,pageOne);
/*if(secondMaxPage!=-100 && secondMaxPage!=secondMinPageOne){
pagein(proc,secondMaxPage);
if(secondMinPageOne!=-100){
pageout(proc, secondMinPageOne);
}
}
if(secondMaxPage!=-100 && secondMaxPage!=secondMinPageTwo){
pagein(proc,secondsecondMaxPage);*
if(secondMinPageTwo!=-100){
pageout(proc,secondMinPageTwo);
}
}*/
//pagein(proc,predThree);
//pagein(proc,predTwo);
//pagein(proc,predOne);
if(!q[proc].pages[page]){
effChecker(proc,page);
if(!pagein(proc,page)){
pageout(proc,minPage);
pageout(proc,minPageOne);
pageout(proc,minPageTwo);
if(secondMinPageTwo!=-100){
pageout(proc,secondMinPageTwo);
}
if(secondMinPageOne!=-100){
pageout(proc, secondMinPageOne);
}
}else if(!pagein(proc,pageTwo)){
pageout(proc,minPage);
pageout(proc,minPageOne);
if(secondMinPageTwo!=-100){
pageout(proc,secondMinPageTwo);
}
if(secondMinPageOne!=-100){
pageout(proc, secondMinPageOne);
}
}else if(!pagein(proc,pageOne)){
//pageout(proc,minPage);
pageout(proc,minPage);
pageout(proc,minPageOne);
pageout(proc,minPageTwo);
//pageout(proc,minPageOne);
if(secondMinPageTwo!=-100){
pageout(proc,secondMinPageTwo);
}
if(secondMinPageOne!=-100){
pageout(proc, secondMinPageOne);
}
}
}
}else{//remove all things related to the process if not active
for(i=0;i<MAXPROCPAGES;i++){
pageout(proc,i);
procount++;
}
}
}
/* TODO: Implement LRU Paging */
//pager(q);
/* advance time for next pageit iteration */
pager(q);
tick++;
}
/** Save the specified mode to file */
void history_t::save_internal()
{
/* This must be called while locked */
ASSERT_IS_LOCKED(lock);
/* Nothing to do if there's no new items */
if (new_items.empty() && deleted_items.empty())
return;
/* Compact our new items so we don't have duplicates */
this->compact_new_items();
bool ok = true;
wcstring tmp_name = history_filename(name, L".tmp");
if( ! tmp_name.empty() )
{
/* Make an LRU cache to save only the last N elements */
history_lru_cache_t lru(HISTORY_SAVE_MAX);
/* Insert old items in, from old to new. Merge them with our new items, inserting items with earlier timestamps first. */
std::vector<history_item_t>::const_iterator new_item_iter = new_items.begin();
/* Map in existing items (which may have changed out from underneath us, so don't trust our old mmap'd data) */
const char *local_mmap_start = NULL;
size_t local_mmap_size = 0;
if (map_file(name, &local_mmap_start, &local_mmap_size)) {
size_t cursor = 0;
for (;;) {
size_t offset = offset_of_next_item(local_mmap_start, local_mmap_size, &cursor, 0);
/* If we get back -1, we're done */
if (offset == (size_t)(-1))
break;
/* Try decoding an old item */
const history_item_t old_item = history_t::decode_item(local_mmap_start + offset, local_mmap_size - offset);
if (old_item.empty() || is_deleted(old_item))
{
// debug(0, L"Item is deleted : %s\n", old_item.str().c_str());
continue;
}
/* The old item may actually be more recent than our new item, if it came from another session. Insert all new items at the given index with an earlier timestamp. */
for (; new_item_iter != new_items.end(); ++new_item_iter) {
if (new_item_iter->timestamp() < old_item.timestamp()) {
/* This "new item" is in fact older. */
lru.add_item(*new_item_iter);
} else {
/* The new item is not older. */
break;
}
}
/* Now add this old item */
lru.add_item(old_item);
}
munmap((void *)local_mmap_start, local_mmap_size);
}
/* Insert any remaining new items */
for (; new_item_iter != new_items.end(); ++new_item_iter)
{
lru.add_item(*new_item_iter);
}
signal_block();
FILE *out;
if( (out=wfopen( tmp_name, "w" ) ) )
{
/* Write them out */
for (history_lru_cache_t::iterator iter = lru.begin(); iter != lru.end(); ++iter) {
const history_lru_node_t *node = *iter;
if (! node->write_yaml_to_file(out)) {
ok = false;
break;
}
}
if( fclose( out ) || !ok )
{
/*
This message does not have high enough priority to
be shown by default.
*/
debug( 2, L"Error when writing history file" );
}
else
{
wcstring new_name = history_filename(name, wcstring());
wrename(tmp_name, new_name);
}
}
signal_unblock();
/* Make sure we clear all nodes, since this doesn't happen automatically */
lru.evict_all_nodes();
/* We've saved everything, so we have no more unsaved items */
unsaved_item_count = 0;
}
if( ok )
{
/* Our history has been written to the file, so clear our state so we can re-reference the file. */
this->clear_file_state();
}
}
int main(int argc, char * argv[])
{
int policy; /* replacement policy */
int current; /* current page accessed */
FILE * fp; /* The file containing the page accesses */
FILE * rp; /* output file */
char filename[30]={""};
const char * extension[] ={".fifo", ".lru", "new"};
float num_accesses = 0.0; /* total number of page accesses */
float page_faults = 0.0;
unsigned victim = 0; /* page to be replaced */
/* Getting and checking the input from the command line */
if(argc != 4)
{
printf("usage: pager policy size filename\n");
exit(1);
}
policy = atoi(argv[1]);
mem_size = atoi(argv[2]);
if( policy < 0 || policy > 2)
{
printf("policy must be 0, 1, or 2\n");
exit(1);
}
if(mem_size <= 0 )
{
printf("Size must be a positive integer.\n");
exit(1);
}
/* Allocate and initialize the memory */
mem = (int *)calloc(mem_size, sizeof(int));
if(!mem)
{
printf("Cannot allocate mem\n");
exit(1);
}
/* open the memory access file */
fp = fopen(argv[3], "r");
if(!fp)
{
printf("Cannot open file %s\n", argv[3]);
exit(1);
}
/* Create the output file */
strcat(filename, argv[3]);
strcat(filename,extension[policy]);
rp = fopen(filename, "w");
if(!rp)
{
printf("Cannot create file %s\n", filename);
exit(1);
}
/* The main loop of the program */
fscanf(fp,"%d", ¤t);
while(!feof(fp))
{
num_accesses++;
if(mem_check(current) == PAGEMISS)
page_faults++;
switch(policy)
{
case 0: if( IsFull())
{
victim = fifo();
mem[victim] = current;
}
else
insert(current);
break;
case 1: if( IsFull())
{
victim = lru();
mem[victim] = current;
}
else
insert(current);
break;
case 2: if( IsFull())
{
victim = own();
mem[victim] = current;
}
else
insert(current);
break;
default: printf("Unknown policy ... Exiting\n");
exit(1);
}/* end switch-case */
print_mem(rp);
fscanf(fp,"%d", ¤t);
}/* end while */
fprintf(rp,"percentage of page faults = %f", page_faults/num_accesses);
/* wrap-up */
fclose(fp);
fclose(rp);
free(mem);
return 1;
}
void TriSoup::ReindexTriangles(int lruSize, std::vector<int>& outFaceOrder)
{
////////////////////////////////////////
// Init vert and face arrays.
const int numVerts = NumVertices();
const int numTris = NumFaces();
std::vector<CacheSort::Vertex> verts(numVerts);
std::vector<CacheSort::Face> faces(numTris);
for(int i = 0, c = NumFaces(); i < c; ++i)
{
faces[i].m_indices[0] = m_faces[i].m_vertices[0];
faces[i].m_indices[1] = m_faces[i].m_vertices[1];
faces[i].m_indices[2] = m_faces[i].m_vertices[2];
}
CacheSort::InitValence(verts, faces);
outFaceOrder = std::vector<int>(numTris, -1);
////////////////////////////////////////
// Finished init. now start the main loop
CacheSort::VertexLRU lru(lruSize+3); // 3 extra to hold up to 3 verts which get pushed off.
const int *cache = lru.GetVertexCache();
int cacheSize = lru.GetCacheSize();
int idxDrawList = 0;
int curFace = CacheSort::FindBestFaceGlobal(verts, faces);
while(curFace >= 0)
{
ASSERT( idxDrawList < numTris );
// Add this face to the draw list.
outFaceOrder[idxDrawList++] = curFace;
lru.AddFace(&faces[curFace], verts);
// decrement current valency so we don't keep computing scores for already drawn faces
CacheSort::Face::RemoveConnections(curFace, verts, faces);
// Recompute scores of all verts in the LRU
for(int i = 0; i < cacheSize && cache[i] >= 0; ++i)
{
int idxVert = cache[i];
verts[idxVert].ComputeScore(cacheSize);
}
int bestFace = -1;
float bestFaceScore = 0.f;
// Recompute scores of all faces whose scores would change due to changes in the LRU
for(int i = 0; i < cacheSize && cache[i] >= 0; ++i)
{
int idxVert = cache[i];
for(int j = 0; j < verts[idxVert].m_valency; ++j)
{
int idxFace = verts[idxVert].m_clientFaces[j];
float faceScore =
verts[ faces[idxFace].m_indices[0] ].m_score +
verts[ faces[idxFace].m_indices[1] ].m_score +
verts[ faces[idxFace].m_indices[2] ].m_score ;
if (faceScore > bestFaceScore) {
bestFace = idxFace;
bestFaceScore = faceScore;
}
}
}
// Truncate the extra 3 verts. This just means if the next face includes one of the removed verts, it will be added instead of
// swapped, which will push more verts off. Also it means those 3 verts will NOT be included in scoring next iteration.
lru.Truncate(lruSize, verts);
// If for some reason the valency information doesn't link adjacent faces, then just pick the best global face again.
if( bestFace < 0 )
curFace = CacheSort::FindBestFaceGlobal(verts, faces);
else
curFace = bestFace;
}
}
static int copyPageToRam(sim_database_t* sim_db,int pageNum,int isFromSwap)// add lru
{
int ret;
missCounter++;
//find a new frame
freeFrameNum=freeFrameInBitMap();
//if we dont have any free frame, use the lru algorithem
if(freeFrameNum == -1)
{
freeFrameNum=lru(sim_db);
if(freeFrameNum==-1)
{
perror("lru returned -1..problem in lru");
return -1;
}
}
if (isFromSwap==1)
{
//go with pointer (fd) to the specific page
lseek(sim_db->swapfile_fd,pageNum*PAGE_SIZE,SEEK_SET);
//read page from swap and save page in ram place
ret= read(sim_db->swapfile_fd,&ramMen[freeFrameNum*PAGE_SIZE],PAGE_SIZE);
if( ret == -1)
{
perror("problem in read() from swap method");
return -1;
}
sim_db->page_table[pageNum].isInSwap=0;
}
// copy from disk
else
{
//go with pointer (fd) to the specific page in disk
ret=lseek(sim_db->executable_fd,pageNum*PAGE_SIZE,SEEK_SET);
if(ret==-1)
{
perror("problem in lseek from disk method");
return -1;
}
//read page from disk and save page in ram
ret= read(sim_db->executable_fd,&ramMen[freeFrameNum*32],32) ;
if(ret==-1)
{
perror("problem in read() from disk method");
return -1;
}
}
bitMap[freeFrameNum][0]=1;
bitMap[freeFrameNum][2]=pageNum;
bitMapAgeUpdate();
sim_db->page_table[pageNum].valid=1;
sim_db->page_table[pageNum].frame=freeFrameNum;
return 0;
}
/**
Vertex cache optimization according to the Forsyth paper:
http://home.comcast.net/~tom_forsyth/papers/fast_vert_cache_opt.html
The function is thread-safe (read: you can optimize several meshes in different threads)
\param mesh Source mesh for the operation. */
scene::IMesh* createForsythOptimizedMesh(const scene::IMesh *mesh)
{
if (!mesh)
return 0;
scene::SMesh *newmesh = new scene::SMesh();
newmesh->BoundingBox = mesh->getBoundingBox();
const u32 mbcount = mesh->getMeshBufferCount();
for (u32 b = 0; b < mbcount; ++b)
{
const scene::IMeshBuffer *mb = mesh->getMeshBuffer(b);
if (mb->getIndexType() != video::EIT_16BIT)
{
//os::Printer::log("Cannot optimize a mesh with 32bit indices", ELL_ERROR);
newmesh->drop();
return 0;
}
const u32 icount = mb->getIndexCount();
const u32 tcount = icount / 3;
const u32 vcount = mb->getVertexCount();
const u16 *ind = mb->getIndices();
vcache *vc = new vcache[vcount];
tcache *tc = new tcache[tcount];
f_lru lru(vc, tc);
// init
for (u16 i = 0; i < vcount; i++)
{
vc[i].score = 0;
vc[i].cachepos = -1;
vc[i].NumActiveTris = 0;
}
// First pass: count how many times a vert is used
for (u32 i = 0; i < icount; i += 3)
{
vc[ind[i]].NumActiveTris++;
vc[ind[i + 1]].NumActiveTris++;
vc[ind[i + 2]].NumActiveTris++;
const u32 tri_ind = i/3;
tc[tri_ind].ind[0] = ind[i];
tc[tri_ind].ind[1] = ind[i + 1];
tc[tri_ind].ind[2] = ind[i + 2];
}
// Second pass: list of each triangle
for (u32 i = 0; i < tcount; i++)
{
vc[tc[i].ind[0]].tris.push_back(i);
vc[tc[i].ind[1]].tris.push_back(i);
vc[tc[i].ind[2]].tris.push_back(i);
tc[i].drawn = false;
}
// Give initial scores
for (u16 i = 0; i < vcount; i++)
{
vc[i].score = FindVertexScore(&vc[i]);
}
for (u32 i = 0; i < tcount; i++)
{
tc[i].score =
vc[tc[i].ind[0]].score +
vc[tc[i].ind[1]].score +
vc[tc[i].ind[2]].score;
}
switch(mb->getVertexType())
{
case video::EVT_STANDARD:
{
video::S3DVertex *v = (video::S3DVertex *) mb->getVertices();
scene::SMeshBuffer *buf = new scene::SMeshBuffer();
buf->Material = mb->getMaterial();
buf->Vertices.reallocate(vcount);
buf->Indices.reallocate(icount);
core::map<const video::S3DVertex, const u16> sind; // search index for fast operation
typedef core::map<const video::S3DVertex, const u16>::Node snode;
// Main algorithm
u32 highest = 0;
u32 drawcalls = 0;
for (;;)
{
if (tc[highest].drawn)
{
bool found = false;
float hiscore = 0;
for (u32 t = 0; t < tcount; t++)
{
if (!tc[t].drawn)
{
if (tc[t].score > hiscore)
{
highest = t;
hiscore = tc[t].score;
found = true;
}
}
}
if (!found)
break;
}
// Output the best triangle
u16 newind = buf->Vertices.size();
snode *s = sind.find(v[tc[highest].ind[0]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[0]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[0]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[1]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[1]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[1]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[2]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[2]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[2]], newind);
}
else
{
buf->Indices.push_back(s->getValue());
}
vc[tc[highest].ind[0]].NumActiveTris--;
vc[tc[highest].ind[1]].NumActiveTris--;
vc[tc[highest].ind[2]].NumActiveTris--;
tc[highest].drawn = true;
for (u16 j = 0; j < 3; j++)
{
vcache *vert = &vc[tc[highest].ind[j]];
for (u16 t = 0; t < vert->tris.size(); t++)
{
if (highest == vert->tris[t])
{
vert->tris.erase(t);
break;
}
}
}
lru.add(tc[highest].ind[0]);
lru.add(tc[highest].ind[1]);
highest = lru.add(tc[highest].ind[2], true);
drawcalls++;
}
buf->setBoundingBox(mb->getBoundingBox());
newmesh->addMeshBuffer(buf);
buf->drop();
}
break;
case video::EVT_2TCOORDS:
{
video::S3DVertex2TCoords *v = (video::S3DVertex2TCoords *) mb->getVertices();
scene::SMeshBufferLightMap *buf = new scene::SMeshBufferLightMap();
buf->Material = mb->getMaterial();
buf->Vertices.reallocate(vcount);
buf->Indices.reallocate(icount);
core::map<const video::S3DVertex2TCoords, const u16> sind; // search index for fast operation
typedef core::map<const video::S3DVertex2TCoords, const u16>::Node snode;
// Main algorithm
u32 highest = 0;
u32 drawcalls = 0;
for (;;)
{
if (tc[highest].drawn)
{
bool found = false;
float hiscore = 0;
for (u32 t = 0; t < tcount; t++)
{
if (!tc[t].drawn)
{
if (tc[t].score > hiscore)
{
highest = t;
hiscore = tc[t].score;
found = true;
}
}
}
if (!found)
break;
}
// Output the best triangle
u16 newind = buf->Vertices.size();
snode *s = sind.find(v[tc[highest].ind[0]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[0]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[0]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[1]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[1]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[1]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[2]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[2]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[2]], newind);
}
else
{
buf->Indices.push_back(s->getValue());
}
vc[tc[highest].ind[0]].NumActiveTris--;
vc[tc[highest].ind[1]].NumActiveTris--;
vc[tc[highest].ind[2]].NumActiveTris--;
tc[highest].drawn = true;
for (u16 j = 0; j < 3; j++)
{
vcache *vert = &vc[tc[highest].ind[j]];
for (u16 t = 0; t < vert->tris.size(); t++)
{
if (highest == vert->tris[t])
{
vert->tris.erase(t);
break;
}
}
}
lru.add(tc[highest].ind[0]);
lru.add(tc[highest].ind[1]);
highest = lru.add(tc[highest].ind[2]);
drawcalls++;
}
buf->setBoundingBox(mb->getBoundingBox());
newmesh->addMeshBuffer(buf);
buf->drop();
}
break;
case video::EVT_TANGENTS:
{
video::S3DVertexTangents *v = (video::S3DVertexTangents *) mb->getVertices();
scene::SMeshBufferTangents *buf = new scene::SMeshBufferTangents();
buf->Material = mb->getMaterial();
buf->Vertices.reallocate(vcount);
buf->Indices.reallocate(icount);
core::map<const video::S3DVertexTangents, const u16> sind; // search index for fast operation
typedef core::map<const video::S3DVertexTangents, const u16>::Node snode;
// Main algorithm
u32 highest = 0;
u32 drawcalls = 0;
for (;;)
{
if (tc[highest].drawn)
{
bool found = false;
float hiscore = 0;
for (u32 t = 0; t < tcount; t++)
{
if (!tc[t].drawn)
{
if (tc[t].score > hiscore)
{
highest = t;
hiscore = tc[t].score;
found = true;
}
}
}
if (!found)
break;
}
// Output the best triangle
u16 newind = buf->Vertices.size();
snode *s = sind.find(v[tc[highest].ind[0]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[0]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[0]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[1]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[1]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[1]], newind);
newind++;
}
else
{
buf->Indices.push_back(s->getValue());
}
s = sind.find(v[tc[highest].ind[2]]);
if (!s)
{
buf->Vertices.push_back(v[tc[highest].ind[2]]);
buf->Indices.push_back(newind);
sind.insert(v[tc[highest].ind[2]], newind);
}
else
{
buf->Indices.push_back(s->getValue());
}
vc[tc[highest].ind[0]].NumActiveTris--;
vc[tc[highest].ind[1]].NumActiveTris--;
vc[tc[highest].ind[2]].NumActiveTris--;
tc[highest].drawn = true;
for (u16 j = 0; j < 3; j++)
{
vcache *vert = &vc[tc[highest].ind[j]];
for (u16 t = 0; t < vert->tris.size(); t++)
{
if (highest == vert->tris[t])
{
vert->tris.erase(t);
break;
}
}
}
lru.add(tc[highest].ind[0]);
lru.add(tc[highest].ind[1]);
highest = lru.add(tc[highest].ind[2]);
drawcalls++;
}
buf->setBoundingBox(mb->getBoundingBox());
newmesh->addMeshBuffer(buf);
buf->drop();
}
break;
}
delete [] vc;
delete [] tc;
} // for each meshbuffer
return newmesh;
}
RC pinPage (BM_BufferPool *const bm, BM_PageHandle *const page,
const PageNumber pageNum)
{
Data_Structure *ds = (Data_Structure *)bm->mgmtData;
if(ds[0].pagenum == -1)
{
//printf("\nINSIDE ds[0]->pagenum == -1\n");
SM_FileHandle fh;
openPageFile (bm->pageFile, &fh);
ds[0].data = (SM_PageHandle) malloc(PAGE_SIZE);
ensureCapacity(pageNum,&fh);
readBlock(pageNum, &fh, ds[0].data);
ds[0].pagenum = pageNum;
ds[0].fixedcnt++;
rear = 0;
hit = 0;
ds[0].hitnum = hit;
ds[0].numRef = 0;
page->pageNum = pageNum;
page->data = ds[0].data;
/*
printf("\nPinPage function buffer");
int i;
for(i=0;i<bufferSize; i++)
{
printf("\nPagenum: %d fixedcnt: %d dirty: %d",ds[i].pagenum,ds[i].fixedcnt,ds[i].dirtybit);
}*/
return RC_OK;
}
else
{
//printf("\nINSIDE front != NULL\n");
int i,check = 0;
for(i=0;i<bufferSize;i++)
{
if(ds[i].pagenum != -1)
{
if(ds[i].pagenum == pageNum) //if Page already in memory
{
ds[i].fixedcnt++;
check = 1;
hit++;
if(bm->strategy == RS_LRU)
ds[i].hitnum = hit;
else if(bm->strategy == RS_CLOCK) //if bm-> strategy is RS_CLOCK storing the USED bit in hitnum.
ds[i].hitnum = 1;
else if(bm->strategy == RS_LFU)
{
ds[i].numRef++;
//printf("Page %d referenced again \n", pageNum);
//rear = rear + 2;
//printf(" rear : %d \n", rear);
}
page->pageNum = pageNum;
page->data = ds[i].data;
clockptr++;
break;
}
}
else //Condition when the buffer has space to add a page
{
SM_FileHandle fh;
openPageFile (bm->pageFile, &fh);
ds[i].data = (SM_PageHandle) malloc(PAGE_SIZE);
readBlock(pageNum, &fh, ds[i].data);
ds[i].pagenum = pageNum;
ds[i].fixedcnt = 1;
ds[i].numRef = 0;
rear++;
hit++;
if(bm->strategy == RS_LRU)
ds[i].hitnum = hit;
else if(bm->strategy == RS_CLOCK) //if bm-> strategy is RS_CLOCK storing the USED bit in hitnum.
ds[i].hitnum = 1;
page->pageNum = pageNum;
page->data = ds[i].data;
check = 1;
break;
}
}//end of for
if(check == 0)//Condition when the buffer is full and we need to use a replacement strategy.
{
Data_Structure *temp = (Data_Structure *)malloc(sizeof(Data_Structure));
SM_FileHandle fh;
openPageFile (bm->pageFile, &fh);
temp->data = (SM_PageHandle) malloc(PAGE_SIZE);
readBlock(pageNum, &fh, temp->data);
temp->pagenum = pageNum;
temp->dirtybit = 0;
temp->fixedcnt = 1;
temp->numRef = 0;
rear++;
hit++;
//printf("HIT : %d \n", hit); //test by Rakesh
if(bm->strategy == RS_LRU )
temp->hitnum = hit;
else if(bm->strategy == RS_CLOCK) //if bm-> strategy is RS_CLOCK storing the USED bit in hitnum.
temp->hitnum = 1;
page->pageNum = pageNum;
page->data = temp->data;
switch(bm->strategy)
{
case RS_FIFO: //printf("\n Inside FIFO switch.");
fifo(bm,temp);
break;
case RS_LRU: //printf("\n Inside LRU switch.");
lru(bm,temp);
break;
case RS_CLOCK: //printf("\n Inside CLOCK switch");
clock(bm,temp);
break;
case RS_LFU: //printf("\n Inside LFU switch");
LFU(bm,temp);
break;
case RS_LRU_K: printf("\n Inside LRU_K switch");
break;
default:
printf("\nAlgorithm Not Implemented\n");
break;
}//end of switch
}//end of if(check = 0)
/*
printf("\nPinPage function buffer");
for(i=0;i<bufferSize;i++)
printf("\nPagenum: %d fixedcnt: %d dirty: %d",ds[i].pagenum,ds[i].fixedcnt,ds[i].dirtybit);
*/
return RC_OK;
}//end of else
}
//Devuelve el numero de marco para asignar o -1 si no había disponibles
int marco_libre(int pid) {
log_info(logger, "Se busca un marco libre para asignar");
pid_matchear = pid;
int paginaNuevoProceso = pagina_matchear;
if (marcos_libres() == 0) {
//Si no hay marcos disponibles
log_info(logger, "No hay marcos libres para asignar");
if (tiene_marcos_asignados(pid)) {
loggearInfo(
"El proceso ya tiene marcos asignados, se swappea alguno existente");
//Swappea uno que ya tiene
if (es_fifo()) {
return fifo();
}
if (es_lru()) {
return lru();
}
int marco = clock_m();
pagina_matchear = paginaNuevoProceso;
t_item * itemParaMeter = list_find(tabla_paginas,
coincide_pid_y_pagina);
list_replace(cola_llegada, posicionVictima, itemParaMeter);
loggearInfo("Se remplaza la victima con el nuevo elemento");
return marco;
} else {
loggearInfo("No hay marcos disponibles para asignar");
//No le puedo dar ninguno, se aborta
return -1;
}
} else {
//Hay marcos libres
loggearInfo("Hay marcos disponibles para asignar");
int cantidad_maxima_marcos_proceso = config_get_int_value(memoriaConfig,
"MAXIMO_MARCOS_POR_PROCESO");
if (marcos_asignados(pid) < cantidad_maxima_marcos_proceso) {
loggearInfo(
"El proceso tiene menos marcos que la cantidad maxima, se le da uno nuevo");
//Le doy un marco nuevo
int marco = marco_disponible();
if (es_clock_modificado()) {
//Si es clockModificado me fijo si no tiene presentes,
//significa que este que tengo acá en pid_matchear y pagina_matchear
//es el único elemento presente y pasa a ser puntero
t_item * elementoParaHacerPuntero;
bool algunoPresente = list_any_satisfy(tabla_paginas,
coincide_pid_y_esta_presente);
if (!algunoPresente) {
elementoParaHacerPuntero = list_find(tabla_paginas,
coincide_pid_y_pagina);
elementoParaHacerPuntero->puntero = true;
}
}
return marco;
} else {
loggearInfo(
"El proceso ya tiene la cantidad maxima de marcos, se swappea uno existente");
//Tiene el maximo y necesita swappear uno existente
if (es_fifo()) {
return fifo();
}
if (es_lru()) {
return lru();
}
int marco = clock_m();
pagina_matchear = paginaNuevoProceso;
t_item * itemParaMeter = list_find(tabla_paginas,
coincide_pid_y_pagina);
itemParaMeter->uso = true;
list_replace(cola_llegada, posicionVictima, itemParaMeter);
loggearInfo("Se remplaza la victima con el nuevo elemento");
return marco;
}
}
}
