// Get data packer for this object, if we have cached data
// AND the CRC matches. JC
LLDataPacker *LLViewerRegion::getDP(U32 local_id, U32 crc)
{
llassert(mCacheLoaded);
LLVOCacheEntry* entry = get_if_there(mCacheMap, local_id, (LLVOCacheEntry*)NULL);
if (entry)
{
// we've seen this object before
if (entry->getCRC() == crc)
{
// Record a hit
entry->recordHit();
return entry->getDP(crc);
}
else
{
// llinfos << "CRC miss for " << local_id << llendl;
mCacheMissCRC.put(local_id);
}
}
else
{
// llinfos << "Cache miss for " << local_id << llendl;
mCacheMissFull.put(local_id);
}
return NULL;
}
// Get data packer for this object, if we have cached data
// AND the CRC matches. JC
LLDataPacker *LLViewerRegion::getDP(U32 local_id, U32 crc, U8 &cache_miss_type)
{
//llassert(mCacheLoaded); This assert failes often, changing to early-out -- davep, 2010/10/18
LLVOCacheEntry* entry = get_if_there(mImpl->mCacheMap, local_id, (LLVOCacheEntry*)NULL);
if (entry)
{
// we've seen this object before
if (entry->getCRC() == crc)
{
// Record a hit
entry->recordHit();
cache_miss_type = CACHE_MISS_TYPE_NONE;
return entry->getDP(crc);
}
else
{
// llinfos << "CRC miss for " << local_id << llendl;
cache_miss_type = CACHE_MISS_TYPE_CRC;
mCacheMissCRC.put(local_id);
}
}
else
{
// llinfos << "Cache miss for " << local_id << llendl;
cache_miss_type = CACHE_MISS_TYPE_FULL;
mCacheMissFull.put(local_id);
}
return NULL;
}
void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map)
{
llassert_always(mInitialized);
handle_entry_map_t::iterator iter = mHandleEntryMap.find(handle) ;
if(iter == mHandleEntryMap.end()) //no cache
{
return ;
}
std::string filename;
getObjectCacheFilename(handle, filename);
LLAPRFile* apr_file = new LLAPRFile(filename, APR_READ|APR_BINARY, mLocalAPRFilePoolp);
LLUUID cache_id ;
if(!checkRead(apr_file, cache_id.mData, UUID_BYTES))
{
return ;
}
if(cache_id != id)
{
llinfos << "Cache ID doesn't match for this region, discarding"<< llendl;
delete apr_file ;
return ;
}
S32 num_entries;
if(!checkRead(apr_file, &num_entries, sizeof(S32)))
{
return ;
}
for (S32 i = 0; i < num_entries; i++)
{
LLVOCacheEntry* entry = new LLVOCacheEntry(apr_file);
if (!entry->getLocalID())
{
llwarns << "Aborting cache file load for " << filename << ", cache file corruption!" << llendl;
delete entry ;
break;
}
cache_entry_map[entry->getLocalID()] = entry;
}
num_entries = cache_entry_map.size() ;
delete apr_file ;
return ;
}
LLViewerRegion::eCacheUpdateResult LLViewerRegion::cacheFullUpdate(LLViewerObject* objectp, LLDataPackerBinaryBuffer &dp)
{
U32 local_id = objectp->getLocalID();
U32 crc = objectp->getCRC();
LLVOCacheEntry* entry = get_if_there(mImpl->mCacheMap, local_id, (LLVOCacheEntry*)NULL);
if (entry)
{
// we've seen this object before
if (entry->getCRC() == crc)
{
// Record a hit
entry->recordDupe();
return CACHE_UPDATE_DUPE;
}
// Update the cache entry
mImpl->mCacheMap.erase(local_id);
delete entry;
entry = new LLVOCacheEntry(local_id, crc, dp);
mImpl->mCacheMap[local_id] = entry;
return CACHE_UPDATE_CHANGED;
}
// we haven't seen this object before
// Create new entry and add to map
eCacheUpdateResult result = CACHE_UPDATE_ADDED;
if (mImpl->mCacheMap.size() > MAX_OBJECT_CACHE_ENTRIES)
{
delete mImpl->mCacheMap.begin()->second ;
mImpl->mCacheMap.erase(mImpl->mCacheMap.begin());
result = CACHE_UPDATE_REPLACED;
}
entry = new LLVOCacheEntry(local_id, crc, dp);
mImpl->mCacheMap[local_id] = entry;
return result;
}
void LLViewerRegion::cacheFullUpdate(LLViewerObject* objectp, LLDataPackerBinaryBuffer &dp)
{
U32 local_id = objectp->getLocalID();
U32 crc = objectp->getCRC();
LLVOCacheEntry* entry = get_if_there(mCacheMap, local_id, (LLVOCacheEntry*)NULL);
if (entry)
{
// we've seen this object before
if (entry->getCRC() == crc)
{
// Record a hit
entry->recordDupe();
}
else
{
// Update the cache entry
mCacheMap.erase(local_id);
delete entry;
entry = new LLVOCacheEntry(local_id, crc, dp);
mCacheMap[local_id] = entry;
}
}
else
{
// we haven't seen this object before
// Create new entry and add to map
if (mCacheMap.size() > MAX_OBJECT_CACHE_ENTRIES)
{
mCacheMap.erase(mCacheMap.begin());
}
entry = new LLVOCacheEntry(local_id, crc, dp);
mCacheMap[local_id] = entry;
}
return ;
}
void LLViewerRegion::dumpCache()
{
const S32 BINS = 4;
S32 hit_bin[BINS];
S32 change_bin[BINS];
S32 i;
for (i = 0; i < BINS; ++i)
{
hit_bin[i] = 0;
change_bin[i] = 0;
}
LLVOCacheEntry *entry;
for(LLVOCacheEntry::vocache_entry_map_t::iterator iter = mCacheMap.begin(); iter != mCacheMap.end(); ++iter)
{
entry = iter->second ;
S32 hits = entry->getHitCount();
S32 changes = entry->getCRCChangeCount();
hits = llclamp(hits, 0, BINS-1);
changes = llclamp(changes, 0, BINS-1);
hit_bin[hits]++;
change_bin[changes]++;
}
llinfos << "Count " << mCacheMap.size() << llendl;
for (i = 0; i < BINS; i++)
{
llinfos << "Hits " << i << " " << hit_bin[i] << llendl;
}
for (i = 0; i < BINS; i++)
{
llinfos << "Changes " << i << " " << change_bin[i] << llendl;
}
}
void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::vocache_entry_map_t& cache_entry_map)
{
if(!mEnabled)
{
llwarns << "Not reading cache for handle " << handle << "): Cache is currently disabled." << llendl;
return ;
}
llassert_always(mInitialized);
handle_entry_map_t::iterator iter = mHandleEntryMap.find(handle) ;
if(iter == mHandleEntryMap.end()) //no cache
{
llwarns << "No handle map entry for " << handle << llendl;
return ;
}
bool success = true ;
{
std::string filename;
getObjectCacheFilename(handle, filename);
LLAPRFile apr_file(filename, APR_READ|APR_BINARY, mLocalAPRFilePoolp);
LLUUID cache_id ;
success = check_read(&apr_file, cache_id.mData, UUID_BYTES) ;
if(success)
{
if(cache_id != id)
{
llinfos << "Cache ID doesn't match for this region, discarding"<< llendl;
success = false ;
}
if(success)
{
S32 num_entries;
success = check_read(&apr_file, &num_entries, sizeof(S32)) ;
for (S32 i = 0; success && i < num_entries; i++)
{
LLVOCacheEntry* entry = new LLVOCacheEntry(&apr_file);
if (!entry->getLocalID())
{
llwarns << "Aborting cache file load for " << filename << ", cache file corruption!" << llendl;
delete entry ;
success = false ;
}
cache_entry_map[entry->getLocalID()] = entry;
}
}
}
}
if(!success)
{
if(cache_entry_map.empty())
{
removeEntry(iter->second) ;
}
}
return ;
}