From 3afdfa1dfa430f804a232dcda555bd425da66572 Mon Sep 17 00:00:00 2001 From: Don Kjer Date: Tue, 14 Dec 2010 23:56:35 -0800 Subject: First pass at fix for ER-401: Fix object cache header on the viewer --- indra/newview/llvocache.cpp | 162 +++++++++++++++++++++++++++----------------- 1 file changed, 101 insertions(+), 61 deletions(-) (limited to 'indra/newview/llvocache.cpp') diff --git a/indra/newview/llvocache.cpp b/indra/newview/llvocache.cpp index 145ee31260..6ea88abab8 100644 --- a/indra/newview/llvocache.cpp +++ b/indra/newview/llvocache.cpp @@ -40,6 +40,7 @@ BOOL check_write(LLAPRFile* apr_file, void* src, S32 n_bytes) return apr_file->write(src, n_bytes) == n_bytes ; } + //--------------------------------------------------------------------------- // LLVOCacheEntry //--------------------------------------------------------------------------- @@ -212,8 +213,8 @@ BOOL LLVOCacheEntry::writeToFile(LLAPRFile* apr_file) const if(success) { success = check_write(apr_file, (void*)mBuffer, size); + } } -} return success ; } @@ -224,7 +225,7 @@ BOOL LLVOCacheEntry::writeToFile(LLAPRFile* apr_file) const // Format string used to construct filename for the object cache static const char OBJECT_CACHE_FILENAME[] = "objects_%d_%d.slc"; -const U32 NUM_ENTRIES_TO_PURGE = 16 ; +const U32 NUM_ENTRIES_TO_PURGE = 50; const char* object_cache_dirname = "objectcache"; const char* header_filename = "object.cache"; @@ -259,7 +260,6 @@ void LLVOCache::destroyClass() LLVOCache::LLVOCache(): mInitialized(FALSE), mReadOnly(TRUE), - mNumEntries(0), mCacheSize(1) { mEnabled = gSavedSettings.getBOOL("ObjectCacheEnabled"); @@ -286,8 +286,15 @@ void LLVOCache::setDirNames(ELLPath location) void LLVOCache::initCache(ELLPath location, U32 size, U32 cache_version) { - if(mInitialized || !mEnabled) + if(!mEnabled) + { + llwarns << "Not initializing cache: Cache is currently disabled." << llendl; + return ; + } + + if(mInitialized) { + llwarns << "Cache already initialized." << llendl; return ; } @@ -321,6 +328,7 @@ void LLVOCache::removeCache(ELLPath location) { if(mReadOnly) { + llwarns << "Not removing cache at " << location << ": Cache is currently in read-only mode." << llendl; return ; } @@ -339,6 +347,7 @@ void LLVOCache::removeCache() llassert_always(mInitialized) ; if(mReadOnly) { + llwarns << "Not clearing object cache: Cache is currently in read-only mode." << llendl; return ; } @@ -352,16 +361,8 @@ void LLVOCache::removeCache() void LLVOCache::clearCacheInMemory() { - if(!mHeaderEntryQueue.empty()) - { - for(header_entry_queue_t::iterator iter = mHeaderEntryQueue.begin(); iter != mHeaderEntryQueue.end(); ++iter) - { - delete *iter ; - } - mHeaderEntryQueue.clear(); - mHandleEntryMap.clear(); - mNumEntries = 0 ; - } + std::for_each(mHandleEntryMap.begin(), mHandleEntryMap.end(), DeletePairedPointer()); + mHandleEntryMap.clear(); } void LLVOCache::getObjectCacheFilename(U64 handle, std::string& filename) @@ -379,6 +380,7 @@ void LLVOCache::removeFromCache(U64 handle) { if(mReadOnly) { + llwarns << "Not removing cache for handle " << handle << ": Cache is currently in read-only mode." << llendl; return ; } @@ -391,7 +393,6 @@ BOOL LLVOCache::checkRead(LLAPRFile* apr_file, void* src, S32 n_bytes) { if(!check_read(apr_file, src, n_bytes)) { - delete apr_file ; removeCache() ; return FALSE ; } @@ -403,7 +404,6 @@ BOOL LLVOCache::checkWrite(LLAPRFile* apr_file, void* src, S32 n_bytes) { if(!check_write(apr_file, src, n_bytes)) { - delete apr_file ; removeCache() ; return FALSE ; } @@ -415,7 +415,8 @@ void LLVOCache::readCacheHeader() { if(!mEnabled) { - return ; + llwarns << "Not reading cache header: Cache is currently disabled." << llendl; + return; } //clear stale info. @@ -428,28 +429,29 @@ void LLVOCache::readCacheHeader() //read the meta element if(!checkRead(apr_file, &mMetaInfo, sizeof(HeaderMetaInfo))) { - return ; + llwarns << "Error reading meta information from cache header." << llendl; + delete apr_file; + return; } HeaderEntryInfo* entry ; - mNumEntries = 0 ; - while(mNumEntries < mCacheSize) + for(U32 entry_index = 0; entry_index < mCacheSize; ++entry_index) { entry = new HeaderEntryInfo() ; if(!checkRead(apr_file, entry, sizeof(HeaderEntryInfo))) { + llwarns << "Error reading cache header entry. (entry_index=" << entry_index << ")" << llendl; delete entry ; - return ; + break; } else if(!entry->mTime) //end of the cache. { delete entry ; - return ; + break; } - entry->mIndex = mNumEntries++ ; - mHeaderEntryQueue.insert(entry) ; - mHandleEntryMap[entry->mHandle] = entry ; + entry->mIndex = entry_index; + mHandleEntryMap[entry->mHandle] = entry; } delete apr_file ; @@ -462,40 +464,57 @@ void LLVOCache::readCacheHeader() void LLVOCache::writeCacheHeader() { - if(mReadOnly || !mEnabled) + if (!mEnabled) { - return ; - } + llwarns << "Not writing cache header: Cache is currently disabled." << llendl; + return; + } + + if(mReadOnly) + { + llwarns << "Not writing cache header: Cache is currently in read-only mode." << llendl; + return; + } LLAPRFile* apr_file = new LLAPRFile(mHeaderFileName, APR_CREATE|APR_WRITE|APR_BINARY, mLocalAPRFilePoolp); //write the meta element if(!checkWrite(apr_file, &mMetaInfo, sizeof(HeaderMetaInfo))) { - return ; + llwarns << "Error writing meta information to cache header." << llendl; + delete apr_file; + return; } - mNumEntries = 0 ; - for(header_entry_queue_t::iterator iter = mHeaderEntryQueue.begin() ; iter != mHeaderEntryQueue.end(); ++iter) + U32 entry_index = 0; + handle_entry_map_t::iterator iter_end = mHandleEntryMap.end(); + for(handle_entry_map_t::iterator iter = mHandleEntryMap.begin(); + iter != iter_end; + ++iter) { - (*iter)->mIndex = mNumEntries++ ; - if(!checkWrite(apr_file, (void*)*iter, sizeof(HeaderEntryInfo))) + HeaderEntryInfo* entry = iter->second; + entry->mIndex = entry_index++; + if(!checkWrite(apr_file, (void*)entry, sizeof(HeaderEntryInfo))) { - return ; + llwarns << "Failed to write cache header for entry " << entry->mHandle << " (entry_index = " << entry_index << ")" << llendl; + delete apr_file; + return; } } - mNumEntries = mHeaderEntryQueue.size() ; - if(mNumEntries < mCacheSize) + // Why do we need to fill the cache header with default entries? DK 2010-12-14 + // It looks like we currently rely on the file being pre-allocated so we can seek during updateEntry(). + if(entry_index < mCacheSize) { HeaderEntryInfo* entry = new HeaderEntryInfo() ; - for(U32 i = mNumEntries ; i < mCacheSize; i++) + for(; entry_index < mCacheSize; ++entry_index) { //fill the cache with the default entry. if(!checkWrite(apr_file, entry, sizeof(HeaderEntryInfo))) { + llwarns << "Failed to fill cache header with default entries (entry_index = " << entry_index << "). Switching to read-only mode." << llendl; mReadOnly = TRUE ; //disable the cache. - return ; + break; } } delete entry ; @@ -508,13 +527,16 @@ BOOL LLVOCache::updateEntry(const HeaderEntryInfo* entry) LLAPRFile* apr_file = new LLAPRFile(mHeaderFileName, APR_WRITE|APR_BINARY, mLocalAPRFilePoolp); apr_file->seek(APR_SET, entry->mIndex * sizeof(HeaderEntryInfo) + sizeof(HeaderMetaInfo)) ; - return checkWrite(apr_file, (void*)entry, sizeof(HeaderEntryInfo)) ; + BOOL result = checkWrite(apr_file, (void*)entry, sizeof(HeaderEntryInfo)) ; + delete apr_file; + return result; } 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); @@ -522,6 +544,7 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca handle_entry_map_t::iterator iter = mHandleEntryMap.find(handle) ; if(iter == mHandleEntryMap.end()) //no cache { + llwarns << "No handle map entry for " << handle << llendl; return ; } @@ -532,12 +555,13 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca LLUUID cache_id ; if(!checkRead(apr_file, cache_id.mData, UUID_BYTES)) { + llwarns << "Error reading cache_id from " << filename << llendl; + delete apr_file; return ; } if(cache_id != id) { - llinfos << "Cache ID doesn't match for this region, discarding"<< llendl; - + llwarns << "Cache ID (" << cache_id << ") doesn't match id for this region (" << id << "), discarding. handle = " << handle << llendl; delete apr_file ; return ; } @@ -545,6 +569,8 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca S32 num_entries; if(!checkRead(apr_file, &num_entries, sizeof(S32))) { + llwarns << "Error reading num_entries from " << filename << llendl; + delete apr_file; return ; } @@ -553,13 +579,12 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca LLVOCacheEntry* entry = new LLVOCacheEntry(apr_file); if (!entry->getLocalID()) { - llwarns << "Aborting cache file load for " << filename << ", cache file corruption!" << llendl; + llwarns << "Aborting cache file load for " << filename << ", cache file corruption! (entry number = " << i << ")" << llendl; delete entry ; break; } cache_entry_map[entry->getLocalID()] = entry; } - num_entries = cache_entry_map.size() ; delete apr_file ; return ; @@ -568,40 +593,53 @@ void LLVOCache::readFromCache(U64 handle, const LLUUID& id, LLVOCacheEntry::voca void LLVOCache::purgeEntries() { U32 limit = mCacheSize - NUM_ENTRIES_TO_PURGE ; - while(mHeaderEntryQueue.size() > limit) + // Construct a vector of entries out of the map so we can sort by time. + std::vector header_vector; + handle_entry_map_t::iterator iter_end = mHandleEntryMap.end(); + for (handle_entry_map_t::iterator iter = mHandleEntryMap.begin(); + iter != iter_end; + ++iter) + { + header_vector.push_back(iter->second); + } + // Sort by time, oldest first. + std::sort(header_vector.begin(), header_vector.end(), header_entry_less()); + while(header_vector.size() > limit) { - header_entry_queue_t::iterator iter = mHeaderEntryQueue.begin() ; - HeaderEntryInfo* entry = *iter ; + HeaderEntryInfo* entry = header_vector.front(); - removeFromCache(entry->mHandle) ; - mHandleEntryMap.erase(entry->mHandle) ; - mHeaderEntryQueue.erase(iter) ; - delete entry ; + removeFromCache(entry->mHandle); + mHandleEntryMap.erase(entry->mHandle); + header_vector.erase(header_vector.begin()); + delete entry; } writeCacheHeader() ; + // *TODO: Verify that we can avoid re-reading the cache header. DK 2010-12-14 readCacheHeader() ; - mNumEntries = mHandleEntryMap.size() ; } void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry::vocache_entry_map_t& cache_entry_map, BOOL dirty_cache) { if(!mEnabled) { + llwarns << "Not writing cache for handle " << handle << "): Cache is currently disabled." << llendl; return ; } llassert_always(mInitialized); if(mReadOnly) { + llwarns << "Not writing cache for handle " << handle << "): Cache is currently in read-only mode." << llendl; return ; } HeaderEntryInfo* entry; handle_entry_map_t::iterator iter = mHandleEntryMap.find(handle) ; + U32 num_handle_entries = mHandleEntryMap.size(); if(iter == mHandleEntryMap.end()) //new entry - { - if(mNumEntries >= mCacheSize) + { + if(num_handle_entries >= mCacheSize) { purgeEntries() ; } @@ -609,28 +647,26 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry: entry = new HeaderEntryInfo(); entry->mHandle = handle ; entry->mTime = time(NULL) ; - entry->mIndex = mNumEntries++ ; - mHeaderEntryQueue.insert(entry) ; + entry->mIndex = num_handle_entries++; mHandleEntryMap[handle] = entry ; } else { + // Update access time. entry = iter->second ; entry->mTime = time(NULL) ; - - //resort - mHeaderEntryQueue.erase(entry) ; - mHeaderEntryQueue.insert(entry) ; } //update cache header if(!updateEntry(entry)) { + llwarns << "Failed to update cache header index " << entry->mIndex << ". handle = " << handle << llendl; return ; //update failed. } if(!dirty_cache) { + llwarns << "Skipping write to cache for handle " << handle << ": cache not dirty" << llendl; return ; //nothing changed, no need to update. } @@ -641,12 +677,16 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry: if(!checkWrite(apr_file, (void*)id.mData, UUID_BYTES)) { + llwarns << "Error writing id to " << filename << llendl; + delete apr_file; return ; } S32 num_entries = cache_entry_map.size() ; if(!checkWrite(apr_file, &num_entries, sizeof(S32))) { + llwarns << "Error writing num_entries to " << filename << llendl; + delete apr_file; return ; } @@ -654,10 +694,10 @@ void LLVOCache::writeToCache(U64 handle, const LLUUID& id, const LLVOCacheEntry: { if(!iter->second->writeToFile(apr_file)) { + llwarns << "Aborting cache file write for " << filename << ", error writing to file!" << llendl; //failed - delete apr_file ; removeCache() ; - return ; + break; } } -- cgit v1.2.3