Limit train samples (#2809)
* Limit training samples size to 2GB * simplified DISPLAYLEVEL() macro to use global vqriable instead of local. * refactored training samples loading * fixed compiler warning * addressed comments from the pull request * addressed @terrelln comments * missed some fixes * fixed type mismatch * Fixed bug passing estimated number of samples rather insted of the loaded number of samples. Changed unit conversion not to use bit-shifts. * fixed a declaration after code * fixed type conversion compile errors * fixed more type castting * fixed more type mismatching * changed sizes type to size_t * move type casting * more type cast fixes
This commit is contained in:
stanjo74
GitHub
parent
7868f38019
commit
52598d54e9
@ -40,6 +40,13 @@
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/*-*************************************
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* Constants
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***************************************/
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/**
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* There are 32bit indexes used to ref samples, so limit samples size to 4GB
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* on 64bit builds.
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* For 32bit builds we choose 1 GB.
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* Most 32bit platforms have 2GB user-mode addressable space and we allocate a large
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* contiguous buffer, so 1GB is already a high limit.
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*/
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#define COVER_MAX_SAMPLES_SIZE (sizeof(size_t) == 8 ? ((unsigned)-1) : ((unsigned)1 GB))
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#define COVER_DEFAULT_SPLITPOINT 1.0
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@ -32,6 +32,13 @@
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/*-*************************************
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* Constants
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***************************************/
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/**
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* There are 32bit indexes used to ref samples, so limit samples size to 4GB
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* on 64bit builds.
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* For 32bit builds we choose 1 GB.
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* Most 32bit platforms have 2GB user-mode addressable space and we allocate a large
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* contiguous buffer, so 1GB is already a high limit.
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*/
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#define FASTCOVER_MAX_SAMPLES_SIZE (sizeof(size_t) == 8 ? ((unsigned)-1) : ((unsigned)1 GB))
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#define FASTCOVER_MAX_F 31
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#define FASTCOVER_MAX_ACCEL 10
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219
programs/dibio.c
219
programs/dibio.c
@ -49,6 +49,7 @@
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static const size_t g_maxMemory = (sizeof(size_t) == 4) ? (2 GB - 64 MB) : ((size_t)(512 MB) << sizeof(size_t));
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#define NOISELENGTH 32
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#define MAX_SAMPLES_SIZE (2 GB) /* training dataset limited to 2GB */
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/*-*************************************
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@ -88,6 +89,15 @@ static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
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#undef MIN
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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/**
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Returns the size of a file.
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If error returns -1.
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*/
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static S64 DiB_getFileSize (const char * fileName)
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{
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U64 const fileSize = UTIL_getFileSize(fileName);
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return (fileSize == UTIL_FILESIZE_UNKNOWN) ? -1 : (S64)fileSize;
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}
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/* ********************************************************
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* File related operations
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@ -101,47 +111,67 @@ static UTIL_time_t g_displayClock = UTIL_TIME_INITIALIZER;
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* *bufferSizePtr is modified, it provides the amount data loaded within buffer.
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* sampleSizes is filled with the size of each sample.
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*/
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static unsigned DiB_loadFiles(void* buffer, size_t* bufferSizePtr,
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size_t* sampleSizes, unsigned sstSize,
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const char** fileNamesTable, unsigned nbFiles, size_t targetChunkSize,
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unsigned displayLevel)
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static int DiB_loadFiles(
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void* buffer, size_t* bufferSizePtr,
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size_t* sampleSizes, int sstSize,
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const char** fileNamesTable, int nbFiles,
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size_t targetChunkSize, int displayLevel )
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{
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char* const buff = (char*)buffer;
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size_t pos = 0;
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unsigned nbLoadedChunks = 0, fileIndex;
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size_t totalDataLoaded = 0;
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int nbSamplesLoaded = 0;
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int fileIndex = 0;
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FILE * f = NULL;
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for (fileIndex=0; fileIndex<nbFiles; fileIndex++) {
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const char* const fileName = fileNamesTable[fileIndex];
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unsigned long long const fs64 = UTIL_getFileSize(fileName);
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unsigned long long remainingToLoad = (fs64 == UTIL_FILESIZE_UNKNOWN) ? 0 : fs64;
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U32 const nbChunks = targetChunkSize ? (U32)((fs64 + (targetChunkSize-1)) / targetChunkSize) : 1;
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U64 const chunkSize = targetChunkSize ? MIN(targetChunkSize, fs64) : fs64;
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size_t const maxChunkSize = (size_t)MIN(chunkSize, SAMPLESIZE_MAX);
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U32 cnb;
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FILE* const f = fopen(fileName, "rb");
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if (f==NULL) EXM_THROW(10, "zstd: dictBuilder: %s %s ", fileName, strerror(errno));
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DISPLAYUPDATE(2, "Loading %s... \r", fileName);
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for (cnb=0; cnb<nbChunks; cnb++) {
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size_t const toLoad = (size_t)MIN(maxChunkSize, remainingToLoad);
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if (toLoad > *bufferSizePtr-pos) break;
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{ size_t const readSize = fread(buff+pos, 1, toLoad, f);
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if (readSize != toLoad) EXM_THROW(11, "Pb reading %s", fileName);
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pos += readSize;
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sampleSizes[nbLoadedChunks++] = toLoad;
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remainingToLoad -= targetChunkSize;
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if (nbLoadedChunks == sstSize) { /* no more space left in sampleSizes table */
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fileIndex = nbFiles; /* stop there */
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assert(targetChunkSize <= SAMPLESIZE_MAX);
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while ( nbSamplesLoaded < sstSize && fileIndex < nbFiles ) {
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size_t fileDataLoaded;
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S64 const fileSize = DiB_getFileSize(fileNamesTable[fileIndex]);
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if (fileSize <= 0) /* skip if zero-size or file error */
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continue;
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f = fopen( fileNamesTable[fileIndex], "rb");
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if (f == NULL)
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EXM_THROW(10, "zstd: dictBuilder: %s %s ", fileNamesTable[fileIndex], strerror(errno));
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DISPLAYUPDATE(2, "Loading %s... \r", fileNamesTable[fileIndex]);
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/* Load the first chunk of data from the file */
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fileDataLoaded = targetChunkSize > 0 ?
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(size_t)MIN(fileSize, (S64)targetChunkSize) :
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(size_t)MIN(fileSize, SAMPLESIZE_MAX );
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if (totalDataLoaded + fileDataLoaded > *bufferSizePtr)
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break;
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if (fread( buff+totalDataLoaded, 1, fileDataLoaded, f ) != fileDataLoaded)
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EXM_THROW(11, "Pb reading %s", fileNamesTable[fileIndex]);
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sampleSizes[nbSamplesLoaded++] = fileDataLoaded;
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totalDataLoaded += fileDataLoaded;
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/* If file-chunking is enabled, load the rest of the file as more samples */
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if (targetChunkSize > 0) {
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while( (S64)fileDataLoaded < fileSize && nbSamplesLoaded < sstSize ) {
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size_t const chunkSize = MIN((size_t)(fileSize-fileDataLoaded), targetChunkSize);
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if (totalDataLoaded + chunkSize > *bufferSizePtr) /* buffer is full */
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break;
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if (fread( buff+totalDataLoaded, 1, chunkSize, f ) != chunkSize)
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EXM_THROW(11, "Pb reading %s", fileNamesTable[fileIndex]);
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sampleSizes[nbSamplesLoaded++] = chunkSize;
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totalDataLoaded += chunkSize;
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fileDataLoaded += chunkSize;
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}
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if (toLoad < targetChunkSize) {
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fseek(f, (long)(targetChunkSize - toLoad), SEEK_CUR);
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} } }
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}
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fileIndex += 1;
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fclose(f); f = NULL;
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}
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if (f != NULL)
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fclose(f);
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}
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DISPLAYLEVEL(2, "\r%79s\r", "");
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*bufferSizePtr = pos;
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DISPLAYLEVEL(4, "loaded : %u KB \n", (unsigned)(pos >> 10))
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return nbLoadedChunks;
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DISPLAYLEVEL(4, "Loaded %d KB total training data, %d nb samples \n",
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(int)(totalDataLoaded / (1 KB)), nbSamplesLoaded );
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*bufferSizePtr = totalDataLoaded;
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return nbSamplesLoaded;
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}
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#define DiB_rotl32(x,r) ((x << r) | (x >> (32 - r)))
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@ -223,11 +253,10 @@ static void DiB_saveDict(const char* dictFileName,
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if (n!=0) EXM_THROW(5, "%s : flush error", dictFileName) }
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}
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typedef struct {
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U64 totalSizeToLoad;
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unsigned oneSampleTooLarge;
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unsigned nbSamples;
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S64 totalSizeToLoad;
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int nbSamples;
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int oneSampleTooLarge;
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} fileStats;
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/*! DiB_fileStats() :
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@ -235,45 +264,86 @@ typedef struct {
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* provides the amount of data to be loaded and the resulting nb of samples.
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* This is useful primarily for allocation purpose => sample buffer, and sample sizes table.
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*/
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static fileStats DiB_fileStats(const char** fileNamesTable, unsigned nbFiles, size_t chunkSize, unsigned displayLevel)
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static fileStats DiB_fileStats(const char** fileNamesTable, int nbFiles, size_t chunkSize, int displayLevel)
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{
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fileStats fs;
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unsigned n;
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int n;
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memset(&fs, 0, sizeof(fs));
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// We assume that if chunking is requsted, the chunk size is < SAMPLESIZE_MAX
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assert( chunkSize <= SAMPLESIZE_MAX );
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for (n=0; n<nbFiles; n++) {
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U64 const fileSize = UTIL_getFileSize(fileNamesTable[n]);
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U64 const srcSize = (fileSize == UTIL_FILESIZE_UNKNOWN) ? 0 : fileSize;
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U32 const nbSamples = (U32)(chunkSize ? (srcSize + (chunkSize-1)) / chunkSize : 1);
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U64 const chunkToLoad = chunkSize ? MIN(chunkSize, srcSize) : srcSize;
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size_t const cappedChunkSize = (size_t)MIN(chunkToLoad, SAMPLESIZE_MAX);
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fs.totalSizeToLoad += cappedChunkSize * nbSamples;
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fs.oneSampleTooLarge |= (chunkSize > 2*SAMPLESIZE_MAX);
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fs.nbSamples += nbSamples;
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S64 const fileSize = DiB_getFileSize(fileNamesTable[n]);
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// TODO: is there a minimum sample size? What if the file is 1-byte?
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if (fileSize == 0) {
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DISPLAYLEVEL(3, "Sample file '%s' has zero size, skipping...\n", fileNamesTable[n]);
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continue;
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}
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DISPLAYLEVEL(4, "Preparing to load : %u KB \n", (unsigned)(fs.totalSizeToLoad >> 10));
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/* the case where we are breaking up files in sample chunks */
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if (chunkSize > 0)
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{
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// TODO: is there a minimum sample size? Can we have a 1-byte sample?
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fs.nbSamples += (int)((fileSize + chunkSize-1) / chunkSize);
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fs.totalSizeToLoad += fileSize;
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}
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else {
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/* the case where one file is one sample */
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if (fileSize > SAMPLESIZE_MAX) {
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/* flag excessively large sample files */
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fs.oneSampleTooLarge |= (fileSize > 2*SAMPLESIZE_MAX);
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/* Limit to the first SAMPLESIZE_MAX (128kB) of the file */
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DISPLAYLEVEL(3, "Sample file '%s' is too large, limiting to %d KB",
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fileNamesTable[n], SAMPLESIZE_MAX / (1 KB));
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}
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fs.nbSamples += 1;
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fs.totalSizeToLoad += MIN(fileSize, SAMPLESIZE_MAX);
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}
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}
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DISPLAYLEVEL(4, "Found training data %d files, %d KB, %d samples\n", nbFiles, (int)(fs.totalSizeToLoad / (1 KB)), fs.nbSamples);
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return fs;
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}
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int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize,
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const char** fileNamesTable, unsigned nbFiles, size_t chunkSize,
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int DiB_trainFromFiles(const char* dictFileName, size_t maxDictSize,
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const char** fileNamesTable, int nbFiles, size_t chunkSize,
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ZDICT_legacy_params_t* params, ZDICT_cover_params_t* coverParams,
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ZDICT_fastCover_params_t* fastCoverParams, int optimize)
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{
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unsigned const displayLevel = params ? params->zParams.notificationLevel :
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coverParams ? coverParams->zParams.notificationLevel :
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fastCoverParams ? fastCoverParams->zParams.notificationLevel :
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0; /* should never happen */
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fileStats fs;
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size_t* sampleSizes; /* vector of sample sizes. Each sample can be up to SAMPLESIZE_MAX */
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int nbSamplesLoaded; /* nb of samples effectively loaded in srcBuffer */
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size_t loadedSize; /* total data loaded in srcBuffer for all samples */
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void* srcBuffer /* contiguous buffer with training data/samples */;
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void* const dictBuffer = malloc(maxDictSize);
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fileStats const fs = DiB_fileStats(fileNamesTable, nbFiles, chunkSize, displayLevel);
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size_t* const sampleSizes = (size_t*)malloc(fs.nbSamples * sizeof(size_t));
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size_t const memMult = params ? MEMMULT :
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int result = 0;
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int const displayLevel = params ? params->zParams.notificationLevel :
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coverParams ? coverParams->zParams.notificationLevel :
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fastCoverParams ? fastCoverParams->zParams.notificationLevel : 0;
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/* Shuffle input files before we start assessing how much sample datA to load.
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The purpose of the shuffle is to pick random samples when the sample
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set is larger than what we can load in memory. */
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DISPLAYLEVEL(3, "Shuffling input files\n");
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DiB_shuffle(fileNamesTable, nbFiles);
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/* Figure out how much sample data to load with how many samples */
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fs = DiB_fileStats(fileNamesTable, nbFiles, chunkSize, displayLevel);
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{
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int const memMult = params ? MEMMULT :
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coverParams ? COVER_MEMMULT:
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FASTCOVER_MEMMULT;
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size_t const maxMem = DiB_findMaxMem(fs.totalSizeToLoad * memMult) / memMult;
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size_t loadedSize = (size_t) MIN ((unsigned long long)maxMem, fs.totalSizeToLoad);
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void* const srcBuffer = malloc(loadedSize+NOISELENGTH);
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int result = 0;
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/* Limit the size of the training data to the free memory */
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/* Limit the size of the training data to 2GB */
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/* TODO: there is oportunity to stop DiB_fileStats() early when the data limit is reached */
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loadedSize = (size_t)MIN( MIN((S64)maxMem, fs.totalSizeToLoad), MAX_SAMPLES_SIZE );
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srcBuffer = malloc(loadedSize+NOISELENGTH);
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sampleSizes = (size_t*)malloc(fs.nbSamples * sizeof(size_t));
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}
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/* Checks */
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if ((!sampleSizes) || (!srcBuffer) || (!dictBuffer))
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@ -289,31 +359,32 @@ int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize,
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DISPLAYLEVEL(2, "! Alternatively, split files into fixed-size blocks representative of samples, with -B# \n");
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EXM_THROW(14, "nb of samples too low"); /* we now clearly forbid this case */
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}
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if (fs.totalSizeToLoad < (unsigned long long)maxDictSize * 8) {
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if (fs.totalSizeToLoad < (S64)maxDictSize * 8) {
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DISPLAYLEVEL(2, "! Warning : data size of samples too small for target dictionary size \n");
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DISPLAYLEVEL(2, "! Samples should be about 100x larger than target dictionary size \n");
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}
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/* init */
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if (loadedSize < fs.totalSizeToLoad)
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DISPLAYLEVEL(1, "Not enough memory; training on %u MB only...\n", (unsigned)(loadedSize >> 20));
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if ((S64)loadedSize < fs.totalSizeToLoad)
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DISPLAYLEVEL(1, "Training samples set too large (%u MB); training on %u MB only...\n",
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(unsigned)(fs.totalSizeToLoad / (1 MB)),
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(unsigned)(loadedSize / (1 MB)));
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/* Load input buffer */
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DISPLAYLEVEL(3, "Shuffling input files\n");
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DiB_shuffle(fileNamesTable, nbFiles);
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DiB_loadFiles(srcBuffer, &loadedSize, sampleSizes, fs.nbSamples, fileNamesTable, nbFiles, chunkSize, displayLevel);
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nbSamplesLoaded = DiB_loadFiles(
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srcBuffer, &loadedSize, sampleSizes, fs.nbSamples, fileNamesTable,
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nbFiles, chunkSize, displayLevel);
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{ size_t dictSize;
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if (params) {
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DiB_fillNoise((char*)srcBuffer + loadedSize, NOISELENGTH); /* guard band, for end of buffer condition */
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dictSize = ZDICT_trainFromBuffer_legacy(dictBuffer, maxDictSize,
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srcBuffer, sampleSizes, fs.nbSamples,
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srcBuffer, sampleSizes, nbSamplesLoaded,
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*params);
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} else if (coverParams) {
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if (optimize) {
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dictSize = ZDICT_optimizeTrainFromBuffer_cover(dictBuffer, maxDictSize,
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srcBuffer, sampleSizes, fs.nbSamples,
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srcBuffer, sampleSizes, nbSamplesLoaded,
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coverParams);
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if (!ZDICT_isError(dictSize)) {
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unsigned splitPercentage = (unsigned)(coverParams->splitPoint * 100);
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@ -322,13 +393,13 @@ int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize,
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}
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} else {
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dictSize = ZDICT_trainFromBuffer_cover(dictBuffer, maxDictSize, srcBuffer,
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sampleSizes, fs.nbSamples, *coverParams);
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sampleSizes, nbSamplesLoaded, *coverParams);
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}
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} else {
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assert(fastCoverParams != NULL);
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if (optimize) {
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dictSize = ZDICT_optimizeTrainFromBuffer_fastCover(dictBuffer, maxDictSize,
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srcBuffer, sampleSizes, fs.nbSamples,
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srcBuffer, sampleSizes, nbSamplesLoaded,
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fastCoverParams);
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if (!ZDICT_isError(dictSize)) {
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unsigned splitPercentage = (unsigned)(fastCoverParams->splitPoint * 100);
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@ -338,7 +409,7 @@ int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize,
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}
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} else {
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dictSize = ZDICT_trainFromBuffer_fastCover(dictBuffer, maxDictSize, srcBuffer,
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sampleSizes, fs.nbSamples, *fastCoverParams);
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sampleSizes, nbSamplesLoaded, *fastCoverParams);
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}
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}
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if (ZDICT_isError(dictSize)) {
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@ -31,8 +31,8 @@
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`parameters` is optional and can be provided with values set to 0, meaning "default".
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@return : 0 == ok. Any other : error.
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*/
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int DiB_trainFromFiles(const char* dictFileName, unsigned maxDictSize,
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const char** fileNamesTable, unsigned nbFiles, size_t chunkSize,
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int DiB_trainFromFiles(const char* dictFileName, size_t maxDictSize,
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const char** fileNamesTable, int nbFiles, size_t chunkSize,
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ZDICT_legacy_params_t* params, ZDICT_cover_params_t* coverParams,
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ZDICT_fastCover_params_t* fastCoverParams, int optimize);
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@ -1290,18 +1290,18 @@ int main(int argCount, const char* argv[])
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int const optimize = !coverParams.k || !coverParams.d;
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coverParams.nbThreads = (unsigned)nbWorkers;
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coverParams.zParams = zParams;
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operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (unsigned)filenames->tableSize, blockSize, NULL, &coverParams, NULL, optimize);
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operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, NULL, &coverParams, NULL, optimize);
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} else if (dict == fastCover) {
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int const optimize = !fastCoverParams.k || !fastCoverParams.d;
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fastCoverParams.nbThreads = (unsigned)nbWorkers;
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fastCoverParams.zParams = zParams;
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operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (unsigned)filenames->tableSize, blockSize, NULL, NULL, &fastCoverParams, optimize);
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operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, NULL, NULL, &fastCoverParams, optimize);
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} else {
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ZDICT_legacy_params_t dictParams;
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memset(&dictParams, 0, sizeof(dictParams));
|
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dictParams.selectivityLevel = dictSelect;
|
||||
dictParams.zParams = zParams;
|
||||
operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (unsigned)filenames->tableSize, blockSize, &dictParams, NULL, NULL, 0);
|
||||
operationResult = DiB_trainFromFiles(outFileName, maxDictSize, filenames->fileNames, (int)filenames->tableSize, blockSize, &dictParams, NULL, NULL, 0);
|
||||
}
|
||||
#else
|
||||
(void)dictCLevel; (void)dictSelect; (void)dictID; (void)maxDictSize; /* not used when ZSTD_NODICT set */
|
||||
|
||||
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Reference in New Issue
Block a user