bench.c - lz4 - Rivoreo Source Code Repositories

 /*
     bench.c - Demo program to benchmark open-source compression algorithm
     Copyright (C) Yann Collet 2012
 	GPL v2 License

     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.

     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.

     You should have received a copy of the GNU General Public License along
     with this program; if not, write to the Free Software Foundation, Inc.,
     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 	You can contact the author at :
 	- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
 	- LZ4 source repository : http://code.google.com/p/lz4/
 */

 //**************************************
 // Compiler Options
 //**************************************
 // Disable some Visual warning messages
 #define _CRT_SECURE_NO_WARNINGS
 #define _CRT_SECURE_NO_DEPRECATE     // VS2005

 // Unix Large Files support (>4GB)
 #if (defined(__sun__) && (!defined(__LP64__)))   // Sun Solaris 32-bits requires specific definitions
 #  define _LARGEFILE_SOURCE
 #  define FILE_OFFSET_BITS=64
 #elif ! defined(__LP64__)                        // No point defining Large file for 64 bit
 #  define _LARGEFILE64_SOURCE
 #endif

 // S_ISREG & gettimeofday() are not supported by MSVC
 #if defined(_MSC_VER)
 #  define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
 #  define BMK_LEGACY_TIMER 1
 #endif

 // GCC does not support _rotl outside of Windows
 #if !defined(_WIN32)
 #  define _rotl(x,r) ((x << r) | (x >> (32 - r)))
 #endif


 //**************************************
 // Includes
 //**************************************
 #include <stdlib.h>      // malloc
 #include <stdio.h>       // fprintf, fopen, ftello64
 #include <sys/types.h>   // stat64
 #include <sys/stat.h>    // stat64

 // Use ftime() if gettimeofday() is not available on your target
 #if defined(BMK_LEGACY_TIMER)
 #  include <sys/timeb.h>   // timeb, ftime
 #else
 #  include <sys/time.h>    // gettimeofday
 #endif

 #include "lz4.h"
 #define COMPRESSOR0 LZ4_compress
 #include "lz4hc.h"
 #define COMPRESSOR1 LZ4_compressHC
 #define DEFAULTCOMPRESSOR LZ4_compress


 //**************************************
 // Basic Types
 //**************************************
 #if defined(_MSC_VER)    // Visual Studio does not support 'stdint' natively
 #define BYTE	unsigned __int8
 #define U16		unsigned __int16
 #define U32		unsigned __int32
 #define S32		__int32
 #define U64		unsigned __int64
 #else
 #include <stdint.h>
 #define BYTE	uint8_t
 #define U16		uint16_t
 #define U32		uint32_t
 #define S32		int32_t
 #define U64		uint64_t
 #endif


 //**************************************
 // Constants
 //**************************************
 #define NBLOOPS		3
 #define TIMELOOP	2000

 #define KNUTH		2654435761U
 #define MAX_MEM		(1984<<20)
 #define DEFAULT_CHUNKSIZE   (8<<20)


 //**************************************
 // Local structures
 //**************************************
 struct chunkParameters
 {
 	U32   id;
 	char* inputBuffer;
 	char* outputBuffer;
 	int   inputSize;
 	int   outputSize;
 };

 struct compressionParameters
 {
 	int (*compressionFunction)(const char*, char*, int);
 	int (*decompressionFunction)(const char*, char*, int);
 };


 //**************************************
 // MACRO
 //**************************************
 #define DISPLAY(...) fprintf(stderr, __VA_ARGS__)


 //**************************************
 // Benchmark Parameters
 //**************************************
 static int chunkSize = DEFAULT_CHUNKSIZE;
 static int nbIterations = NBLOOPS;

 void BMK_SetBlocksize(int bsize)
 {
 	chunkSize = bsize;
 	DISPLAY("-Using Block Size of %i KB-", chunkSize>>10);
 }

 void BMK_SetNbIterations(int nbLoops)
 {
 	nbIterations = nbLoops;
 	DISPLAY("- %i iterations-", nbIterations);
 }


 //*********************************************************
 //  Private functions
 //*********************************************************

 #if defined(BMK_LEGACY_TIMER)

 static int BMK_GetMilliStart()
 {
   // Based on Legacy ftime()
   // Rolls over every ~ 12.1 days (0x100000/24/60/60)
   // Use GetMilliSpan to correct for rollover
   struct timeb tb;
   int nCount;
   ftime( &tb );
   nCount = (int) (tb.millitm + (tb.time & 0xfffff) * 1000);
   return nCount;
 }

 #else

 static int BMK_GetMilliStart()
 {
   // Based on newer gettimeofday()
   // Use GetMilliSpan to correct for rollover
   struct timeval tv;
   int nCount;
   gettimeofday(&tv, NULL);
   nCount = (int) (tv.tv_usec/1000 + (tv.tv_sec & 0xfffff) * 1000);
   return nCount;
 }

 #endif


 static int BMK_GetMilliSpan( int nTimeStart )
 {
   int nSpan = BMK_GetMilliStart() - nTimeStart;
   if ( nSpan < 0 )
     nSpan += 0x100000 * 1000;
   return nSpan;
 }


 static U32 BMK_checksum_MMH3A (char* buff, U32 length)
 {
   const BYTE* data = (const BYTE*)buff;
   const int nblocks = length >> 2;

   U32 h1 = KNUTH;
   U32 c1 = 0xcc9e2d51;
   U32 c2 = 0x1b873593;

   const U32* blocks = (const U32*)(data + nblocks*4);
   int i;

   for(i = -nblocks; i; i++)
   {
     U32 k1 = blocks[i];

     k1 *= c1;
     k1 = _rotl(k1,15);
     k1 *= c2;

     h1 ^= k1;
     h1 = _rotl(h1,13);
     h1 = h1*5+0xe6546b64;
   }

   {
 	  const BYTE* tail = (const BYTE*)(data + nblocks*4);
 	  U32 k1 = 0;

 	  switch(length & 3)
 	  {
 	  case 3: k1 ^= tail[2] << 16;
 	  case 2: k1 ^= tail[1] << 8;
 	  case 1: k1 ^= tail[0];
 			  k1 *= c1; k1 = _rotl(k1,15); k1 *= c2; h1 ^= k1;
 	  };
   }

   h1 ^= length;
   h1 ^= h1 >> 16;
   h1 *= 0x85ebca6b;
   h1 ^= h1 >> 13;
   h1 *= 0xc2b2ae35;
   h1 ^= h1 >> 16;

   return h1;
 }


 static size_t BMK_findMaxMem(U64 requiredMem)
 {
 	size_t step = (64U<<20);   // 64 MB
 	BYTE* testmem=NULL;

 	requiredMem = (((requiredMem >> 25) + 1) << 26);
 	if (requiredMem > MAX_MEM) requiredMem = MAX_MEM;

 	requiredMem += 2*step;
 	while (!testmem)
 	{
 		requiredMem -= step;
 		testmem = malloc ((size_t)requiredMem);
 	}

 	free (testmem);
 	return (size_t) (requiredMem - step);
 }


 static U64 BMK_GetFileSize(char* infilename)
 {
 	int r;
 #if defined(_MSC_VER)
 	struct _stat64 statbuf;
 	r = _stat64(infilename, &statbuf);
 #else
 	struct stat statbuf;
 	r = stat(infilename, &statbuf);
 #endif
 	if (r || !S_ISREG(statbuf.st_mode)) return 0;   // No good...
 	return (U64)statbuf.st_size;
 }


 //*********************************************************
 //  Public function
 //*********************************************************

 int BMK_benchFile(char** fileNamesTable, int nbFiles, int cLevel)
 {
   int fileIdx=0;
   FILE* fileIn;
   char* infilename;
   U64 largefilesize;
   size_t benchedsize;
   int nbChunks;
   int maxCChunkSize;
   size_t readSize;
   char* in_buff;
   char* out_buff; int out_buff_size;
   struct chunkParameters* chunkP;
   U32 crcc, crcd=0;
   struct compressionParameters compP;

   U64 totals = 0;
   U64 totalz = 0;
   double totalc = 0.;
   double totald = 0.;


   // Init
   switch (cLevel)
   {
 #ifdef COMPRESSOR0
   case 0 : compP.compressionFunction = COMPRESSOR0; break;
 #endif
 #ifdef COMPRESSOR1
   case 1 : compP.compressionFunction = COMPRESSOR1; break;
 #endif
   default : compP.compressionFunction = DEFAULTCOMPRESSOR;
   }
   compP.decompressionFunction = LZ4_uncompress;

   // Loop for each file
   while (fileIdx<nbFiles)
   {
 	  // Check file existence
 	  infilename = fileNamesTable[fileIdx++];
 	  fileIn = fopen( infilename, "rb" );
 	  if (fileIn==NULL)
 	  {
 		DISPLAY( "Pb opening %s\n", infilename);
 		return 11;
 	  }

 	  // Memory allocation & restrictions
 	  largefilesize = BMK_GetFileSize(infilename);
 	  benchedsize = (size_t) BMK_findMaxMem(largefilesize) / 2;
 	  if ((U64)benchedsize > largefilesize) benchedsize = (size_t)largefilesize;
 	  if (benchedsize < largefilesize)
 	  {
 		  DISPLAY("Not enough memory for '%s' full size; testing %i MB only...\n", infilename, (int)(benchedsize>>20));
 	  }

 	  // Alloc
 	  chunkP = (struct chunkParameters*) malloc(((benchedsize / chunkSize)+1) * sizeof(struct chunkParameters));
 	  in_buff = malloc((size_t )benchedsize);
 	  nbChunks = (int) (benchedsize / chunkSize) + 1;
 	  maxCChunkSize = LZ4_compressBound(chunkSize);
 	  out_buff_size = nbChunks * maxCChunkSize;
 	  out_buff = malloc((size_t )out_buff_size);


 	  if(!in_buff || !out_buff)
 	  {
 		DISPLAY("\nError: not enough memory!\n");
 		free(in_buff);
 		free(out_buff);
 		fclose(fileIn);
 		return 12;
 	  }

 	  // Init chunks data
 	  {
 		  int i;
 		  size_t remaining = benchedsize;
 		  char* in = in_buff;
 		  char* out = out_buff;
 		  for (i=0; i<nbChunks; i++)
 		  {
 			  chunkP[i].id = i;
 			  chunkP[i].inputBuffer = in; in += chunkSize;
 			  if ((int)remaining > chunkSize) { chunkP[i].inputSize = chunkSize; remaining -= chunkSize; } else { chunkP[i].inputSize = (int)remaining; remaining = 0; }
 			  chunkP[i].outputBuffer = out; out += maxCChunkSize;
 			  chunkP[i].outputSize = 0;
 		  }
 	  }

 	  // Fill input buffer
 	  DISPLAY("Loading %s...       \r", infilename);
 	  readSize = fread(in_buff, 1, benchedsize, fileIn);
 	  fclose(fileIn);

 	  if(readSize != benchedsize)
 	  {
 		DISPLAY("\nError: problem reading file '%s' !!    \n", infilename);
 		free(in_buff);
 		free(out_buff);
 		return 13;
 	  }

 	  // Calculating input Checksum
 	  crcc = BMK_checksum_MMH3A(in_buff, (unsigned int)benchedsize);


 	  // Bench
 	  {
 		int loopNb, nb_loops, chunkNb;
 		size_t cSize=0;
 	    int milliTime;
 		double fastestC = 100000000., fastestD = 100000000.;
 		double ratio=0.;

 		DISPLAY("\r%79s\r", "");
 		for (loopNb = 1; loopNb <= nbIterations; loopNb++)
 		{
 		  // Compression
 		  DISPLAY("%1i-%-14.14s : %9i ->\r", loopNb, infilename, (int)benchedsize);
 		  { size_t i; for (i=0; i<benchedsize; i++) out_buff[i]=(char)i; }     // warmimg up memory

 		  nb_loops = 0;
 		  milliTime = BMK_GetMilliStart();
 		  while(BMK_GetMilliStart() == milliTime);
 		  milliTime = BMK_GetMilliStart();
 		  while(BMK_GetMilliSpan(milliTime) < TIMELOOP)
 		  {
 			for (chunkNb=0; chunkNb<nbChunks; chunkNb++)
 				chunkP[chunkNb].outputSize = compP.compressionFunction(chunkP[chunkNb].inputBuffer, chunkP[chunkNb].outputBuffer, chunkP[chunkNb].inputSize);
 			nb_loops++;
 		  }
 		  milliTime = BMK_GetMilliSpan(milliTime);

 		  if ((double)milliTime < fastestC*nb_loops) fastestC = (double)milliTime/nb_loops;
 		  cSize=0; for (chunkNb=0; chunkNb<nbChunks; chunkNb++) cSize += chunkP[chunkNb].outputSize;
 		  ratio = (double)cSize/(double)benchedsize*100.;

 		  DISPLAY("%1i-%-14.14s : %9i -> %9i (%5.2f%%),%7.1f MB/s\r", loopNb, infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000.);

 		  // Decompression
 		  { size_t i; for (i=0; i<benchedsize; i++) in_buff[i]=0; }     // zeroing area, for CRC checking

 		  nb_loops = 0;
 		  milliTime = BMK_GetMilliStart();
 		  while(BMK_GetMilliStart() == milliTime);
 		  milliTime = BMK_GetMilliStart();
 		  while(BMK_GetMilliSpan(milliTime) < TIMELOOP)
 		  {
 			for (chunkNb=0; chunkNb<nbChunks; chunkNb++)
 				chunkP[chunkNb].outputSize = compP.decompressionFunction(chunkP[chunkNb].outputBuffer, chunkP[chunkNb].inputBuffer, chunkP[chunkNb].inputSize);
 			nb_loops++;
 		  }
 		  milliTime = BMK_GetMilliSpan(milliTime);

 		  if ((double)milliTime < fastestD*nb_loops) fastestD = (double)milliTime/nb_loops;
 		  DISPLAY("%1i-%-14.14s : %9i -> %9i (%5.2f%%),%7.1f MB/s ,%7.1f MB/s\r", loopNb, infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);

 		  // CRC Checking
 		  crcd = BMK_checksum_MMH3A(in_buff, (unsigned int)benchedsize);
 		  if (crcc!=crcd) { DISPLAY("\n!!! WARNING !!! %14s : Invalid Checksum : %x != %x\n", infilename, (unsigned)crcc, (unsigned)crcd); break; }
 		}

 	    if (crcc==crcd)
 		{
 			if (ratio<100.)
 				DISPLAY("%-16.16s : %9i -> %9i (%5.2f%%),%7.1f MB/s ,%7.1f MB/s\n", infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);
 			else
 				DISPLAY("%-16.16s : %9i -> %9i (%5.1f%%),%7.1f MB/s ,%7.1f MB/s \n", infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);
 		}
 		totals += benchedsize;
 		totalz += cSize;
 		totalc += fastestC;
 		totald += fastestD;
 	  }

 	  free(in_buff);
 	  free(out_buff);
 	  free(chunkP);
   }

   if (nbFiles > 1)
 		printf("%-16.16s :%10llu ->%10llu (%5.2f%%), %6.1f MB/s , %6.1f MB/s\n", "  TOTAL", (long long unsigned int)totals, (long long unsigned int)totalz, (double)totalz/(double)totals*100., (double)totals/totalc/1000., (double)totals/totald/1000.);

   return 0;
 }
	/*
	bench.c - Demo program to benchmark open-source compression algorithm
	Copyright (C) Yann Collet 2012
	GPL v2 License

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License along
	with this program; if not, write to the Free Software Foundation, Inc.,
	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

	You can contact the author at :
	- LZ4 homepage : http://fastcompression.blogspot.com/p/lz4.html
	- LZ4 source repository : http://code.google.com/p/lz4/
	*/

	//**************************************
	// Compiler Options
	//**************************************
	// Disable some Visual warning messages
	#define _CRT_SECURE_NO_WARNINGS
	#define _CRT_SECURE_NO_DEPRECATE // VS2005

	// Unix Large Files support (>4GB)
	#if (defined(__sun__) && (!defined(__LP64__))) // Sun Solaris 32-bits requires specific definitions
	# define _LARGEFILE_SOURCE
	# define FILE_OFFSET_BITS=64
	#elif ! defined(__LP64__) // No point defining Large file for 64 bit
	# define _LARGEFILE64_SOURCE
	#endif

	// S_ISREG & gettimeofday() are not supported by MSVC
	#if defined(_MSC_VER)
	# define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
	# define BMK_LEGACY_TIMER 1
	#endif

	// GCC does not support _rotl outside of Windows
	#if !defined(_WIN32)
	# define _rotl(x,r) ((x << r) \| (x >> (32 - r)))
	#endif


	//**************************************
	// Includes
	//**************************************
	#include <stdlib.h> // malloc
	#include <stdio.h> // fprintf, fopen, ftello64
	#include <sys/types.h> // stat64
	#include <sys/stat.h> // stat64

	// Use ftime() if gettimeofday() is not available on your target
	#if defined(BMK_LEGACY_TIMER)
	# include <sys/timeb.h> // timeb, ftime
	#else
	# include <sys/time.h> // gettimeofday
	#endif

	#include "lz4.h"
	#define COMPRESSOR0 LZ4_compress
	#include "lz4hc.h"
	#define COMPRESSOR1 LZ4_compressHC
	#define DEFAULTCOMPRESSOR LZ4_compress



	//**************************************
	// Basic Types
	//**************************************
	#if defined(_MSC_VER) // Visual Studio does not support 'stdint' natively
	#define BYTE unsigned __int8
	#define U16 unsigned __int16
	#define U32 unsigned __int32
	#define S32 __int32
	#define U64 unsigned __int64
	#else
	#include <stdint.h>
	#define BYTE uint8_t
	#define U16 uint16_t
	#define U32 uint32_t
	#define S32 int32_t
	#define U64 uint64_t
	#endif


	//**************************************
	// Constants
	//**************************************
	#define NBLOOPS 3
	#define TIMELOOP 2000

	#define KNUTH 2654435761U
	#define MAX_MEM (1984<<20)
	#define DEFAULT_CHUNKSIZE (8<<20)


	//**************************************
	// Local structures
	//**************************************
	struct chunkParameters
	{
	U32 id;
	char* inputBuffer;
	char* outputBuffer;
	int inputSize;
	int outputSize;
	};

	struct compressionParameters
	{
	int (compressionFunction)(const char, char*, int);
	int (decompressionFunction)(const char, char*, int);
	};


	//**************************************
	// MACRO
	//**************************************
	#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)



	//**************************************
	// Benchmark Parameters
	//**************************************
	static int chunkSize = DEFAULT_CHUNKSIZE;
	static int nbIterations = NBLOOPS;

	void BMK_SetBlocksize(int bsize)
	{
	chunkSize = bsize;
	DISPLAY("-Using Block Size of %i KB-", chunkSize>>10);
	}

	void BMK_SetNbIterations(int nbLoops)
	{
	nbIterations = nbLoops;
	DISPLAY("- %i iterations-", nbIterations);
	}


	//*********************************************************
	// Private functions
	//*********************************************************

	#if defined(BMK_LEGACY_TIMER)

	static int BMK_GetMilliStart()
	{
	// Based on Legacy ftime()
	// Rolls over every ~ 12.1 days (0x100000/24/60/60)
	// Use GetMilliSpan to correct for rollover
	struct timeb tb;
	int nCount;
	ftime( &tb );
	nCount = (int) (tb.millitm + (tb.time & 0xfffff) * 1000);
	return nCount;
	}

	#else

	static int BMK_GetMilliStart()
	{
	// Based on newer gettimeofday()
	// Use GetMilliSpan to correct for rollover
	struct timeval tv;
	int nCount;
	gettimeofday(&tv, NULL);
	nCount = (int) (tv.tv_usec/1000 + (tv.tv_sec & 0xfffff) * 1000);
	return nCount;
	}

	#endif


	static int BMK_GetMilliSpan( int nTimeStart )
	{
	int nSpan = BMK_GetMilliStart() - nTimeStart;
	if ( nSpan < 0 )
	nSpan += 0x100000 * 1000;
	return nSpan;
	}


	static U32 BMK_checksum_MMH3A (char* buff, U32 length)
	{
	const BYTE* data = (const BYTE*)buff;
	const int nblocks = length >> 2;

	U32 h1 = KNUTH;
	U32 c1 = 0xcc9e2d51;
	U32 c2 = 0x1b873593;

	const U32* blocks = (const U32)(data + nblocks4);
	int i;

	for(i = -nblocks; i; i++)
	{
	U32 k1 = blocks[i];

	k1 *= c1;
	k1 = _rotl(k1,15);
	k1 *= c2;

	h1 ^= k1;
	h1 = _rotl(h1,13);
	h1 = h1*5+0xe6546b64;
	}

	{
	const BYTE* tail = (const BYTE)(data + nblocks4);
	U32 k1 = 0;

	switch(length & 3)
	{
	case 3: k1 ^= tail[2] << 16;
	case 2: k1 ^= tail[1] << 8;
	case 1: k1 ^= tail[0];
	k1 = c1; k1 = _rotl(k1,15); k1 = c2; h1 ^= k1;
	};
	}

	h1 ^= length;
	h1 ^= h1 >> 16;
	h1 *= 0x85ebca6b;
	h1 ^= h1 >> 13;
	h1 *= 0xc2b2ae35;
	h1 ^= h1 >> 16;

	return h1;
	}


	static size_t BMK_findMaxMem(U64 requiredMem)
	{
	size_t step = (64U<<20); // 64 MB
	BYTE* testmem=NULL;

	requiredMem = (((requiredMem >> 25) + 1) << 26);
	if (requiredMem > MAX_MEM) requiredMem = MAX_MEM;

	requiredMem += 2*step;
	while (!testmem)
	{
	requiredMem -= step;
	testmem = malloc ((size_t)requiredMem);
	}

	free (testmem);
	return (size_t) (requiredMem - step);
	}


	static U64 BMK_GetFileSize(char* infilename)
	{
	int r;
	#if defined(_MSC_VER)
	struct _stat64 statbuf;
	r = _stat64(infilename, &statbuf);
	#else
	struct stat statbuf;
	r = stat(infilename, &statbuf);
	#endif
	if (r \|\| !S_ISREG(statbuf.st_mode)) return 0; // No good...
	return (U64)statbuf.st_size;
	}


	//*********************************************************
	// Public function
	//*********************************************************

	int BMK_benchFile(char** fileNamesTable, int nbFiles, int cLevel)
	{
	int fileIdx=0;
	FILE* fileIn;
	char* infilename;
	U64 largefilesize;
	size_t benchedsize;
	int nbChunks;
	int maxCChunkSize;
	size_t readSize;
	char* in_buff;
	char* out_buff; int out_buff_size;
	struct chunkParameters* chunkP;
	U32 crcc, crcd=0;
	struct compressionParameters compP;

	U64 totals = 0;
	U64 totalz = 0;
	double totalc = 0.;
	double totald = 0.;


	// Init
	switch (cLevel)
	{
	#ifdef COMPRESSOR0
	case 0 : compP.compressionFunction = COMPRESSOR0; break;
	#endif
	#ifdef COMPRESSOR1
	case 1 : compP.compressionFunction = COMPRESSOR1; break;
	#endif
	default : compP.compressionFunction = DEFAULTCOMPRESSOR;
	}
	compP.decompressionFunction = LZ4_uncompress;

	// Loop for each file
	while (fileIdx<nbFiles)
	{
	// Check file existence
	infilename = fileNamesTable[fileIdx++];
	fileIn = fopen( infilename, "rb" );
	if (fileIn==NULL)
	{
	DISPLAY( "Pb opening %s\n", infilename);
	return 11;
	}

	// Memory allocation & restrictions
	largefilesize = BMK_GetFileSize(infilename);
	benchedsize = (size_t) BMK_findMaxMem(largefilesize) / 2;
	if ((U64)benchedsize > largefilesize) benchedsize = (size_t)largefilesize;
	if (benchedsize < largefilesize)
	{
	DISPLAY("Not enough memory for '%s' full size; testing %i MB only...\n", infilename, (int)(benchedsize>>20));
	}

	// Alloc
	chunkP = (struct chunkParameters) malloc(((benchedsize / chunkSize)+1) sizeof(struct chunkParameters));
	in_buff = malloc((size_t )benchedsize);
	nbChunks = (int) (benchedsize / chunkSize) + 1;
	maxCChunkSize = LZ4_compressBound(chunkSize);
	out_buff_size = nbChunks * maxCChunkSize;
	out_buff = malloc((size_t )out_buff_size);


	if(!in_buff \|\| !out_buff)
	{
	DISPLAY("\nError: not enough memory!\n");
	free(in_buff);
	free(out_buff);
	fclose(fileIn);
	return 12;
	}

	// Init chunks data
	{
	int i;
	size_t remaining = benchedsize;
	char* in = in_buff;
	char* out = out_buff;
	for (i=0; i<nbChunks; i++)
	{
	chunkP[i].id = i;
	chunkP[i].inputBuffer = in; in += chunkSize;
	if ((int)remaining > chunkSize) { chunkP[i].inputSize = chunkSize; remaining -= chunkSize; } else { chunkP[i].inputSize = (int)remaining; remaining = 0; }
	chunkP[i].outputBuffer = out; out += maxCChunkSize;
	chunkP[i].outputSize = 0;
	}
	}

	// Fill input buffer
	DISPLAY("Loading %s... \r", infilename);
	readSize = fread(in_buff, 1, benchedsize, fileIn);
	fclose(fileIn);

	if(readSize != benchedsize)
	{
	DISPLAY("\nError: problem reading file '%s' !! \n", infilename);
	free(in_buff);
	free(out_buff);
	return 13;
	}

	// Calculating input Checksum
	crcc = BMK_checksum_MMH3A(in_buff, (unsigned int)benchedsize);


	// Bench
	{
	int loopNb, nb_loops, chunkNb;
	size_t cSize=0;
	int milliTime;
	double fastestC = 100000000., fastestD = 100000000.;
	double ratio=0.;

	DISPLAY("\r%79s\r", "");
	for (loopNb = 1; loopNb <= nbIterations; loopNb++)
	{
	// Compression
	DISPLAY("%1i-%-14.14s : %9i ->\r", loopNb, infilename, (int)benchedsize);
	{ size_t i; for (i=0; i<benchedsize; i++) out_buff[i]=(char)i; } // warmimg up memory

	nb_loops = 0;
	milliTime = BMK_GetMilliStart();
	while(BMK_GetMilliStart() == milliTime);
	milliTime = BMK_GetMilliStart();
	while(BMK_GetMilliSpan(milliTime) < TIMELOOP)
	{
	for (chunkNb=0; chunkNb<nbChunks; chunkNb++)
	chunkP[chunkNb].outputSize = compP.compressionFunction(chunkP[chunkNb].inputBuffer, chunkP[chunkNb].outputBuffer, chunkP[chunkNb].inputSize);
	nb_loops++;
	}
	milliTime = BMK_GetMilliSpan(milliTime);

	if ((double)milliTime < fastestC*nb_loops) fastestC = (double)milliTime/nb_loops;
	cSize=0; for (chunkNb=0; chunkNb<nbChunks; chunkNb++) cSize += chunkP[chunkNb].outputSize;
	ratio = (double)cSize/(double)benchedsize*100.;

	DISPLAY("%1i-%-14.14s : %9i -> %9i (%5.2f%%),%7.1f MB/s\r", loopNb, infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000.);

	// Decompression
	{ size_t i; for (i=0; i<benchedsize; i++) in_buff[i]=0; } // zeroing area, for CRC checking

	nb_loops = 0;
	milliTime = BMK_GetMilliStart();
	while(BMK_GetMilliStart() == milliTime);
	milliTime = BMK_GetMilliStart();
	while(BMK_GetMilliSpan(milliTime) < TIMELOOP)
	{
	for (chunkNb=0; chunkNb<nbChunks; chunkNb++)
	chunkP[chunkNb].outputSize = compP.decompressionFunction(chunkP[chunkNb].outputBuffer, chunkP[chunkNb].inputBuffer, chunkP[chunkNb].inputSize);
	nb_loops++;
	}
	milliTime = BMK_GetMilliSpan(milliTime);

	if ((double)milliTime < fastestD*nb_loops) fastestD = (double)milliTime/nb_loops;
	DISPLAY("%1i-%-14.14s : %9i -> %9i (%5.2f%%),%7.1f MB/s ,%7.1f MB/s\r", loopNb, infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);

	// CRC Checking
	crcd = BMK_checksum_MMH3A(in_buff, (unsigned int)benchedsize);
	if (crcc!=crcd) { DISPLAY("\n!!! WARNING !!! %14s : Invalid Checksum : %x != %x\n", infilename, (unsigned)crcc, (unsigned)crcd); break; }
	}

	if (crcc==crcd)
	{
	if (ratio<100.)
	DISPLAY("%-16.16s : %9i -> %9i (%5.2f%%),%7.1f MB/s ,%7.1f MB/s\n", infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);
	else
	DISPLAY("%-16.16s : %9i -> %9i (%5.1f%%),%7.1f MB/s ,%7.1f MB/s \n", infilename, (int)benchedsize, (int)cSize, ratio, (double)benchedsize / fastestC / 1000., (double)benchedsize / fastestD / 1000.);
	}
	totals += benchedsize;
	totalz += cSize;
	totalc += fastestC;
	totald += fastestD;
	}

	free(in_buff);
	free(out_buff);
	free(chunkP);
	}

	if (nbFiles > 1)
	printf("%-16.16s :%10llu ->%10llu (%5.2f%%), %6.1f MB/s , %6.1f MB/s\n", " TOTAL", (long long unsigned int)totals, (long long unsigned int)totalz, (double)totalz/(double)totals*100., (double)totals/totalc/1000., (double)totals/totald/1000.);

	return 0;
	}