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zstd/programs/bench.c

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/*
bench.c - open-source compression benchmark module
Copyright (C) Yann Collet 2012-2016
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 :
- zstd homepage : http://www.zstd.net
- zstd source repository : https://github.com/Cyan4973/zstd
*/
/* **************************************
* Compiler Options
****************************************/
/* Disable some Visual warning messages */
#ifdef _MSC_VER
# define _CRT_SECURE_NO_WARNINGS /* fopen */
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
#endif
/* Unix Large Files support (>4GB) */
#define _FILE_OFFSET_BITS 64
#if (defined(__sun__) && (!defined(__LP64__))) /* Sun Solaris 32-bits requires specific definitions */
# define _LARGEFILE_SOURCE
#elif ! defined(__LP64__) /* No point defining Large file for 64 bit */
# define _LARGEFILE64_SOURCE
#endif
/* *************************************
* Includes
***************************************/
#define _POSIX_C_SOURCE 199309L /* before <time.h> - needed for nanosleep() */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* memset */
#include <stdio.h> /* fprintf, fopen, ftello64 */
#include <sys/types.h> /* stat64 */
#include <sys/stat.h> /* stat64 */
#include <time.h> /* clock_t, nanosleep, clock, CLOCKS_PER_SEC */
/* sleep : posix - windows - others */
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__)))
# include <unistd.h>
# include <sys/resource.h> /* setpriority */
# define BMK_sleep(s) sleep(s)
# define mili_sleep(mili) { struct timespec t; t.tv_sec=0; t.tv_nsec=mili*1000000ULL; nanosleep(&t, NULL); }
# define SET_HIGH_PRIORITY setpriority(PRIO_PROCESS, 0, -20)
#elif defined(_WIN32)
# include <windows.h>
# define BMK_sleep(s) Sleep(1000*s)
# define mili_sleep(mili) Sleep(mili)
# define SET_HIGH_PRIORITY SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS)
#else
# define BMK_sleep(s) /* disabled */
# define mili_sleep(mili) /* disabled */
# define SET_HIGH_PRIORITY /* disabled */
#endif
#if !defined(_WIN32) && (defined(__unix__) || defined(__unix) || (defined(__APPLE__) && defined(__MACH__)))
typedef clock_t BMK_time_t;
# define BMK_initTimer(ticksPerSecond) ticksPerSecond=0
# define BMK_getTime(x) x = clock()
# define BMK_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd) (1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC)
# define BMK_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) (1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC)
#elif defined(_WIN32)
typedef LARGE_INTEGER BMK_time_t;
# define BMK_initTimer(x) if (!QueryPerformanceFrequency(&x)) { fprintf(stderr, "ERROR: QueryPerformance not present\n"); }
# define BMK_getTime(x) QueryPerformanceCounter(&x)
# define BMK_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd) (1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart)
# define BMK_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) (1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart)
#else
typedef int BMK_time_t;
# define BMK_initTimer(ticksPerSecond) ticksPerSecond=0
# define BMK_getTimeMicro(clockStart) clockStart=1
# define BMK_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd) (TIMELOOP_S*1000000ULL+clockEnd-clockStart)
# define BMK_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) (TIMELOOP_S*1000000000ULL+clockEnd-clockStart)
#endif
#include "mem.h"
#include "zstd_static.h"
#include "zstd_internal.h" /* ZSTD_compressBegin_targetSrcSize */
#include "datagen.h" /* RDG_genBuffer */
#include "xxhash.h"
/* *************************************
* Compiler specifics
***************************************/
#if !defined(S_ISREG)
# define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#endif
#if defined(_MSC_VER)
# define snprintf sprintf_s
#elif defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L))
/* part of <stdio.h> */
#else
extern int snprintf (char* s, size_t maxlen, const char* format, ...); /* not declared in <stdio.h> when C version < c99 */
#endif
/* *************************************
* Constants
***************************************/
#ifndef ZSTD_VERSION
# define ZSTD_VERSION ""
#endif
#define NBLOOPS 3
#define TIMELOOP_S 1
#define ACTIVEPERIOD_S 70
#define COOLPERIOD_S 10
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
static const size_t maxMemory = (sizeof(size_t)==4) ? (2 GB - 64 MB) : (size_t)(1ULL << ((sizeof(size_t)*8)-31));
static U32 g_compressibilityDefault = 50;
/* *************************************
* console display
***************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
#define DISPLAYLEVEL(l, ...) if (g_displayLevel>=l) { DISPLAY(__VA_ARGS__); }
static U32 g_displayLevel = 2; /* 0 : no display; 1: errors; 2 : + result + interaction + warnings; 3 : + progression; 4 : + information */
/* *************************************
* Exceptions
***************************************/
#ifndef DEBUG
# define DEBUG 0
#endif
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("Error defined at %s, line %i : \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, "\n"); \
exit(error); \
}
/* *************************************
* Benchmark Parameters
***************************************/
static U32 g_nbIterations = NBLOOPS;
static size_t g_blockSize = 0;
int g_additionalParam = 0;
void BMK_setNotificationLevel(unsigned level) { g_displayLevel=level; }
void BMK_setAdditionalParam(int additionalParam) { g_additionalParam=additionalParam; }
void BMK_SetNbIterations(unsigned nbLoops)
{
g_nbIterations = nbLoops;
DISPLAYLEVEL(2, "- %i iterations -\n", g_nbIterations);
}
void BMK_SetBlockSize(size_t blockSize)
{
g_blockSize = blockSize;
DISPLAYLEVEL(2, "using blocks of size %u KB \n", (U32)(blockSize>>10));
}
/* ********************************************************
* Private functions
**********************************************************/
/* returns time span in microseconds */
static U64 BMK_clockSpan( BMK_time_t clockStart, BMK_time_t ticksPerSecond )
{
BMK_time_t clockEnd;
(void)ticksPerSecond;
BMK_getTime(clockEnd);
return BMK_getSpanTimeMicro(ticksPerSecond, clockStart, clockEnd);
}
static U64 BMK_getFileSize(const 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;
}
/* ********************************************************
* Bench functions
**********************************************************/
typedef struct
{
const char* srcPtr;
size_t srcSize;
char* cPtr;
size_t cRoom;
size_t cSize;
char* resPtr;
size_t resSize;
} blockParam_t;
typedef struct
{
double ratio;
size_t cSize;
double cSpeed;
double dSpeed;
} benchResult_t;
#define MIN(a,b) ((a)<(b) ? (a) : (b))
#define MAX(a,b) ((a)>(b) ? (a) : (b))
static int BMK_benchMem(const void* srcBuffer, size_t srcSize,
const char* displayName, int cLevel,
const size_t* fileSizes, U32 nbFiles,
const void* dictBuffer, size_t dictBufferSize, benchResult_t *result)
{
size_t const blockSize = (g_blockSize ? g_blockSize : srcSize) + (!srcSize); /* avoid div by 0 */
U32 const maxNbBlocks = (U32) ((srcSize + (blockSize-1)) / blockSize) + nbFiles;
blockParam_t* const blockTable = (blockParam_t*) malloc(maxNbBlocks * sizeof(blockParam_t));
size_t const maxCompressedSize = ZSTD_compressBound(srcSize) + (maxNbBlocks * 1024); /* add some room for safety */
void* const compressedBuffer = malloc(maxCompressedSize);
void* const resultBuffer = malloc(srcSize);
ZSTD_CCtx* refCtx = ZSTD_createCCtx();
ZSTD_CCtx* ctx = ZSTD_createCCtx();
ZSTD_DCtx* refDCtx = ZSTD_createDCtx();
ZSTD_DCtx* dctx = ZSTD_createDCtx();
U32 nbBlocks;
BMK_time_t ticksPerSecond;
/* checks */
if (!compressedBuffer || !resultBuffer || !blockTable || !refCtx || !ctx || !refDCtx || !dctx)
EXM_THROW(31, "not enough memory");
/* init */
if (strlen(displayName)>17) displayName += strlen(displayName)-17; /* can only display 17 characters */
BMK_initTimer(ticksPerSecond);
/* Init blockTable data */
{ const char* srcPtr = (const char*)srcBuffer;
char* cPtr = (char*)compressedBuffer;
char* resPtr = (char*)resultBuffer;
U32 fileNb;
for (nbBlocks=0, fileNb=0; fileNb<nbFiles; fileNb++) {
size_t remaining = fileSizes[fileNb];
U32 const nbBlocksforThisFile = (U32)((remaining + (blockSize-1)) / blockSize);
U32 const blockEnd = nbBlocks + nbBlocksforThisFile;
for ( ; nbBlocks<blockEnd; nbBlocks++) {
size_t const thisBlockSize = MIN(remaining, blockSize);
blockTable[nbBlocks].srcPtr = srcPtr;
blockTable[nbBlocks].cPtr = cPtr;
blockTable[nbBlocks].resPtr = resPtr;
blockTable[nbBlocks].srcSize = thisBlockSize;
blockTable[nbBlocks].cRoom = ZSTD_compressBound(thisBlockSize);
srcPtr += thisBlockSize;
cPtr += blockTable[nbBlocks].cRoom;
resPtr += thisBlockSize;
remaining -= thisBlockSize;
} } }
/* warmimg up memory */
RDG_genBuffer(compressedBuffer, maxCompressedSize, 0.10, 0.50, 1);
/* Bench */
{ double fastestC = 100000000., fastestD = 100000000.;
U64 const crcOrig = XXH64(srcBuffer, srcSize, 0);
U64 crcCheck = 0;
BMK_time_t coolTime;
U32 testNb;
size_t cSize = 0;
double ratio = 0.;
BMK_getTime(coolTime);
DISPLAYLEVEL(2, "\r%79s\r", "");
for (testNb = 1; testNb <= (g_nbIterations + !g_nbIterations); testNb++) {
BMK_time_t clockStart, clockEnd;
U64 clockLoop = g_nbIterations ? TIMELOOP_S*1000000ULL : 10;
/* overheat protection */
if (BMK_clockSpan(coolTime, ticksPerSecond) > ACTIVEPERIOD_S*1000000ULL) {
DISPLAY("\rcooling down ... \r");
BMK_sleep(COOLPERIOD_S);
BMK_getTime(coolTime);
}
/* Compression */
DISPLAYLEVEL(2, "%2i-%-17.17s :%10u ->\r", testNb, displayName, (U32)srcSize);
memset(compressedBuffer, 0xE5, maxCompressedSize); /* warm up and erase result buffer */
mili_sleep(1); /* give processor time to other processes */
BMK_getTime(clockStart);
do { BMK_getTime(clockEnd); }
while (BMK_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) == 0);
BMK_getTime(clockStart);
{ U32 nbLoops;
for (nbLoops = 0 ; BMK_clockSpan(clockStart, ticksPerSecond) < clockLoop ; nbLoops++) {
U32 blockNb;
ZSTD_compressBegin_targetSrcSize(refCtx, dictBuffer, dictBufferSize, blockSize, cLevel);
// ZSTD_compressBegin_usingDict(refCtx, dictBuffer, dictBufferSize, cLevel);
for (blockNb=0; blockNb<nbBlocks; blockNb++) {
size_t const rSize = ZSTD_compress_usingPreparedCCtx(ctx, refCtx,
blockTable[blockNb].cPtr, blockTable[blockNb].cRoom,
blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize);
if (ZSTD_isError(rSize)) EXM_THROW(1, "ZSTD_compress_usingPreparedCCtx() failed : %s", ZSTD_getErrorName(rSize));
blockTable[blockNb].cSize = rSize;
} }
{ U64 const clockSpan = BMK_clockSpan(clockStart, ticksPerSecond);
if ((double)clockSpan < fastestC*nbLoops) fastestC = (double)clockSpan / nbLoops;
} }
cSize = 0;
{ U32 blockNb; for (blockNb=0; blockNb<nbBlocks; blockNb++) cSize += blockTable[blockNb].cSize; }
ratio = (double)srcSize / (double)cSize;
DISPLAYLEVEL(2, "%2i-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s\r",
testNb, displayName, (U32)srcSize, (U32)cSize, ratio,
(double)srcSize / fastestC );
(void)fastestD; (void)crcOrig; /* unused when decompression disabled */
#if 1
/* Decompression */
memset(resultBuffer, 0xD6, srcSize); /* warm result buffer */
mili_sleep(1); /* give processor time to other processes */
BMK_getTime(clockStart);
do { BMK_getTime(clockEnd); }
while (BMK_getSpanTimeNano(ticksPerSecond, clockStart, clockEnd) == 0);
BMK_getTime(clockStart);
{ U32 nbLoops;
for (nbLoops = 0 ; BMK_clockSpan(clockStart, ticksPerSecond) < clockLoop ; nbLoops++) {
U32 blockNb;
ZSTD_decompressBegin_usingDict(refDCtx, dictBuffer, dictBufferSize);
for (blockNb=0; blockNb<nbBlocks; blockNb++) {
size_t const regenSize = ZSTD_decompress_usingPreparedDCtx(dctx, refDCtx,
blockTable[blockNb].resPtr, blockTable[blockNb].srcSize,
blockTable[blockNb].cPtr, blockTable[blockNb].cSize);
if (ZSTD_isError(regenSize)) {
DISPLAY("ZSTD_decompress_usingPreparedDCtx() failed on block %u : %s \n",
blockNb, ZSTD_getErrorName(regenSize));
clockLoop = 0; /* force immediate test end */
break;
}
blockTable[blockNb].resSize = regenSize;
} }
{ U64 const clockSpan = BMK_clockSpan(clockStart, ticksPerSecond);
if ((double)clockSpan < fastestD*nbLoops) fastestD = (double)clockSpan / nbLoops;
} }
DISPLAYLEVEL(2, "%2i-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s ,%6.1f MB/s\r",
testNb, displayName, (U32)srcSize, (U32)cSize, ratio,
(double)srcSize / fastestC,
(double)srcSize / fastestD );
/* CRC Checking */
{ crcCheck = XXH64(resultBuffer, srcSize, 0);
if (crcOrig!=crcCheck) {
size_t u;
DISPLAY("!!! WARNING !!! %14s : Invalid Checksum : %x != %x \n", displayName, (unsigned)crcOrig, (unsigned)crcCheck);
for (u=0; u<srcSize; u++) {
if (((const BYTE*)srcBuffer)[u] != ((const BYTE*)resultBuffer)[u]) {
U32 segNb, bNb, pos;
size_t bacc = 0;
DISPLAY("Decoding error at pos %u ", (U32)u);
for (segNb = 0; segNb < nbBlocks; segNb++) {
if (bacc + blockTable[segNb].srcSize > u) break;
bacc += blockTable[segNb].srcSize;
}
pos = (U32)(u - bacc);
bNb = pos / (128 KB);
DISPLAY("(block %u, sub %u, pos %u) \n", segNb, bNb, pos);
break;
}
if (u==srcSize-1) { /* should never happen */
DISPLAY("no difference detected\n");
} }
break;
} } /* CRC Checking */
#endif
} /* for (testNb = 1; testNb <= (g_nbIterations + !g_nbIterations); testNb++) */
if (crcOrig == crcCheck) {
result->ratio = ratio;
result->cSize = cSize;
result->cSpeed = (double)srcSize / fastestC;
result->dSpeed = (double)srcSize / fastestD;
}
DISPLAYLEVEL(2, "%2i#\n", cLevel);
} /* Bench */
/* clean up */
free(compressedBuffer);
free(resultBuffer);
ZSTD_freeCCtx(refCtx);
ZSTD_freeCCtx(ctx);
ZSTD_freeDCtx(refDCtx);
ZSTD_freeDCtx(dctx);
return 0;
}
static size_t BMK_findMaxMem(U64 requiredMem)
{
size_t const step = 64 MB;
BYTE* testmem = NULL;
requiredMem = (((requiredMem >> 26) + 1) << 26);
requiredMem += step;
if (requiredMem > maxMemory) requiredMem = maxMemory;
do {
testmem = (BYTE*)malloc((size_t)requiredMem);
requiredMem -= step;
} while (!testmem);
free(testmem);
return (size_t)(requiredMem);
}
static void BMK_benchCLevel(void* srcBuffer, size_t benchedSize,
const char* displayName, int cLevel, int cLevelLast,
const size_t* fileSizes, unsigned nbFiles,
const void* dictBuffer, size_t dictBufferSize)
{
benchResult_t result, total;
int l;
SET_HIGH_PRIORITY;
const char* pch = strrchr(displayName, '\\'); /* Windows */
if (!pch) pch = strrchr(displayName, '/'); /* Linux */
if (pch) displayName = pch+1;
memset(&result, 0, sizeof(result));
memset(&total, 0, sizeof(total));
if (g_displayLevel == 1 && !g_additionalParam)
DISPLAY("bench %s: input %u bytes, %i iterations, %u KB blocks\n", ZSTD_VERSION, (U32)benchedSize, g_nbIterations, (U32)(g_blockSize>>10));
if (cLevelLast < cLevel) cLevelLast = cLevel;
for (l=cLevel; l <= cLevelLast; l++) {
BMK_benchMem(srcBuffer, benchedSize,
displayName, l,
fileSizes, nbFiles,
dictBuffer, dictBufferSize, &result);
if (g_displayLevel == 1) {
if (g_additionalParam)
DISPLAY("%-3i%11i (%5.3f) %6.1f MB/s %6.1f MB/s %s (param=%d)\n", -l, (int)result.cSize, result.ratio, result.cSpeed, result.dSpeed, displayName, g_additionalParam);
else
DISPLAY("%-3i%11i (%5.3f) %6.1f MB/s %6.1f MB/s %s\n", -l, (int)result.cSize, result.ratio, result.cSpeed, result.dSpeed, displayName);
total.cSize += result.cSize;
total.cSpeed += result.cSpeed;
total.dSpeed += result.dSpeed;
total.ratio += result.ratio;
} }
if (g_displayLevel == 1 && cLevelLast > cLevel) {
total.cSize /= 1+cLevelLast-cLevel;
total.cSpeed /= 1+cLevelLast-cLevel;
total.dSpeed /= 1+cLevelLast-cLevel;
total.ratio /= 1+cLevelLast-cLevel;
DISPLAY("avg%11i (%5.3f) %6.1f MB/s %6.1f MB/s %s\n", (int)total.cSize, total.ratio, total.cSpeed, total.dSpeed, displayName);
}
}
static U64 BMK_getTotalFileSize(const char** fileNamesTable, unsigned nbFiles)
{
U64 total = 0;
unsigned n;
for (n=0; n<nbFiles; n++)
total += BMK_getFileSize(fileNamesTable[n]);
return total;
}
/*! BMK_loadFiles() :
Loads `buffer` with content of files listed within `fileNamesTable`.
At most, fills `buffer` entirely */
static void BMK_loadFiles(void* buffer, size_t bufferSize,
size_t* fileSizes,
const char** fileNamesTable, unsigned nbFiles)
{
size_t pos = 0;
unsigned n;
for (n=0; n<nbFiles; n++) {
U64 fileSize = BMK_getFileSize(fileNamesTable[n]);
FILE* const f = fopen(fileNamesTable[n], "rb");
if (f==NULL) EXM_THROW(10, "impossible to open file %s", fileNamesTable[n]);
DISPLAYLEVEL(2, "Loading %s... \r", fileNamesTable[n]);
if (fileSize > bufferSize-pos) fileSize = bufferSize-pos, nbFiles=n; /* buffer too small - stop after this file */
{ size_t const readSize = fread(((char*)buffer)+pos, 1, (size_t)fileSize, f);
if (readSize != (size_t)fileSize) EXM_THROW(11, "could not read %s", fileNamesTable[n]);
pos += readSize; }
fileSizes[n] = (size_t)fileSize;
fclose(f);
}
}
static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles,
const char* dictFileName, int cLevel, int cLevelLast)
{
void* srcBuffer;
size_t benchedSize;
void* dictBuffer = NULL;
size_t dictBufferSize = 0;
size_t* fileSizes = (size_t*)malloc(nbFiles * sizeof(size_t));
U64 totalSizeToLoad = BMK_getTotalFileSize(fileNamesTable, nbFiles);
char mfName[20] = {0};
const char* displayName = NULL;
if (!fileSizes) EXM_THROW(12, "not enough memory for fileSizes");
/* Load dictionary */
if (dictFileName != NULL) {
U64 dictFileSize = BMK_getFileSize(dictFileName);
if (dictFileSize > 64 MB) EXM_THROW(10, "dictionary file %s too large", dictFileName);
dictBufferSize = (size_t)dictFileSize;
dictBuffer = malloc(dictBufferSize);
if (dictBuffer==NULL) EXM_THROW(11, "not enough memory for dictionary (%u bytes)", (U32)dictBufferSize);
BMK_loadFiles(dictBuffer, dictBufferSize, fileSizes, &dictFileName, 1);
}
/* Memory allocation & restrictions */
benchedSize = BMK_findMaxMem(totalSizeToLoad * 3) / 3;
if ((U64)benchedSize > totalSizeToLoad) benchedSize = (size_t)totalSizeToLoad;
if (benchedSize < totalSizeToLoad)
DISPLAY("Not enough memory; testing %u MB only...\n", (U32)(benchedSize >> 20));
srcBuffer = malloc(benchedSize);
if (!srcBuffer) EXM_THROW(12, "not enough memory");
/* Load input buffer */
BMK_loadFiles(srcBuffer, benchedSize, fileSizes, fileNamesTable, nbFiles);
/* Bench */
snprintf (mfName, sizeof(mfName), " %u files", nbFiles);
if (nbFiles > 1) displayName = mfName;
else displayName = fileNamesTable[0];
BMK_benchCLevel(srcBuffer, benchedSize,
displayName, cLevel, cLevelLast,
fileSizes, nbFiles,
dictBuffer, dictBufferSize);
/* clean up */
free(srcBuffer);
free(dictBuffer);
free(fileSizes);
}
static void BMK_syntheticTest(int cLevel, int cLevelLast, double compressibility)
{
char name[20] = {0};
size_t benchedSize = 10000000;
void* srcBuffer = malloc(benchedSize);
/* Memory allocation */
if (!srcBuffer) EXM_THROW(21, "not enough memory");
/* Fill input buffer */
RDG_genBuffer(srcBuffer, benchedSize, compressibility, 0.0, 0);
/* Bench */
snprintf (name, sizeof(name), "Synthetic %2u%%", (unsigned)(compressibility*100));
BMK_benchCLevel(srcBuffer, benchedSize, name, cLevel, cLevelLast, &benchedSize, 1, NULL, 0);
/* clean up */
free(srcBuffer);
}
int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles,
const char* dictFileName, int cLevel, int cLevelLast)
{
double const compressibility = (double)g_compressibilityDefault / 100;
if (nbFiles == 0)
BMK_syntheticTest(cLevel, cLevelLast, compressibility);
else
BMK_benchFileTable(fileNamesTable, nbFiles, dictFileName, cLevel, cLevelLast);
return 0;
}
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