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zstd/programs/bench.c
Yann Collet c2007388a5 fixed bench.c : optional advanced parameters applied 
before creating cdict
2017-04-04 15:35:06 -07:00

596 lines
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/**
* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
/* **************************************
* Tuning parameters
****************************************/
#ifndef BMK_TIMETEST_DEFAULT_S /* default minimum time per test */
#define BMK_TIMETEST_DEFAULT_S 3
#endif
/* **************************************
* Compiler Warnings
****************************************/
#ifdef _MSC_VER
# pragma warning(disable : 4127) /* disable: C4127: conditional expression is constant */
#endif
/* *************************************
* Includes
***************************************/
#include "platform.h" /* Large Files support */
#include "util.h" /* UTIL_getFileSize, UTIL_sleep */
#include <stdlib.h> /* malloc, free */
#include <string.h> /* memset */
#include <stdio.h> /* fprintf, fopen */
#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */
#include "mem.h"
#define ZSTD_STATIC_LINKING_ONLY
#include "zstd.h"
#include "datagen.h" /* RDG_genBuffer */
#include "xxhash.h"
#include "zstdmt_compress.h"
/* *************************************
* Constants
***************************************/
#ifndef ZSTD_GIT_COMMIT
# define ZSTD_GIT_COMMIT_STRING ""
#else
# define ZSTD_GIT_COMMIT_STRING ZSTD_EXPAND_AND_QUOTE(ZSTD_GIT_COMMIT)
#endif
#define TIMELOOP_MICROSEC 1*1000000ULL /* 1 second */
#define ACTIVEPERIOD_MICROSEC 70*1000000ULL /* 70 seconds */
#define COOLPERIOD_SEC 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 int g_displayLevel = 2; /* 0 : no display; 1: errors; 2 : + result + interaction + warnings; 3 : + progression; 4 : + information */
#define DISPLAYUPDATE(l, ...) if (g_displayLevel>=l) { \
if ((clock() - g_time > refreshRate) || (g_displayLevel>=4)) \
{ g_time = clock(); DISPLAY(__VA_ARGS__); \
if (g_displayLevel>=4) fflush(stderr); } }
static const clock_t refreshRate = CLOCKS_PER_SEC * 15 / 100;
static clock_t g_time = 0;
/* *************************************
* Exceptions
***************************************/
#ifndef DEBUG
# define DEBUG 0
#endif
#define DEBUGOUTPUT(...) if (DEBUG) DISPLAY(__VA_ARGS__);
#define EXM_THROW(error, ...) \
{ \
DEBUGOUTPUT("%s: %i: \n", __FILE__, __LINE__); \
DISPLAYLEVEL(1, "Error %i : ", error); \
DISPLAYLEVEL(1, __VA_ARGS__); \
DISPLAYLEVEL(1, " \n"); \
exit(error); \
}
/* *************************************
* Benchmark Parameters
***************************************/
static int g_additionalParam = 0;
static U32 g_decodeOnly = 0;
void BMK_setNotificationLevel(unsigned level) { g_displayLevel=level; }
void BMK_setAdditionalParam(int additionalParam) { g_additionalParam=additionalParam; }
static U32 g_nbSeconds = BMK_TIMETEST_DEFAULT_S;
void BMK_setNbSeconds(unsigned nbSeconds)
{
g_nbSeconds = nbSeconds;
DISPLAYLEVEL(3, "- test >= %u seconds per compression / decompression - \n", g_nbSeconds);
}
static size_t g_blockSize = 0;
void BMK_setBlockSize(size_t blockSize)
{
g_blockSize = blockSize;
if (g_blockSize) DISPLAYLEVEL(2, "using blocks of size %u KB \n", (U32)(blockSize>>10));
}
void BMK_setDecodeOnlyMode(unsigned decodeFlag) { g_decodeOnly = (decodeFlag>0); }
static U32 g_nbThreads = 1;
void BMK_setNbThreads(unsigned nbThreads) {
#ifndef ZSTD_MULTITHREAD
if (nbThreads > 1) DISPLAYLEVEL(2, "Note : multi-threading is disabled \n");
#endif
g_nbThreads = nbThreads;
}
/* ********************************************************
* Bench functions
**********************************************************/
typedef struct {
const void* srcPtr;
size_t srcSize;
void* cPtr;
size_t cRoom;
size_t cSize;
void* resPtr;
size_t resSize;
} blockParam_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,
const ZSTD_compressionParameters* comprParams)
{
size_t const blockSize = ((g_blockSize>=32 && !g_decodeOnly) ? g_blockSize : srcSize) + (!srcSize) /* avoid div by 0 */ ;
size_t const avgSize = MIN(blockSize, (srcSize / nbFiles));
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* resultBuffer = malloc(srcSize);
ZSTDMT_CCtx* const mtctx = ZSTDMT_createCCtx(g_nbThreads);
ZSTD_CCtx* const ctx = ZSTD_createCCtx();
ZSTD_DCtx* const dctx = ZSTD_createDCtx();
size_t const loadedCompressedSize = srcSize;
size_t cSize = 0;
double ratio = 0.;
U32 nbBlocks;
UTIL_freq_t ticksPerSecond;
/* checks */
if (!compressedBuffer || !resultBuffer || !blockTable || !ctx || !dctx)
EXM_THROW(31, "allocation error : not enough memory");
/* init */
if (strlen(displayName)>17) displayName += strlen(displayName)-17; /* display last 17 characters */
UTIL_initTimer(&ticksPerSecond);
if (g_decodeOnly) { /* benchmark only decompression : source must be already compressed */
const char* srcPtr = (const char*)srcBuffer;
U64 totalDSize64 = 0;
U32 fileNb;
for (fileNb=0; fileNb<nbFiles; fileNb++) {
U64 const fSize64 = ZSTD_findDecompressedSize(srcPtr, fileSizes[fileNb]);
if (fSize64==0) EXM_THROW(32, "Impossible to determine original size ");
totalDSize64 += fSize64;
srcPtr += fileSizes[fileNb];
}
{ size_t const decodedSize = (size_t)totalDSize64;
if (totalDSize64 > decodedSize) EXM_THROW(32, "original size is too large"); /* size_t overflow */
free(resultBuffer);
resultBuffer = malloc(decodedSize);
if (!resultBuffer) EXM_THROW(33, "not enough memory");
cSize = srcSize;
srcSize = decodedSize;
ratio = (double)srcSize / (double)cSize;
} }
/* 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 = g_decodeOnly ? 1 : (U32)((remaining + (blockSize-1)) / blockSize);
U32 const blockEnd = nbBlocks + nbBlocksforThisFile;
for ( ; nbBlocks<blockEnd; nbBlocks++) {
size_t const thisBlockSize = MIN(remaining, blockSize);
blockTable[nbBlocks].srcPtr = (const void*)srcPtr;
blockTable[nbBlocks].srcSize = thisBlockSize;
blockTable[nbBlocks].cPtr = (void*)cPtr;
blockTable[nbBlocks].cRoom = g_decodeOnly ? thisBlockSize : ZSTD_compressBound(thisBlockSize);
blockTable[nbBlocks].cSize = blockTable[nbBlocks].cRoom;
blockTable[nbBlocks].resPtr = (void*)resPtr;
blockTable[nbBlocks].resSize = g_decodeOnly ? (size_t) ZSTD_findDecompressedSize(srcPtr, thisBlockSize) : thisBlockSize;
srcPtr += thisBlockSize;
cPtr += blockTable[nbBlocks].cRoom;
resPtr += thisBlockSize;
remaining -= thisBlockSize;
} } }
/* warmimg up memory */
RDG_genBuffer(compressedBuffer, maxCompressedSize, 0.10, 0.50, 1);
/* Bench */
{ U64 fastestC = (U64)(-1LL), fastestD = (U64)(-1LL);
U64 const crcOrig = g_decodeOnly ? 0 : XXH64(srcBuffer, srcSize, 0);
UTIL_time_t coolTime;
U64 const maxTime = (g_nbSeconds * TIMELOOP_MICROSEC) + 1;
U64 totalCTime=0, totalDTime=0;
U32 cCompleted=g_decodeOnly, dCompleted=0;
# define NB_MARKS 4
const char* const marks[NB_MARKS] = { " |", " /", " =", "\\" };
U32 markNb = 0;
UTIL_getTime(&coolTime);
DISPLAYLEVEL(2, "\r%79s\r", "");
while (!cCompleted || !dCompleted) {
/* overheat protection */
if (UTIL_clockSpanMicro(coolTime, ticksPerSecond) > ACTIVEPERIOD_MICROSEC) {
DISPLAYLEVEL(2, "\rcooling down ... \r");
UTIL_sleep(COOLPERIOD_SEC);
UTIL_getTime(&coolTime);
}
if (!g_decodeOnly) {
UTIL_time_t clockStart;
/* Compression */
DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->\r", marks[markNb], displayName, (U32)srcSize);
if (!cCompleted) memset(compressedBuffer, 0xE5, maxCompressedSize); /* warm up and erase result buffer */
UTIL_sleepMilli(1); /* give processor time to other processes */
UTIL_waitForNextTick(ticksPerSecond);
UTIL_getTime(&clockStart);
if (!cCompleted) { /* still some time to do compression tests */
ZSTD_customMem const cmem = { NULL, NULL, NULL };
U64 const clockLoop = g_nbSeconds ? TIMELOOP_MICROSEC : 1;
U32 nbLoops = 0;
ZSTD_parameters zparams = ZSTD_getParams(cLevel, avgSize, dictBufferSize);
ZSTD_CDict* cdict;
if (comprParams->windowLog) zparams.cParams.windowLog = comprParams->windowLog;
if (comprParams->chainLog) zparams.cParams.chainLog = comprParams->chainLog;
if (comprParams->hashLog) zparams.cParams.hashLog = comprParams->hashLog;
if (comprParams->searchLog) zparams.cParams.searchLog = comprParams->searchLog;
if (comprParams->searchLength) zparams.cParams.searchLength = comprParams->searchLength;
if (comprParams->targetLength) zparams.cParams.targetLength = comprParams->targetLength;
if (comprParams->strategy) zparams.cParams.strategy = (ZSTD_strategy)(comprParams->strategy - 1);
cdict = ZSTD_createCDict_advanced(dictBuffer, dictBufferSize, 1, zparams, cmem);
if (cdict==NULL) EXM_THROW(1, "ZSTD_createCDict_advanced() allocation failure");
do {
U32 blockNb;
size_t rSize;
for (blockNb=0; blockNb<nbBlocks; blockNb++) {
if (dictBufferSize) {
rSize = ZSTD_compress_usingCDict(ctx,
blockTable[blockNb].cPtr, blockTable[blockNb].cRoom,
blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize,
cdict);
} else {
#ifdef ZSTD_MULTITHREAD /* note : limitation : MT single-pass does not support compression with dictionary */
rSize = ZSTDMT_compressCCtx(mtctx,
blockTable[blockNb].cPtr, blockTable[blockNb].cRoom,
blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize,
cLevel);
#else
rSize = ZSTD_compress_advanced (ctx,
blockTable[blockNb].cPtr, blockTable[blockNb].cRoom,
blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize, NULL, 0, zparams);
#endif
}
if (ZSTD_isError(rSize)) EXM_THROW(1, "ZSTD_compress_usingCDict() failed : %s", ZSTD_getErrorName(rSize));
blockTable[blockNb].cSize = rSize;
}
nbLoops++;
} while (UTIL_clockSpanMicro(clockStart, ticksPerSecond) < clockLoop);
ZSTD_freeCDict(cdict);
{ U64 const clockSpanMicro = UTIL_clockSpanMicro(clockStart, ticksPerSecond);
if (clockSpanMicro < fastestC*nbLoops) fastestC = clockSpanMicro / nbLoops;
totalCTime += clockSpanMicro;
cCompleted = (totalCTime >= maxTime);
} }
cSize = 0;
{ U32 blockNb; for (blockNb=0; blockNb<nbBlocks; blockNb++) cSize += blockTable[blockNb].cSize; }
ratio = (double)srcSize / (double)cSize;
markNb = (markNb+1) % NB_MARKS;
DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s\r",
marks[markNb], displayName, (U32)srcSize, (U32)cSize, ratio,
(double)srcSize / fastestC );
} else { /* g_decodeOnly */
memcpy(compressedBuffer, srcBuffer, loadedCompressedSize);
}
#if 0 /* disable decompression test */
dCompleted=1;
(void)totalDTime; (void)fastestD; (void)crcOrig; /* unused when decompression disabled */
#else
/* Decompression */
if (!dCompleted) memset(resultBuffer, 0xD6, srcSize); /* warm result buffer */
UTIL_sleepMilli(1); /* give processor time to other processes */
UTIL_waitForNextTick(ticksPerSecond);
if (!dCompleted) {
U64 clockLoop = g_nbSeconds ? TIMELOOP_MICROSEC : 1;
U32 nbLoops = 0;
UTIL_time_t clockStart;
ZSTD_DDict* const ddict = ZSTD_createDDict(dictBuffer, dictBufferSize);
if (!ddict) EXM_THROW(2, "ZSTD_createDDict() allocation failure");
UTIL_getTime(&clockStart);
do {
U32 blockNb;
for (blockNb=0; blockNb<nbBlocks; blockNb++) {
size_t const regenSize = ZSTD_decompress_usingDDict(dctx,
blockTable[blockNb].resPtr, blockTable[blockNb].resSize,
blockTable[blockNb].cPtr, blockTable[blockNb].cSize,
ddict);
if (ZSTD_isError(regenSize)) {
DISPLAY("ZSTD_decompress_usingDDict() failed on block %u of size %u : %s \n",
blockNb, (U32)blockTable[blockNb].cSize, ZSTD_getErrorName(regenSize));
clockLoop = 0; /* force immediate test end */
break;
}
blockTable[blockNb].resSize = regenSize;
}
nbLoops++;
} while (UTIL_clockSpanMicro(clockStart, ticksPerSecond) < clockLoop);
ZSTD_freeDDict(ddict);
{ U64 const clockSpanMicro = UTIL_clockSpanMicro(clockStart, ticksPerSecond);
if (clockSpanMicro < fastestD*nbLoops) fastestD = clockSpanMicro / nbLoops;
totalDTime += clockSpanMicro;
dCompleted = (totalDTime >= maxTime);
} }
markNb = (markNb+1) % NB_MARKS;
DISPLAYLEVEL(2, "%2s-%-17.17s :%10u ->%10u (%5.3f),%6.1f MB/s ,%6.1f MB/s\r",
marks[markNb], displayName, (U32)srcSize, (U32)cSize, ratio,
(double)srcSize / fastestC,
(double)srcSize / fastestD );
/* CRC Checking */
{ U64 const crcCheck = XXH64(resultBuffer, srcSize, 0);
if (!g_decodeOnly && (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);
if (u>5) {
int n;
for (n=-5; n<0; n++) DISPLAY("%02X ", ((const BYTE*)srcBuffer)[u+n]);
DISPLAY(" :%02X: ", ((const BYTE*)srcBuffer)[u]);
for (n=1; n<3; n++) DISPLAY("%02X ", ((const BYTE*)srcBuffer)[u+n]);
DISPLAY(" \n");
for (n=-5; n<0; n++) DISPLAY("%02X ", ((const BYTE*)resultBuffer)[u+n]);
DISPLAY(" :%02X: ", ((const BYTE*)resultBuffer)[u]);
for (n=1; n<3; n++) DISPLAY("%02X ", ((const BYTE*)resultBuffer)[u+n]);
DISPLAY(" \n");
}
break;
}
if (u==srcSize-1) { /* should never happen */
DISPLAY("no difference detected\n");
} }
break;
} } /* CRC Checking */
#endif
} /* for (testNb = 1; testNb <= (g_nbSeconds + !g_nbSeconds); testNb++) */
if (g_displayLevel == 1) {
double cSpeed = (double)srcSize / fastestC;
double dSpeed = (double)srcSize / fastestD;
if (g_additionalParam)
DISPLAY("-%-3i%11i (%5.3f) %6.2f MB/s %6.1f MB/s %s (param=%d)\n", cLevel, (int)cSize, ratio, cSpeed, dSpeed, displayName, g_additionalParam);
else
DISPLAY("-%-3i%11i (%5.3f) %6.2f MB/s %6.1f MB/s %s\n", cLevel, (int)cSize, ratio, cSpeed, dSpeed, displayName);
}
DISPLAYLEVEL(2, "%2i#\n", cLevel);
} /* Bench */
/* clean up */
free(blockTable);
free(compressedBuffer);
free(resultBuffer);
ZSTDMT_freeCCtx(mtctx);
ZSTD_freeCCtx(ctx);
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,
ZSTD_compressionParameters *compressionParams, int setRealTimePrio)
{
int l;
const char* pch = strrchr(displayName, '\\'); /* Windows */
if (!pch) pch = strrchr(displayName, '/'); /* Linux */
if (pch) displayName = pch+1;
if (setRealTimePrio) {
DISPLAYLEVEL(2, "Note : switching to a real-time priority \n");
SET_REALTIME_PRIORITY;
}
if (g_displayLevel == 1 && !g_additionalParam)
DISPLAY("bench %s %s: input %u bytes, %u seconds, %u KB blocks\n", ZSTD_VERSION_STRING, ZSTD_GIT_COMMIT_STRING, (U32)benchedSize, g_nbSeconds, (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, compressionParams);
}
}
/*! 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, totalSize = 0;
unsigned n;
for (n=0; n<nbFiles; n++) {
FILE* f;
U64 fileSize = UTIL_getFileSize(fileNamesTable[n]);
if (UTIL_isDirectory(fileNamesTable[n])) {
DISPLAYLEVEL(2, "Ignoring %s directory... \n", fileNamesTable[n]);
fileSizes[n] = 0;
continue;
}
f = fopen(fileNamesTable[n], "rb");
if (f==NULL) EXM_THROW(10, "impossible to open file %s", fileNamesTable[n]);
DISPLAYUPDATE(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;
totalSize += (size_t)fileSize;
fclose(f);
}
if (totalSize == 0) EXM_THROW(12, "no data to bench");
}
static void BMK_benchFileTable(const char** fileNamesTable, unsigned nbFiles, const char* dictFileName, int cLevel,
int cLevelLast, ZSTD_compressionParameters *compressionParams, int setRealTimePrio)
{
void* srcBuffer;
size_t benchedSize;
void* dictBuffer = NULL;
size_t dictBufferSize = 0;
size_t* fileSizes = (size_t*)malloc(nbFiles * sizeof(size_t));
U64 const totalSizeToLoad = UTIL_getTotalFileSize(fileNamesTable, nbFiles);
char mfName[20] = {0};
if (!fileSizes) EXM_THROW(12, "not enough memory for fileSizes");
/* Load dictionary */
if (dictFileName != NULL) {
U64 dictFileSize = UTIL_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);
{ const char* displayName = (nbFiles > 1) ? mfName : fileNamesTable[0];
BMK_benchCLevel(srcBuffer, benchedSize,
displayName, cLevel, cLevelLast,
fileSizes, nbFiles,
dictBuffer, dictBufferSize, compressionParams, setRealTimePrio);
}
/* clean up */
free(srcBuffer);
free(dictBuffer);
free(fileSizes);
}
static void BMK_syntheticTest(int cLevel, int cLevelLast, double compressibility, ZSTD_compressionParameters* compressionParams, int setRealTimePrio)
{
char name[20] = {0};
size_t benchedSize = 10000000;
void* const 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, compressionParams, setRealTimePrio);
/* clean up */
free(srcBuffer);
}
int BMK_benchFiles(const char** fileNamesTable, unsigned nbFiles, const char* dictFileName,
int cLevel, int cLevelLast, ZSTD_compressionParameters* compressionParams, int setRealTimePrio)
{
double const compressibility = (double)g_compressibilityDefault / 100;
if (cLevel < 1) cLevel = 1; /* minimum compression level */
if (cLevel > ZSTD_maxCLevel()) cLevel = ZSTD_maxCLevel();
if (cLevelLast > ZSTD_maxCLevel()) cLevelLast = ZSTD_maxCLevel();
if (cLevelLast < cLevel) cLevelLast = cLevel;
if (cLevelLast > cLevel) DISPLAYLEVEL(2, "Benchmarking levels from %d to %d\n", cLevel, cLevelLast);
if (nbFiles == 0)
BMK_syntheticTest(cLevel, cLevelLast, compressibility, compressionParams, setRealTimePrio);
else
BMK_benchFileTable(fileNamesTable, nbFiles, dictFileName, cLevel, cLevelLast, compressionParams, setRealTimePrio);
return 0;
}
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