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050efba81b
zstd/programs/bench.c
Yann Collet 050efba81b level tuning
2015-11-03 09:49:30 +01:00

537 lines
16 KiB
C
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/*
bench.c - Demo module to benchmark open-source compression algorithms
Copyright (C) Yann Collet 2012-2015
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 source repository : https://github.com/Cyan4973/zstd
- ztsd public forum : https://groups.google.com/forum/#!forum/lz4c
*/
/* **************************************
* Compiler Options
****************************************/
/* Disable some Visual warning messages */
#define _CRT_SECURE_NO_WARNINGS /* fopen */
/* 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
/* S_ISREG & gettimeofday() are not supported by MSVC */
#if defined(_MSC_VER) || defined(_WIN32)
# define BMK_LEGACY_TIMER 1
#endif
/* *************************************
* Includes
***************************************/
#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 */
/* Use ftime() if gettimeofday() is not available */
#if defined(BMK_LEGACY_TIMER)
# include <sys/timeb.h> /* timeb, ftime */
#else
# include <sys/time.h> /* gettimeofday */
#endif
#include "mem.h"
#include "zstd.h"
#include "zstdhc.h"
#include "xxhash.h"
/* *************************************
* Compiler specifics
***************************************/
#if !defined(S_ISREG)
# define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
#endif
/* *************************************
* Constants
***************************************/
#define NBLOOPS 3
#define TIMELOOP 2500
#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) : 8ULL GB;
#define DEFAULT_CHUNKSIZE (4 MB)
static U32 g_compressibilityDefault = 50;
static U32 prime1 = 2654435761U;
static U32 prime2 = 2246822519U;
/* *************************************
* Macros
***************************************/
#define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
/* *************************************
* Benchmark Parameters
***************************************/
static int nbIterations = NBLOOPS;
static size_t g_blockSize = 0;
void BMK_SetNbIterations(int nbLoops)
{
nbIterations = nbLoops;
DISPLAY("- %i iterations -\n", nbIterations);
}
void BMK_SetBlockSize(size_t blockSize)
{
g_blockSize = blockSize;
DISPLAY("using blocks of size %u KB \n", (U32)(blockSize>>10));
}
/* ********************************************************
* Private functions
**********************************************************/
#if defined(BMK_LEGACY_TIMER)
static int BMK_GetMilliStart(void)
{
/* 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(void)
{
/* 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;
}
/* ********************************************************
* Data generator
**********************************************************/
/* will hopefully be converted into ROL instruction by compiler */
static U32 BMK_rotl32(unsigned val32, unsigned nbBits) { return((val32 << nbBits) | (val32 >> (32 - nbBits))); }
static U32 BMK_rand(U32* src)
{
U32 rand32 = *src;
rand32 *= prime1;
rand32 += prime2;
rand32 = BMK_rotl32(rand32, 13);
*src = rand32;
return rand32 >> 9;
}
#define BMK_RAND15BITS ( BMK_rand(&seed) & 0x7FFF)
#define BMK_RANDLENGTH ((BMK_rand(&seed) & 3) ? (BMK_rand(&seed) % 15) : (BMK_rand(&seed) % 510) + 15)
#define BMK_RANDCHAR (BYTE)((BMK_rand(&seed) & 63) + '0')
static void BMK_datagen(void* buffer, size_t bufferSize, double proba, U32 seed)
{
BYTE* BBuffer = (BYTE*)buffer;
unsigned pos = 0;
U32 P32 = (U32)(32768 * proba);
/* First Byte */
BBuffer[pos++] = BMK_RANDCHAR;
while (pos < bufferSize)
{
/* Select : Literal (noise) or copy (within 64K) */
if (BMK_RAND15BITS < P32)
{
/* Match */
size_t match, end;
unsigned length = BMK_RANDLENGTH + 4;
unsigned offset = BMK_RAND15BITS + 1;
if (offset > pos) offset = pos;
match = pos - offset;
end = pos + length;
if (end > bufferSize) end = bufferSize;
while (pos < end) BBuffer[pos++] = BBuffer[match++];
}
else
{
/* Literal */
size_t end;
unsigned length = BMK_RANDLENGTH;
end = pos + length;
if (end > bufferSize) end = bufferSize;
while (pos < end) BBuffer[pos++] = BMK_RANDCHAR;
}
}
}
/* ********************************************************
* Bench functions
**********************************************************/
typedef struct
{
char* srcPtr;
size_t srcSize;
char* cPtr;
size_t cRoom;
size_t cSize;
char* resPtr;
size_t resSize;
} blockParam_t;
typedef size_t (*compressor_t) (void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel);
static size_t local_compress_fast (void* dst, size_t maxDstSize, const void* src, size_t srcSize, int compressionLevel)
{
(void)compressionLevel;
return ZSTD_compress(dst, maxDstSize, src, srcSize);
}
#define MIN(a,b) ((a)<(b) ? (a) : (b))
static int BMK_benchMem(void* srcBuffer, size_t srcSize, const char* fileName, int cLevel)
{
const size_t blockSize = g_blockSize ? g_blockSize : srcSize;
const U32 nbBlocks = (U32) ((srcSize + (blockSize-1)) / blockSize);
blockParam_t* const blockTable = (blockParam_t*) malloc(nbBlocks * sizeof(blockParam_t));
const size_t maxCompressedSize = (size_t)nbBlocks * ZSTD_compressBound(blockSize);
void* const compressedBuffer = malloc(maxCompressedSize);
void* const resultBuffer = malloc(srcSize);
const compressor_t compressor = (cLevel <= 1) ? local_compress_fast : ZSTD_HC_compress;
U64 crcOrig;
/* init */
if (strlen(fileName)>16)
fileName += strlen(fileName)-16;
/* Memory allocation & restrictions */
if (!compressedBuffer || !resultBuffer || !blockTable)
{
DISPLAY("\nError: not enough memory!\n");
free(compressedBuffer);
free(resultBuffer);
free(blockTable);
return 12;
}
/* Calculating input Checksum */
crcOrig = XXH64(srcBuffer, srcSize, 0);
/* Init blockTable data */
{
U32 i;
size_t remaining = srcSize;
char* srcPtr = (char*)srcBuffer;
char* cPtr = (char*)compressedBuffer;
char* resPtr = (char*)resultBuffer;
for (i=0; i<nbBlocks; i++)
{
size_t thisBlockSize = MIN(remaining, blockSize);
blockTable[i].srcPtr = srcPtr;
blockTable[i].cPtr = cPtr;
blockTable[i].resPtr = resPtr;
blockTable[i].srcSize = thisBlockSize;
blockTable[i].cRoom = ZSTD_compressBound(thisBlockSize);
srcPtr += thisBlockSize;
cPtr += blockTable[i].cRoom;
resPtr += thisBlockSize;
remaining -= thisBlockSize;
}
}
/* warmimg up memory */
BMK_datagen(compressedBuffer, maxCompressedSize, 0.10, 1);
/* Bench */
{
int loopNb;
size_t cSize = 0;
double fastestC = 100000000., fastestD = 100000000.;
double ratio = 0.;
U64 crcCheck = 0;
DISPLAY("\r%79s\r", "");
for (loopNb = 1; loopNb <= nbIterations; loopNb++)
{
int nbLoops;
int milliTime;
U32 blockNb;
/* Compression */
DISPLAY("%2i-%-17.17s :%10u ->\r", loopNb, fileName, (U32)srcSize);
memset(compressedBuffer, 0xE5, maxCompressedSize);
nbLoops = 0;
milliTime = BMK_GetMilliStart();
while (BMK_GetMilliStart() == milliTime);
milliTime = BMK_GetMilliStart();
while (BMK_GetMilliSpan(milliTime) < TIMELOOP)
{
for (blockNb=0; blockNb<nbBlocks; blockNb++)
blockTable[blockNb].cSize = compressor(blockTable[blockNb].cPtr, blockTable[blockNb].cRoom, blockTable[blockNb].srcPtr,blockTable[blockNb].srcSize, cLevel);
nbLoops++;
}
milliTime = BMK_GetMilliSpan(milliTime);
cSize = 0;
for (blockNb=0; blockNb<nbBlocks; blockNb++)
cSize += blockTable[blockNb].cSize;
if ((double)milliTime < fastestC*nbLoops) fastestC = (double)milliTime / nbLoops;
ratio = (double)srcSize / (double)cSize;
DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s\r", loopNb, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000.);
#if 1
/* Decompression */
memset(resultBuffer, 0xD6, srcSize);
nbLoops = 0;
milliTime = BMK_GetMilliStart();
while (BMK_GetMilliStart() == milliTime);
milliTime = BMK_GetMilliStart();
for ( ; BMK_GetMilliSpan(milliTime) < TIMELOOP; nbLoops++)
{
for (blockNb=0; blockNb<nbBlocks; blockNb++)
blockTable[blockNb].resSize = ZSTD_decompress(blockTable[blockNb].resPtr, blockTable[blockNb].srcSize,
blockTable[blockNb].cPtr, blockTable[blockNb].cSize);
}
milliTime = BMK_GetMilliSpan(milliTime);
if ((double)milliTime < fastestD*nbLoops) fastestD = (double)milliTime / nbLoops;
DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s\r", loopNb, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
/* CRC Checking */
crcCheck = XXH64(resultBuffer, srcSize, 0);
if (crcOrig!=crcCheck)
{
unsigned u;
unsigned eBlockSize = (unsigned)(MIN(65536*2, blockSize));
DISPLAY("\n!!! WARNING !!! %14s : Invalid Checksum : %x != %x\n", fileName, (unsigned)crcOrig, (unsigned)crcCheck);
for (u=0; u<srcSize; u++)
{
if (((BYTE*)srcBuffer)[u] != ((BYTE*)resultBuffer)[u])
{
printf("Decoding error at pos %u (block %u, pos %u) \n", u, u / eBlockSize, u % eBlockSize);
break;
}
}
break;
}
#endif
}
if (crcOrig == crcCheck)
DISPLAY("%2i-%-17.17s :%10i ->%10i (%5.3f),%6.1f MB/s ,%6.1f MB/s \n", cLevel, fileName, (int)srcSize, (int)cSize, ratio, (double)srcSize / fastestC / 1000., (double)srcSize / fastestD / 1000.);
}
/* End cleaning */
free(compressedBuffer);
free(resultBuffer);
return 0;
}
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;
}
static size_t BMK_findMaxMem(U64 requiredMem)
{
size_t step = 64 MB;
BYTE* testmem = NULL;
requiredMem = (((requiredMem >> 26) + 1) << 26);
requiredMem += 2 * step;
if (requiredMem > maxMemory) requiredMem = maxMemory;
while (!testmem)
{
requiredMem -= step;
testmem = (BYTE*)malloc((size_t)requiredMem);
}
free(testmem);
return (size_t)(requiredMem - step);
}
static int BMK_benchOneFile(char* inFileName, int cLevel)
{
FILE* inFile;
U64 inFileSize;
size_t benchedSize, readSize;
void* srcBuffer;
int result=0;
/* Check file existence */
inFile = fopen(inFileName, "rb");
if (inFile == NULL)
{
DISPLAY("Pb opening %s\n", inFileName);
return 11;
}
/* Memory allocation & restrictions */
inFileSize = BMK_GetFileSize(inFileName);
benchedSize = BMK_findMaxMem(inFileSize * 3) / 3;
if ((U64)benchedSize > inFileSize) benchedSize = (size_t)inFileSize;
if (benchedSize < inFileSize)
DISPLAY("Not enough memory for '%s' full size; testing %i MB only...\n", inFileName, (int)(benchedSize >> 20));
srcBuffer = malloc(benchedSize);
if (!srcBuffer)
{
DISPLAY("\nError: not enough memory!\n");
fclose(inFile);
return 12;
}
/* Fill input buffer */
DISPLAY("Loading %s... \r", inFileName);
readSize = fread(srcBuffer, 1, benchedSize, inFile);
fclose(inFile);
if (readSize != benchedSize)
{
DISPLAY("\nError: problem reading file '%s' !! \n", inFileName);
free(srcBuffer);
return 13;
}
/* Bench */
if (cLevel<0)
{
int l;
for (l=1; l <= -cLevel; l++)
result = BMK_benchMem(srcBuffer, benchedSize, inFileName, l);
}
else
result = BMK_benchMem(srcBuffer, benchedSize, inFileName, cLevel);
/* clean up */
free(srcBuffer);
DISPLAY("\n");
return result;
}
static int BMK_syntheticTest(int cLevel, double compressibility)
{
size_t benchedSize = 10000000;
void* srcBuffer = malloc(benchedSize);
int result=0;
char name[20] = {0};
/* Memory allocation */
if (!srcBuffer)
{
DISPLAY("\nError: not enough memory!\n");
free(srcBuffer);
return 12;
}
/* Fill input buffer */
BMK_datagen(srcBuffer, benchedSize, compressibility, 0);
/* Bench */
#ifdef _MSC_VER
sprintf_s(name, 20, "Synthetic %2u%%", (unsigned)(compressibility*100));
#else
snprintf (name, 20, "Synthetic %2u%%", (unsigned)(compressibility*100));
#endif
/* Bench */
if (cLevel<0)
{
int l;
for (l=1; l <= -cLevel; l++)
result = BMK_benchMem(srcBuffer, benchedSize, name, l);
}
else
result = BMK_benchMem(srcBuffer, benchedSize, name, cLevel);
/* End */
free(srcBuffer);
DISPLAY("\n");
return result;
}
int BMK_benchFiles(char** fileNamesTable, unsigned nbFiles, unsigned cLevel)
{
double compressibility = (double)g_compressibilityDefault / 100;
if (nbFiles == 0)
{
BMK_syntheticTest(cLevel, compressibility);
}
else
{
/* Loop for each file */
unsigned fileIdx = 0;
while (fileIdx<nbFiles)
{
BMK_benchOneFile(fileNamesTable[fileIdx], cLevel);
fileIdx++;
}
}
return 0;
}
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