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/*
* Copyright (c) 2016-2020, Yann Collet, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under both the BSD-style license (found in the
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
* in the COPYING file in the root directory of this source tree).
* You may select, at your option, one of the above-listed licenses.
*/
/* benchzstd :
* benchmark Zstandard compression / decompression
* over a set of files or buffers
* and display progress result and final summary
*/
#if defined (__cplusplus)
extern "C" {
#endif
#ifndef BENCH_ZSTD_H_3242387
#define BENCH_ZSTD_H_3242387
/* === Dependencies === */
#include <stddef.h> /* size_t */
#define ZSTD_STATIC_LINKING_ONLY /* ZSTD_compressionParameters */
#include "../lib/zstd.h" /* ZSTD_compressionParameters */
/* === Constants === */
#define MB_UNIT 1000000
/* === Benchmark functions === */
/* Creates a variant `typeName`, able to express "error or valid result".
* Functions with return type `typeName`
* must first check if result is valid, using BMK_isSuccessful_*(),
* and only then can extract `baseType`.
*/
#define VARIANT_ERROR_RESULT(baseType, variantName) \
\
typedef struct { \
baseType internal_never_use_directly; \
int tag; \
} variantName
typedef struct {
size_t cSize;
unsigned long long cSpeed; /* bytes / sec */
unsigned long long dSpeed;
size_t cMem; /* memory usage during compression */
} BMK_benchResult_t;
VARIANT_ERROR_RESULT(BMK_benchResult_t, BMK_benchOutcome_t);
/* check first if the return structure represents an error or a valid result */
int BMK_isSuccessful_benchOutcome(BMK_benchOutcome_t outcome);
/* extract result from variant type.
* note : this function will abort() program execution if result is not valid
* check result validity first, by using BMK_isSuccessful_benchOutcome()
*/
BMK_benchResult_t BMK_extract_benchResult(BMK_benchOutcome_t outcome);
/*! BMK_benchFiles() -- called by zstdcli */
/* Loads files from fileNamesTable into memory,
* and an optional dictionary from dictFileName (can be NULL),
* then uses benchMem().
* fileNamesTable - name of files to benchmark.
* nbFiles - number of files (size of fileNamesTable), must be > 0.
* dictFileName - name of dictionary file to load.
* cLevel - compression level to benchmark, errors if invalid.
* compressionParams - advanced compression Parameters.
* displayLevel - what gets printed:
* 0 : no display;
* 1 : errors;
* 2 : + result + interaction + warnings;
* 3 : + information;
* 4 : + debug
* @return:
* a variant, which expresses either an error, or a valid result.
* Use BMK_isSuccessful_benchOutcome() to check if function was successful.
* If yes, extract the valid result with BMK_extract_benchResult(),
* it will contain :
* .cSpeed: compression speed in bytes per second,
* .dSpeed: decompression speed in bytes per second,
* .cSize : compressed size, in bytes
* .cMem : memory budget required for the compression context
*/
BMK_benchOutcome_t BMK_benchFiles(
const char* const * fileNamesTable, unsigned nbFiles,
const char* dictFileName,
int cLevel, const ZSTD_compressionParameters* compressionParams,
int displayLevel);
typedef enum {
BMK_both = 0,
BMK_decodeOnly = 1,
BMK_compressOnly = 2
} BMK_mode_t;
typedef struct {
BMK_mode_t mode; /* 0: all, 1: compress only 2: decode only */
unsigned nbSeconds; /* default timing is in nbSeconds */
size_t blockSize; /* Maximum size of each block*/
int nbWorkers; /* multithreading */
unsigned realTime; /* real time priority */
int additionalParam; /* used by python speed benchmark */
int ldmFlag; /* enables long distance matching */
int ldmMinMatch; /* below: parameters for long distance matching, see zstd.1.md */
int ldmHashLog;
int ldmBucketSizeLog;
int ldmHashRateLog;
ZSTD_literalCompressionMode_e literalCompressionMode;
} BMK_advancedParams_t;
/* returns default parameters used by nonAdvanced functions */
BMK_advancedParams_t BMK_initAdvancedParams(void);
/*! BMK_benchFilesAdvanced():
* Same as BMK_benchFiles(),
* with more controls, provided through advancedParams_t structure */
BMK_benchOutcome_t BMK_benchFilesAdvanced(
const char* const * fileNamesTable, unsigned nbFiles,
const char* dictFileName,
int cLevel, const ZSTD_compressionParameters* compressionParams,
int displayLevel, const BMK_advancedParams_t* adv);
/*! BMK_syntheticTest() -- called from zstdcli */
/* Generates a sample with datagen, using compressibility argument */
/* cLevel - compression level to benchmark, errors if invalid
* compressibility - determines compressibility of sample
* compressionParams - basic compression Parameters
* displayLevel - see benchFiles
* adv - see advanced_Params_t
* @return:
* a variant, which expresses either an error, or a valid result.
* Use BMK_isSuccessful_benchOutcome() to check if function was successful.
* If yes, extract the valid result with BMK_extract_benchResult(),
* it will contain :
* .cSpeed: compression speed in bytes per second,
* .dSpeed: decompression speed in bytes per second,
* .cSize : compressed size, in bytes
* .cMem : memory budget required for the compression context
*/
BMK_benchOutcome_t BMK_syntheticTest(
int cLevel, double compressibility,
const ZSTD_compressionParameters* compressionParams,
int displayLevel, const BMK_advancedParams_t* adv);
/* === Benchmark Zstandard in a memory-to-memory scenario === */
/** BMK_benchMem() -- core benchmarking function, called in paramgrill
* applies ZSTD_compress_generic() and ZSTD_decompress_generic() on data in srcBuffer
* with specific compression parameters provided by other arguments using benchFunction
* (cLevel, comprParams + adv in advanced Mode) */
/* srcBuffer - data source, expected to be valid compressed data if in Decode Only Mode
* srcSize - size of data in srcBuffer
* fileSizes - srcBuffer is considered cut into 1+ segments, to compress separately.
* note : sum(fileSizes) must be == srcSize. (<== ensure it's properly checked)
* nbFiles - nb of segments
* cLevel - compression level
* comprParams - basic compression parameters
* dictBuffer - a dictionary if used, null otherwise
* dictBufferSize - size of dictBuffer, 0 otherwise
* displayLevel - see BMK_benchFiles
* displayName - name used by display
* @return:
* a variant, which expresses either an error, or a valid result.
* Use BMK_isSuccessful_benchOutcome() to check if function was successful.
* If yes, extract the valid result with BMK_extract_benchResult(),
* it will contain :
* .cSpeed: compression speed in bytes per second,
* .dSpeed: decompression speed in bytes per second,
* .cSize : compressed size, in bytes
* .cMem : memory budget required for the compression context
*/
BMK_benchOutcome_t BMK_benchMem(const void* srcBuffer, size_t srcSize,
const size_t* fileSizes, unsigned nbFiles,
int cLevel, const ZSTD_compressionParameters* comprParams,
const void* dictBuffer, size_t dictBufferSize,
int displayLevel, const char* displayName);
/* BMK_benchMemAdvanced() : same as BMK_benchMem()
* with following additional options :
* dstBuffer - destination buffer to write compressed output in, NULL if none provided.
* dstCapacity - capacity of destination buffer, give 0 if dstBuffer = NULL
* adv = see advancedParams_t
*/
BMK_benchOutcome_t BMK_benchMemAdvanced(const void* srcBuffer, size_t srcSize,
void* dstBuffer, size_t dstCapacity,
const size_t* fileSizes, unsigned nbFiles,
int cLevel, const ZSTD_compressionParameters* comprParams,
const void* dictBuffer, size_t dictBufferSize,
int displayLevel, const char* displayName,
const BMK_advancedParams_t* adv);
#endif /* BENCH_ZSTD_H_3242387 */
#if defined (__cplusplus)
}
#endif
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