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# build artifacts
*.o
benchHash
benchHash32
benchHash_avx2
benchHash_hw
# test files
test*

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# ################################################################
# xxHash benchHash Makefile
# Copyright (C) 2019-2021 Yann Collet
#
# 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:
# - xxHash homepage: https://www.xxhash.com
# - xxHash source repository: https://github.com/Cyan4973/xxHash
# ################################################################
# benchHash: A generic benchmark for hash algorithms
# measuring throughput, latency and bandwidth
# ################################################################
CPPFLAGS += -I../.. # directory of xxHash source files
CFLAGS ?= -O3
CFLAGS += -Wall -Wextra -Wstrict-aliasing=1 \
-std=c99
CFLAGS += $(MOREFLAGS) # custom way to add flags
CXXFLAGS ?= -O3
LDFLAGS += $(MOREFLAGS)
OBJ_LIST = main.o bhDisplay.o benchHash.o benchfn.o timefn.o
default: benchHash
all: benchHash
benchHash32: CFLAGS += -m32
benchHash32: CXXFLAGS += -m32
benchHash_avx2: CFLAGS += -mavx2
benchHash_avx2: CXXFLAGS += -mavx2
benchHash_hw: CPPFLAGS += -DHARDWARE_SUPPORT
benchHash_hw: CFLAGS += -mavx2 -maes
benchHash_hw: CXXFLAGS += -mavx2 -mpclmul -std=c++14
benchHash benchHash32 benchHash_avx2 benchHash_nosimd benchHash_hw: $(OBJ_LIST)
$(CXX) $(CPPFLAGS) $(CXXFLAGS) $^ $(LDFLAGS) -o $@
main.o: bhDisplay.h hashes.h
bhDisplay.o: bhDisplay.h benchHash.h
benchHash.o: benchHash.h
clean:
$(RM) *.o benchHash benchHash32 benchHash_avx2 benchHash_hw

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/*
* Hash benchmark module
* Part of the xxHash project
* Copyright (C) 2019-2021 Yann Collet
*
* 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:
* - xxHash homepage: https://www.xxhash.com
* - xxHash source repository: https://github.com/Cyan4973/xxHash
*/
/* benchmark hash functions */
#include <stdlib.h> // malloc
#include <assert.h>
#include <string.h>
#include "benchHash.h"
static void initBuffer(void* buffer, size_t size)
{
const unsigned long long k1 = 11400714785074694791ULL; /* 0b1001111000110111011110011011000110000101111010111100101010000111 */
const unsigned long long k2 = 14029467366897019727ULL; /* 0b1100001010110010101011100011110100100111110101001110101101001111 */
unsigned long long acc = k2;
unsigned char* const p = (unsigned char*)buffer;
for (size_t s = 0; s < size; s++) {
acc *= k1;
p[s] = (unsigned char)(acc >> 56);
}
}
#define MARGIN_FOR_LATENCY 1024
#define START_MASK (MARGIN_FOR_LATENCY-1)
typedef size_t (*sizeFunction_f)(size_t targetSize);
/*
* bench_hash_internal():
* Benchmarks hashfn repeateadly over single input of size `size`
* return: nb of hashes per second
*/
static double
bench_hash_internal(BMK_benchFn_t hashfn, void* payload,
size_t nbBlocks, sizeFunction_f selectSize, size_t size,
unsigned total_time_ms, unsigned iter_time_ms)
{
BMK_timedFnState_shell shell;
BMK_timedFnState_t* const txf = BMK_initStatic_timedFnState(&shell, sizeof(shell), total_time_ms, iter_time_ms);
assert(txf != NULL);
size_t const srcSize = (size_t)size;
size_t const srcBufferSize = srcSize + MARGIN_FOR_LATENCY;
void* const srcBuffer = malloc(srcBufferSize);
assert(srcBuffer != NULL);
initBuffer(srcBuffer, srcBufferSize);
#define FAKE_DSTSIZE 32
size_t const dstSize = FAKE_DSTSIZE;
char dstBuffer_static[FAKE_DSTSIZE] = {0};
#define NB_BLOCKS_MAX 1024
const void* srcBuffers[NB_BLOCKS_MAX];
size_t srcSizes[NB_BLOCKS_MAX];
void* dstBuffers[NB_BLOCKS_MAX];
size_t dstCapacities[NB_BLOCKS_MAX];
assert(nbBlocks < NB_BLOCKS_MAX);
assert(size > 0);
for (size_t n=0; n < nbBlocks; n++) {
srcBuffers[n] = srcBuffer;
srcSizes[n] = selectSize(size);
dstBuffers[n] = dstBuffer_static;
dstCapacities[n] = dstSize;
}
BMK_benchParams_t params = {
.benchFn = hashfn,
.benchPayload = payload,
.initFn = NULL,
.initPayload = NULL,
.errorFn = NULL,
.blockCount = nbBlocks,
.srcBuffers = srcBuffers,
.srcSizes = srcSizes,
.dstBuffers = dstBuffers,
.dstCapacities = dstCapacities,
.blockResults = NULL
};
BMK_runOutcome_t result;
memset(&result, 0, sizeof(result));
while (!BMK_isCompleted_TimedFn(txf)) {
result = BMK_benchTimedFn(txf, params);
assert(BMK_isSuccessful_runOutcome(result));
}
BMK_runTime_t const runTime = BMK_extract_runTime(result);
free(srcBuffer);
assert(runTime.nanoSecPerRun != 0);
return (1000000000U / runTime.nanoSecPerRun) * nbBlocks;
}
static size_t rand_1_N(size_t N) { return ((size_t)rand() % N) + 1; }
static size_t identity(size_t s) { return s; }
static size_t
benchLatency(const void* src, size_t srcSize,
void* dst, size_t dstCapacity,
void* customPayload)
{
(void)dst; (void)dstCapacity;
BMK_benchFn_t benchfn = (BMK_benchFn_t)customPayload;
static size_t hash = 0;
const void* const start = (const char*)src + (hash & START_MASK);
return hash = benchfn(start, srcSize, dst, dstCapacity, NULL);
}
#ifndef SIZE_TO_HASH_PER_ROUND
# define SIZE_TO_HASH_PER_ROUND 200000
#endif
#ifndef NB_HASH_ROUNDS_MAX
# define NB_HASH_ROUNDS_MAX 1000
#endif
double bench_hash(BMK_benchFn_t hashfn,
BMK_benchMode benchMode,
size_t size, BMK_sizeMode sizeMode,
unsigned total_time_ms, unsigned iter_time_ms)
{
sizeFunction_f const sizef = (sizeMode == BMK_fixedSize) ? identity : rand_1_N;
BMK_benchFn_t const benchfn = (benchMode == BMK_throughput) ? hashfn : benchLatency;
BMK_benchFn_t const payload = (benchMode == BMK_throughput) ? NULL : hashfn;
size_t nbBlocks = (SIZE_TO_HASH_PER_ROUND / size) + 1;
if (nbBlocks > NB_HASH_ROUNDS_MAX) nbBlocks = NB_HASH_ROUNDS_MAX;
return bench_hash_internal(benchfn, payload,
nbBlocks, sizef, size,
total_time_ms, iter_time_ms);
}

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/*
* Hash benchmark module
* Part of the xxHash project
* Copyright (C) 2019-2021 Yann Collet
*
* 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:
* - xxHash homepage: https://www.xxhash.com
* - xxHash source repository: https://github.com/Cyan4973/xxHash
*/
#ifndef BENCH_HASH_H_983426678
#define BENCH_HASH_H_983426678
#if defined (__cplusplus)
extern "C" {
#endif
/* === Dependencies === */
#include "benchfn.h" /* BMK_benchFn_t */
/* === Declarations === */
typedef enum { BMK_throughput, BMK_latency } BMK_benchMode;
typedef enum { BMK_fixedSize, /* hash always `size` bytes */
BMK_randomSize, /* hash a random nb of bytes, between 1 and `size` (inclusive) */
} BMK_sizeMode;
/*
* bench_hash():
* Returns speed expressed as nb hashes per second.
* total_time_ms: time spent benchmarking the hash function with given parameters
* iter_time_ms: time spent for one round. If multiple rounds are run,
* bench_hash() will report the speed of best round.
*/
double bench_hash(BMK_benchFn_t hashfn,
BMK_benchMode benchMode,
size_t size, BMK_sizeMode sizeMode,
unsigned total_time_ms, unsigned iter_time_ms);
#if defined (__cplusplus)
}
#endif
#endif /* BENCH_HASH_H_983426678 */

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/*
* Copyright (C) 2016-2021 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.
*/
/* *************************************
* Includes
***************************************/
#include <stdlib.h> /* malloc, free */
#include <string.h> /* memset */
#undef NDEBUG /* assert must not be disabled */
#include <assert.h> /* assert */
#include "timefn.h" /* UTIL_time_t, UTIL_getTime */
#include "benchfn.h"
/* *************************************
* Constants
***************************************/
#define TIMELOOP_MICROSEC SEC_TO_MICRO /* 1 second */
#define TIMELOOP_NANOSEC (1*1000000000ULL) /* 1 second */
#define KB *(1 <<10)
#define MB *(1 <<20)
#define GB *(1U<<30)
/* *************************************
* Debug errors
***************************************/
#if defined(DEBUG) && (DEBUG >= 1)
# include <stdio.h> /* fprintf */
# define DISPLAY(...) fprintf(stderr, __VA_ARGS__)
# define DEBUGOUTPUT(...) { if (DEBUG) DISPLAY(__VA_ARGS__); }
#else
# define DEBUGOUTPUT(...)
#endif
/* error without displaying */
#define RETURN_QUIET_ERROR(retValue, ...) { \
DEBUGOUTPUT("%s: %i: \n", __FILE__, __LINE__); \
DEBUGOUTPUT("Error : "); \
DEBUGOUTPUT(__VA_ARGS__); \
DEBUGOUTPUT(" \n"); \
return retValue; \
}
/* *************************************
* Benchmarking an arbitrary function
***************************************/
int BMK_isSuccessful_runOutcome(BMK_runOutcome_t outcome)
{
return outcome.error_tag_never_ever_use_directly == 0;
}
/* warning : this function will stop program execution if outcome is invalid !
* check outcome validity first, using BMK_isValid_runResult() */
BMK_runTime_t BMK_extract_runTime(BMK_runOutcome_t outcome)
{
assert(outcome.error_tag_never_ever_use_directly == 0);
return outcome.internal_never_ever_use_directly;
}
size_t BMK_extract_errorResult(BMK_runOutcome_t outcome)
{
assert(outcome.error_tag_never_ever_use_directly != 0);
return outcome.error_result_never_ever_use_directly;
}
static BMK_runOutcome_t BMK_runOutcome_error(size_t errorResult)
{
BMK_runOutcome_t b;
memset(&b, 0, sizeof(b));
b.error_tag_never_ever_use_directly = 1;
b.error_result_never_ever_use_directly = errorResult;
return b;
}
static BMK_runOutcome_t BMK_setValid_runTime(BMK_runTime_t runTime)
{
BMK_runOutcome_t outcome;
memset(&outcome, 0, sizeof(outcome));
outcome.error_tag_never_ever_use_directly = 0;
outcome.internal_never_ever_use_directly = runTime;
return outcome;
}
/* initFn will be measured once, benchFn will be measured `nbLoops` times */
/* initFn is optional, provide NULL if none */
/* benchFn must return a size_t value that errorFn can interpret */
/* takes # of blocks and list of size & stuff for each. */
/* can report result of benchFn for each block into blockResult. */
/* blockResult is optional, provide NULL if this information is not required */
/* note : time per loop can be reported as zero if run time < timer resolution */
BMK_runOutcome_t BMK_benchFunction(BMK_benchParams_t p,
unsigned nbLoops)
{
/* init */
{ size_t i;
for (i = 0; i < p.blockCount; i++) {
memset(p.dstBuffers[i], 0xE5, p.dstCapacities[i]); /* warm up and erase result buffer */
} }
/* benchmark */
{ UTIL_time_t const clockStart = UTIL_getTime();
size_t dstSize = 0;
unsigned loopNb, blockNb;
nbLoops += !nbLoops; /* minimum nbLoops is 1 */
if (p.initFn != NULL) p.initFn(p.initPayload);
for (loopNb = 0; loopNb < nbLoops; loopNb++) {
for (blockNb = 0; blockNb < p.blockCount; blockNb++) {
size_t const res = p.benchFn(p.srcBuffers[blockNb], p.srcSizes[blockNb],
p.dstBuffers[blockNb], p.dstCapacities[blockNb],
p.benchPayload);
if (loopNb == 0) {
if (p.blockResults != NULL) p.blockResults[blockNb] = res;
if ((p.errorFn != NULL) && (p.errorFn(res))) {
RETURN_QUIET_ERROR(BMK_runOutcome_error(res),
"Function benchmark failed on block %u (of size %u) with error %i",
blockNb, (unsigned)p.srcSizes[blockNb], (int)res);
}
dstSize += res;
} }
} /* for (loopNb = 0; loopNb < nbLoops; loopNb++) */
{ PTime const totalTime = UTIL_clockSpanNano(clockStart);
BMK_runTime_t rt;
rt.nanoSecPerRun = (double)totalTime / nbLoops;
rt.sumOfReturn = dstSize;
return BMK_setValid_runTime(rt);
} }
}
/* ==== Benchmarking any function, providing intermediate results ==== */
struct BMK_timedFnState_s {
PTime timeSpent_ns;
PTime timeBudget_ns;
PTime runBudget_ns;
BMK_runTime_t fastestRun;
unsigned nbLoops;
UTIL_time_t coolTime;
}; /* typedef'd to BMK_timedFnState_t within bench.h */
BMK_timedFnState_t* BMK_createTimedFnState(unsigned total_ms, unsigned run_ms)
{
BMK_timedFnState_t* const r = (BMK_timedFnState_t*)malloc(sizeof(*r));
if (r == NULL) return NULL; /* malloc() error */
BMK_resetTimedFnState(r, total_ms, run_ms);
return r;
}
void BMK_freeTimedFnState(BMK_timedFnState_t* state) { free(state); }
BMK_timedFnState_t*
BMK_initStatic_timedFnState(void* buffer, size_t size, unsigned total_ms, unsigned run_ms)
{
typedef char check_size[ 2 * (sizeof(BMK_timedFnState_shell) >= sizeof(struct BMK_timedFnState_s)) - 1]; /* static assert : a compilation failure indicates that BMK_timedFnState_shell is not large enough */
typedef struct { check_size c; BMK_timedFnState_t tfs; } tfs_align; /* force tfs to be aligned at its next best position */
size_t const tfs_alignment = offsetof(tfs_align, tfs); /* provides the minimal alignment restriction for BMK_timedFnState_t */
BMK_timedFnState_t* const r = (BMK_timedFnState_t*)buffer;
if (buffer == NULL) return NULL;
if (size < sizeof(struct BMK_timedFnState_s)) return NULL;
if ((size_t)buffer % tfs_alignment) return NULL; /* buffer must be properly aligned */
BMK_resetTimedFnState(r, total_ms, run_ms);
return r;
}
void BMK_resetTimedFnState(BMK_timedFnState_t* timedFnState, unsigned total_ms, unsigned run_ms)
{
if (!total_ms) total_ms = 1 ;
if (!run_ms) run_ms = 1;
if (run_ms > total_ms) run_ms = total_ms;
timedFnState->timeSpent_ns = 0;
timedFnState->timeBudget_ns = (PTime)total_ms * TIMELOOP_NANOSEC / 1000;
timedFnState->runBudget_ns = (PTime)run_ms * TIMELOOP_NANOSEC / 1000;
timedFnState->fastestRun.nanoSecPerRun = (double)TIMELOOP_NANOSEC * 2000000000; /* hopefully large enough : must be larger than any potential measurement */
timedFnState->fastestRun.sumOfReturn = (size_t)(-1LL);
timedFnState->nbLoops = 1;
timedFnState->coolTime = UTIL_getTime();
}
/* Tells if nb of seconds set in timedFnState for all runs is spent.
* note : this function will return 1 if BMK_benchFunctionTimed() has actually errored. */
int BMK_isCompleted_TimedFn(const BMK_timedFnState_t* timedFnState)
{
return (timedFnState->timeSpent_ns >= timedFnState->timeBudget_ns);
}
#undef MIN
#define MIN(a,b) ( (a) < (b) ? (a) : (b) )
#define MINUSABLETIME (TIMELOOP_NANOSEC / 2) /* 0.5 seconds */
BMK_runOutcome_t BMK_benchTimedFn(BMK_timedFnState_t* cont,
BMK_benchParams_t p)
{
PTime const runBudget_ns = cont->runBudget_ns;
PTime const runTimeMin_ns = runBudget_ns / 2;
BMK_runTime_t bestRunTime = cont->fastestRun;
for (;;) {
BMK_runOutcome_t const runResult = BMK_benchFunction(p, cont->nbLoops);
if (!BMK_isSuccessful_runOutcome(runResult)) { /* error : move out */
return runResult;
}
{ BMK_runTime_t const newRunTime = BMK_extract_runTime(runResult);
double const loopDuration_ns = newRunTime.nanoSecPerRun * cont->nbLoops;
cont->timeSpent_ns += (unsigned long long)loopDuration_ns;
/* estimate nbLoops for next run to last approximately 1 second */
if (loopDuration_ns > (runBudget_ns / 50)) {
double const fastestRun_ns = MIN(bestRunTime.nanoSecPerRun, newRunTime.nanoSecPerRun);
cont->nbLoops = (unsigned)(runBudget_ns / fastestRun_ns) + 1;
} else {
/* previous run was too short : blindly increase workload by x multiplier */
const unsigned multiplier = 10;
assert(cont->nbLoops < ((unsigned)-1) / multiplier); /* avoid overflow */
cont->nbLoops *= multiplier;
}
if (loopDuration_ns < runTimeMin_ns) {
/* When benchmark run time is too small : don't report results.
* increased risks of rounding errors */
continue;
}
if (newRunTime.nanoSecPerRun < bestRunTime.nanoSecPerRun) {
bestRunTime = newRunTime;
}
}
break;
} /* while (!completed) */
return BMK_setValid_runTime(bestRunTime);
}

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/*
* Copyright (C) 2016-2021 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.
*/
/* benchfn :
* benchmark any function on a set of input
* providing result in nanoSecPerRun
* or detecting and returning an error
*/
#if defined (__cplusplus)
extern "C" {
#endif
#ifndef BENCH_FN_H_23876
#define BENCH_FN_H_23876
/* === Dependencies === */
#include <stddef.h> /* size_t */
/* ==== Benchmark any function, iterated on a set of blocks ==== */
/* BMK_runTime_t: valid result return type */
typedef struct {
double nanoSecPerRun; /* time per iteration (over all blocks) */
size_t sumOfReturn; /* sum of return values */
} BMK_runTime_t;
/* BMK_runOutcome_t:
* type expressing the outcome of a benchmark run by BMK_benchFunction(),
* which can be either valid or invalid.
* benchmark outcome can be invalid if errorFn is provided.
* BMK_runOutcome_t must be considered "opaque" : never access its members directly.
* Instead, use its assigned methods :
* BMK_isSuccessful_runOutcome, BMK_extract_runTime, BMK_extract_errorResult.
* The structure is only described here to allow its allocation on stack. */
typedef struct {
BMK_runTime_t internal_never_ever_use_directly;
size_t error_result_never_ever_use_directly;
int error_tag_never_ever_use_directly;
} BMK_runOutcome_t;
/* prototypes for benchmarked functions */
typedef size_t (*BMK_benchFn_t)(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload);
typedef size_t (*BMK_initFn_t)(void* initPayload);
typedef unsigned (*BMK_errorFn_t)(size_t);
/* BMK_benchFunction() parameters are provided via the following structure.
* A structure is preferable for readability,
* as the number of parameters required is fairly large.
* No initializer is provided, because it doesn't make sense to provide some "default" :
* all parameters must be specified by the caller.
* optional parameters are labelled explicitly, and accept value NULL when not used */
typedef struct {
BMK_benchFn_t benchFn; /* the function to benchmark, over the set of blocks */
void* benchPayload; /* pass custom parameters to benchFn :
* (*benchFn)(srcBuffers[i], srcSizes[i], dstBuffers[i], dstCapacities[i], benchPayload) */
BMK_initFn_t initFn; /* (*initFn)(initPayload) is run once per run, at the beginning. */
void* initPayload; /* Both arguments can be NULL, in which case nothing is run. */
BMK_errorFn_t errorFn; /* errorFn will check each return value of benchFn over each block, to determine if it failed or not.
* errorFn can be NULL, in which case no check is performed.
* errorFn must return 0 when benchFn was successful, and >= 1 if it detects an error.
* Execution is stopped as soon as an error is detected.
* the triggering return value can be retrieved using BMK_extract_errorResult(). */
size_t blockCount; /* number of blocks to operate benchFn on.
* It's also the size of all array parameters :
* srcBuffers, srcSizes, dstBuffers, dstCapacities, blockResults */
const void *const * srcBuffers; /* read-only array of buffers to be operated on by benchFn */
const size_t* srcSizes; /* read-only array containing sizes of srcBuffers */
void *const * dstBuffers; /* array of buffers to be written into by benchFn. This array is not optional, it must be provided even if unused by benchfn. */
const size_t* dstCapacities; /* read-only array containing capacities of dstBuffers. This array must be present. */
size_t* blockResults; /* Optional: store the return value of benchFn for each block. Use NULL if this result is not requested. */
} BMK_benchParams_t;
/* BMK_benchFunction() :
* This function benchmarks benchFn and initFn, providing a result.
*
* params : see description of BMK_benchParams_t above.
* nbLoops: defines number of times benchFn is run over the full set of blocks.
* Minimum value is 1. A 0 is interpreted as a 1.
*
* @return: can express either an error or a successful result.
* Use BMK_isSuccessful_runOutcome() to check if benchmark was successful.
* If yes, extract the result with BMK_extract_runTime(),
* it will contain :
* .sumOfReturn : the sum of all return values of benchFn through all of blocks
* .nanoSecPerRun : time per run of benchFn + (time for initFn / nbLoops)
* .sumOfReturn is generally intended for functions which return a # of bytes written into dstBuffer,
* in which case, this value will be the total amount of bytes written into dstBuffer.
*
* blockResults : when provided (!= NULL), and when benchmark is successful,
* params.blockResults contains all return values of `benchFn` over all blocks.
* when provided (!= NULL), and when benchmark failed,
* params.blockResults contains return values of `benchFn` over all blocks preceding and including the failed block.
*/
BMK_runOutcome_t BMK_benchFunction(BMK_benchParams_t params, unsigned nbLoops);
/* check first if the benchmark was successful or not */
int BMK_isSuccessful_runOutcome(BMK_runOutcome_t outcome);
/* If the benchmark was successful, extract the result.
* note : this function will abort() program execution if benchmark failed !
* always check if benchmark was successful first !
*/
BMK_runTime_t BMK_extract_runTime(BMK_runOutcome_t outcome);
/* when benchmark failed, it means one invocation of `benchFn` failed.
* The failure was detected by `errorFn`, operating on return values of `benchFn`.
* Returns the faulty return value.
* note : this function will abort() program execution if benchmark did not failed.
* always check if benchmark failed first !
*/
size_t BMK_extract_errorResult(BMK_runOutcome_t outcome);
/* ==== Benchmark any function, returning intermediate results ==== */
/* state information tracking benchmark session */
typedef struct BMK_timedFnState_s BMK_timedFnState_t;
/* BMK_benchTimedFn() :
* Similar to BMK_benchFunction(), most arguments being identical.
* Automatically determines `nbLoops` so that each result is regularly produced at interval of about run_ms.
* Note : minimum `nbLoops` is 1, therefore a run may last more than run_ms, and possibly even more than total_ms.
* Usage - initialize timedFnState, select benchmark duration (total_ms) and each measurement duration (run_ms)
* call BMK_benchTimedFn() repetitively, each measurement is supposed to last about run_ms
* Check if total time budget is spent or exceeded, using BMK_isCompleted_TimedFn()
*/
BMK_runOutcome_t BMK_benchTimedFn(BMK_timedFnState_t* timedFnState,
BMK_benchParams_t params);
/* Tells if duration of all benchmark runs has exceeded total_ms
*/
int BMK_isCompleted_TimedFn(const BMK_timedFnState_t* timedFnState);
/* BMK_createTimedFnState() and BMK_resetTimedFnState() :
* Create/Set BMK_timedFnState_t for next benchmark session,
* which shall last a minimum of total_ms milliseconds,
* producing intermediate results, paced at interval of (approximately) run_ms.
*/
BMK_timedFnState_t* BMK_createTimedFnState(unsigned total_ms, unsigned run_ms);
void BMK_resetTimedFnState(BMK_timedFnState_t* timedFnState, unsigned total_ms, unsigned run_ms);
void BMK_freeTimedFnState(BMK_timedFnState_t* state);
/* BMK_timedFnState_shell and BMK_initStatic_timedFnState() :
* Makes it possible to statically allocate a BMK_timedFnState_t on stack.
* BMK_timedFnState_shell is only there to allocate space,
* never ever access its members.
* BMK_timedFnState_t() actually accepts any buffer.
* It will check if provided buffer is large enough and is correctly aligned,
* and will return NULL if conditions are not respected.
*/
#define BMK_TIMEDFNSTATE_SIZE 64
typedef union {
char never_access_space[BMK_TIMEDFNSTATE_SIZE];
long long alignment_enforcer; /* must be aligned on 8-bytes boundaries */
} BMK_timedFnState_shell;
BMK_timedFnState_t* BMK_initStatic_timedFnState(void* buffer, size_t size, unsigned total_ms, unsigned run_ms);
#endif /* BENCH_FN_H_23876 */
#if defined (__cplusplus)
}
#endif

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/*
* CSV Display module for the hash benchmark program
* Part of the xxHash project
* Copyright (C) 2019-2021 Yann Collet
*
* 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 :
* - xxHash homepage : https://www.xxhash.com
* - xxHash source repository : https://github.com/Cyan4973/xxHash
*/
/* === Dependencies === */
#include <stdlib.h> /* rand */
#include <stdio.h> /* printf */
#include <assert.h>
#include "benchHash.h"
#include "bhDisplay.h"
/* === benchmark large input === */
#define MB_UNIT 1000000
#define BENCH_LARGE_ITER_MS 490
#define BENCH_LARGE_TOTAL_MS 1010
static void bench_oneHash_largeInput(Bench_Entry hashDesc, int minlog, int maxlog)
{
printf("%-7s", hashDesc.name);
for (int sizelog=minlog; sizelog<=maxlog; sizelog++) {
size_t const inputSize = (size_t)1 << sizelog;
double const nbhps = bench_hash(hashDesc.hash, BMK_throughput,
inputSize, BMK_fixedSize,
BENCH_LARGE_TOTAL_MS, BENCH_LARGE_ITER_MS);
printf(",%6.0f", nbhps * inputSize / MB_UNIT); fflush(NULL);
}
printf("\n");
}
void bench_largeInput(Bench_Entry const* hashDescTable, int nbHashes, int minlog, int maxlog)
{
assert(maxlog < 31);
assert(minlog >= 0);
printf("benchmarking large inputs : from %u bytes (log%i) to %u MB (log%i) \n",
1U << minlog, minlog,
(1U << maxlog) >> 20, maxlog);
for (int i=0; i<nbHashes; i++)
bench_oneHash_largeInput(hashDescTable[i], minlog, maxlog);
}
/* === Benchmark small inputs === */
#define BENCH_SMALL_ITER_MS 170
#define BENCH_SMALL_TOTAL_MS 490
static void bench_throughput_oneHash_smallInputs(Bench_Entry hashDesc, size_t sizeMin, size_t sizeMax)
{
printf("%-7s", hashDesc.name);
for (size_t s=sizeMin; s<sizeMax+1; s++) {
double const nbhps = bench_hash(hashDesc.hash, BMK_throughput,
s, BMK_fixedSize,
BENCH_SMALL_TOTAL_MS, BENCH_SMALL_ITER_MS);
printf(",%10.0f", nbhps); fflush(NULL);
}
printf("\n");
}
void bench_throughput_smallInputs(Bench_Entry const* hashDescTable, int nbHashes, size_t sizeMin, size_t sizeMax)
{
printf("Throughput small inputs of fixed size (from %zu to %zu bytes): \n",
sizeMin, sizeMax);
for (int i=0; i<nbHashes; i++)
bench_throughput_oneHash_smallInputs(hashDescTable[i], sizeMin, sizeMax);
}
/* === Latency measurements (small keys) === */
static void bench_latency_oneHash_smallInputs(Bench_Entry hashDesc, size_t size_min, size_t size_max)
{
printf("%-7s", hashDesc.name);
for (size_t s=size_min; s<size_max+1; s++) {
double const nbhps = bench_hash(hashDesc.hash, BMK_latency,
s, BMK_fixedSize,
BENCH_SMALL_TOTAL_MS, BENCH_SMALL_ITER_MS);
printf(",%10.0f", nbhps); fflush(NULL);
}
printf("\n");
}
void bench_latency_smallInputs(Bench_Entry const* hashDescTable, int nbHashes, size_t size_min, size_t size_max)
{
printf("Latency for small inputs of fixed size : \n");
for (int i=0; i<nbHashes; i++)
bench_latency_oneHash_smallInputs(hashDescTable[i], size_min, size_max);
}
/* === Random input Length === */
static void bench_randomInputLength_withOneHash(Bench_Entry hashDesc, size_t size_min, size_t size_max)
{
printf("%-7s", hashDesc.name);
for (size_t s=size_min; s<size_max+1; s++) {
srand((unsigned)s); /* ensure random sequence of length will be the same for a given s */
double const nbhps = bench_hash(hashDesc.hash, BMK_throughput,
s, BMK_randomSize,
BENCH_SMALL_TOTAL_MS, BENCH_SMALL_ITER_MS);
printf(",%10.0f", nbhps); fflush(NULL);
}
printf("\n");
}
void bench_throughput_randomInputLength(Bench_Entry const* hashDescTable, int nbHashes, size_t size_min, size_t size_max)
{
printf("benchmarking random size inputs [1-N] : \n");
for (int i=0; i<nbHashes; i++)
bench_randomInputLength_withOneHash(hashDescTable[i], size_min, size_max);
}
/* === Latency with Random input Length === */
static void bench_latency_oneHash_randomInputLength(Bench_Entry hashDesc, size_t size_min, size_t size_max)
{
printf("%-7s", hashDesc.name);
for (size_t s=size_min; s<size_max+1; s++) {
srand((unsigned)s); /* ensure random sequence of length will be the same for a given s */
double const nbhps = bench_hash(hashDesc.hash, BMK_latency,
s, BMK_randomSize,
BENCH_SMALL_TOTAL_MS, BENCH_SMALL_ITER_MS);
printf(",%10.0f", nbhps); fflush(NULL);
}
printf("\n");
}
void bench_latency_randomInputLength(Bench_Entry const* hashDescTable, int nbHashes, size_t size_min, size_t size_max)
{
printf("Latency for small inputs of random size [1-N] : \n");
for (int i=0; i<nbHashes; i++)
bench_latency_oneHash_randomInputLength(hashDescTable[i], size_min, size_max);
}

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/*
* CSV Display module for the hash benchmark program
* Part of the xxHash project
* Copyright (C) 2019-2021 Yann Collet
*
* 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:
* - xxHash homepage: https://www.xxhash.com
* - xxHash source repository: https://github.com/Cyan4973/xxHash
*/
#ifndef BH_DISPLAY_H_192088098
#define BH_DISPLAY_H_192088098
#if defined (__cplusplus)
extern "C" {
#endif
/* === Dependencies === */
#include "benchfn.h" /* BMK_benchFn_t */
/* === Declarations === */
typedef struct {
const char* name;
BMK_benchFn_t hash;
} Bench_Entry;
void bench_largeInput(Bench_Entry const* hashDescTable, int nbHashes, int sizeLogMin, int sizeLogMax);
void bench_throughput_smallInputs(Bench_Entry const* hashDescTable, int nbHashes, size_t sizeMin, size_t sizeMax);
void bench_throughput_randomInputLength(Bench_Entry const* hashDescTable, int nbHashes, size_t sizeMin, size_t sizeMax);
void bench_latency_smallInputs(Bench_Entry const* hashDescTable, int nbHashes, size_t sizeMin, size_t sizeMax);
void bench_latency_randomInputLength(Bench_Entry const* hashDescTable, int nbHashes, size_t sizeMin, size_t sizeMax);
#if defined (__cplusplus)
}
#endif
#endif /* BH_DISPLAY_H_192088098 */

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/*
* List hash algorithms to benchmark
* Part of xxHash project
* Copyright (C) 2019-2021 Yann Collet
*
* 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:
* - xxHash homepage: https://www.xxhash.com
* - xxHash source repository: https://github.com/Cyan4973/xxHash
*/
/* === Dependencies === */
#include <stddef.h> /* size_t */
/* ==================================================
* Non-portable hash algorithms
* =============================================== */
#ifdef HARDWARE_SUPPORT
/*
* List any hash algorithms that depend on specific hardware support,
* including for example:
* - Hardware crc32c
* - Hardware AES support
* - Carryless Multipliers (clmul)
* - AVX2
*/
#endif
/* ==================================================
* List of hashes
* ==================================================
* Each hash must be wrapped in a thin redirector conformant with the BMK_benchfn_t.
* BMK_benchfn_t is generic, not specifically designed for hashes.
* For hashes, the following parameters are expected to be useless:
* dst, dstCapacity, customPayload.
*
* The result of each hash is assumed to be provided as function return value.
* This condition is important for latency measurements.
*/
/* === xxHash === */
#define XXH_INLINE_ALL
#include "xxhash.h"
size_t XXH32_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
{
(void)dst; (void)dstCapacity; (void)customPayload;
return (size_t) XXH32(src, srcSize, 0);
}
size_t XXH64_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
{
(void)dst; (void)dstCapacity; (void)customPayload;
return (size_t) XXH64(src, srcSize, 0);
}
size_t xxh3_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
{
(void)dst; (void)dstCapacity; (void)customPayload;
return (size_t) XXH3_64bits(src, srcSize);
}
size_t XXH128_wrapper(const void* src, size_t srcSize, void* dst, size_t dstCapacity, void* customPayload)
{
(void)dst; (void)dstCapacity; (void)customPayload;
return (size_t) XXH3_128bits(src, srcSize).low64;
}
/* ==================================================
* Table of hashes
* =============================================== */
#include "bhDisplay.h" /* Bench_Entry */
#ifndef HARDWARE_SUPPORT
# define NB_HASHES 4
#else
# define NB_HASHES 4
#endif
Bench_Entry const hashCandidates[NB_HASHES] = {
{ "xxh3" , xxh3_wrapper },
{ "XXH32" , XXH32_wrapper },
{ "XXH64" , XXH64_wrapper },
{ "XXH128", XXH128_wrapper },
#ifdef HARDWARE_SUPPORT
/* list here codecs which require specific hardware support, such SSE4.1, PCLMUL, AVX2, etc. */
#endif
};

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/*
* Main program to benchmark hash functions
* Part of the xxHash project
* Copyright (C) 2019-2021 Yann Collet
* 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:
* - xxHash homepage: https://www.xxhash.com
* - xxHash source repository: https://github.com/Cyan4973/xxHash
*/
/* === dependencies === */
#include <stdio.h> /* printf */
#include <limits.h> /* INT_MAX */
#include "bhDisplay.h" /* bench_x */
/* === defines list of hashes `hashCandidates` and NB_HASHES *** */
#include "hashes.h"
/* === parse command line === */
#undef NDEBUG
#include <assert.h>
/*!
* readIntFromChar():
* Allows and interprets K, KB, KiB, M, MB and MiB suffix.
* Will also modify `*stringPtr`, advancing it to position where it stopped reading.
*/
static int readIntFromChar(const char** stringPtr)
{
static int const max = (INT_MAX / 10) - 1;
int result = 0;
while ((**stringPtr >='0') && (**stringPtr <='9')) {
assert(result < max);
result *= 10;
result += (unsigned)(**stringPtr - '0');
(*stringPtr)++ ;
}
if ((**stringPtr=='K') || (**stringPtr=='M')) {
int const maxK = INT_MAX >> 10;
assert(result < maxK);
result <<= 10;
if (**stringPtr=='M') {
assert(result < maxK);
result <<= 10;
}
(*stringPtr)++; /* skip `K` or `M` */
if (**stringPtr=='i') (*stringPtr)++;
if (**stringPtr=='B') (*stringPtr)++;
}
return result;
}
/**
* isCommand():
* Checks if string is the same as longCommand.
* If yes, @return 1, otherwise @return 0
*/
static int isCommand(const char* string, const char* longCommand)
{
assert(string);
assert(longCommand);
size_t const comSize = strlen(longCommand);
return !strncmp(string, longCommand, comSize);
}
/*
* longCommandWArg():
* Checks if *stringPtr is the same as longCommand.
* If yes, @return 1 and advances *stringPtr to the position which immediately
* follows longCommand.
* @return 0 and doesn't modify *stringPtr otherwise.
*/
static int longCommandWArg(const char** stringPtr, const char* longCommand)
{
assert(stringPtr);
assert(longCommand);
size_t const comSize = strlen(longCommand);
int const result = isCommand(*stringPtr, longCommand);
if (result) *stringPtr += comSize;
return result;
}
/* === default values - can be redefined at compilation time === */
#ifndef SMALL_SIZE_MIN_DEFAULT
# define SMALL_SIZE_MIN_DEFAULT 1
#endif
#ifndef SMALL_SIZE_MAX_DEFAULT
# define SMALL_SIZE_MAX_DEFAULT 127
#endif
#ifndef LARGE_SIZELOG_MIN_DEFAULT
# define LARGE_SIZELOG_MIN_DEFAULT 9
#endif
#ifndef LARGE_SIZELOG_MAX_DEFAULT
# define LARGE_SIZELOG_MAX_DEFAULT 27
#endif
static int display_hash_names(void)
{
int i;
printf("available hashes : \n");
for (i=0; i<NB_HASHES; i++) {
printf("%s, ", hashCandidates[i].name);
}
printf("\b\b \n");
return 0;
}
/*
* @return: hashID (necessarily between 0 and NB_HASHES) if present
* -1 on error (hname not present)
*/
static int hashID(const char* hname)
{
int id;
assert(hname);
for (id=0; id < NB_HASHES; id++) {
assert(hashCandidates[id].name);
if (strlen(hname) != strlen(hashCandidates[id].name)) continue;
if (isCommand(hname, hashCandidates[id].name)) return id;
}
return -1;
}
static int help(const char* exename)
{
printf("Usage: %s [options]... [hash]\n", exename);
printf("Runs various benchmarks at various lengths for the listed hash functions\n");
printf("and outputs them in a CSV format.\n\n");
printf("Options: \n");
printf(" --list Name available hash algorithms and exit \n");
printf(" --mins=LEN Starting length for small size bench (default: %i) \n", SMALL_SIZE_MIN_DEFAULT);
printf(" --maxs=LEN End length for small size bench (default: %i) \n", SMALL_SIZE_MAX_DEFAULT);
printf(" --minl=LEN Starting log2(length) for large size bench (default: %i) \n", LARGE_SIZELOG_MIN_DEFAULT);
printf(" --maxl=LEN End log2(length) for large size bench (default: %i) \n", LARGE_SIZELOG_MAX_DEFAULT);
printf(" [hash] Optional, bench all available hashes if not provided \n");
return 0;
}
static int badusage(const char* exename)
{
printf("Bad command ... \n");
help(exename);
return 1;
}
int main(int argc, const char* argv[])
{
const char* const exename = argv[0];
int hashNb = 0;
int nb_h_test = NB_HASHES;
int largeTest_log_min = LARGE_SIZELOG_MIN_DEFAULT;
int largeTest_log_max = LARGE_SIZELOG_MAX_DEFAULT;
size_t smallTest_size_min = SMALL_SIZE_MIN_DEFAULT;
size_t smallTest_size_max = SMALL_SIZE_MAX_DEFAULT;
int arg_nb;
for (arg_nb = 1; arg_nb < argc; arg_nb++) {
const char** arg = argv + arg_nb;
if (isCommand(*arg, "-h")) { assert(argc >= 1); return help(exename); }
if (isCommand(*arg, "--list")) { return display_hash_names(); }
if (longCommandWArg(arg, "--n=")) { nb_h_test = readIntFromChar(arg); continue; } /* hidden command */
if (longCommandWArg(arg, "--minl=")) { largeTest_log_min = readIntFromChar(arg); continue; }
if (longCommandWArg(arg, "--maxl=")) { largeTest_log_max = readIntFromChar(arg); continue; }
if (longCommandWArg(arg, "--mins=")) { smallTest_size_min = (size_t)readIntFromChar(arg); continue; }
if (longCommandWArg(arg, "--maxs=")) { smallTest_size_max = (size_t)readIntFromChar(arg); continue; }
/* not a command: must be a hash name */
hashNb = hashID(*arg);
if (hashNb >= 0) {
nb_h_test = 1;
} else {
/* not a hash name: error */
return badusage(exename);
}
}
/* border case (requires (mis)using hidden command `--n=#`) */
if (hashNb + nb_h_test > NB_HASHES) {
printf("wrong hash selection \n");
return 1;
}
printf(" === benchmarking %i hash functions === \n", nb_h_test);
if (largeTest_log_max >= largeTest_log_min) {
bench_largeInput(hashCandidates+hashNb, nb_h_test, largeTest_log_min, largeTest_log_max);
}
if (smallTest_size_max >= smallTest_size_min) {
bench_throughput_smallInputs(hashCandidates+hashNb, nb_h_test, smallTest_size_min, smallTest_size_max);
bench_throughput_randomInputLength(hashCandidates+hashNb, nb_h_test, smallTest_size_min, smallTest_size_max);
bench_latency_smallInputs(hashCandidates+hashNb, nb_h_test, smallTest_size_min, smallTest_size_max);
bench_latency_randomInputLength(hashCandidates+hashNb, nb_h_test, smallTest_size_min, smallTest_size_max);
}
return 0;
}

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/*
* Copyright (C) 2019-2021 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.
*/
/* === Dependencies === */
#include "timefn.h"
/*-****************************************
* Time functions
******************************************/
#if defined(_WIN32) /* Windows */
#include <stdlib.h> /* abort */
#include <stdio.h> /* perror */
UTIL_time_t UTIL_getTime(void) { UTIL_time_t x; QueryPerformanceCounter(&x); return x; }
PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
{
static LARGE_INTEGER ticksPerSecond;
static int init = 0;
if (!init) {
if (!QueryPerformanceFrequency(&ticksPerSecond)) {
perror("timefn::QueryPerformanceFrequency");
abort();
}
init = 1;
}
return 1000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
}
PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
{
static LARGE_INTEGER ticksPerSecond;
static int init = 0;
if (!init) {
if (!QueryPerformanceFrequency(&ticksPerSecond)) {
perror("timefn::QueryPerformanceFrequency");
abort();
}
init = 1;
}
return 1000000000ULL*(clockEnd.QuadPart - clockStart.QuadPart)/ticksPerSecond.QuadPart;
}
#elif defined(__APPLE__) && defined(__MACH__)
UTIL_time_t UTIL_getTime(void) { return mach_absolute_time(); }
PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd)
{
static mach_timebase_info_data_t rate;
static int init = 0;
if (!init) {
mach_timebase_info(&rate);
init = 1;
}
return (((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom))/1000ULL;
}
PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd)
{
static mach_timebase_info_data_t rate;
static int init = 0;
if (!init) {
mach_timebase_info(&rate);
init = 1;
}
return ((clockEnd - clockStart) * (PTime)rate.numer) / ((PTime)rate.denom);
}
#elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \
&& defined(TIME_UTC) /* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance */
#include <stdlib.h> /* abort */
#include <stdio.h> /* perror */
UTIL_time_t UTIL_getTime(void)
{
/* time must be initialized, othersize it may fail msan test.
* No good reason, likely a limitation of timespec_get() for some target */
UTIL_time_t time = UTIL_TIME_INITIALIZER;
if (timespec_get(&time, TIME_UTC) != TIME_UTC) {
perror("timefn::timespec_get");
abort();
}
return time;
}
static UTIL_time_t UTIL_getSpanTime(UTIL_time_t begin, UTIL_time_t end)
{
UTIL_time_t diff;
if (end.tv_nsec < begin.tv_nsec) {
diff.tv_sec = (end.tv_sec - 1) - begin.tv_sec;
diff.tv_nsec = (end.tv_nsec + 1000000000ULL) - begin.tv_nsec;
} else {
diff.tv_sec = end.tv_sec - begin.tv_sec;
diff.tv_nsec = end.tv_nsec - begin.tv_nsec;
}
return diff;
}
PTime UTIL_getSpanTimeMicro(UTIL_time_t begin, UTIL_time_t end)
{
UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
PTime micro = 0;
micro += 1000000ULL * diff.tv_sec;
micro += diff.tv_nsec / 1000ULL;
return micro;
}
PTime UTIL_getSpanTimeNano(UTIL_time_t begin, UTIL_time_t end)
{
UTIL_time_t const diff = UTIL_getSpanTime(begin, end);
PTime nano = 0;
nano += 1000000000ULL * diff.tv_sec;
nano += diff.tv_nsec;
return nano;
}
#else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */
UTIL_time_t UTIL_getTime(void) { return clock(); }
PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd) { return 1000000000ULL * (clockEnd - clockStart) / CLOCKS_PER_SEC; }
#endif
/* returns time span in microseconds */
PTime UTIL_clockSpanMicro(UTIL_time_t clockStart )
{
UTIL_time_t const clockEnd = UTIL_getTime();
return UTIL_getSpanTimeMicro(clockStart, clockEnd);
}
/* returns time span in microseconds */
PTime UTIL_clockSpanNano(UTIL_time_t clockStart )
{
UTIL_time_t const clockEnd = UTIL_getTime();
return UTIL_getSpanTimeNano(clockStart, clockEnd);
}
void UTIL_waitForNextTick(void)
{
UTIL_time_t const clockStart = UTIL_getTime();
UTIL_time_t clockEnd;
do {
clockEnd = UTIL_getTime();
} while (UTIL_getSpanTimeNano(clockStart, clockEnd) == 0);
}

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/*
* Copyright (c) 2016-2021 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.
*/
#ifndef TIME_FN_H_MODULE_287987
#define TIME_FN_H_MODULE_287987
#if defined (__cplusplus)
extern "C" {
#endif
/*-****************************************
* Dependencies
******************************************/
#include <sys/types.h> /* utime */
#if defined(_MSC_VER)
# include <sys/utime.h> /* utime */
#else
# include <utime.h> /* utime */
#endif
#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */
/*-****************************************
* Local Types
******************************************/
#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
# include <stdint.h>
typedef uint64_t PTime; /* Precise Time */
#else
typedef unsigned long long PTime; /* does not support compilers without long long support */
#endif
/*-****************************************
* Time functions
******************************************/
#if defined(_WIN32) /* Windows */
#include <Windows.h> /* LARGE_INTEGER */
typedef LARGE_INTEGER UTIL_time_t;
#define UTIL_TIME_INITIALIZER { { 0, 0 } }
#elif defined(__APPLE__) && defined(__MACH__)
#include <mach/mach_time.h>
typedef PTime UTIL_time_t;
#define UTIL_TIME_INITIALIZER 0
#elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \
&& defined(TIME_UTC) /* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance */
typedef struct timespec UTIL_time_t;
#define UTIL_TIME_INITIALIZER { 0, 0 }
#else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */
typedef clock_t UTIL_time_t;
#define UTIL_TIME_INITIALIZER 0
#endif
UTIL_time_t UTIL_getTime(void);
PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd);
PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd);
#define SEC_TO_MICRO ((PTime)1000000)
PTime UTIL_clockSpanMicro(UTIL_time_t clockStart);
PTime UTIL_clockSpanNano(UTIL_time_t clockStart);
void UTIL_waitForNextTick(void);
#if defined (__cplusplus)
}
#endif
#endif /* TIME_FN_H_MODULE_287987 */