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time_.h
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time_.h
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/**
Copyright (C) powturbo 2013-2023
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.
- homepage : https://sites.google.com/site/powturbo/
- github : https://github.com/powturbo
- twitter : https://twitter.com/powturbo
- email : powturbo [_AT_] gmail [_DOT_] com
**/
// time_.h : parameter free high precision time/benchmark functions
#include <time.h>
#include <float.h>
#ifdef _WIN32
#include <windows.h>
#ifndef sleep
#define sleep(n) Sleep((n) * 1000)
#endif
#define uint64_t unsigned __int64
#else
#include <stdint.h>
#include <unistd.h>
#define Sleep(ms) usleep((ms) * 1000)
#endif
#if defined (__i386__) || defined( __x86_64__ ) // ------------------ rdtsc --------------------------
#ifdef _MSC_VER
#include <intrin.h> // __rdtsc
#else
#include <x86intrin.h>
#endif
#ifdef __corei7__
#define RDTSC_INI(_c_) do { unsigned _cl, _ch; \
__asm volatile ("cpuid\n\t" \
"rdtsc\n\t" \
"mov %%edx, %0\n" \
"mov %%eax, %1\n": "=r" (_ch), "=r" (_cl):: \
"%rax", "%rbx", "%rcx", "%rdx"); \
_c_ = (uint64_t)_ch << 32 | _cl; \
} while(0)
#define RDTSC(_c_) do { unsigned _cl, _ch; \
__asm volatile("rdtscp\n" \
"mov %%edx, %0\n" \
"mov %%eax, %1\n" \
"cpuid\n\t": "=r" (_ch), "=r" (_cl):: "%rax",\
"%rbx", "%rcx", "%rdx");\
_c_ = (uint64_t)_ch << 32 | _cl;\
} while(0)
#else
/*#define RDTSC(_c_) do { unsigned _cl, _ch;\
__asm volatile ("cpuid \n"\
"rdtsc"\
: "=a"(_cl), "=d"(_ch)\
: "a"(0)\
: "%ebx", "%ecx");\
_c_ = (uint64_t)_ch << 32 | _cl;\
} while(0)*/
#define RDTSC(_c_) do { unsigned _cl, _ch;\
__asm volatile("rdtsc" : "=a"(_cl), "=d"(_ch) );\
_c_ = (uint64_t)_ch << 32 | _cl;\
} while(0)
#endif
#define RDTSC_INI(_c_) RDTSC(_c_)
#else // ------------------ time --------------------------
#define RDTSC_INI(_c_)
#define RDTSC(_c_)
#endif
#ifndef TM_F
#define TM_F 1.0 // TM_F=4 -> MI/s
#endif
#ifdef _RDTSC //---------------------- rdtsc --------------------------------
#define TM_M (CLOCKS_PER_SEC*1000000ull)
#define TM_PRE 4
#define TM_MBS "cycle/byte"
static double TMBS(unsigned long long l, double t) { return (double)t/(double)l; }
typedef uint64_t tm_t;
static tm_t tmtime() { uint64_t c; RDTSC(c); return c; }
static tm_t tminit() { uint64_t c; __asm volatile("" ::: "memory"); RDTSC_INI(c); return c; }
static double tmdiff(tm_t start, tm_t stop) { return (double)(stop - start); }
static int tmiszero(tm_t t) { return !t; }
#else //---------------------- time -----------------------------------
#define TM_M 1
#define TM_PRE 2
#define TM_MBS "MB/s"
static double TMBS(unsigned long long l, double t) { return (l/t)/1000000.0; }
#ifdef _WIN32 //-------- windows
static LARGE_INTEGER tps;
typedef unsigned __int64 tm_t;
static tm_t tmtime() { LARGE_INTEGER tm; tm_t t; QueryPerformanceCounter(&tm); return tm.QuadPart; }
static tm_t tminit() { tm_t t0,ts; QueryPerformanceFrequency(&tps); t0 = tmtime(); while((ts = tmtime())==t0) {}; return ts; }
static double tmdiff(tm_t start, tm_t stop) { return (double)(stop - start)/tps.QuadPart; }
static int tmiszero(tm_t t) { return !t; }
#else // Linux & compatible / MacOS
#ifdef __APPLE__
#include <AvailabilityMacros.h>
#ifndef MAC_OS_X_VERSION_10_12
#define MAC_OS_X_VERSION_10_12 101200
#endif
#define CIVETWEB_APPLE_HAVE_CLOCK_GETTIME (defined(__APPLE__) && defined(MAC_OS_X_VERSION_MIN_REQUIRED) && MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_12)
#if !(CIVETWEB_APPLE_HAVE_CLOCK_GETTIME)
#include <sys/time.h>
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 0
int clock_gettime(int /*clk_id*/, struct timespec* t) {
struct timeval now;
int rv = gettimeofday(&now, NULL);
if (rv) return rv;
t->tv_sec = now.tv_sec;
t->tv_nsec = now.tv_usec * 1000;
return 0;
}
#endif
#endif
typedef struct timespec tm_t;
static tm_t tmtime() { struct timespec tm; clock_gettime(CLOCK_MONOTONIC, &tm); return tm; }
static double tmdiff(tm_t start, tm_t stop) { return (stop.tv_sec - start.tv_sec) + (double)(stop.tv_nsec - start.tv_nsec)/1e9f; }
static tm_t tminit() { tm_t t0 = tmtime(),t; while(!tmdiff(t = tmtime(),t0)) {}; return t; }
static int tmiszero(tm_t t) { return !(t.tv_sec|t.tv_nsec); }
#endif
#endif
//---------------------------------------- bench ----------------------------------------------------------------------
// for each a function call is repeated until exceeding tm_tx seconds.
// A run duration is always tm_tx seconds
// The number of runs can be set with the program options -I and -J (specify -I15 -J15 for more precision)
// sleep after each 8 runs to avoid cpu throttling.
#define TMSLEEP do { tm_T = tmtime(); if(tmiszero(tm_0)) tm_0 = tm_T; else if(tmdiff(tm_0, tm_T) > tm_TX) { if(tm_verbose>2) { printf("S \b\b");fflush(stdout); } sleep(tm_slp); tm_0=tmtime();} } while(0)
// benchmark loop
#define TMBEG(_tm_Reps_) { unsigned _tm_r,_tm_c = 0,_tm_R,_tm_Rx = _tm_Reps_,_tm_Rn = _tm_Reps_; double _tm_t;\
for(tm_rm = tm_rep, tm_tm = DBL_MAX, _tm_R = 0; _tm_R < _tm_Rn; _tm_R++) { tm_t _tm_t0 = tminit(); /*for each run*/\
for(_tm_r = 0;_tm_r < tm_rm;) { /*repeat tm_rm times */
#define TMEND(_size_) ;\
_tm_r++; if(tm_tm == DBL_MAX && (_tm_t = tmdiff(_tm_t0, tmtime())) > tm_tx) break;\
}\
/*1st run: break the loop after tm_tx=1 sec, calculate a new repeats 'tm_rm' to avoid calling time() after each function call*/\
/*other runs: break the loop only after 'tm_rm' repeats */ \
_tm_t = tmdiff(_tm_t0, tmtime());\
/*set min time, recalculate repeats tm_rm based on tm_tx, recalculate number of runs based on tm_TX*/\
if(_tm_t < tm_tm) { if(tm_tm == DBL_MAX) { tm_rm = _tm_r; _tm_Rn = tm_TX/_tm_t; _tm_Rn = _tm_Rn<_tm_Rx?_tm_Rn:_tm_Rx; /*printf("repeats=%u,%u,%.4f ", _tm_Rn, _tm_Rx, _tm_t);*/ } \
tm_tm = _tm_t; _tm_c++;\
} else if(_tm_t > tm_tm*1.15) TMSLEEP;/*force sleep at 15% divergence*/\
if(tm_verbose>2) { printf("%8.*f %2d_%.2d\b\b\b\b\b\b\b\b\b\b\b\b\b\b",TM_PRE, TMBS(_size_, tm_tm/tm_rm),_tm_R+1,_tm_c),fflush(stdout); }\
if((_tm_R & 7)==7) sleep(tm_slp); /*pause 20 secs after each 8 runs to avoid cpu throttling*/\
}\
}
static unsigned tm_rep = 1u<<30, tm_Rep = 3, tm_Rep2 = 3, tm_rm, tm_RepMin = 1, tm_slp = 20, tm_verbose = 3;
static tm_t tm_0, tm_T;
static double tm_tm, tm_tx = 1.0*TM_M, tm_TX = 60.0*TM_M;
static void tm_init(unsigned _tm_Rep, int _tm_verbose) { tm_verbose = _tm_verbose; if(_tm_Rep) tm_Rep = _tm_Rep; }
#define TM(_name_, _efunc_, _size_, _len_, _dfunc_) do {\
TMBEG(tm_Rep) _efunc_; if(_size_ && !(_tm_R|_tm_r) ) pr(_len_,_size_); TMEND(_size_);\
double dm = tm_tm, dr = tm_rm; \
if(tm_verbose>2) printf("%8.*f \b\b\b\b\b", TM_PRE, TMBS(_size_, dm/dr) );\
else if(tm_verbose) printf("%8.*f ", TM_PRE, TMBS(_size_, dm/dr) );\
\
TMBEG(tm_Rep2) _dfunc_; TMEND(_size_);\
dm = tm_tm; dr = tm_rm; if(tm_verbose>2) printf("%8.*f \b\b\b\b\b", TM_PRE,TMBS(_size_, dm/dr) );else if(tm_verbose) printf("%8.*f ", TM_PRE,TMBS(_size_, dm/dr) );\
if(tm_verbose>3) printf("%s ", _name_?_name_:#_efunc_);\
} while(0)
#define TM0(_name_, _efunc_, _size_, _len_) do {\
TMBEG(tm_Rep) _efunc_; if(_size_ && !(_tm_R|_tm_r) ) pr(_len_,_size_); TMEND(_size_);\
double dm = tm_tm, dr = tm_rm; \
if(tm_verbose>2) printf("%8.*f \b\b\b\b\b", TM_PRE, TMBS(_size_, dm/dr) );\
else if(tm_verbose) printf("%8.*f ", TM_PRE, TMBS(_size_, dm/dr) );\
\
if(tm_verbose>3) printf("%s ", _name_?_name_:#_efunc_);\
} while(0)
static void pr(unsigned l, unsigned n) {
double r = (double)l*100.0/n;
if(r>0.1) printf("%10u %6.2f%% ", l, r);
else if(r>0.01) printf("%10u %7.3f%% ", l, r);
else printf("%10u %8.4f%% ", l, r); fflush(stdout);
}
//----------------------------------------------------------------------------------------------------------------------------------
#define Kb (1u<<10)
#define Mb (1u<<20)
#define Gb (1u<<30)
#define KB 1000
#define MB 1000000
#define GB 1000000000
static unsigned argtoi(char *s, unsigned def) {
char *p;
unsigned n = strtol(s, &p, 10),f = 1;
switch(*p) {
case 'K': f = KB; break;
case 'M': f = MB; break;
case 'G': f = GB; break;
case 'k': f = Kb; break;
case 'm': f = Mb; break;
case 'g': f = Gb; break;
case 'B': return n; break;
case 'b': def = 0;
default: if(!def) return n>=32?0xffffffffu:(1u << n); f = def;
}
return n*f;
}
static uint64_t argtol(char *s) {
char *p;
uint64_t n = strtol(s, &p, 10),f=1;
switch(*p) {
case 'K': f = KB; break;
case 'M': f = MB; break;
case 'G': f = GB; break;
case 'k': f = Kb; break;
case 'm': f = Mb; break;
case 'g': f = Gb; break;
case 'B': return n; break;
case 'b': return 1u << n;
default: f = Mb;
}
return n*f;
}
static uint64_t argtot(char *s) {
char *p;
uint64_t n = strtol(s, &p, 10),f=1;
switch(*p) {
case 'h': f = 3600000; break;
case 'm': f = 60000; break;
case 's': f = 1000; break;
case 'M': f = 1; break;
default: f = 1000;
}
return n*f;
}
static void memrcpy(unsigned char *out, unsigned char *in, unsigned n) { unsigned i; for(i = 0; i < n; i++) out[i] = ~in[i]; }