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本文來源電子發燒友社區，作者：李先生，帖子地址：https://bbs.elecfans.com/jishu_2284399_1_1.html

前言

之前我們使用dhrystone和coremark進行了相關的性能測試。這次我們使用whetstone進行測試，該測試關注浮點相關的計算性能。

獲取代碼

http://www.roylongbottom.org.uk/classic_benchmarks.tar.gz

下下載classic_benchmarks.tar.gz文件

解壓文件

將classic_benchmarksclassic_benchmarkssource_codewhetstone復制到工程目錄

projled下

添加代碼

按照上一步將文件復制到工程目錄下后，按照如下方式刷新

可以看到源碼添加到了工程目錄

修改代碼

前面注釋**************************************************************************少了/

注釋掉#include"cpuidh.h"

注釋掉getDetails

刪除whets.txt相關操作

fprintf改為rt_kprintf

Main改為whetstone_main

pout調用時字符串中刪除

浮點數都放大100倍整數打印

詳見后面附錄代碼

在main中調用

intcore_main(intargc,char*argv[]);

whetstone_main(0, 0);

測試

注以下結果放大100倍，整數打印

-O0

-O3

		RT_tiCK_PER_SECOND=1000
		優化等級0	優化等級3
RAM中運行	MWIPS	38.970	44.858

ROM中運行

對比

可以從下網站看看打敗了全國多少網友

http://www.roylongbottom.org.uk/whetstone%20results.htm

附whets.c代碼

/*gcc whets.c cpuidc64.o cpuida64.o -m64 -lrt -lc -lm -o whet
*
*Document: Whets.c
*File Group: Classic Benchmarks
*Creation Date: 6 November 1996
*Revision Date: 6 November 2010 Ubuntu Version for PCs
*
*Title: Whetstone Benchmark in C/C++
*Keywords: WHETSTONE BENCHMARK PERFORMANCE MIPS
* MWIPS MFLOPS
*
*Abstract: C or C++ version of Whetstone one of the
* Classic Numeric Benchmarks with example
* results on P3 to P6 based PCs.
*
*Contributor: roy@roylongbottom.org.uk
*
************************************************************
*
* C/C++ Whetstone Benchmark Single or Double Precision
*
* Original concept Brian Wichmann NPL 1960's
* Original author Harold CurnowCCTA 1972
* Self timing versions Roy Longbottom CCTA 1978/87
* Optimisation control Bangor University 1987/90
* C/C++ Version Roy Longbottom 1996
* Compatibility & timersAl Aburto 1996
*
************************************************************
*
* Official version approved by:
*
* Harold Curnow100421.1615@compuserve.com
*
* Happy 25th birthday Whetstone, 21 November 1997
*
************************************************************
*
* The program normally runs for about 100 seconds
* (adjustable in main - variable duration). This time
* is necessary because of poor PC clock resolution.
* The original concept included such things as a given
* number of subroutine calls and divides which may be
* changed by optimisation. For comparison purposes the
* compiler and level of optimisation should be identified.
*
* This version is set to run for 10 seconds using high
* resolution timer.
*
************************************************************
*
* The original benchmark had a single variable I which
* controlled the running time. Constants with values up
* to 899 were multiplied by I to control the number
* passes for each loop. It was found that large values
* of I could overflow index registers so an extra outer
* loop with a second variable J was added.
*
* Self timing versions were produced during the early
* days. The 1978 changes supplied timings of individual
* loops and these were used later to produce MFLOPS and
* MOPS ratings.
*
* 1987 changes converted the benchmark to Fortran 77
* standards and removed redundant IF statements and
* loops to leave the 8 active loops N1 to N8. Procedure
* P3 was changed to use global variables to avoid over-
* optimisation with the first two statements changed from
* X1=X and Y1=Y to X=Y and Y=Z. A self time calibrating
* version for PCs was also produced, the facility being
* incorporated in this version.
*
* This version has changes to avoid worse than expected
* speed ratings, due to underflow, and facilities to show
* that consistent numeric output is produced with varying
* optimisation levels or versions in different languages.
*
* Some of the procedures produce ever decreasing numbers.
* To avoid problems, variables T and T1 have been changed
* from 0.499975 and 0.50025 to 0.49999975 and 0.50000025.
*
* Each section now has its own double loop. Inner loops
* are run 100 times the loop constants. Calibration
* determines the number of outer loop passes. The
* numeric results produced in the main output are for
* one pass on the outer loop. As underflow problems were
* still likely on a processor 100 times faster than a 100
* MHz Pentium, three sections have T=1.0-T inserted in the
* outer loop to avoid the problem. The two loops avoid
* index register overflows.
*
* The first section is run ten times longer than required
* for accuracy in calculating MFLOPS. This time is divided
* by ten for inclusion in the MWIPS calculations.
*
* Early version has facilities for typing in details of
* the particular run, appended to file whets.txt along
* with the results. This version attemps to obtain these
* automatically.
*
* 2010 Section 4 modified slightly to avoid over optimisation
* by GCC compiler
*
* Roy Longbottomroy@roylongbottom.org.uk
*
************************************************************
*
* Whetstone benchmark results, further details of the
* benchmarks and history are available from:
*
* http://www.roylongbottom.org.uk/whetstone%20results.htm
* http://www.roylongbottom.org.uk/whetstone.htm
*
************************************************************
*
* Source code is available in C/C++, Fortran, Basic and
* Visual Basic in the same format as this version. Pre-
* compiled versions for PCs are also available via C++.
* These comprise optimised and non-optimised versions
* for DOS, Windows and NT. See:
*
* http://www.roylongbottom.org.uk/whetstone%20results.htm
*
************************************************************
*
* Example of initial calibration display (Pentium 100 MHz)
*
* Single Precision C/C++ Whetstone Benchmark
*
* Calibrate
* 0.17 Seconds 1 Passes (x 100)
* 0.77 Seconds 5 Passes (x 100)
* 3.70 Seconds 25 Passes (x 100)
*
* Use 676passes (x 100)
*
* 676 passes are used for an approximate duration of 100
* seconds, providing an initial estimate of a speed rating
* of 67.6 MWIPS.
*
* This is followed by the table of results as below.
* Whetstone SinglePrecision Benchmark in C/C++
*
* Loop content Result MFLOPS MOPS Seconds
*
* N1 floating point -1.12475025653839100 19.971 0.274
* N2 floating point -1.12274754047393800 11.822 3.240
* N3 if then else 1.00000000000000000 11.659 2.530
* N4 fixed point 12.00000000000000000 13.962 6.430
* N5 sin,cos etc. 0.49904659390449520 2.097 11.310
* N6 floating point 0.99999988079071040 3.360 45.750
* N7 assignments 3.00000000000000000 2.415 21.810
* N8 exp,sqrt etc. 0.75110864639282230 1.206 8.790
*
* MWIPS 28.462 100.134
*
*Note different numeric results to single precision. Slight variations
*are normal with different compilers and sometimes optimisation levels.
*
**************************************************************************/
#include /* for sin, exp etc. */
#include /* standard I/O */
#include /* for strcpy - 3 occurrences*/
#include /* for exit - 1 occurrence */
//#include "cpuidh.h"
/*PRECISION PRECISION PRECISION PRECISION PRECISION PRECISION PRECISION*/
/* #define DP */
#ifdef DP
#define SPDP double
#define Precision "Double"
#else
#define SPDP float
#define Precision "Single"
#endif
//#define opt "Opt 3 64 Bit"
void whetstones(long xtra, long x100, int calibrate);
void pa(SPDP e[4], SPDP t, SPDP t2);
void po(SPDP e1[4], long j, long k, long l);
void p3(SPDP *x, SPDP *y, SPDP *z, SPDP t, SPDP t1, SPDP t2);
void pout(char* title, float ops, int type, SPDP checknum,
SPDP time, int calibrate, int section);
static SPDP loop_time[9];
static SPDP loop_mops[9];
static SPDP loop_mflops[9];
static SPDP TimeUsed;
static SPDP mwips;
static char headings[9][18];
static SPDP Check;
static SPDP results[9];
#include "rtthread.h"
doubletheseSecs = 0.0;
doublestartSecs = 0.0;
doublesecs;
int millisecs = 0;
void start_time()
{
startSecs = rt_tick_get()*1.0/RT_TICK_PER_SECOND;
return;
}
void end_time()
{
secs = rt_tick_get()*1.0/RT_TICK_PER_SECOND - startSecs;
millisecs = (int)(1000.0 * secs);
return;
}
int whetstone_main(int argc, char *argv[])
{
int count = 10, calibrate = 1;
long xtra = 1;
int section;
long x100 = 100;
int duration = 10;
///FILE *outfile;
char compiler[80], options[256], general[10][80] = {" "};
char endit[80];
int i;
int nopause = 1;
if (argc > 1)
{
switch (argv[1][0])
{
case 'N':
nopause = 0;
break;
case 'n':
nopause = 0;
break;
}
}
//getDetails();
//for (i=1; i<10; i++)
//{
// rt_kprintf("%sn", configdata[i]);
//}
///local_time();
///rt_kprintf("n");
///rt_kprintf("##########################################n");
///rt_kprintf("%s Precision C Whetstone Benchmark %s, %sn", Precision, opt, timeday);
///outfile = fopen("whets.txt","a+");
///if (outfile == NULL)
///{
/// rt_kprintf ("Cannot open results file nn");
/// rt_kprintf("Press Enter to exitn");
/// i = getchar();
///
/// exit (0);
///}
rt_kprintf("Calibraten");
do
{
TimeUsed=0;
whetstones(xtra,x100,calibrate);
rt_kprintf("%8d mS %8d Passes (x 100)n",(int)(TimeUsed*1000),xtra);
calibrate++;
count--;
if (TimeUsed > 2.0)
{
count = 0;
}
else
{
xtra = xtra * 5;
}
}
while (count > 0);
if (TimeUsed > 0) xtra = (long)((SPDP)(duration * xtra) / TimeUsed);
if (xtra < 1) xtra = 1;
calibrate = 0;
rt_kprintf("nUse %dpasses (x 100)n", (int)xtra);
rt_kprintf("n %s Precision C/C++ Whetstone Benchmark",Precision);
#ifdef PRECOMP
rt_kprintf("n Compiler%s", precompiler);
rt_kprintf("n Options %sn", preoptions);
#else
rt_kprintf("n");
#endif
rt_kprintf("nLoop content Result MFLOPS "
" MOPS msnn");
TimeUsed=0;
whetstones(xtra,x100,calibrate);
rt_kprintf("nMWIPS ");
if (TimeUsed>0)
{
mwips=(float)(xtra) * (float)(x100) / (10 * TimeUsed);
}
else
{
mwips = 0;
}
rt_kprintf(" %13d%13dnn",(int)(mwips*1000),(int)(TimeUsed*1000));
if (Check == 0) rt_kprintf("Wrong answer");
/************************************************************************/
/* Add results to output file whets.txt */
/************************************************************************/
///rt_kprintf( "n");
///rt_kprintf( "##############################################nn");
///for (i=1; i<10; i++)
///{
/// frt_kprintf(outfile, "%s n", configdata[i]);
///}
///rt_kprintf( "n");
///rt_kprintf( "##############################################nn");
///rt_kprintf( "Whetstone %s Precision C Benchmark%s, %sn",Precision, opt, timeday);
///rt_kprintf( "n");
//rt_kprintf("Loop content Result"
// " MFLOPS MOPS Secondsnn");
//for (section=1; section<9; section++)
// {
// rt_kprintf( "%s%24.17f ", headings[section],
// results[section]);
// if (loop_mops[section] == 99999)
// {
// rt_kprintf("%9.3f %9.3fn",
// loop_mflops[section], loop_time[section]);
// }
// else
// {
// rt_kprintf( " %9.3f %9.3fn",
// loop_mops[section], loop_time[section], results[section]);
// }
//}
//fflush(outfile);
//rt_kprintf( "nMWIPS ");
//rt_kprintf( "%9.3f%9.3fnn",mwips,TimeUsed);
// rt_kprintf( "Resultstoloadtospreadsheet ");
// rt_kprintf( " MWIPS Mflops1 Mflops2 Mflops3 Cosmops"
// " ExpmopsFixpmops Ifmops Eqmopsn");
//rt_kprintf( "Resultstoloadtospreadsheet ");
// rt_kprintf( " %9.3f %9.3f %9.3f", mwips, loop_mflops[1],
// loop_mflops[2]);
// rt_kprintf( " %9.3f %9.3f %9.3f", loop_mflops[6],
// loop_mops[5], loop_mops[8]);
//rt_kprintf( " %9.3f %9.3f %9.3fnn", loop_mops[4],
// loop_mops[3], loop_mops[7]);
///fflush(outfile);
///fclose (outfile);
///rt_kprintf ("n");
///rt_kprintf ("A new results file, whets.txt,will have been created in the samen");
///rt_kprintf ("directory as the .EXE files, if one did not already exist.nn");
if (nopause)
{
rt_kprintf(" Press Enternn");
i = getchar();
}
return 0;
}
void whetstones(long xtra, long x100, int calibrate)
{
long n1,n2,n3,n4,n5,n6,n7,n8,i,ix,n1mult;
SPDP x,y,z;
long j,k,l;
SPDP e1[4];
SPDP t =0.49999975;
SPDP t0 = t;
SPDP t1 = 0.50000025;
SPDP t2 = 2.0;
Check=0.0;
n1 = 12*x100;
n2 = 14*x100;
n3 = 345*x100;
n4 = 210*x100;
n5 = 32*x100;
n6 = 899*x100;
n7 = 616*x100;
n8 = 93*x100;
n1mult = 10;
/* Section 1, Array elements */
e1[0] = 1.0;
e1[1] = -1.0;
e1[2] = -1.0;
e1[3] = -1.0;
start_time();
{
for (ix=0; ix;>
{
for(i=0; i*n1mult;>
{
e1[0] = (e1[0] + e1[1] + e1[2] - e1[3]) * t;
e1[1] = (e1[0] + e1[1] - e1[2] + e1[3]) * t;
e1[2] = (e1[0] - e1[1] + e1[2] + e1[3]) * t;
e1[3] = (-e1[0] + e1[1] + e1[2] + e1[3]) * t;
}
t = 1.0 - t;
}
t =t0;
}
end_time();
secs = secs/(SPDP)(n1mult);
pout("N1 floating point",(float)(n1*16)*(float)(xtra),
1,e1[3],secs,calibrate,1);
/* Section 2, Array as parameter */
start_time();
{
for (ix=0; ix;>
{
for(i=0; i;>
{
pa(e1,t,t2);
}
t = 1.0 - t;
}
t =t0;
}
end_time();
pout("N2 floating point",(float)(n2*96)*(float)(xtra),
1,e1[3],secs,calibrate,2);
/* Section 3, Conditional jumps */
j = 1;
start_time();
{
for (ix=0; ix;>
{
for(i=0; i;>
{
if(j==1) j = 2;
else j = 3;
if(j>2) j = 0;
else j = 1;
if(j<1)? ?? ???j = 1;
else j = 0;
}
}
}
end_time();
pout("N3 if then else",(float)(n3*3)*(float)(xtra),
2,(SPDP)(j),secs,calibrate,3);
/* Section 4, Integer arithmetic */
j = 1;
k = 2;
l = 3;
e1[0] = 0.0;
e1[1] = 0.0;
start_time();
{
for (ix=0; ix;>
{
for(i=0; i;>
{
j = j *(k-j)*(l-k);
k = l * k - (l-j) * k;
l = (l-k) * (k+j);
e1[l-2] = e1[l-2] + j + k + l;
e1[k-2] = e1[k-2] + j * k * l;
//was e1[l-2] = j + k + l; ande1[k-2] = j * k * l;
}
}
}
end_time();
x = (e1[0]+e1[1])/(SPDP)n4/(SPDP)xtra; // was x = e1[0]+e1[1];
pout("N4 fixed point ",(float)(n4*15)*(float)(xtra),
2,x,secs,calibrate,4);
/* Section 5, Trig functions */
x = 0.5;
y = 0.5;
start_time();
{
for (ix=0; ix;>
{
for(i=1; i;>
{
x = t*atan(t2*sin(x)*cos(x)/(cos(x+y)+cos(x-y)-1.0));
y = t*atan(t2*sin(y)*cos(y)/(cos(x+y)+cos(x-y)-1.0));
}
t = 1.0 - t;
}
t = t0;
}
end_time();
pout("N5 sin,cos etc.",(float)(n5*26)*(float)(xtra),
2,y,secs,calibrate,5);
/* Section 6, Procedure calls */
x = 1.0;
y = 1.0;
z = 1.0;
start_time();
{
for (ix=0; ix;>
{
for(i=0; i;>
{
p3(&x,&y,&z,t,t1,t2);
}
}
}
end_time();
pout("N6 floating point",(float)(n6*6)*(float)(xtra),
1,z,secs,calibrate,6);
/* Section 7, Array refrences */
j = 0;
k = 1;
l = 2;
e1[0] = 1.0;
e1[1] = 2.0;
e1[2] = 3.0;
start_time();
{
for (ix=0; ix;>
{
for(i=0;i;i++)
{
po(e1,j,k,l);
}
}
}
end_time();
pout("N7 assignments ",(float)(n7*3)*(float)(xtra),
2,e1[2],secs,calibrate,7);
/* Section 8, Standard functions */
x = 0.75;
start_time();
{
for (ix=0; ix;>
{
for(i=0; i;>
{
x = sqrt(exp(log(x)/t1));
}
}
}
end_time();
pout("N8 exp,sqrt etc. ",(float)(n8*4)*(float)(xtra),
2,x,secs,calibrate,8);
return;
}
void pa(SPDP e[4], SPDP t, SPDP t2)
{
long j;
for(j=0;j<6;j++)
{
e[0] = (e[0]+e[1]+e[2]-e[3])*t;
e[1] = (e[0]+e[1]-e[2]+e[3])*t;
e[2] = (e[0]-e[1]+e[2]+e[3])*t;
e[3] = (-e[0]+e[1]+e[2]+e[3])/t2;
}
return;
}
void po(SPDP e1[4], long j, long k, long l)
{
e1[j] = e1[k];
e1[k] = e1[l];
e1[l] = e1[j];
return;
}
void p3(SPDP *x, SPDP *y, SPDP *z, SPDP t, SPDP t1, SPDP t2)
{
*x = *y;
*y = *z;
*x = t * (*x + *y);
*y = t1 * (*x + *y);
*z = (*x + *y)/t2;
return;
}
void pout(char* title, float ops, int type, SPDP checknum,
SPDP time, int calibrate, int section)
{
SPDP mops,mflops;
Check = Check + checknum;
loop_time[section] = time;
strcpy (headings[section],title);
TimeUsed =TimeUsed + time;
if (calibrate == 1)
{
results[section] = checknum;
}
if (calibrate == 0)
{
rt_kprintf("%s %13d ",headings[section],(int)(results[section]*1000));
if (type == 1)
{
if (time>0)
{
mflops = ops/(1000000L*time);
}
else
{
mflops = 0;
}
loop_mops[section] = 99999;
loop_mflops[section] = mflops;
rt_kprintf(" %13d %13dn",
(int)(loop_mflops[section]*1000), (int)(loop_time[section]*1000));
}
else
{
if (time>0)
{
mops = ops/(1000000L*time);
}
else
{
mops = 0;
}
loop_mops[section] = mops;
loop_mflops[section] = 0;
rt_kprintf(" %13d%13dn",
(int)(loop_mops[section]), (int)(loop_time[section]*1000));
}
}
return;
}