https://www.arde.cc/foro/microcontroladores/procesador-de-intel-i5-extremadamente-lento-ayuda/ Asociación de Robótica y Domótica de España es Tue, 09 Jun 2026 21:28:46 +0000 wpForo 60 https://www.arde.cc/foro/microcontroladores/procesador-de-intel-i5-extremadamente-lento-ayuda/#post-42861 Sat, 10 Feb 2018 08:13:35 +0000
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Ranganok Schahzaman]]> Microcontroladores y Microprocesadores Ranganok https://www.arde.cc/foro/microcontroladores/procesador-de-intel-i5-extremadamente-lento-ayuda/#post-42861 https://www.arde.cc/foro/microcontroladores/procesador-de-intel-i5-extremadamente-lento-ayuda/#post-4428 Mon, 25 Sep 2017 14:24:49 +0000
Resulta que tarda mucho en hacer divisiones.
Lo he probado en mi nuevo ordenador I5 y tampoco supera los 21 Mops!

Resultados: === Dual-Core AMD Opteron(tm) Processor 2220 1-2.8Ghz ====================================================================== Time for 100 Mega double divisions time = 10.1054 = 10.3764 MOPs Time for 100 Mega float divisions time = 9.714 = 10.7945 MOPs Time for 100 Mega double multiplications time = 0.641829 = 163.373 MOPs Time for 100 Mega double sums time = 0.657963 = 159.367 MOPs Time for 100 Mega double sqrt time = 1.74466 = 60.102 MOPs Time for 100 Mega double sin time = 2.43805 = 43.0087 MOPs Time for 100 Mega double log time = 1.3058 = 80.3017 MOPs Time for 100 Mega int sums time = 0.356066 = 294.489 MOPs Time for 100 Mega int << time = 0.343526 = 305.239 MOPs Time for 100 Mega int divisions time = 1.76286 = 59.4814 MOPs Time for 100 Mega int multiplications time = 0.354854 = 295.495 MOPs Time for 100 Mega int sum+mult time = 0.364358 = 287.787 MOPs ====================================================================== === E5-1620 v3 3.5Ghz ================================================ ====================================================================== Time for 100 Mega double divisions time = 5.242 = 20.0034 MOPs Time for 100 Mega double divisions (20x) time = 0.399 = 262.801 MOPs Time for 100 Mega float divisions time = 4.676 = 22.4246 MOPs Time for 100 Mega double multiplications time = 0.153 = 685.344 MOPs Time for 100 Mega double sums time = 0.101 = 1038.19 MOPs Time for 100 Mega double sqrt time = 0.693 = 151.31 MOPs Time for 100 Mega double sin time = 7.008 = 14.9626 MOPs Time for 100 Mega double log time = 8.358 = 12.5458 MOPs Time for 100 Mega int sums time = 0.026 = 4032.98 MOPs Time for 100 Mega int << time = 0.056 = 1872.46 MOPs Time for 100 Mega int divisions time = 0.743 = 141.127 MOPs Time for 100 Mega int multiplications time = 0.109 = 961.996 MOPs Time for 100 Mega int sum+mult time = 0.06 = 1747.63 MOPs ====================================================================== ====================================================================== Time for 100 Mega double divisions time = 5.199 = 20.1688 MOPs Time for 100 Mega double divisions (20x) time = 0.706 = 148.524 MOPs Time for 100 Mega float divisions time = 4.621 = 22.6915 MOPs Time for 100 Mega double multiplications time = 0.154 = 680.894 MOPs Time for 100 Mega double sums time = 0.103 = 1018.03 MOPs Time for 100 Mega double sqrt time = 0.684 = 153.301 MOPs Time for 100 Mega double sin time = 8.202 = 12.7844 MOPs Time for 100 Mega double log time = 14.608 = 7.17809 MOPs Time for 100 Mega int sums time = 0.032 = 3276.8 MOPs Time for 100 Mega int << time = 0.056 = 1872.46 MOPs Time for 100 Mega int divisions time = 0.807 = 129.935 MOPs Time for 100 Mega int multiplications time = 0.097 = 1081.01 MOPs Time for 100 Mega int sum+mult time = 0.036 = 2912.71 MOPs ====================================================================== === I7-Q720 1.6GHz ================================================ ====================================================================== Time for 100 Mega double divisions time = 10.9031 = 9.6172 MOPs Time for 100 Mega double divisions (20x) time = 1.14586 = 91.5102 MOPs Time for 100 Mega float divisions time = 11.2313 = 9.33619 MOPs Time for 100 Mega double multiplications time = 0.595324 = 176.135 MOPs Time for 100 Mega double sums time = 0.483892 = 216.696 MOPs Time for 100 Mega double sqrt time = 1.4338 = 73.1324 MOPs Time for 100 Mega double sin time = 2.27436 = 46.1043 MOPs Time for 100 Mega double log time = 1.59232 = 65.852 MOPs Time for 100 Mega int sums time = 0.324371 = 323.264 MOPs Time for 100 Mega int << time = 0.337373 = 310.806 MOPs Time for 100 Mega int divisions time = 1.07184 = 97.8293 MOPs Time for 100 Mega int multiplications time = 0.390291 = 268.665 MOPs Time for 100 Mega int sum+mult time = 0.363438 = 288.516 MOPs ====================================================================== ====================================================================== A ver si podeis hacer correr el codigo de abajo en un Ryzen 7!!!
Compuila bien en linux y windows. #include <iostream> #include <string.h> //strcpy strcat #include <stdio.h> //fopen #include <math.h> //sqrt, sin #include <time.h> //clock(), time_t #pragma warning(disable:4996) //disable deprecateds using namespace std; #define _PRINT_RESULT time_t start,stop;char null_char=''; //Use empty timer() to reset start time: #ifndef _PRINT_RESULT void timer(char *title=&null_char,int data_size=1){ stop=clock(); if (*title) printf("%s time = %7lg = %7lg MOPsn",title,(double) (stop-start)/(double) CLOCKS_PER_SEC, 1e-6*data_size/( (double)(stop-start)/(double)CLOCKS_PER_SEC ) ); start=clock(); } #else char string_timer,str1; void timer(char *title=&null_char,int data_size=1) { stop=clock(); if (*title) { sprintf(str1,"%s time = %7lg = %7lg MOPsn",title,(double) (stop-start)/(double) CLOCKS_PER_SEC, 1e-6*data_size/( (double)(stop-start)/(double)CLOCKS_PER_SEC ) ); cout<<str1; strcat(string_timer,str1); } start=clock(); } #endif int main() { cout << "Perform test in Release mode. Results will be wrong in debug mode" <<endl; int isum=0,size=100*1024*1024; timer();//void timer resets timer! double dsum=1.0,d2=1.111; // for (int i=0;i<size/20;i++) // dsum=2.0/(dsum+3.0/(dsum+4.0/(dsum+5.0/(dsum+6.0/(dsum+7.0/(dsum+8.0/(dsum+9.0/(dsum+10.0/(dsum+11.0/(dsum +12.0/(dsum+13.0/(dsum+14.0/(dsum+15.0/(dsum+16.0/(dsum+17.0/(dsum+18.0/(dsum+19.0/(dsum+21.0/(dsum+27.0/(dsum+2.0 ; // timer("Time for 100 Mega double divisions x20 ",size); for (int i=0;i<size;i++) dsum/=d2; timer("Time for 100 Mega double divisions ",size); for (int i=0;i<size/20;i++) { dsum=1.1/(dsum+2.2/(dsum+2.3/(dsum+2.4/(dsum+2.5/(dsum+2.6/(dsum+2.7/(dsum+2.8/(dsum+2.9/(dsum+2.1/(dsum+2.2/(dsum+2.3/(dsum+2.4/(dsum+2.5/(dsum+2.6/(dsum+2.7/(dsum+2.8/(dsum+2.9/(dsum+3.1/(dsum+1.111))))))))))))))))))); } timer("Time for 100 Mega double divisions (20x)",size); float fsum=1.0f; for (int i=0;i<size;i++) fsum=fsum/1.1111f; timer("Time for 100 Mega float divisions ",size); for (int i=0;i<size;i++) dsum=dsum*d2; timer("Time for 100 Mega double multiplications",size); for (int i=0;i<size;i++) dsum=dsum+d2; timer("Time for 100 Mega double sums ",size); for (int i=0;i<size;i++) dsum=sqrt(dsum); timer("Time for 100 Mega double sqrt ",size);dsum+=1.01; for (int i=0;i<size;i++) dsum=sin(dsum); timer("Time for 100 Mega double sin ",size);dsum+=1.01; for (int i=0;i<size;i++) dsum=log(dsum+2.0); timer("Time for 100 Mega double log ",size);dsum+=1.01; for (int i=0;i<size;i++) isum+=i; timer("Time for 100 Mega int sums ",size); for (int i=0;i<size;i++) isum<<=i; timer("Time for 100 Mega int << ",size); isum+=1; for (int i=1;i<size+1;i++) isum/=i; timer("Time for 100 Mega int divisions ",size); for (int i=1;i<size+1;i++) isum*=i; timer("Time for 100 Mega int multiplications ",size); for (int i=1;i<size+1;i++) isum=isum*2+i; timer("Time for 100 Mega int sum+mult ",size); #ifdef _PRINT_RESULT FILE *str=fopen("timer result.txt","a"); fprintf(str,"n======================================================================n"); fprintf(str,"%s",string_timer); fprintf(str, "======================================================================n"); fclose(str); #endif cout<<endl<<" Reject following data (done to force for loops be performed after compiler optimizations): "; cout<<isum<<dsum<<fsum<<endl;//to force for() be done on isum cout<<"=== FIN ==="<<endl;getchar(); return 1; }]]> Microcontroladores y Microprocesadores fusion https://www.arde.cc/foro/microcontroladores/procesador-de-intel-i5-extremadamente-lento-ayuda/#post-4428