Program pentru testat procesoare multicore

Am o bucla in care fac cateva milioane de calcule matematice (trigonometrie, ridicari la putere).
Bucla o repet de 8x astfel ca atunci cand sunt x threaduri active fiecare repeta bucla de 8/x ori.

Edited by dani.user, 22 August 2011 - 21:58.

Windows 7 X64
CPU:  AMD Phenom II x3 720  Black Edition  2,8Ghz  

Using 1 thread (Folosind 1 fir de executie)
        25.23 s
Using 2 threads (Folosind 2 fire de executie)
        12.24 s
                      2.06 x faster than by using 1 thread (2.06 ori mai rapid decat folosind 1 fir)
Using 4 threads (Folosind 4 fire de executie)
        9.32 s
                      2.71 x faster than by using 1 thread (2.71 ori mai rapid decat folosind 1 fir)
                      1.31 x faster than by using 2 threads (1.31 ori mai rapid decat folosind 2 fire)
Using 8 threads (Folosind 8 fire de executie)
        7.81 s
                      3.23 x faster than by using 1 thread (3.23 ori mai rapid decat folosind 1 fir)
                      1.57 x faster than by using 2 threads (1.57 ori mai rapid decat folosind 2 fire)
                      1.19 x faster than by using 4 threads (1.19 ori mai rapid decat folosind 4 fire)

pentium dual core 2.7 ghz E5400 windows 7

Using 1 thread (Folosind 1 fir de executie)
        17.28 s
Using 2 threads (Folosind 2 fire de executie)
        8.78 s
                      1.97 x faster than by using 1 thread (1.97 ori mai rapid decat folosind 1 fir)
Using 4 threads (Folosind 4 fire de executie)
        5.12 s
                      3.37 x faster than by using 1 thread (3.37 ori mai rapid decat folosind 1 fir)
                      1.71 x faster than by using 2 threads (1.71 ori mai rapid decat folosind 2 fire)
Using 8 threads (Folosind 8 fire de executie)
        4.55 s
                      3.80 x faster than by using 1 thread (3.80 ori mai rapid decat folosind 1 fir)
                      1.93 x faster than by using 2 threads (1.93 ori mai rapid decat folosind 2 fire)
                      1.13 x faster than by using 4 threads (1.13 ori mai rapid decat folosind 4 fire)

i3-550
Hyperthreading rules :coolspeak: