nizky vypocetni vykon na 2CPU stroji (delsi)

[Libor Chocholaty]

Matus UHLAR - fantomas wrote:

>a ako spomenuli "moje kalhotky", dolezite je testovat:
>
>echo 2^1000000 | time bc > /dev/null
>
>aby ste zistili kolko casu trva prevedenie prikazu "bc" a nie prikazu "echo"
>
>  
>
Nevim jaky shell pouzivate, ale interni time v bashi to meri oboje. 
Takze oba dva priklady davaji dost podobne vysledky. Aby se to chovalo, 
jak popisujete, museli byste napsat:
/usr/bin/time echo ...

Kouknete sam:
libor na lch:~/shares$ time echo 2^1000000 | bc >/dev/null

real    0m9.616s
user    0m9.520s
sys     0m0.080s
libor na lch:~/shares$ echo 2^1000000 | time bc >/dev/null
9.52user 0.08system 0:09.89elapsed 96%CPU (0avgtext+0avgdata 0maxresident)k
0inputs+0outputs (160major+781minor)pagefaults 0swaps
libor na lch:~/shares$