Algorithm 1. Finding Optimal Machine Parameters.

given the environment parameter

papp← application's parallelism

set the default parameters

f ← maximum frequency

n ← 1 core

do {

calculate E(f, n, papp)

if (n_next is not last level) {

n_next ← next increased level

calculate E(f, n_next, papp)}

if (f_next is not last level) {

f_next← next decreased level

calculate E(f_next, n, papp)}

if (E(f, n_next, papp)<E(f, n, papp)) n←n_next

if (E(f_next, n, papp)<E(f, n_next, papp)) f←f_next

} while ((E(f, n, papp)<E(f, n_next, papp) AND E(f, n, papp)<E(f_next, n, papp))

f_opt←f // found optimal frequency

n_opt←n// found optimal cores