Low Efficiency
Considering you have 20 processors performing execution of 20% code, effeciency (output/input) turns out to be only 4.8%. Now doesnt it sound quite useless ?...4.8 only with 20 processors..doh!...I thought the same as well but it is right. The more the processors are and the less the code is, the less the each processor will have to work and the more it will remain idle so efficiency is low.