Short answer:
Simple Imix
Packet Size (Bytes) Proportion of Total Bandwidth (Load)
40 7 parts 6.856%
576 4 parts 56.415%
1500 1 part 36.729%
Complete Imix
Packet Size (Bytes) Proportion of Total Bandwidth (Load)
40 55.0% 5.15%
576 15.0% 20.25%
1500 12.0% 42.20%
40 – 1500 (range) 20.0% 32.40%
Accurate Imix
Packet Size (Bytes) Proportion of Total Bandwidth (Load)
28 1.20% 0.08%
40 35.50% 3.51%
44 2.00% 0.22%
48 2.00% 0.24%
52 3.50% 0.45%
552 0.80% 1.10%
576 11.50% 16.40%
628 1.00% 1.50%
1420 3.00% 10.50%
1500 10.00% 37.10%
40 – 80 (range) 10.80% 1.60%
80 – 576 (range) 11.80% 9.60%
576 – 1500 (range) 6.90% 17.70%
http://tecun.cimex.com.cu/tecun/software/Soporte%20Tecnico%20de%20Redes/Cisco/Routers/OTROS/1MxdPktSzThroughput.pdf