Internal IP Queueing Delays Characterization (FreeBSD 5.4)

Description:

• In this section, we study the behavior of the internal delays inside the FreeBSD UCP/IP stack. No extra cpu/mem load was inserted. Only the NIC load varies from 100Mbps all the way to 1000Mbps. The traffic pattern is poisson, but that shouldn't matter since in this experiment we are eager to obtain the internal IP queueing delays under different loads.

Rate = 100Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 200Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 300Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 400Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 500Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 600Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 700Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 800Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 900Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)
     Rate = 1000Mbps in order eth->ip delay (50usec) eth->udp delay (100usec) and ip->udp delay (80usec)