[e2e] TCP and UDP Processing Overhead Delays.

[EXT-Edwards, William H]

Does anyone have any or know of any current figures that can update the 1993
work of Kay and Pasquale in analyzing TCP and UDP Overheads to reduce or
preclude data touching?  Their work using DECstation 5000/200 workstations
with the IO bus monitored by a HP-1625B with 40 nanosecond resolution to
check and compare the overhead processing time delays and the amount of data
touching for Checksums, DataMove (user-to-kernel, device copy, and cache
clear), DataStruct (socket buffers, IP Defragmentation queue, device
interface queue), ErrorCheck, Mbuf, OpSys Overhead (socket support and
synchronization), ProtSpec, and Other (total processing time required
compared to time required in the other previously mentioned areas).  

William H. Edwards
Systems Engineer
Booz-Allen & Hamilton
(703) 872-4289 (Voice)
(703) 872-4254 (Fax)