The importance of non-data touching processing overheads in TCP/IP

摘要: We present detailed measurements of various processing overheads the TCP/IP and UDP/IP protocol stacks on a DECstation 5000/200 running Ultrix 4.2a operating system. These include data-touching operations, such as checksum computation data movement, which are well known to be major time consumers. In this study, we also considered due non-data touching network buffer manipulation, protocol-specific processing, system functions, structure manipulations (other than buffers), error checking. show that when one considers realistic message size distributions, where majority messages small, cumulative consumed by represents time. assert it will difficult significantly reduce overheads.