| This paper presents recent results concerning the realization of
HLA RTIs in high-speed LAN environments. Specifically, the UK-RTI
and a second, simplified RTI implementation were realized on a
cluster of Sun workstations using Myrinet, a gigabit, low-latency
interconnection switch developed by Myricomm Inc. The performance
of these implementations was compared with the UK-RTI and version
1.3 of the DMSO RTI using UDP and TCP/IP on an Ethernet LAN. The
Myrinet implementations utilize a software package called RTI-Kit
that implements group communication services and time management
algorithms on high-speed interconnection hardware. Results of this
study demonstrate the technical feasibility and performance that
can be obtained by exploiting high performance interconnection
hardware and software in realizing HLA RTIs. In particular, in most
experiments the RTIs using Myrinet achieved one to two orders of
magnitude improvement in performance relative to the UK-RTI and
DMSO version 1.3 RTI using UDP/TCP in attribute update latency
time, and the wallclock time required to perform a time management
cycle.
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