Our aim was to optimize a SOA control system by evolving the architecture of
the service component that transforms system models into task trees, which
are then executed by the runtime library called the Task Tree Executor, TTE.
In the paper we present the two novel TTE architectures that evolved from the
previous TTE architecture and introduced finer grained parallelism. The novel
architectures execute TTE tasks as more lightweight TBB tasks and Cilk
strands rather than the OS threads, which was the case for the previous TTE
architecture. The experimental evaluation based on time needed for TTE
reliability estimation, by statistical usage tests, shows that these novel
TTE architectures are providing the average relative speedup, RS, from 8x to
11x, over the original TTE, on a dual-core machine. Additional experiments
made on eight-core machine showed that RS provided by TTE based on TBB scales
perfectly, and goes up to 77x. [Projekat Ministarstva nauke Republike Srbije,
br. III 44009 and br. TR 32031]