Current Research

For embedded systems, especially embedded control systems which are built on RTOS, it is very important to meet the constraints of time and space.

General-purpose systems which are built on general-purpose operating systems also have such constraints.

But they are quite different.

For example, assume that a batch processing on a general-purpose system has to finish the job by next morning.

In this case, the next morning is deadline.

If the job processes 10 million records during night time (8h20m), each record has to be processed in 3 milliseconds.

This 3 milliseconds is AVERAGE time, because it is sufficient that the system finish whole the job by next morning.

In the other hand, assume that a embedded system controls a device in 333Hz.

Each process has to finish in 3 milliseconds.

If it continues 8 hours, the processes will be repeated about 10 million times.

In this case, 3 milliseconds is the worst case execution time (WCET).

Space constraints are also crucial for embedded systems.

For embedded system if the limitation of processing times is 10 million, the 10,000,001th processing will be failed.

Such a value is strictly defined in order to clear the limitation of the system.

As mentioned above, required characteristics are quite different between embedded systems and general-purpose systems.

So the characteristics required for programming languages and software component systems are also different between them.

My research interests are to find suitable characteristics of languages and component systems for embedded systems, then implement them and evaluate them.