In a Transputer environment, where the data exchange and the synchronizations between any two processes are carried out by means of I/O operations, the monitoring of the channels used for implementing the message exchange is of particular interest. In this paper a method is illustrated for monitoring the internal channels of an Occam program. This method introduces little CPU overhead, no additional communication cost, and preserves the synchronization behaviour of the two communicating processes. Its characteristics have been attained by means of a particular monitoring mechanism, based upon a rather unusual use of some Transputer machine language instructions, canonically used to implement guarded communications within the Occam ALT construct.
A Method for Monitoring Occam Internal Channel
G De Pietro;
1990
Abstract
In a Transputer environment, where the data exchange and the synchronizations between any two processes are carried out by means of I/O operations, the monitoring of the channels used for implementing the message exchange is of particular interest. In this paper a method is illustrated for monitoring the internal channels of an Occam program. This method introduces little CPU overhead, no additional communication cost, and preserves the synchronization behaviour of the two communicating processes. Its characteristics have been attained by means of a particular monitoring mechanism, based upon a rather unusual use of some Transputer machine language instructions, canonically used to implement guarded communications within the Occam ALT construct.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
