Comparison of Techniques Used in Prioritized Mutual Exclusion by Groups

The aim of this work is to allocate the critical section to distributed processes organized by groups having distinct priorities. Affectation can be made inside a group when there are not requests from groups having a greater priority. This paper discusses some techniques to do this in relation to architecture and number of messages. If there are requests issued from distinct groups, there must be an algorithm to decide which request has to be accepted. To do this, other techniques are required. Both, internal and external techniques are examined independently.