Files-11 Activity Reporting Program F11ACT is a sytem performance measurement program for taking a snapshot of Files-11 ACP activity on a running IAS or RSX-11D system. It was originally developed to verfiy Files-11 ACP data structures "on the fly", but it has since evolved into a general purpose file system tuning tool. The program produces a report of currently accessed files for each file- structured device known to the system, with statistics on ACP data structures and memory utilization. F11ACT can optionally produce a report on a list of specific devices, or on all devices serviced by a given ACP task. This information can be used to formulate optimal strategies for assigning devices to ACPs on a multiple-ACP system, for determining size requirements for the ACP internal FCB storage area, the size of FCPCOM, the size of the directory LRU cache, and so on. See file EXAMPLE.LST for an example of the output produced by the following commands: PDS> SET DEFAULT [3,35] PDS> RUN F11ACT F11ACT> SY:EXAMPLE/FILES F11ACT> ^Z PDS> See the prologue to module GETPRM for a description of command line syntax.