filemem

Section: User Commands (1)
Updated: October 5, 1990
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NAME

filemem - show a list of a file's pages cached in memory

SYNOPSIS

filemem filename

DESCRIPTION

Filemem is a utility that can determine which pages of a file are cached in memory. In Mach, pages of a file are cached on demand by page faults. Pages remain in memory even after they become unreferenced, and are released when memory becomes scarce.

Filemem provides a way to determine which parts of a file are being used. For example, filemem can be used to help scatterload a file by showing which parts of an executable image are in memory after a certain operation. After determining which pages are resident in memory, the program pagestuff(1) can be used to show the symbols residing on that particular page of a file.

The output of filemem is a list of logical page numbers, starting from page zero at the beginning of the file. The page size is the same as the machine-independent page size of the system.

FILES

/dev/kmem