Cisco Technology, Inc.

Arthur B Stine

Pradeep Kumar Kathail

Stephen Paul Belair

Kenneth A Moberg

Ronnie B Kon

Critical code routines are identified, separated from other routines, and compiled into a set of one or more critical dynamic link libraries (&ldquo;DLLs&rdquo;). These are then recognized by a DLL loader and loaded at a reserved address space in the DLL memory space. Once all of the critical DLLs have been loaded, cache locking may be enabled for the reserved address space. Robust fault containment is facilitated through the use of code modules implemented as shared libraries that can be loaded and unloaded in a running system by individual processes. These code modules can be replaced individually as defects are found and fixed without requiring replacement of the entire system image or application image. What would normally be a monolithic application is modularized, and the sharing of common code among multiple applications is facilitated.

Apparatus and method for improving performance of critical code execution

A method of allocating memory for a file includes determining a size of the file and searching a memory segment list to determine whether the file can be stored in one of a plurality of memory segments catalogued in the memory segment list. The memory segment list includes a plurality of entries, each one of the plurality of entries being associated with one of the plurality of memory segments and indicating whether the associated one of the plurality of memory segments includes a hole that is unoccupied, where each of the corresponding ones of the plurality of entries are adapted for identifying the hole and a hole size associated with the hole that identifies an amount of memory within the memory segment that is unoccupied.

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Sunnyvale, CA, United States of America

Arthur B Stine