Network servers make special demands that other types of applications may not make on memory allocators. We describe a simple malloc() microbenchmark suite that tests the ability of malloc() to divide its work efficiently among multiple threads and processors. The purpose of this suite is to determine the suitability of an operating system's heap allocator for use with network servers running in an SMP environment. May 2, 2000 Center for Information Technology Integration University of Michigan 519 West William Street Ann Arbor, MI 48103-4943