The Jalapeño virtual machine

  • Authors:
  • B. Alpern;C. R. Attanasio;J. J. Barton;M. G. Burke;P. Cheng;J.-D. Choi;A. Cocchi;S. J. Fink;D. Grove;M. Hind;S. F. Hummel;D. Lieber;V. Litvinov;M. F. Mergen;T. Ngo;J. R. Russell;V. Sarkar;M. J. Serrano;J. C. Shepherd;S. E. Smith;V. C. Sreedhar;H. Srinivasan;J. Whaley

  • Affiliations:
  • IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;Computer Science Department, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;University of Washington, Computer Science and Engineering, Box 352350, Seattle, Washington;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P. O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Research Division, Thomas J. Watson Research Center, P.O. Box 704, Yorktown Heights, New York;IBM Tokyo Research Laboratory, IBM Japan, Ltd., 1623-14 Shimotsuruma, Yamato-shi, Kanagawa-ken 242-8502 Japan

  • Venue:
  • IBM Systems Journal
  • Year:
  • 2000

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Abstract

Jalapeño is a virtual machine for JavaTM servers written in the Java language. To be able to address the requirements of servers (performance and scalability in particular), Jalapeño was designed "from scratch" to be as self-sufficient as possible. Jalapeño's unique object model and memory layout allows a hardware null-pointer check as well as fast access to array elements, fields, and methods. Run-time services conventionally provided in native code are implemented primarily in Java. Java threads are multiplexed by virtual processors (implemented as operating system threads). A family of concurrent object allocators and parallel type-accurate garbage collectors is supported. Jalapeño's interoperable compilers enable quasi-preemptive thread switching and precise location of object references. Jalapeño's dynamic optimizing compiler is designed to obtain high quality code for methods that are observed to be frequently executed or computationally intensive.