User-Level DMA
without Operating System Kernel Modification

Evangelos P. Markatos and Manolis G.H. Katevenis
Institute of Computer Science (ICS)
Foundation for Research & Technology - Hellas (FORTH)
P.O.Box 1385, Science and Technology Park of Crete,
Heraklion, Crete, GR-711-10 GREECE markatos@ics.forth.gr
In Third International Symposium on High Performance Computer Architecture (HPCA-3)
San Antonio, TX, Feb. 1997
URL: http://www.ics.forth.gr/proj/arch-vlsi/telegraphos.html

• Introduction
• User-Level DMA - Early Work
  • The Problem
  • Kernel-Level Initiation of DMA
  • Passing Physical Addresses
  • The first SHRIMP solution
  • The second SHRIMP solution
  • The FLASH solution
  • The PAL Code approach
• User-level DMA without Kernel Modifications
  • User-level DMA based on keys
  • Extended Shadow Addressing
  • Repeated passing of arguments
    • Proof of Correctness
  • Performance Evaluation
  • User-Level Atomic Operations
• Summary
• References
• About this document ...