Zwaenepoel, Willy2009-06-042009-06-041997Pai, Vivek Sadananda. "IO-lite: A copy-free UNIX I/O system." (1997) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17117">https://hdl.handle.net/1911/17117</a>.https://hdl.handle.net/1911/17117Memory copy speed is known to be a significant barrier to high-speed communication. We perform an analysis of the requirements for a copy-free buffer system, develop an implementation-independent applications programming interface (API) based on those requirements, and then implement a system that conforms to the API. In addition, we design and implement a fully copy-free filesystem cache. Performance tests indicate that our system dramatically outperforms traditional systems on communications-oriented tasks by a factor of 2 to 10. Application programs that have been modified to utilize our copy-free system have also shown reductions in run time, ranging from 10% to nearly 50%.78 p.application/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ElectronicsElectrical engineeringComputer scienceThesisTHESIS COMP.SCI. 1997 PAI