Patents by Inventor David Callahn

David Callahn has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Private memory regions and coherency optimization by controlling snoop traffic volume in multi-level cache hierarchy
    Patent number: 9767027
    Abstract: A system for optimizing cache coherence message traffic volume is disclosed. The system includes a plurality of caches in a multi-level memory hierarchy and a plurality of agents. Each agent is associated with a cache. The system includes one or more monitoring engines. Each agent in the plurality of agents is associated with a monitoring engine. The agents can execute a processor level software instruction causing a memory region to be private to the agent. Each of the agents is configured to execute a memory access for data on an associated cache and to send a request for data up the hierarchy on a cache miss. The monitoring engine is configured to intercept request for data from an agent and to prevent snooping for the cache line in peer caches when the cache line associated with a memory region represented as private to the agent.
    Type: Grant
    Filed: July 10, 2014
    Date of Patent: September 19, 2017
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Jan Gray, David Callahn, Burton Jordan Smith, Gad Sheaffer, Ali-Reza Adl-Tabatabai
  • Private Memory Regions and Coherence Optimizations
    Publication number: 20140325154
    Abstract: A system for optimizing cache coherence message traffic volume is disclosed. The system includes a plurality of caches in a multi-level memory hierarchy and a plurality of agents. Each agent is associated with a cache. The system includes one or more monitoring engines. Each agent in the plurality of agents is associated with a monitoring engine. The agents can execute a processor level software instruction causing a memory region to be private to the agent. Each of the agents is configured to execute a memory access for data on an associated cache and to send a request for data up the hierarchy on a cache miss. The monitoring engine is configured to intercept request for data from an agent and to prevent snooping for the cache line in peer caches when the cache line associated with a memory region represented as private to the agent.
    Type: Application
    Filed: July 10, 2014
    Publication date: October 30, 2014
    Inventors: Jan Gray, David Callahn, Burton Jordan Smith, Gad Sheaffer, Ali-Reza Adl-Tabatabai