Patents by Inventor Paul Barham

Paul Barham 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).

  • Publication number: 20070058631
    Abstract: Hosts or end-systems residing at the edges of a network gather data about the traffic they transmit into and receive from the network. The network's routing protocol (typically a link-state protocol such as OSPF) is monitored and routing data or packets are used to recover the network's current status and topology. This data can be collected, fused, and maintained and a platform, preferably distributed, can be provided to query the data, thus enabling a variety of network management applications.
    Type: Application
    Filed: August 12, 2005
    Publication date: March 15, 2007
    Applicant: Microsoft Corporation
    Inventors: Richard Mortier, Paul Barham, Rebecca Isaacs
  • Publication number: 20060288149
    Abstract: A computing system for determining performance factors for using in performance modeling of a deployed subject system, is presented. The computing system includes a plurality of software components comprising the subject system. Each of the components is susceptible to event tracing while executing on the computing system. The computing system includes a tracing component. The tracing component is configured to trace events of the components of the subject system as they execute. The computing system includes a transaction identification table. The transaction identification table comprises starting and ending actions for transactions performed by the subject system. The computing system also includes a transaction identification component that identifies actions from traced events, identifies related actions corresponding to a transaction according to the starting and ending actions in the transaction identification table, and stores the related actions in the transaction workflow data store.
    Type: Application
    Filed: June 15, 2005
    Publication date: December 21, 2006
    Applicant: Microsoft Corporation
    Inventors: Glenn LaVigne, Efstathios Papaefstathiou, Jonathan Hardwick, Quanzhan Zheng, Rebecca Isaacs, Paul Barham
  • Publication number: 20060114825
    Abstract: Network congestion avoidance within aggregated channels is disclosed. In one embodiment, a method first transmits a packet associated with a first channel of a plurality of related channels from a source protocol layer (e.g., a source IP layer) of a source through a network (e.g., the Internet). Next, the method triggers an ECN event by the packet at the network. Finally, at least one channel is determined to have decreased packets transmitted therethrough, in response to the triggering of the ECN event (e.g., based on a congestion pricing criteria).
    Type: Application
    Filed: January 19, 2006
    Publication date: June 1, 2006
    Applicant: Microsoft Corporation
    Inventors: Derek McAuley, Paul Barham, Peter Key, Koenraad Laevens
  • Publication number: 20050246718
    Abstract: Extensions to operating systems or software applications can be hosted in virtual environments to fault isolate the extension. A generic proxy extension invoked by a host process can coordinate the invocation of an appropriate extension in a virtual process that can provide the same support APIs as the host process. Furthermore, a user mode context can be provided to the extension in the virtual process through memory copying or page table modifications. In addition, the virtual process, especially a virtual operating system process running on a virtual machine, can be efficiently started by cloning a coherent state. A coherent state can be created when a virtual machine starts up, or when the computing device starts up and the appropriate parameters are observed and saved. Alternatively, the operating system can create a coherent state by believing there is an additional CPU during the boot process.
    Type: Application
    Filed: April 30, 2004
    Publication date: November 3, 2005
    Applicant: Microsoft Corporation
    Inventors: Ulfar Erlingsson, Edward Wobber, Paul Barham, Thomas Roeder
  • Publication number: 20040003107
    Abstract: A method and system are presented for determining the loading and capacity on a variable capacity channel by measuring the times at which packets are enqueued for transmission, and have their transmission completed, or by measuring these times in addition to the arrival times of the packets. The times may be measured using a device driver or other operating system component. The measurement may be performed in a centralized or distributed fashion for multi-access or point to point channels.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 1, 2004
    Inventors: Paul Barham, Richard Black, Neil Stratford
  • Publication number: 20030097461
    Abstract: A method and system for avoiding network congestion by measuring network load to adjust a rate at each source. The load (e.g., as a price value) is provided to network traffic sources, which adjust their flows based on a per-flow weight (willingness to pay). The load may be determined in-band by routers or out-of-band by an observer node. A load value (e.g., as a price) is increased or decreased based on the actual load or an estimate based on the actual load. The sources obtain the load value and control the output rates per flow based on each flow's associated weight (willingness to pay), e.g., as set by an administrator. Further, two classes of applications are enabled by allowing certain applications to ignore price.
    Type: Application
    Filed: November 8, 2001
    Publication date: May 22, 2003
    Inventors: Paul Barham, Richard Black, Peter Key, Neil Stratford