Patents by Inventor Xiao Jun Dai

Xiao Jun Dai 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).

  • Patent number: 10102128
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 16, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Patent number: 10102127
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Grant
    Filed: November 24, 2015
    Date of Patent: October 16, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Publication number: 20160085679
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Application
    Filed: November 24, 2015
    Publication date: March 24, 2016
    Applicant: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Publication number: 20160085676
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Application
    Filed: November 24, 2015
    Publication date: March 24, 2016
    Applicant: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Patent number: 9251079
    Abstract: A cache memory device includes a plurality of cache areas, each the cache area comprising a plurality of entries. The cache memory device is configured to maintain a separate lock attribute for each the cache area and temporarily assign possession of a lock attribute for a particular the cache area to a processor thread attempting to update the particular the cache area, the processor thread being unable to update the particular the cache area without possession of the lock attribute for the particular the cache area.
    Type: Grant
    Filed: November 22, 2010
    Date of Patent: February 2, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Patent number: 9251080
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: February 2, 2016
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Patent number: 9235444
    Abstract: Global heap allocation technologies in a multi-thread environment, and particularly a method for dynamically adjusting global heap allocation in the multi-thread environment, and more particularly to a method and system for dynamically adjusting global heap allocation by monitoring conflict parameters of the global heap allocation method. Specifically, a method of dynamically adjusting global heap allocation in multi-thread environment, comprising: identifying a global heap allocation method in an application program; judging whether the global heap allocation method is a multi-thread conflict hot point; and using a local stack to allocate memory space requested by the global heap allocation method in response to a “yes” judging result.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: January 12, 2016
    Assignee: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Rui Bo Han, Wei Liu, Zhi Da Luo
  • Patent number: 9229775
    Abstract: Global heap allocation technologies in a multi-thread environment, and particularly to a system for dynamically adjusting global heap allocation in the multi-thread environment, and more particularly to a method and system for dynamically adjusting global heap allocation by monitoring conflict parameters of the global heap allocation method. The present invention provides a system for dynamically adjusting global heap allocation in multi-thread environment, comprising: identifying a global heap allocation method in an application program; judging whether the global heap allocation method is a multi-thread conflict hot point; and using a local stack to allocate memory space requested by the global heap allocation method in response to a “yes” judging result.
    Type: Grant
    Filed: March 27, 2013
    Date of Patent: January 5, 2016
    Assignee: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Rui Bo Han, Wei Liu, Zhi Da Luo
  • Publication number: 20150007195
    Abstract: Global heap allocation technologies in a multi-thread environment, and particularly a method for dynamically adjusting global heap allocation in the multi-thread environment, and more particularly to a method and system for dynamically adjusting global heap allocation by monitoring conflict parameters of the global heap allocation method. Specifically, a method of dynamically adjusting global heap allocation in multi-thread environment, comprising: identifying a global heap allocation method in an application program; judging whether the global heap allocation method is a multi-thread conflict hot point; and using a local stack to allocate memory space requested by the global heap allocation method in response to a “yes” judging result.
    Type: Application
    Filed: September 16, 2014
    Publication date: January 1, 2015
    Inventors: Xiao Jun Dai, Rui Bo Han, Wei Liu, Zhi Da Luo
  • Patent number: 8578369
    Abstract: Virtual machines are managed by obtaining software hierarchy information of a current virtual machine to be installed. Then logical memory assigned to the current virtual machine is divided into a private part and a shared part based at least in part upon existing software hierarchy information of at least one virtual machine already installed and the software hierarchy information of the current virtual machine. Then, the shared part of the logical memory is mapped to shared segments of a physical memory, wherein the shared segments are used by at least one installed virtual machine.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: November 5, 2013
    Assignee: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Zhi Gan, Rui Bo Han, Xian Liu
  • Patent number: 8578370
    Abstract: Virtual machines are managed by obtaining software hierarchy information of a current virtual machine to be installed. Then logical memory assigned to the current virtual machine is divided into a private part and a shared part based at least in part upon existing software hierarchy information of at least one virtual machine already installed and the software hierarchy information of the current virtual machine. Then, the shared part of the logical memory is mapped to shared segments of a physical memory, wherein the shared segments are used by at least one installed virtual machine.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: November 5, 2013
    Assignee: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Zhi Gan, Rui Bo Han, Xian Liu
  • Publication number: 20130263149
    Abstract: Global heap allocation technologies in a multi-thread environment, and particularly to a method and system for dynamically adjusting global heap allocation in the multi-thread environment, and more particularly to a method and system for dynamically adjusting global heap allocation by monitoring conflict parameters of the global heap allocation method. The present invention provides a method of dynamically adjusting global heap allocation in multi-thread environment, comprising: identifying a global heap allocation method in an application program; judging whether the global heap allocation method is a multi-thread conflict hot point; and using a local stack to allocate memory space requested by the global heap allocation method in response to a “yes” judging result.
    Type: Application
    Filed: March 27, 2013
    Publication date: October 3, 2013
    Applicant: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Rui Bo Han, Wei Liu, Zhi Da Luo
  • Patent number: 8316370
    Abstract: A method of accessing a shared data structure in parallel by multiple threads in a parallel application program is disclosed. A lock of the shared data structure is granted to one thread of the multiple threads, an operation of the thread which acquires the lock is performed on the shared data structure, an operation of each thread of the multiple threads which does not acquire the lock is buffered, and the buffered operations are performed on the shared data structure when another thread of the multiple threads subsequently acquires the lock. A corresponding apparatus and program product are also disclosed.
    Type: Grant
    Filed: September 24, 2009
    Date of Patent: November 20, 2012
    Assignee: International Business Machines Corporation
    Inventors: Xiao Jun Dai, Zhi Gan, Yao Qi, Mo Jiong Qiu
  • Publication number: 20120216185
    Abstract: Virtual machines are managed by obtaining software hierarchy information of a current virtual machine to be installed. Then logical memory assigned to the current virtual machine is divided into a private part and a shared part based at least in part upon existing software hierarchy information of at least one virtual machine already installed and the software hierarchy information of the current virtual machine. Then, the shared part of the logical memory is mapped to shared segments of a physical memory, wherein the shared segments are used by at least one installed virtual machine.
    Type: Application
    Filed: May 2, 2012
    Publication date: August 23, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Zhi Gan, Rui Bo Han, Xian Liu
  • Publication number: 20120191917
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Application
    Filed: March 20, 2012
    Publication date: July 26, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Publication number: 20120166705
    Abstract: Virtual machines are managed by obtaining software hierarchy information of a current virtual machine to be installed. Then logical memory assigned to the current virtual machine is divided into a private part and a shared part based at least in part upon existing software hierarchy information of at least one virtual machine already installed and the software hierarchy information of the current virtual machine. Then, the shared part of the logical memory is mapped to shared segments of a physical memory, wherein the shared segments are used by at least one installed virtual machine.
    Type: Application
    Filed: December 20, 2011
    Publication date: June 28, 2012
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Zhi Gan, Rui Bo Han, Xian Liu
  • Publication number: 20110131378
    Abstract: Managing access to a cache memory includes dividing said cache memory into multiple of cache areas, each cache area having multiple entries; and providing at least one separate lock attribute for each cache area such that only a processor thread having possession of the lock attribute corresponding to a particular cache area can update that cache area.
    Type: Application
    Filed: November 22, 2010
    Publication date: June 2, 2011
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Xiao Jun Dai, Subhendu Das, Zhi Gan, Zhang Yue
  • Publication number: 20100083266
    Abstract: A method of accessing a shared data structure in parallel by multiple threads in a parallel application program is disclosed, in which a lock of the shared data structure is granted to one thread of the multiple threads, an operation of the thread which acquires the lock is performed on the shared data structure, then an operation of each thread of the multiple threads which does not acquire the lock is buffered, and finally the buffered operations are performed on the shared data structure when another thread of the multiple threads subsequently acquires the lock. By using this method, the operations of other threads which do not acquire the lock of the shared data structure can be buffered automatically when the shared data structure is locked by one thread, and all the buffered operations can be performed when another thread acquires the lock.
    Type: Application
    Filed: September 24, 2009
    Publication date: April 1, 2010
    Applicant: International Business Machines
    Inventors: Xiao Jun Dai, Zhi Gan, Yao Qi, Mo Jiong Qiu