Patents by Inventor Edward C. Prosser
Edward C. Prosser 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).
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Publication number: 20150058521Abstract: Embodiments described herein identify hot pages associated with a virtual machine that is selected for hibernation or for migration from one computing system to another. For example, before hibernating a virtual machine, a hypervisor monitors the entries in a page table (i.e., a virtual translation table) to see what data pages have corresponding entries in the page table. If a data page has a corresponding entry in the page table, the hypervisor may designate that page as hot. In one embodiment, the hypervisor may update a page map that lists the data pages associated with the virtual machine and whether those data pages are designated as hot. The page map may then be stored during the hibernation process. Before the hibernated virtual machine is resumed, the hypervisor may use the page map to load the hot pages into memory and begin executing the virtual machine.Type: ApplicationFiled: October 17, 2013Publication date: February 26, 2015Applicant: International Business Machines CorporationInventors: Troy D. ARMSTRONG, Daniel C. BIRKESTRAND, Wade B. OUREN, Edward C. PROSSER, Kenneth C. VOSSEN
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Publication number: 20150058522Abstract: Embodiments described herein identify hot pages associated with a virtual machine that is selected for hibernation or for migration from one computing system to another. For example, before migrating a virtual machine, a hypervisor monitors the entries in a page table (e.g., a virtual translation table) to see what data pages have corresponding entries in the page table. If a data page has a corresponding entry in the page table, the hypervisor may designate that page as hot. A source computing system may transmit the hot data pages to a target computing system which loads the pages into memory. After loading the hot pages into memory, the source computing system may cease executing the virtual machine while the target computing system begins to execute the virtual machine. The rest of the data pages associated with the virtual machine may be transmitted to the target computing system subsequently.Type: ApplicationFiled: October 17, 2013Publication date: February 26, 2015Applicant: International Business Machines CorporationInventors: Troy D. ARMSTRONG, Daniel C. BIRKESTRAND, Wade B. OUREN, Edward C. PROSSER, Kenneth C. VOSSEN
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Publication number: 20150058519Abstract: Embodiments described herein identify hot pages associated with a virtual machine that is selected for hibernation or for migration from one computing system to another. For example, before hibernating a virtual machine, a hypervisor monitors the entries in a page table (i.e., a virtual translation table) to see what data pages have corresponding entries in the page table. If a data page has a corresponding entry in the page table, the hypervisor may designate that page as hot. In one embodiment, the hypervisor may update a page map that lists the data pages associated with the virtual machine and whether those data pages are designated as hot. The page map may then be stored during the hibernation process. Before the hibernated virtual machine is resumed, the hypervisor may use the page map to load the hot pages into memory and begin executing the virtual machine.Type: ApplicationFiled: August 22, 2013Publication date: February 26, 2015Applicant: International Business Machines CorporationInventors: Troy D. ARMSTRONG, Daniel C. BIRKESTRAND, Wade B. OUREN, Edward C. PROSSER, Kenneth C. VOSSEN
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Publication number: 20140136800Abstract: In a computer system that includes multiple nodes and multiple logical partitions, a dynamic partition manager computes current memory affinity and potential memory affinity to help determine whether a reallocation of resources between nodes may improve memory affinity for a logical partition or for the computer system. If so, the reallocation of resources is performed so memory affinity for the logical partition or computer system is improved. Memory affinity is computed relative to the physical layout of the resources according to a hardware domain hierarchy that includes a plurality of primary domains and a plurality of secondary domains.Type: ApplicationFiled: November 13, 2012Publication date: May 15, 2014Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Daniel C. Birkestrand, Peter J. Heyrman, Wade B. Ouren, Edward C. Prosser
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Publication number: 20140136801Abstract: In a computer system that includes multiple nodes and multiple logical partitions, a dynamic partition manager computes current memory affinity and potential memory affinity to help determine whether a reallocation of resources between nodes may improve memory affinity for a logical partition or for the computer system. If so, the reallocation of resources is performed so memory affinity for the logical partition or computer system is improved. Memory affinity is computed relative to the physical layout of the resources according to a hardware domain hierarchy that includes a plurality of primary domains and a plurality of secondary domains.Type: ApplicationFiled: December 7, 2012Publication date: May 15, 2014Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Daniel C. Birkestrand, Peter J. Heyrman, Wade B. Ouren, Edward C. Prosser
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Patent number: 8688923Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: GrantFiled: August 15, 2012Date of Patent: April 1, 2014Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8495302Abstract: In an embodiment, a target number of discretionary pages is calculated for a first partition. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: GrantFiled: November 30, 2011Date of Patent: July 23, 2013Assignee: International Business Machines CorporationInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20120324144Abstract: Relocating data in a virtualized environment maintained by a hypervisor administering access to memory with a Cache Page Table (‘CPT’) and a Physical Page Table (‘PPT’), the CPT and PPT including virtual to physical mappings. Relocating data includes converting the virtual to physical mappings of the CPT to virtual to logical mappings; establishing a Logical Memory Block (‘LMB’) relocation tracker that includes logical addresses of an LMB, source physical addresses of the LMB, target physical addresses of the LMB, a translation block indicator for each relocation granule, and a pin count associated with each relocation granule; establishing a PPT entry tracker including PPT entries corresponding to the LMB to be relocated; relocating the LMB in a number of relocation granules including blocking translations to the relocation granules during relocation; and removing the logical addresses from the LMB relocation tracker.Type: ApplicationFiled: August 27, 2012Publication date: December 20, 2012Applicant: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward c. Prosser, Kenneth C. Vossen
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Publication number: 20120311274Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: ApplicationFiled: August 15, 2012Publication date: December 6, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. JACOBS, David A. LARSON, Wade B. OUREN, Edward C. PROSSER, Kenneth C. VOSSEN
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Patent number: 8312230Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: GrantFiled: March 13, 2009Date of Patent: November 13, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8285915Abstract: Relocating data in a virtualized environment maintained by a hypervisor administering access to memory with a Cache Page Table (‘CPT’) and a Physical Page Table (‘PPT’), the CPT and PPT including virtual to physical mappings. Relocating data includes converting the virtual to physical mappings of the CPT to virtual to logical mappings; establishing a Logical Memory Block (‘LMB’) relocation tracker that includes logical addresses of an LMB, source physical addresses of the LMB, target physical addresses of the LMB, a translation block indicator for each relocation granule, and a pin count associated with each relocation granule; establishing a PPT entry tracker including PPT entries corresponding to the LMB to be relocated; relocating the LMB in a number of relocation granules including blocking translations to the relocation granules during relocation; and removing the logical addresses from the LMB relocation tracker.Type: GrantFiled: January 13, 2010Date of Patent: October 9, 2012Assignee: International Business Machines CorporationInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8281082Abstract: Hypervisor page fault processing logic is provided for a shared memory partition data processing system. The logic, responsive to an executing virtual processor of the shared memory partition data processing system encountering a hypervisor page fault, allocates an input/output (I/O) paging request to the virtual processor from an I/O paging request pool and increments an outstanding I/O paging request count for the virtual processor. A determination is then made whether the outstanding I/O paging request count for the virtual processor is at a predefined threshold, and if not, the logic places the virtual processor in a wait state with interrupt wake-up reasons enabled based on the virtual processor's state, otherwise, it places the virtual processor in a wait state with interrupt wake-up reasons disabled.Type: GrantFiled: January 31, 2012Date of Patent: October 2, 2012Assignee: International Business Machines CorporationInventors: David A. Larson, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20120131260Abstract: Hypervisor page fault processing logic is provided for a shared memory partition data processing system. The logic, responsive to an executing virtual processor of the shared memory partition data processing system encountering a hypervisor page fault, allocates an input/output (I/O) paging request to the virtual processor from an I/O paging request pool and increments an outstanding I/O paging request count for the virtual processor. A determination is then made whether the outstanding I/O paging request count for the virtual processor is at a predefined threshold, and if not, the logic places the virtual processor in a wait state with interrupt wake-up reasons enabled based on the virtual processor's state, otherwise, it places the virtual processor in a wait state with interrupt wake-up reasons disabled.Type: ApplicationFiled: January 31, 2012Publication date: May 24, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: David A. LARSON, Edward C. PROSSER, Kenneth C. VOSSEN
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Patent number: 8166254Abstract: Hypervisor page fault processing logic is provided for a shared memory partition data processing system. The logic, responsive to an executing virtual processor of the shared memory partition data processing system encountering a hypervisor page fault, allocates an input/output (I/O) paging request to the virtual processor from an I/O paging request pool and increments an outstanding I/O paging request count for the virtual processor. A determination is then made whether the outstanding I/O paging request count for the virtual processor is at a predefined threshold, and if not, the logic places the virtual processor in a wait state with interrupt wake-up reasons enabled based on the virtual processor's state, otherwise, it places the virtual processor in a wait state with interrupt wake-up reasons disabled.Type: GrantFiled: March 13, 2009Date of Patent: April 24, 2012Assignee: International Business Machines CorporationInventors: David A. Larson, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20120079230Abstract: In an embodiment, a target number of discretionary pages is calculated for a first partition. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: ApplicationFiled: November 30, 2011Publication date: March 29, 2012Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Patent number: 8090911Abstract: In an embodiment, a target number of discretionary pages for a first partition is calculated as a function of a number of physical page table faults, a number of sampled page faults, a number of shared physical page pool faults, a number of re-page-ins, and a ratio of pages. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: GrantFiled: April 16, 2009Date of Patent: January 3, 2012Assignee: International Business Machines CorporationInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20110173370Abstract: Relocating data in a virtualized environment maintained by a hypervisor administering access to memory with a Cache Page Table (‘CPT’) and a Physical Page Table (‘PPT’), the CPT and PPT including virtual to physical mappings. Relocating data includes converting the virtual to physical mappings of the CPT to virtual to logical mappings; establishing a Logical Memory Block (‘LMB’) relocation tracker that includes logical addresses of an LMB, source physical addresses of the LMB, target physical addresses of the LMB, a translation block indicator for each relocation granule, and a pin count associated with each relocation granule; establishing a PPT entry tracker including PPT entries corresponding to the LMB to be relocated; relocating the LMB in a number of relocation granules including blocking translations to the relocation granules during relocation; and removing the logical addresses from the LMB relocation tracker.Type: ApplicationFiled: January 13, 2010Publication date: July 14, 2011Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20100268907Abstract: In an embodiment, a target number of discretionary pages for a first partition is calculated as a function of a number of physical page table faults, a number of sampled page faults, a number of shared physical page pool faults, a number of re-page-ins, and a ratio of pages. If the target number of discretionary pages for the first partition is less than a number of the discretionary pages that are allocated to the first partition, a result page is found that is allocated to the first partition and the result page is deallocated from the first partition. If the target number of discretionary pages for the first partition is greater than the number of the discretionary pages that are allocated to the first partition, a free page is allocated to the first partition.Type: ApplicationFiled: April 16, 2009Publication date: October 21, 2010Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20090307436Abstract: Hypervisor page fault processing logic is provided for a shared memory partition data processing system. The logic, responsive to an executing virtual processor of the shared memory partition data processing system encountering a hypervisor page fault, allocates an input/output (I/O) paging request to the virtual processor from an I/O paging request pool and increments an outstanding I/O paging request count for the virtual processor. A determination is then made whether the outstanding I/O paging request count for the virtual processor is at a predefined threshold, and if not, the logic places the virtual processor in a wait state with interrupt wake-up reasons enabled based on the virtual processor's state, otherwise, it places the virtual processor in a wait state with interrupt wake-up reasons disabled.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: David A. Larson, Edward C. Prosser, Kenneth C. Vossen
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Publication number: 20090307439Abstract: Dynamic control of memory affinity is provided for a shared memory logical partition within a shared memory partition data processing system having a plurality of nodes. The memory affinity control approach includes: determining one or more home node assignments for the shared memory logical partition, with each assigned home node being one node of the plurality of nodes of the system; determining a desired physical page level per node for the shared memory logical partition; and allowing the shared memory partition to run and using the home node assignment(s) and its desired physical page level(s) in the dispatching of tasks to physical processors in the nodes and in hypervisor page memory management to dynamically control memory affinity of the shared memory logical partition in the data processing system.Type: ApplicationFiled: March 13, 2009Publication date: December 10, 2009Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Stuart Z. Jacobs, David A. Larson, Wade B. Ouren, Edward C. Prosser, Kenneth C. Vossen