Patents by Inventor Timothy P. Mann
Timothy P. Mann 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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Patent number: 11960357Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: GrantFiled: April 24, 2023Date of Patent: April 16, 2024Assignee: VMware LLCInventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P. Mann, Frederick Joseph Jacobs
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Publication number: 20230259421Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: ApplicationFiled: April 24, 2023Publication date: August 17, 2023Inventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P. Mann, Frederick Joseph Jacobs
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Publication number: 20230229480Abstract: Disclosed are various examples of provisioning a data processing unit (DPU) management operating system using a capsule. A management hypervisor installer executed on a host device receives a listing DPU device from a baseboard management controller (BMC). A preinstalled DPU management operating system image is identified for a DPU device from the listing, and is wrapped with a capsule that specifies the capsule as a DPU management operating system image capsule. A server component provides the DPU management operating system image capsule at a particular URI, and the URI is transmitted to the BMC.Type: ApplicationFiled: March 25, 2022Publication date: July 20, 2023Inventors: Andrei Warkentin, Karthik Ramachandra, Timothy P. Mann, Jared McNeill, Sunil Kotian, Cyprien Laplace, David A. Dunn
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Patent number: 11669388Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: GrantFiled: October 5, 2021Date of Patent: June 6, 2023Assignee: VMware, Inc.Inventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P Mann, Frederick Joseph Jacobs
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Constructing a UEFI bootloader handoff address space for a physical machine hosting virtual machines
Patent number: 11340909Abstract: A method of creating a new page table structure after first stage boot operations has completed but before handoff to a hypervisor occurs. Firmware page tables are reused and copied to a region of memory by a first-stage bootloader while the firmware is running, processed to have an expected multi-stage page table structure and desired access rights, and copied again to another region of memory by the first-stage bootloader after the first-stage bootloader has completed its booting operations and after the firmware has been quiesced.Type: GrantFiled: July 23, 2019Date of Patent: May 24, 2022Assignee: VMware, Inc.Inventors: Andrei Warkentin, Timothy P. Mann, Doug Covelli -
Publication number: 20220027231Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: ApplicationFiled: October 5, 2021Publication date: January 27, 2022Inventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P Mann, Frederick Joseph Jacobs
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Patent number: 11169870Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: GrantFiled: January 15, 2020Date of Patent: November 9, 2021Assignee: VMware, Inc.Inventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P. Mann, Frederick Joseph Jacobs
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Publication number: 20210216394Abstract: Techniques for migrating virtual machines (VMs) in the presence of uncorrectable memory errors are provided. According to one set of embodiments, a source host hypervisor of a source host system can determine, for each guest memory page of a VM to be migrated from the source host system to a destination host system, whether the guest memory page is impacted by an uncorrectable memory error in a byte-addressable memory of the source host system. If the source host hypervisor determines that the guest memory page is impacted, the source host hypervisor can transmit a data packet to a destination host hypervisor of the destination host system that includes error metadata identifying the guest memory page as being corrupted. Alternatively, if the source host hypervisor determines that the guest memory page is not impacted, the source host hypervisor can attempt to read the guest memory page from the byte-addressable memory in a memory exception-safe manner.Type: ApplicationFiled: January 15, 2020Publication date: July 15, 2021Inventors: Sowgandh Sunil Gadi, Rajesh Venkatasubramanian, Venkata Subhash Reddy Peddamallu, Arunachalam Ramanathan, Timothy P. Mann, Frederick Joseph Jacobs
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Publication number: 20210026647Abstract: A method of creating a new page table structure after first stage boot operations has completed but before handoff to a hypervisor occurs. Firmware page tables are reused and copied to a region of memory by a first-stage bootloader while the firmware is running, processed to have an expected multi-stage page table structure and desired access rights, and copied again to another region of memory by the first-stage bootloader after the first-stage bootloader has completed its booting operations and after the firmware has been quiesced.Type: ApplicationFiled: July 23, 2019Publication date: January 28, 2021Inventors: Andrei WARKENTIN, Timothy P. MANN, Doug COVELLI
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Patent number: 10592669Abstract: A computer system is securely booted by executing a boot firmware to locate a boot loader and verify the boot loader using a first key that is associated with the boot firmware. Upon verifying the boot loader, computer system executes the boot loader to verify a system software kernel and a secure boot verifier using a second key that is associated with the boot loader. The secure boot verifier is then executed to verify the remaining executable software modules to be loaded during boot using a third key that is associated with the secure boot verifier. During boot, state data files of the computer system are mounted in a namespace that is isolated from the namespaces in which the executable software modules are mounted.Type: GrantFiled: June 23, 2016Date of Patent: March 17, 2020Assignee: VMware, Inc.Inventors: Mukund Gunti, Timothy P. Mann
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Patent number: 10242196Abstract: A computer system is securely booted by executing a boot firmware to locate a boot loader and verify the boot loader using a first key that is associated with the boot firmware. Upon verifying the boot loader, computer system executes the boot loader to verify a system software kernel and a secure boot verifier using a second key that is associated with the boot loader. The secure boot verifier is then executed to verify the remaining executable software modules to be loaded during boot using a third key that is associated with the secure boot verifier and a fourth key that is associated with a user of the computer system.Type: GrantFiled: July 29, 2016Date of Patent: March 26, 2019Assignee: VMware, Inc.Inventors: Mukund Gunti, Timothy P. Mann
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Publication number: 20190050046Abstract: A method of reducing power consumption of a server cluster of host systems with virtual machines executing on the host systems is provided. The method includes recommending host system power-on when there is a host system whose utilization is above a target utilization, and recommending host system power-off when there is a host system whose utilization is below the target utilization. Recommending host system power-on includes calculating impact of powering on a standby host system with respect to reducing the number of highly-utilized host systems in the server cluster. Recommending host system power-off includes calculating impact of powering off a host system with respect to decreasing the number of less-utilized host systems in the server cluster.Type: ApplicationFiled: October 15, 2018Publication date: February 14, 2019Inventors: Alok Kumar GUPTA, Minwen JI, Timothy P. MANN, Tahir MOBASHIR, Umit RENCUZOGULLARI, Ganesha SHANMUGANATHAN, Limin WANG, Anne Marie HOLLER
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Patent number: 10185571Abstract: A method of re-mapping memory regions for firmware run-time services to a virtual address space of a kernel executed on a processor, includes the steps of selecting a re-mapping policy for re-mapping the memory regions for the firmware run-time services, creating a new mapping according to the selected re-mapping policy, and making a call to an application programming interface exposed by the firmware to apply the new map and re-map the memory regions for the firmware to the virtual address space of the kernel.Type: GrantFiled: June 8, 2017Date of Patent: January 22, 2019Assignee: VMWARE, INC.Inventors: Andrei Warkentin, Timothy P. Mann, Alexander Fainkichen
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Publication number: 20180357070Abstract: A method of re-mapping memory regions for firmware run-time services to a virtual address space of a kernel executed on a processor, includes the steps of selecting a re-mapping policy for re-mapping the memory regions for the firmware run-time services, creating a new mapping according to the selected re-mapping policy, and making a call to an application programming interface exposed by the firmware to apply the new map and re-map the memory regions for the firmware to the virtual address space of the kernel.Type: ApplicationFiled: June 8, 2017Publication date: December 13, 2018Inventors: Andrei WARKENTIN, Timothy P. MANN, Alexander FAINKICHEN
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Patent number: 10101798Abstract: A method of reducing power consumption of a server cluster of host systems with virtual machines executing on the host systems is provided. The method includes recommending host system power-on when there is a host system whose utilization is above a target utilization, and recommending host system power-off when there is a host system whose utilization is below the target utilization. Recommending host system power-on includes calculating impact of powering on a standby host system with respect to reducing the number of highly-utilized host systems in the server cluster. Recommending host system power-off includes calculating impact of powering off a host system with respect to decreasing the number of less-utilized host systems in the server cluster.Type: GrantFiled: June 2, 2015Date of Patent: October 16, 2018Assignee: VMWare, INC.Inventors: Alok Kumar Gupta, Minwen Ji, Timothy P. Mann, Tahir Mobashir, Umit Rencuzogullari, Ganesha Shanmuganathan, Limin Wang, Anne Marie Holler
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Publication number: 20180032734Abstract: A computer system is securely booted by executing a boot firmware to locate a boot loader and verify the boot loader using a first key that is associated with the boot firmware. Upon verifying the boot loader, computer system executes the boot loader to verify a system software kernel and a secure boot verifier using a second key that is associated with the boot loader. The secure boot verifier is then executed to verify the remaining executable software modules to be loaded during boot using a third key that is associated with the secure boot verifier and a fourth key that is associated with a user of the computer system.Type: ApplicationFiled: July 29, 2016Publication date: February 1, 2018Inventors: Mukund GUNTI, Timothy P. MANN
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Publication number: 20170372074Abstract: A computer system is securely booted by executing a boot firmware to locate a boot loader and verify the boot loader using a first key that is associated with the boot firmware. Upon verifying the boot loader, computer system executes the boot loader to verify a system software kernel and a secure boot verifier using a second key that is associated with the boot loader. The secure boot verifier is then executed to verify the remaining executable software modules to be loaded during boot using a third key that is associated with the secure boot verifier. During boot, state data files of the computer system are mounted in a namespace that is isolated from the namespaces in which the executable software modules are mounted.Type: ApplicationFiled: June 23, 2016Publication date: December 28, 2017Inventors: Mukund GUNTI, Timothy P. MANN
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Publication number: 20170372073Abstract: A computer system is securely booted by executing a boot firmware to locate a boot loader and verify the boot loader using a first key that is associated with the boot firmware. Upon verifying the boot loader, computer system executes the boot loader to verify a system software kernel and a secure boot verifier using a second key that is associated with the boot loader. The secure boot verifier is then executed to verify the remaining executable software modules to be loaded during boot using a third key that is associated with the secure boot verifier.Type: ApplicationFiled: June 23, 2016Publication date: December 28, 2017Inventors: Mukund GUNTI, Timothy P. MANN
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Patent number: 9652298Abstract: Systems and techniques are described for power-aware scheduling. One of the techniques includes monitoring execution of a plurality of groups of software threads executing on a physical machine, wherein the physical machine comprises a physical hardware platform that includes a plurality of processor packages having a plurality of package power states, wherein the plurality of package power states includes an independent package power state; obtaining a respective independent power state measure for each of the processor packages, wherein the independent power state measure provides a measure of a percentage of time the processor package spends in the independent package power state; and adjusting an allocation of the plurality of groups of software threads across the plurality of processor packages based in part on the independent power state measures for the packages.Type: GrantFiled: January 29, 2014Date of Patent: May 16, 2017Assignee: VMware, Inc.Inventors: Qasim Ali, Timothy P. Mann, Haoqiang Zheng
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Publication number: 20160018877Abstract: A method of reducing power consumption of a server cluster of host systems with virtual machines executing on the host systems is provided. The method includes recommending host system power-on when there is a host system whose utilization is above a target utilization, and recommending host system power-off when there is a host system whose utilization is below the target utilization. Recommending host system power-on includes calculating impact of powering on a standby host system with respect to reducing the number of highly-utilized host systems in the server cluster. Recommending host system power-off includes calculating impact of powering off a host system with respect to decreasing the number of less-utilized host systems in the server cluster.Type: ApplicationFiled: June 2, 2015Publication date: January 21, 2016Inventors: Alok Kumar GUPTA, Minwen JI, Timothy P. MANN, Tahir MOBASHIR, Umit RENCUZOGULLARI, Ganesha SHANMUGANATHAN, Limin WANG, Anne Marie HOLLER