Patents by Inventor Benjamin A. Leis
Benjamin A. Leis 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: 20240111442Abstract: Systems, apparatuses, and methods for prefetching data by a display controller. From time to time, a performance-state change of a memory are performed. During such changes, a memory clock frequency is changed for a memory subsystem storing frame buffer(s) used to drive pixels to a display device. During the performance-state change, memory accesses may be temporarily blocked. To sustain a desired quality of service for the display, a display controller is configured to prefetch data in advance of the performance-state change. In order to ensure the display controller has sufficient memory bandwidth to accomplish the prefetch, bandwidth reduction circuitry in clients of the system are configured to temporarily reduce memory bandwidth of corresponding clients.Type: ApplicationFiled: September 29, 2022Publication date: April 4, 2024Inventors: Ashish Jain, Shang Yang, Jun Lei, Gia Tung Phan, Oswin Hall, Benjamin Tsien, Narendra Kamat
-
Publication number: 20240103754Abstract: Systems, apparatuses, and methods for prefetching data by a display controller. From time to time, a performance-state change of a memory are performed. During such changes, a memory clock frequency is changed for a memory subsystem storing frame buffer(s) used to drive pixels to a display device. During the performance-state change, memory accesses may be temporarily blocked. In order to reduce visual artifacts that may occur while the memory accesses are blocked, a memory subsystem includes a control circuit configured to enable a caching mode which caches display data provided to the display controller. Subsequent requests for display data from the display controller are then serviced using the cached data instead of accessing memory.Type: ApplicationFiled: September 28, 2022Publication date: March 28, 2024Inventors: Gia Tung Phan, Ashish Jain, Chintan S. Patel, Benjamin Tsien, Jun Lei, Shang Yang, Oswin Hall
-
Patent number: 11200198Abstract: The described technology is generally directed towards domains that data services can use to collect files of a global filesystem namespace into groups, and domains that can be used to exclude certain files or metadata. A data service (a domain patron) creates a domain, e.g., for a particular directory, and a domain manager associates files under that directory with domain membership information. The data service can relate exclusion information to the domain, e.g., to exclude part of the directory. This can be done by an exclusion domain instance, e.g., a child to a parent domain, or can be done in metadata, by having the data service (e.g., a snapshot data service) exclude certain metadata such as snapshot identifiers from a larger set of snapshot identifiers.Type: GrantFiled: February 1, 2019Date of Patent: December 14, 2021Assignee: EMC IP HOLDING COMPANY LLCInventors: Benjamin A. Leis, Mayank Rajawat, Barry Naujok, Kiran Ballal
-
Publication number: 20200250135Abstract: The described technology is generally directed towards domains that data services can use to collect files of a global filesystem namespace into groups, and domains that can be used to exclude certain files or metadata. A data service (a domain patron) creates a domain, e.g., for a particular directory, and a domain manager associates files under that directory with domain membership information. The data service can relate exclusion information to the domain, e.g., to exclude part of the directory. This can be done by an exclusion domain instance, e.g., a child to a parent domain, or can be done in metadata, by having the data service (e.g., a snapshot data service) exclude certain metadata such as snapshot identifiers from a larger set of snapshot identifiers.Type: ApplicationFiled: February 1, 2019Publication date: August 6, 2020Inventors: Benjamin A. Leis, Mayank Rajawat, Barry Naujok, Kiran Ballal
-
Patent number: 8386434Abstract: A method for establishing and maintaining a differential snapshot of a set of files stored on a volume is disclosed. The invention achieves processing time and disk space optimizations by avoiding copy-on-write operations for logically insignificant moves of blocks, such as the block rearrangements characteristic of defragmentation utilities. A file system enhancement enabling the passing of a block copy command from the file system to lower-level drivers, is used to inform the snapshotter that a block move operation is not logically meaningful. When the logically insignificant move is of a block whose data forms part of the data captured in the snapshot virtual volume, and when the move is to a block location that is functioning as logical free space, the snapshotter can simply modify its block bitmap and update translation table entries without needing to perform a copy-on-write.Type: GrantFiled: December 23, 2009Date of Patent: February 26, 2013Assignee: Microsoft CorporationInventors: Norbert P. Kusters, Benjamin A. Leis, Mark J. Zbikowski
-
Publication number: 20120311804Abstract: The invention seeks to provide a hand-mounted cleaning tool comprising a palm portion and a finger-covering portion, wherein the finger-covering portion is provided with a scouring surface on a back side thereof.Type: ApplicationFiled: February 27, 2012Publication date: December 13, 2012Inventor: Benjamin Leis
-
Patent number: 7984438Abstract: A computing device has a hardware device employed to provide a hardware service to the computing device and a plurality of virtual machines including a host virtual machine (VM-H) to which the hardware device is assigned, and a client virtual machine (VM-C) that can consume the hardware service by way of the VM-H. The VM-C includes an emulating stack and an enlightened stack. The emulating stack interfaces an application requesting the hardware service with a trap in a virtualization layer of the computing device which re-directs the request to the VM-H. The enlightened stack interfaces the application with the VM-H and bypasses the virtualization layer. The emulating stack includes a shunt driver that shunts to the enlightened stack each request from the application directed to the emulating stack.Type: GrantFiled: February 8, 2006Date of Patent: July 19, 2011Assignee: Microsoft CorporationInventors: Benjamin A. Leis, Jacob Oshins, Parag Chakraborty
-
Patent number: 7941800Abstract: A computing device has a virtual machine bus (VM bus) operable in a pipe mode where all incoming data written to the VM bus from a source is passed through to be read from the VM bus by a sink, and a plurality of instantiated virtual machines (VMs). Each VM hosts an instance of an operating system upon an application may be instantiated. Each VM includes a computing object for issuing a call to a component object of another VM, and a VM bus system object for receiving the call and communicating same to a VM bus system object of the another VM by way of the VM bus. The VM bus system object is also for receiving the call from the VM bus system object of the another VM by way of the VM bus and for communicating the received call to the computing object.Type: GrantFiled: February 23, 2006Date of Patent: May 10, 2011Assignee: Microsoft CorporationInventors: Benjamin A. Leis, Jacob Oshins, Christopher Eck
-
Patent number: 7761578Abstract: A computer system and method for communicating in a virtual environment. The computer system may include a first partition and a virtual service client implemented at a first position in the first partition. The computer system may also include a second partition, and a virtual service provider implemented at a second position in the second partition. The first partition and the second partition may be in operative communication via the virtual service client and the virtual service provider. The first position and the second position may enable the virtual service client and the virtual service provider to reduce processing overhead associated with communicating in the virtual environment by eliminating a processing step, a buffer copy, a software interrupt, and/or a context switch.Type: GrantFiled: April 28, 2006Date of Patent: July 20, 2010Assignee: Microsoft CorporationInventors: Brian L. Henry, Pankaj Garg, Jeffrey Brian Kinsey, Benjamin A. Leis, Parag Chakraborty
-
Publication number: 20100100701Abstract: A method for establishing and maintaining a differential snapshot of a set of files stored on a volume is disclosed. The invention achieves processing time and disk space optimizations by avoiding copy-on-write operations for logically insignificant moves of blocks, such as the block rearrangements characteristic of defragmentation utilities. A file system enhancement enabling the passing of a block copy command from the file system to lower-level drivers, is used to inform the snapshotter that a block move operation is not logically meaningful. When the logically insignificant move is of a block whose data forms part of the data captured in the snapshot virtual volume, and when the move is to a block location that is functioning as logical free space, the snapshotter can simply modify its block bitmap and update translation table entries without needing to perform a copy-on-write.Type: ApplicationFiled: December 23, 2009Publication date: April 22, 2010Applicant: MICROSOFT CORPORATIONInventors: NORBERT P. KUSTERS, BENJAMIN A. LEIS, MARK J. ZBIKOWSKI
-
Patent number: 7664771Abstract: A differential snapshot is established and maintained for a set of files stored on a volume. Copy-on-write operations are avoided for logically insignificant moves of blocks, such as the block rearrangements characteristic of defragmentation utilities. A file system passes a block copy command to lower-level drivers that are to inform the snapshotter that a block move operation is not logically meaningful. When the logically insignificant move is of a block whose data forms part of the data captured in the snapshot virtual volume, and when the move is to a block location that is functioning as logical free space, the snapshotter can simply modify its block bitmap and update translation table entries without needing to perform a copy-on-write.Type: GrantFiled: October 14, 2003Date of Patent: February 16, 2010Assignee: Microsoft CorporationInventors: Norbert P. Kusters, Benjamin A. Leis, Mark J. Zbikowski
-
Patent number: 7647468Abstract: A computing device is partitioned to include a host partition (HP) instantiated at least in part to provide storage capabilities, and also to include a client partition (CP) instantiated at least in part to consume such storage capabilities of the HP in the form of a virtual storage device at the CP. The HP implements the virtual storage device of the CP as an image file on a physical storage device. The image file at the HP is compacted while the CP is active and employing the corresponding virtual storage device.Type: GrantFiled: April 21, 2006Date of Patent: January 12, 2010Assignee: Microsoft CorporationInventors: Benjamin A. Leis, Parag Chakraborty
-
Patent number: 7523343Abstract: A file system enables the real-time correction of detected corruptions to on-disk data. An enhancement to a file system responds in real time to file system corruptions detected on a running volume, and repairs the corruptions at the point where the file system detects them. Upon detection of a corruption by the file system, the system enhancement records information describing the nature of the corruption. A repair scan is defined for each type of corruption encountered. Repair scans can be run at the top level of execution in the current thread in which the corruption is detected, or they may require a dedicated thread to service the repair operation.Type: GrantFiled: September 30, 2004Date of Patent: April 21, 2009Assignee: Microsoft CorporationInventors: Benjamin A. Leis, Brian D. Andrew, Daniel W. H. Chan, Mark J. Zbikowski, Vishal V. Ghotge, Thomas J. Miller
-
Patent number: 7325115Abstract: An operating system copies data from memory pages into a paging file on disk, in order to free up space in the memory. A mechanism is disclosed that causes the data to be encrypted as it is copied into the paging file, thereby protecting the paged data from unauthorized (or otherwise undesired) observation. The data that is stored in the paging file is encrypted with a session key, that is generated shortly after the machine on which the paging file exists is started. The session key, which is used both for encryption and decryption of the paging file data, is stored in volatile memory, so that the key is not persisted across boots of the machine. Since the key is not persisted across boots, old paging file data that was stored prior to the most recent boot cannot be recovered in clear text, thereby protecting the data from observation.Type: GrantFiled: November 25, 2003Date of Patent: January 29, 2008Assignee: Microsoft CorporationInventors: Benjamin A. Leis, David B. Cross, Duncan G. Bryce, Jianrong Gu, Rajeev Y. Nagar, Scott A. Field
-
Publication number: 20070260831Abstract: Physical (or prior virtual) machine volumes can be converted to virtual machines at a virtual machine host while the physical machines are running. In one implementation, a volume shadow copy service can be used to create an application (and/or file system)-consistent snapshot of one or more physical machine volumes while the one or more volumes are running. The snapshot data can then be transferred to a mounted virtual hard disk file (dynamic or fixed) at a virtual machine host. Operational information (e.g., boot record, system registry, drivers, devices, configuration preferences, etc.) associated with the virtual hard disk file and the operating system(s) within the virtual machine can then be modified as appropriate to ensure that the corresponding virtual machine is bootable and functional at the virtual machine host. The virtual hard disk file can then be un-mounted, and used as a new virtual machine.Type: ApplicationFiled: May 8, 2006Publication date: November 8, 2007Applicant: Microsoft CorporationInventors: Michael Michael, William Scheidel, Benjamin Leis, Karan Mehra, Venkatasubrahmanyam Raman, Natalia Varava
-
Publication number: 20070253436Abstract: A computer system and method for communicating in a virtual environment. The computer system may include a first partition and a virtual service client implemented at a first position in the first partition. The computer system may also include a second partition, and a virtual service provider implemented at a second position in the second partition. The first partition and the second partition may be in operative communication via the virtual service client and the virtual service provider. The first position and the second position may enable the virtual service client and the virtual service provider to reduce processing overhead associated with communicating in the virtual environment by eliminating a processing step, a buffer copy, a software interrupt, and/or a context switch.Type: ApplicationFiled: April 28, 2006Publication date: November 1, 2007Applicant: Microsoft CorporationInventors: Brian Henry, Pankaj Garg, Jeffrey Kinsey, Benjamin Leis, Parag Chakraborty
-
Publication number: 20070198976Abstract: A computing device has a virtual machine bus (VM bus) operable in a pipe mode where all incoming data written to the VM bus from a source is passed through to be read from the VM bus by a sink, and a plurality of instantiated virtual machines (VMs). Each VM hosts an instance of an operating system upon an application may be instantiated. Each VM includes a computing object for issuing a call to a component object of another VM, and a VM bus system object for receiving the call and communicating same to a VM bus system object of the another VM by way of the VM bus. The VM bus system object is also for receiving the call from the VM bus system object of the another VM by way of the VM bus and for communicating the received call to the computing object.Type: ApplicationFiled: February 23, 2006Publication date: August 23, 2007Applicant: Microsoft CorporationInventors: Benjamin Leis, Jacob Oshins, Christopher Eck
-
Publication number: 20070198243Abstract: A computing device has a hardware device employed to provide a hardware service to the computing device and a plurality of virtual machines including a host virtual machine (VM-H) to which the hardware device is assigned, and a client virtual machine (VM-C) that can consume the hardware service by way of the VM-H. The VM-C includes an emulating stack and an enlightened stack. The emulating stack interfaces an application requesting the hardware service with a trap in a virtualization layer of the computing device which re-directs the request to the VM-H. The enlightened stack interfaces the application with the VM-H and bypasses the virtualization layer. The emulating stack includes a shunt driver that shunts to the enlightened stack each request from the application directed to the emulating stack.Type: ApplicationFiled: February 8, 2006Publication date: August 23, 2007Applicant: Microsoft CorporationInventors: Benjamin Leis, Jacob Oshins, Parag Chakraborty
-
Publication number: 20070136551Abstract: A computing device is partitioned to include a host partition (HP) instantiated at least in part to provide storage capabilities, and also to include a client partition (CP) instantiated at least in part to consume such storage capabilities of the HP in the form of a virtual storage device at the CP. The HP implements the virtual storage device of the CP as an image file on a physical storage device. The image file at the HP is compacted while the CP is active and employing the corresponding virtual storage device.Type: ApplicationFiled: April 21, 2006Publication date: June 14, 2007Applicant: Microsoft CorporationInventors: Benjamin Leis, Parag Chakraborty
-
Publication number: 20050246612Abstract: A file system enables the real-time correction of detected corruptions to on-disk data. An enhancement to a file system responds in real time to file system corruptions detected on a running volume, and repairs the corruptions at the point where the file system detects them. Upon detection of a corruption by the file system, the system enhancement records information describing the nature of the corruption. A repair scan is defined for each type of corruption encountered. Repair scans can be run at the top level of execution in the current thread in which the corruption is detected, or they may require a dedicated thread to service the repair operation.Type: ApplicationFiled: September 30, 2004Publication date: November 3, 2005Applicant: Microsoft CorporationInventors: Benjamin Leis, Brian Andrew, Daniel Chan, Mark Zbikowski, Vishal Ghotge, Thomas Miller