Patents by Inventor Srinivas KOTTA
Srinivas KOTTA 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: 10255209Abstract: Embodiments of the present invention disclose a method, computer program product, and system for determining statistics corresponding to data transfer operations. In one embodiment, the computer implemented method includes the steps of receiving a request from an input/output (I/O) device to perform a data transfer operation between the I/O device and a memory, generating an entry in an input/output memory management unit (IOMMU) corresponding to the data transfer operation, wherein the entry in the IOMMU includes at least an indication of a processor chip that corresponds to the memory of the data transfer operation, monitoring the data transfer operation between the I/O device and the memory, determining statistics corresponding to the monitored data transfer operation, wherein the determined statistics include at least: the I/O device that performed the data transfer operation, the processor chip that corresponds to the memory of the data transfer operation, and an amount of data transferred.Type: GrantFiled: February 7, 2017Date of Patent: April 9, 2019Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 10223284Abstract: A system can translate an input/output (I/O) direct memory access (DMA) address to a physical system memory address in a data processing system. In response to receiving a DMA packet containing a requester identity (RID) associated with a partitionable endpoint (PE) number and an I/O DMA address, the system can retrieve an entry associated with the RID from a first translation validation table (TVT). Using that entry, the system can validate the number of TVT entries and extract from the I/O DMA address an offset. This offset can be validated and used to retrieve an entry in a second TVT. Data from this entry can be validated and the system can use this to access another table to retrieve the translation to the physical system memory address.Type: GrantFiled: July 14, 2015Date of Patent: March 5, 2019Assignee: International Business Machines CorporationInventors: Rama K. Hazari, Sakethan R. Kotta, Srinivas Kotta, Eric N. Lais
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Patent number: 10031769Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: GrantFiled: September 15, 2017Date of Patent: July 24, 2018Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Patent number: 10025616Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: GrantFiled: September 15, 2017Date of Patent: July 17, 2018Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Patent number: 9990319Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: GrantFiled: April 8, 2016Date of Patent: June 5, 2018Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 9990318Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: GrantFiled: January 28, 2016Date of Patent: June 5, 2018Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Publication number: 20180004566Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: ApplicationFiled: September 15, 2017Publication date: January 4, 2018Inventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Publication number: 20180004565Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: ApplicationFiled: September 15, 2017Publication date: January 4, 2018Inventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Patent number: 9766916Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: GrantFiled: May 5, 2014Date of Patent: September 19, 2017Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Publication number: 20170147519Abstract: Embodiments of the present invention disclose a method, computer program product, and system for determining statistics corresponding to data transfer operations. In one embodiment, the computer implemented method includes the steps of receiving a request from an input/output (I/O) device to perform a data transfer operation between the I/O device and a memory, generating an entry in an input/output memory management unit (IOMMU) corresponding to the data transfer operation, wherein the entry in the IOMMU includes at least an indication of a processor chip that corresponds to the memory of the data transfer operation, monitoring the data transfer operation between the I/O device and the memory, determining statistics corresponding to the monitored data transfer operation, wherein the determined statistics include at least: the I/O device that performed the data transfer operation, the processor chip that corresponds to the memory of the data transfer operation, and an amount of data transferred.Type: ApplicationFiled: February 7, 2017Publication date: May 25, 2017Inventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 9619413Abstract: Embodiments of the present invention disclose a method, computer program product, and system for determining statistics corresponding to data transfer operations. In one embodiment, the computer implemented method includes the steps of receiving a request from an input/output (I/O) device to perform a data transfer operation between the I/O device and a memory, generating an entry in an input/output memory management unit (IOMMU) corresponding to the data transfer operation, wherein the entry in the IOMMU includes at least an indication of a processor chip that corresponds to the memory of the data transfer operation, monitoring the data transfer operation between the I/O device and the memory, determining statistics corresponding to the monitored data transfer operation, wherein the determined statistics include at least: the I/O device that performed the data transfer operation, the processor chip that corresponds to the memory of the data transfer operation, and an amount of data transferred.Type: GrantFiled: April 29, 2014Date of Patent: April 11, 2017Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 9588917Abstract: Embodiments of the present invention disclose a method, computer program product, and system for determining statistics corresponding to data transfer operations. In one embodiment, the computer implemented method includes the steps of receiving a request from an input/output (I/O) device to perform a data transfer operation between the I/O device and a memory, generating an entry in an input/output memory management unit (IOMMU) corresponding to the data transfer operation, wherein the entry in the IOMMU includes at least an indication of a processor chip that corresponds to the memory of the data transfer operation, monitoring the data transfer operation between the I/O device and the memory, determining statistics corresponding to the monitored data transfer operation, wherein the determined statistics include at least: the I/O device that performed the data transfer operation, the processor chip that corresponds to the memory of the data transfer operation, and an amount of data transferred.Type: GrantFiled: June 23, 2014Date of Patent: March 7, 2017Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Publication number: 20170017579Abstract: A system can translate an input/output (I/O) direct memory access (DMA) address to a physical system memory address in a data processing system. In response to receiving a DMA packet containing a requester identity (RID) associated with a partitionable endpoint (PE) number and an I/O DMA address, the system can retrieve an entry associated with the RID from a first translation validation table (TVT). Using that entry, the system can validate the number of TVT entries and extract from the I/O DMA address an offset. This offset can be validated and used to retrieve an entry in a second TVT. Data from this entry can be validated and the system can use this to access another table to retrieve the translation to the physical system memory address.Type: ApplicationFiled: July 14, 2015Publication date: January 19, 2017Inventors: Rama K. Hazari, Sakethan R. Kotta, Srinivas Kotta, Eric N. Lais
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Patent number: 9501308Abstract: A method, system and computer program product are provided for implementing coherent accelerator function isolation for virtualization in an input/output (IO) adapter in a computer system. A coherent accelerator provides accelerator function units (AFUs), each AFU is adapted to operate independently of the other AFUs to perform a computing task that can be implemented within application software on a processor. The AFU has access to system memory bound to the application software and is adapted to make copies of that memory within AFU memory-cache in the AFU. As part of this memory coherency domain, each of the AFU memory-cache and processor memory-cache is adapted to be aware of changes to data commonly in either cache as well as data changed in memory of which the respective cache contains a copy.Type: GrantFiled: February 20, 2015Date of Patent: November 22, 2016Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Srinivas Kotta, Gregory M. Nordstrom, Timothy J. Schimke
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Publication number: 20160224494Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: ApplicationFiled: April 8, 2016Publication date: August 4, 2016Inventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 9361143Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: GrantFiled: June 20, 2014Date of Patent: June 7, 2016Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Publication number: 20160147700Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: ApplicationFiled: January 28, 2016Publication date: May 26, 2016Inventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan
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Patent number: 9348759Abstract: DMA translation table entries include a consecutive count (CC) field that indicates how many subsequent translation table entries point to successive real page numbers. A DMA address translation mechanism stores a value in the CC field when a translation table entry is stored, and updates the CC field in other affected translation table entries as well. When a translation table entry is read, and the CC field is non-zero, the DMA controller can use multiple RPNs from the access to the single translation table entry. Thus, if a translation table entry has a value of 2 in the CC field, the DMA address translation mechanism knows it can access the real page number (RPN) corresponding to the translation table entry, and also knows it can access the two subsequent RPNs without the need of reading the next two subsequent translation table entries.Type: GrantFiled: August 29, 2013Date of Patent: May 24, 2016Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Gregory M. Nordstrom, Srinivas Kotta, Eric N. Lais
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Patent number: 9317442Abstract: DMA translation table entries include a consecutive count (CC) field that indicates how many subsequent translation table entries point to successive real page numbers. A DMA address translation mechanism stores a value in the CC field when a translation table entry is stored, and updates the CC field in other affected translation table entries as well. When a translation table entry is read, and the CC field is non-zero, the DMA controller can use multiple RPNs from the access to the single translation table entry. Thus, if a translation table entry has a value of 2 in the CC field, the DMA address translation mechanism knows it can access the real page number (RPN) corresponding to the translation table entry, and also knows it can access the two subsequent RPNs without the need of reading the next two subsequent translation table entries.Type: GrantFiled: April 14, 2014Date of Patent: April 19, 2016Assignee: International Business Machines CorporationInventors: Jesse P. Arroyo, Gregory M. Nordstrom, Srinivas Kotta, Eric N. Lais
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Patent number: 9304799Abstract: Tracking data transfers in an input/output adapter card system to determine whether the adapter cards are well-placed with respect to the components (for example dynamic random access memories) with which the adapter cards respectively are observed to communicate data. Some embodiments use a heuristic value for each adapter card in the system based on inter node transfers and intra node transfers, which are separately weighted and summed over some predetermined time interval in order to obtain the heuristic value.Type: GrantFiled: December 27, 2013Date of Patent: April 5, 2016Assignee: International Business Machines CorporationInventors: Srinivas Kotta, Mehulkumar J. Patel, Venkatesh Sainath, Vaidyanathan Srinivasan