Patents by Inventor Alexandre P. Ferreira

Alexandre P. Ferreira 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: 10896059
    Abstract: Dynamically allocating cache in a multi-tenant infrastructure includes monitoring cache usage for multiple workloads in a multi-tenant processing infrastructure to determine a workload phase. A baseline performance level per workload is determined. The baseline performance level is dependent upon the workload phase. The workloads for each tenant are categorized based on cache utilization and the cache is allocated to each workload based on the baseline performance level, cache utilization, and system wide cache capacity.
    Type: Grant
    Filed: March 13, 2017
    Date of Patent: January 19, 2021
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Wesley M. Felter, Alexandre P. Ferreira, Karthick Rajamani, Juan C. Rubio, Cong Xu
  • Publication number: 20180260330
    Abstract: Dynamically allocating cache in a multi-tenant infrastructure includes monitoring cache usage for multiple workloads in a multi-tenant processing infrastructure to determine a workload phase. A baseline performance level per workload is determined. The baseline performance level is dependent upon the workload phase. The workloads for each tenant are categorized based on cache utilization and the cache is allocated to each workload based on the baseline performance level, cache utilization, and system wide cache capacity.
    Type: Application
    Filed: March 13, 2017
    Publication date: September 13, 2018
    Inventors: Wesley M. Felter, Alexandre P. Ferreira, Karthick Rajamani, Juan C. Rubio, Cong Xu
  • Patent number: 9286959
    Abstract: A memory is provided that comprises a bank of non-volatile memory cells configured into a plurality of banklets. Each banklet in the plurality of banklets can be enabled separately and independently of the other banklets in the bank of non-volatile memory cells. The memory further comprises peripheral banklet circuitry, coupled to the bank of a non-volatile memory array, that is configured to enable selected subsets of bit lines within a selected banklet within the plurality of banklets. Moreover, the memory comprises banklet select circuitry, coupled to the peripheral banklet circuitry, that is configured to select data associated with a selected banklet for reading out from the banklet or writing to the banklet.
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: March 15, 2016
    Assignee: International Business Machines Corporation
    Inventors: Alexandre P. Ferreira, Jente B. Kuang, Janani Mukundan, Karthick Rajamani
  • Patent number: 9135577
    Abstract: A mechanism is provided for statistical determination of power circuit connectivity based on signal detection in a circuit. Signal data from the circuit gathered and a determination is made as to whether a signal of interest is present in the gathered signal data from the circuit using a statistical analysis of the gathered signal data. The statistical analysis comprises using a mean current value and statistical deviation of the current value of the signal data over a predetermined period of time to compute a confidence range. The confidence range is compared to a first threshold and a second threshold. A determination is made that the signal is present in response to the confidence range being above the first threshold. A determination is made that the signal is not present in response to the confidence range being below the second threshold.
    Type: Grant
    Filed: October 10, 2012
    Date of Patent: September 15, 2015
    Assignee: International Business Machines Corporation
    Inventors: Wael R. El-Essawy, Alexandre P. Ferreira, Thomas W. Keller, Jr., Sani R. Nassif, Karthick Rajamani, Juan C. Rubio
  • Patent number: 9081606
    Abstract: A processor includes a processor core, a cache, and a tracker. The processor core is configured to execute persistent write instructions and receive notifications of completed persistent write instructions. The tracker is configured to track the completion state of a persistent write instruction.
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: July 14, 2015
    Assignee: International Business Machines Corporation
    Inventors: Gary D. Carpenter, Stefanie R. Chiras, Alexandre P. Ferreira, Jente B. Kuang, Karthick Rajamani, Freeman L. Rawson, III
  • Publication number: 20150143020
    Abstract: A memory is provided that comprises a bank of non-volatile memory cells configured into a plurality of banklets. Each banklet in the plurality of banklets can be enabled separately and independently of the other banklets in the bank of non-volatile memory cells. The memory further comprises peripheral banklet circuitry, coupled to the bank of a non-volatile memory array, that is configured to enable selected subsets of bit lines within a selected banklet within the plurality of banklets. Moreover, the memory comprises banklet select circuitry, coupled to the peripheral banklet circuitry, that is configured to select data associated with a selected banklet for reading out from the banklet or writing to the banklet.
    Type: Application
    Filed: November 18, 2013
    Publication date: May 21, 2015
    Applicant: International Business Machines Corporation
    Inventors: Alexandre P. Ferreira, Jente B. Kuang, Janani Mukundan, Karthick Rajamani
  • Patent number: 8909954
    Abstract: A mechanism is provided for dynamically changing power caps for a set of powered elements. Current being consumed by the set of powered elements P on a branch circuit is measured and available current on the branch circuit is determined. A new total power cap for a current time period t is identified based on a current total power cap and the measured current. A difference in total power caps (?TPC) is determined and, for each powered element p in the set of powered elements P at the current time period, a new power cap PC (p,t) is determined based on the previous power cap PC(p,t?1) and the difference of the total power caps to the set of powered elements P. A power cap of each powered element p is then dynamically set to the new power cap PC (p,t).
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: December 9, 2014
    Assignee: International Business Machines Corporation
    Inventors: Malcolm S. Allen-Ware, Thomas M. Brey, Wael R. El-Essawy, Alexandre P. Ferreira, Thomas W. Keller, Jr.
  • Publication number: 20140136786
    Abstract: A processor includes a processor core, a cache, and a tracker. The processor core is configured to execute persistent write instructions and receive notifications of completed persistent write instructions. The tracker is configured to track the completion state of a persistent write instruction.
    Type: Application
    Filed: November 13, 2012
    Publication date: May 15, 2014
    Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Gary D. Carpenter, Stefanie R. Chiras, Alexandre P. Ferreira, Jente B. Kuang, Karthick Rajamani, Freeman L. Rawson, III
  • Publication number: 20140100804
    Abstract: A mechanism is provided for statistical determination of power circuit connectivity based on signal detection in a circuit. Signal data from the circuit gathered and a determination is made as to whether a signal of interest is present in the gathered signal data from the circuit using a statistical analysis of the gathered signal data. The statistical analysis comprises using a mean current value and statistical deviation of the current value of the signal data over a predetermined period of time to compute a confidence range. The confidence range is compared to a first threshold and a second threshold. A determination is made that the signal is present in response to the confidence range being above the first threshold. A determination is made that the signal is not present in response to the confidence range being below the second threshold.
    Type: Application
    Filed: October 10, 2012
    Publication date: April 10, 2014
    Applicant: International Business Machines Corporation
    Inventors: Wael R. El-Essawy, Alexandre P. Ferreira, Thomas W. Keller, JR., Sani R. Nassif, Karthick Rajamani, Juan C. Rubio
  • Publication number: 20130054981
    Abstract: A mechanism is provided for dynamically changing power caps for a set of powered elements. Current being consumed by the set of powered elements P on a branch circuit is measured and available current on the branch circuit is determined. A new total power cap for a current time period t is identified based on a current total power cap and the measured current. A difference in total power caps (?TPC) is determined and, for each powered element p in the set of powered elements P at the current time period, a new power cap PC (p,t) is determined based on the previous power cap PC(p,t?1) and the difference of the total power caps to the set of powered elements P. A power cap of each powered element p is then dynamically set to the new power cap PC (p,t).
    Type: Application
    Filed: August 23, 2011
    Publication date: February 28, 2013
    Applicant: International Business Machines Corporation
    Inventors: Malcolm S. Allen-Ware, Thomas M. Brey, Wael R. El-Essawy, Alexandre P. Ferreira, Thomas W. Keller, JR.
  • Publication number: 20130054985
    Abstract: A mechanism is provided for dynamically changing power caps for a set of powered elements. Current being consumed by the set of powered elements P on a branch circuit is measured and available current on the branch circuit is determined. A new total power cap for a current time period t is identified based on a current total power cap and the measured current. A difference in total power caps (?TPC) is determined and, for each powered element p in the set of powered elements P at the current time period, a new power cap PC (p,t) is determined based on the previous power cap PC(p,t?1.) and the difference of the total power caps to the set of powered elements P. A power cap of each powered element p is then dynamically set to the new power cap PC (p,t).
    Type: Application
    Filed: August 21, 2012
    Publication date: February 28, 2013
    Applicant: International Business Machines Corporation
    Inventors: Malcolm S. Allen-Ware, Thomas M. Brey, Wael R. El-Essawy, Alexandre P. Ferreira, Thomas W. Keller, JR.