International Business Machines Corporation

Ryan Patrick Grimm

Joel Howard Schopp

Nathan Fontenot

Michael Thomas Strosaker

Jeffrey David George

Christopher J Arges

George Conerly Wilson

Mark Wayne VanderWiele

Monty Christoph Poppe

Robert Cory Jennings, Jr

Michael T Strosker

Nathan Fortenot

According to one embodiment of the present disclosure, an approach is provided in which a processor selects a page of data that is compressed by a first compression algorithm and stored in a memory block. The processor identifies a utilization amount of the compressed page of data and determines whether the utilization amount meets a utilization threshold. When the utilization amount fails to meet the utilization threshold, the processor uses a second compression algorithm to recompresses the page of data.

Multi-level memory compression

A method for resetting of memory locks in a transactional memory system. The method includes a processor setting at least one new memory lock during execution of a transaction that acquires access to a region of memory. The new memory lock indicates that the transaction and its associated thread have exclusive temporary access to the memory region. The method further includes determining if a first in first out (FIFO) memory lock register is full of memory locks and, in response to the FIFO memory lock register being full, a memory lock is removed from a tail position of the FIFO memory lock register. The removed memory lock is reset to return to a transactional memory state and the new memory lock is added to a head position in the FIFO memory lock register.

Resetting memory locks in a transactional memory system

A system and computer program product for resetting of memory locks in a transactional memory system. The system includes a processor setting at least one new memory lock during execution of a transaction that acquires access to a region of memory. The new memory lock indicates that the transaction and its associated thread have exclusive temporary access to the memory region. The system further includes the processor determining if a first in first out (FIFO) memory lock register is full of memory locks and, in response to the FIFO memory lock register being full, a memory lock is removed from a tail position of the FIFO memory lock register. The removed memory lock is reset to return to a transactional memory state and the new memory lock is added to a head position in the FIFO memory lock register.

Embodiments of the invention relate to implementation of an intermediate trusted state of an electronic account based upon questionable account communication(s). A profile of malicious or unauthorized activity is created, and a profile of account activity is created. As account activity takes place, the activity is assessed against one or both of the profiles to statistically determine if the activity resembles that associated with malicious or unauthorized intent. The state of the account is placed in the intermediate trusted state if the activity statistically matches the unauthorized activity profile. An authentication activity enables the trusted state to be removed and for the account activity to resume.

Intermediate trust state

A method, system, and computer program product for selecting memory pages for compression based on a population count associated with their datasets are disclosed. For example, a dataset stored in a memory page of an uncompressed memory is analyzed. Based on the analyzing, a population count associated with the dataset is identified. The population count is compared to at least one threshold. Based on the comparing, the memory page is selected or rejected for compression.

Compressed memory page selection based on a population count of a dataset

A method which controls modification of passwords. An end user designates, in advance, a universe of social media contacts such as friends on social media web sites such as Facebook and LinkedIn. Contacts so identified are used as a set of potential identity verifiers. In order to enable a reset or modification of an account password, a subset of the universe is required to assert that they have verified the identity of the user requesting to reset a password. Such verification can be accomplished by varying means by those to whom an inquiry has been directed.

Controlled password modification method

Apparatus which control modification of passwords by implementing a procedure by which end user designates, in advance, a universe of social media contacts such as friends on social media web sites such as Facebook and Linkedln. Contacts so identified are used as a set of potential identity verifiers. In order to enable a reset or modification of an account password, a subset of the universe is required to assert that they have verified the identity of the user requesting to reset a password. Such verification can be accomplished by varying means by those to whom an inquiry has been directed. Te apparatus may be in the form of a computer system or a computer readable storage medium.

Controlled password modification method and apparatus

An apparatus and system for protecting memory of a virtual guest includes initializing a virtual guest on a host computing system. The host computing system includes a virtual machine manager that manages operation of the virtual guest. The virtual guest includes a distinct operating environment executing in a virtual operation platform provided by the virtual machine manager. The method includes receiving an allocation of run-time memory for the virtual guest, the allocation of run-time memory comprising a portion of run-time memory of the host computing system. The method includes setting, by the virtual guest, at least a portion of the allocation of run-time memory to be inaccessible by the virtual machine manager.

Protecting memory of a virtual guest

The method for protecting memory of a virtual guest includes initializing a virtual guest on a host computing system. The host computing system includes a virtual machine manager that manages operation of the virtual guest. The virtual guest includes a distinct operating environment executing in a virtual operation platform provided by the virtual machine manager. The method includes receiving an allocation of run-time memory for the virtual guest, the allocation of run-time memory comprising a portion of run-time memory of the host computing system. The method includes setting, by the virtual guest, at least a portion of the allocation of run-time memory to be inaccessible by the virtual machine manager.

A computer implemented method for managing an execution mode for a parallel processor is provided. A monitor identifies a first efficiency rate for a first contested resource of the parallel processor operating in a first operating mode. Responsive to identifying the first efficiency rate for the first contested resource, the monitor identifies whether the first efficiency rate for the contested resource of the parallel processor operating in the first operating mode exceeds a threshold. Responsive to identifying that the efficiency rate for the contested resource exceeds the threshold, an operation of the parallel processor is changed to a second operating mode.

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Austin, TX, United States of America

Ryan Patrick Grimm