International Business Machines Corporation

Stephen Rees

Bret Ronald Olszewski

Basu Vaidyanathan

Bernard A King-Smith

Martin Oberhofer

Jens Peter Seifert

Paul Miller Bird

David C Kalmuk

Scott Douglas Walkty

Kostas Rakopoulos

Mark Francis Wilding

Alexander Abrashkevich

Robin Grosman

Dmitri Abrashkevich

Ralph James Bateman

Yinghua (Amy) Tang

A process for processor management includes activating a delay thread running on a processor. A determination is made whether a wait event for a first thread running on the processor is in a queue. Responsive to determining that the wait event for the first thread is in the queue, a determination is made whether a wait time associated with the wait event has expired. Responsive to determining that the wait time has not expired, a determination is made if wait time exceeds a threshold. Responsive to determining that the wait time exceeds the threshold, a timer is set and a low power mode is initiated for the processor.

Processor management via thread status

A logging process in a data storage system having a set of storage tiers, each storage tier of the set of storage tiers having different performance characteristics, wherein the set of storage tiers is divided into a plurality of subsets of storage tiers using the performance characteristics, may include initiating the logging process for creating a separate log file for each of the plurality of subsets of storage tiers for maintaining a history of data changes in the subset of storage tiers, thereby creating a plurality of log files. In response to a change in data stored in at least one storage tier of a subset of storage tiers of the plurality of subsets of storage tiers, one or more log records including information about the change may be generated and written into respective log files.

Logging process in a data storage system

Various systems, processes, and products may be used to manage a processor. In particular implementations, managing a processor may include the ability to determine whether a thread is pausing for a short period of time and place a wait event for the thread in a queue based on a short thread pause occurring. Managing a processor may also include the ability to activate a delay thread that determines whether a wait time associated with the pause has expired and remove the wait event from the queue based on the wait time having expired.

According to an embodiment of the present invention, a system assigns at least one workload a hard share quantity and at least one other workload a soft share quantity or a hard share quantity. The system allocates a resource to the workloads based on the hard share quantity and the soft share quantity of active workloads in a predefined interval. A hard share quantity indicates a maximum resource allocation and a soft share quantity enables allocation of additional available processor time. Embodiments of the present invention further include a method and computer program product for allocating a resource to workloads in substantially the same manner as described above.

Adaptive resource usage limits for workload management

A method for describing activities in software products is provided. The method provides for identifying a plurality of activities in a software product that are of interest, defining an event structure to describe each identified activity as an event, associating each identified activity with one or more problem determination technologies, executing the software product, and responsive to detecting one of the plurality of identified activities during execution of the software product, creating one or more event records for the one detected activity based on the defined event structure, initiating the one or more problem determination technologies associated with the one detected activity, and passing the one or more event records to each of the one or more problem determination technologies.

Description of activities in software products

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Bowmanville, Canada

Stephen Rees