Georgia Tech Research Corporation

Fujitsu Corporation

At&t Intellectual Property I, L.p.

Calton Pu

Yasuhiko Kanemasa

Qingyang Wang

Kaustubh Joshi

Gueyoung Jung

Matti A Hiltunen

Richard Dale Schlichting

Motoyuki Kawaba

Jinpeng Wei

An information processing apparatus includes a processor that is capable of switching a performance level to one of a plurality of performance levels with different power consumption, and a storage unit that stores a program for controlling the performance level of the processor. The processor executing the program detects the periodicity of load variation of the information processing apparatus, and changes, according to the periodicity of the load variation, a determination interval for determining whether to switch the performance level of the processor.

Information processing apparatus and load control method

In an information processing apparatus, a calculation unit retrieves data that indicates processing periods of processes executed in each time window constituting an analysis period. The calculation unit then calculates a total processing time for each time window by adding up processing times spent for execution of processes. The calculation unit also calculates a total progress quantity for each time window by adding up progress quantities of the processes. A determination unit determines, based on the total processing time and total progress quantity of each time window, a threshold of the total processing times at which the ratio of an increase of the total progress quantity to an increase of the total processing time is equal to or smaller than a predetermined value. A detection unit detects time windows whose total processing times are equal to or longer than the threshold.

Method, computer program, and information processing apparatus for analyzing performance of computer system

An information processing apparatus submits jobs for execution on a server. Jobs are classified into a plurality of groups, and these groups are ranked in ascending order of workload that the groups of jobs impose on the server. A processor in the information processing apparatus counts ongoing jobs that are currently executed on the server and belong to a specified number of top-ranked groups. The processor designates pending jobs that belong to other groups than the specified number of top-ranked groups and suspends submission of processing requests of the designated pending jobs to the server, when the number of ongoing jobs is greater than or equal to a threshold and when there are one or more pending jobs that belong to the specified number of top-ranked groups.

Information processing apparatus, computer program, and method for controlling execution of jobs

In an information processing apparatus, a comparing unit determines whether the response time of each transaction falls within an acceptable time range that is specified previously. For each time window, a first calculation unit calculates a load of processes executed in parallel by the servers in a specified tier, based on transaction data of individual transactions. Further, a second calculation unit calculates a total progress quantity in each time window, based on the transaction data of transactions whose respective response times are determined to fall within the acceptable time range. A determination unit determines a specific load value as a threshold at which the total progress quantity begins to decrease in spite of an increase of the load.

Computer program, method, and information processing apparatus for analyzing performance of computer system

A method and apparatus for providing a resource allocation policy in a network are disclosed. For example, the method constructs a queuing model for each application. The method defines a utility function for each application and for each transaction type of each application, and defines an overall utility in a system. The method performs an optimization to identify an optimal configuration that maximizes the overall utility for a given workload, and determines one or more adaptation policies for configuring the system in accordance with the optimal configuration.

Method and apparatus for providing resource allocation policy

The present disclosure relates to dynamically allocating multitier applications based upon performance and reliability of resources. A controller analyzes resources and applications hosted by the resources, and collects operational data relating to the applications and resources. The controller is configured to determine an allocation scheme for allocating or reallocating the applications upon failure of a resource and/or upon rollout or distribution of a new application. The controller generates configuration data that describes steps for implementing the allocation scheme. The resources are monitored, in some embodiments, by monitoring devices. The monitoring devices collect and report the operational information and generate alarms if resources fail.

Dynamically allocating multitier applications based upon application requirements and performance reliability of resources

Dynamically allocating multitier applications based upon application requirements and performance and reliability of resources

A method for identifying vulnerable system call pairs is disclosed. The method is based on a model for identifying Time-Of-Check-To-Time-Of-Use (TOCTTOU) problem (called STEM), which enumerates the potential file system call pairs (called exploitable TOCTTOU pairs) that form the check/use steps. The system function calls are classified into a plurality of predefined classes and pairs of the function calls are formed according to predefined criteria, where the function calls within a pair are associated with the same file invariant.

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Atlanta, GA, United States of America

Calton Pu