International Business Machines Corporation

Donald Lawrence Mulvey

Robert Francis Berry

Frank Eliot Levine

Robert John Urquhart

Enio Manuel Pineda

Chester Charles John, Jr

Christopher Michael Richardson

Riaz Yousuf Hussain

William Preston Alexander, Iii

Robert J Urguhart

John Day Howard

Ronald O'Neal Edmark

A system and method for activating bookmark files on a pervasive computing device is provided. When the pervasive computing device receives geographic coordinates from a global positioning system (GPS), it selects appropriate bookmarks for the user's location. The pervasive computing device compares geographic coordinate data received from the GPS with geographic matching data stored on the pervasive computing device. In addition, actions are taken to perform commands when the user is within the proximity of a location. Scheduling means are provided so that actions are performed during appropriate times. The pervasive computing device further connects to a computer network, such as the Internet, to access data files and to perform commands on external computing devices. If the commands are executed successfully, a success action is performed on the pervasive computing device. On the other hand, if errors were encountered a failure action is performed notifying the user of the error. Further disclosed are a system and a computer program product each providing active geographic-based bookmarks.

System and method for proximity bookmarks using GPS and pervasive computing

A user may specify a vector of metrics to be used while profiling a program. The vector of metrics may optionally be thread-relative. In response to a notification of an occurrence of the current event, a thread-relative elapsed metric is computed by: determining a current thread; retrieving a stored reference metric for the preceding event of the current thread; obtaining a current reference metric; and computing the thread-relative elapsed metric as a difference between the current reference metric and the stored reference metric. In order to prevent the generation of redundant metric information, the information associated with the vector of metrics maybe placed into the trace records in several different space-saving formats.

Processing events during profiling of an instrumented program

An apparatus and method for cataloging symbolic data for use in performance analysis of computer programs is provided. The apparatus and method stores symbolic data for loaded modules during or shortly after a performance trace and utilizes the stored symbolic data when performing a performance analysis at a later time. A merged symbol file is generated for a computer program, or application, under trace. The merged symbol file contains information useful in performing symbolic resolution of address information in trace files for each instance of a module. During post processing of the trace information generated by a performance trace of a computer program, symbolic information stored in the merged symbol file is compared to the trace information stored in the trace file. The correct symbolic information in the merged symbol file for loaded modules is identified based on a number of validating criteria. The correct symbolic information for the loaded modules may then be stored as an indexed database that is used to resolve address information into corresponding symbolic information when providing the trace information to a display for use by a user.

Apparatus and method for creating a trace file for a trace of a computer program based on loaded module information

A method and implementing computer system is provided in which the actual frequency of system timing signals is determinable. In one example, an output from a programmable interrupt timer is selectively sampled and a determination is made of the actual frequency of the interrupt signal. A user may indicate the number of samples upon which the frequency calculation will be based and the determined actual frequency in real time is saved for reference as needed by system requirements and other applications. In one embodiment, the number of samples and the calculated actual interrupt timer frequency, as well as other related information such as time and date of the latest calculation, is presented on a user display device.

Determination of frequency of timer ticks

A method for monitoring performance of a program. A periodically occurring event is detected and a stack associated with the program is identified in response to a detection of the periodically occurring event, which may be a timer interrupt. The stack is examined to identify each routine (and specific invocation point, or offset) that is currently executing in association with the program. Each routine (and offset) is represented as a node in a tree structure.

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Round Rock, TX, United States of America

Donald Lawrence Mulvey