Abstract:
A method, apparatus and computer program product are provided for implementing breakpoint based performance measurement. A set of hardware counters is defined for counting user specified hardware events. The hardware counters are programmable for counting predefined processor events and the predefined processor events include processor cycles. A start breakpoint instruction and a stop breakpoint instruction are inserted in hardware instructions. The hardware instructions are executed and processing of the hardware instructions is suspended responsive to executing the start breakpoint instruction. Responsive to executing the start breakpoint instruction, interrupt handler instructions are entered and breakpoint instructions are called. The breakpoint instructions generating a return from interrupt instruction to start the defined set of hardware counters and to return processing from the interrupt handler instructions to the hardware instructions. Then executing the hardware instructions is suspended responsive to executing the end breakpoint instruction to stop the defined set of hardware counters.
Abstract:
An apparatus, program product and method utilize a virtual flight recorder to harvest a subset of events being collected by an active system tracing facility during operation of a computer system. The virtual flight recorder is “virtual” from the sense that it is not specifically instrumented into a component with which the virtual flight recorder is associated, which eliminates the burden on developers to specifically instrument components of interest, and minimizes the impact on system performance as a result of performance metric collection.
Abstract:
A method, apparatus, system, and signal-bearing medium that in an embodiment convert e-mail into physical mail. In various embodiments, if a recipient identifier in the e-mail is an e-mail address, the recipient identifier is retained. But, if the recipient identifier in the e-mail is not an e-mail address, the recipient identifier, or a street address associated with the recipient identifier, is printed on an envelope, and the e-mail is also printed. Postage may also optionally be printed on the envelope. In this way, persons who do not have an e-mail address may still receive the contents of e-mail via physical delivery.