Sampling with sample pacing

摘要

A plurality of samples is generated in a computer to profile and record a plurality of events associated with the computer. For each of the plurality of samples, a plurality of partial samples is accumulated prior to occurrence of each of the plurality of events. In addition, a processor may process a current sample of the plurality of samples in response to (i) a completion of a previous sample of the plurality of samples and (ii) a predetermined threshold quantity of partial samples being accumulated. Embodiments of the invention include methods, systems and computer program products.

主权项

1. A computer program product for sampling, the computer program product comprising:
a computer readable storage medium having computer readable program code embodied therewith, the computer readable storage medium is not a computer readable signal medium, the computer readable program code comprising: computer readable program code to set an affinity of a target thread such that the target thread runs on a current processor without being able to migrate to a different processor; in response to setting the affinity, computer readable program code to generate a plurality of samples in the computer system to profile and record a plurality of events associated with the target thread; and computer readable program code to accumulate, for each of the plurality of samples, a plurality of partial samples prior to occurrence of each of the plurality of events; and computer readable program code to process a current sample of the plurality of samples in response to (i) completing processing of a previous sample of the plurality of samples and (ii) an accumulated quantity of the pluralities of partial samples exceeding a predetermined threshold quantity.