公开(公告)号：GB2522030A

公开(公告)日：2015-07-15

申请号：GB201400378

申请日：2014-01-10

Applicant: IBM

Inventor： BUENDGEN REINHARD ,  MAYER ULRICH ,  HUBER MATTHIAS ,  WERNER KLAUS

IPC: G06F11/30

Abstract: A method for monitoring of a shared hardware resource (100) in a computer system (1) running at least two partitions (P1, P2, ..., Pn) comprising the steps of: collecting measurement data from the hardware resource (100); computing an aggregation of the measurement data over a certain time interval; using a workload dependent heuristic to calculate a noise level value adapted to a workload; generating noise data based on the noise level value; confounding the computed aggregation of measurement data with the generated noise data; and outputting the confounded measurement data to an external interface (220) for monitoring. The shared hardware resource may be a cryptographic adapter or cryptographic engine which handles sensitive or private information. A noise information repository (310) accessible from a measurement component (200) and a noise data generator (300) stores noise data or noise level values as noise information computed by the noise data generator (300). The measurement component (200) may be shielded from external access except through the confounded measurement data available via the external interface (220). The invention seeks to prevent the leakage of usage data between partitions. In particular it prevents usage data from an individual partition being derivable from global performance measurement data.