LibPowerMon: A vendor-neutral system monitoring library
As power becomes an important resource to provision for modern HPC systems it becomes crucial to obtain deeper insights into application's power and thermal characteristics and to correlate application context with important system-level measurements. Existing profiling tools to monitor power and thermal measurements either operate at a granularity that is not fine enough to correlate with application-level events that describe application context or are not equipped to sample application-level events transparently. We introduce LibPowerMon, a lightweight, vendor-neutral user-level profiling framework to simultaneously sample user-specified application events and system-level metrics at up to 1 kHz sampling intervals. At the application level, LibPowerMon provides a source-level phase markup interface to capture application context. At runtime level, LibPowerMon records MPI and OpenMP events and can be extended to include other runtimes. At the system level, LibPowerMon samples power, thermal and relevant metrics, and provides an extensible interface to system's control capabilities. In this release, LibPowerMon supports monitoring and control functionalities on the Intel, IBM Power9 and Nvidia Volta architectures.