Which HP tool can be used to analyze all performance counters of the existing array?

HP Performance Monitor is not a recognized HP storage array performance product - there is no standard HP tool by that exact name designed for array-level performance counter analysis.

HP EVAPerf is a performance monitoring utility specific to HP EVA (Enterprise Virtual Array) systems and cannot be used with 3PAR or other HP array families.

Windows Perfmon is a host OS utility that monitors Windows system metrics and has no capability to directly access or analyze internal storage array performance counters.

HP 3PAR System Reporter is specifically designed to collect, analyze, and report on all performance counters within HP 3PAR storage arrays, providing historical trending and real-time metrics for ports, volumes, nodes, and disks. It integrates natively with the 3PAR OS to surface array-internal data that no host-side tool can access. This makes it the authoritative and purpose-built tool for complete performance counter analysis of an existing 3PAR array.