Shark, Apple's profiler which let you configure custom performance counters, is no longer supported in OSX Mountain Lion since it can't run a 32-bit kernel. Instruments.app, Apple's replacement for Shark, doesn't seem to support reading performance counters such as L1 cache hits/misses**. Is there anyway to actually setup and read performance counters on OS X? Even if there is no application, is there some user-land API to do this?
**Instruments.app does seem to have an interface for performance counters, but on my Retina MacBook Pro, the PM Events window lists no events, and indicates "Device: Unknown." Are there any other alternatives to Instruments?