PCM_NO_PERF=1 : don't use Linux perf events API to program core PMUs (default is to use it)
PCM_USE_UNCORE_PERF=1 : use Linux perf events API to program uncore PMUs (default is not to use it)
PCM_NO_RDT=1 : don't use RDT metrics for a better interoperation with pqos utility (https://github.com/intel/intel-cmt-cat)
PCM_USE_RESCTRL=1 : use Linux resctrl driver for RDT metrics
PCM_PRINT_TOPOLOGY=1 : print detailed CPU topology
PCM_KEEP_NMI_WATCHDOG=1 : don't disable NMI watchdog (reducing the core metrics set)
PCM_NO_MAIN_EXCEPTION_HANDLER=1 : don't catch exceptions in the main function of pcm tools (a debugging option)
PCM_ENFORCE_MBM=1 : force-enable Memory Bandwidth Monitoring (MBM) metrics (LocalMemoryBW = LMB) and (RemoteMemoryBW = RMB) on processors with RDT/MBM errata
PCM_DEBUG_LEVEL=x : x is an integer defining debug output level. level = 0 (default): minimal or no debug info, > 0 increases verbosity