In "Intel 64 and IA-32 Architectures Optimization
Reference Manual" (April 2012) B.3.2.3 Memory Bound Characterization, it
says that: "In Intel microarchitecture code name Ivy Bridge, a new
performance monitoring event 'CYCLE_ACTIVITY.STALLS_LDM_PENDING' is provided to
estimate the exposure of memory accesses..." However I could not find such an event in Ivy
Bridge performance events list (Table 19-2) in "Intel 64 and IA-32
Architectures Software Developer's Manual Volumes 3". In fact none of the CYCLE_ACTIVITY.* events
mentioned in Optimization Reference Manual exist in the Ivy Bridge events list. Why are these events not documented?