PREFETCH          647 arch/x86/include/asm/perf_event_p4.h 	P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ALLOCATION, PREFETCH, 15),
PREFETCH          659 arch/x86/include/asm/perf_event_p4.h 	P4_GEN_ESCR_EMASK(P4_EVENT_IOQ_ACTIVE_ENTRIES, PREFETCH, 15),