ARCH_TIMER_EVT_STREAM_PERIOD_US   32 arch/arm64/lib/delay.c 			USECS_TO_CYCLES(ARCH_TIMER_EVT_STREAM_PERIOD_US);
ARCH_TIMER_EVT_STREAM_PERIOD_US   61 include/clocksource/arm_arch_timer.h 	(USEC_PER_SEC / ARCH_TIMER_EVT_STREAM_PERIOD_US)