Jetson Orin TSC Timer

[ShaneCCC]

Have reference to below topic.

Clocks: Linux System Time vs TSC vs RTC

system time( date command) is rtc time. but date application may not go to HW to get the time from RTC. It has its own userspace way of maintaining the time. TSC is a free running timer which stat during boot , 7 seconds before kernel boot. that offset will always remain. To use TSC you should use clock_get_time(monotinic) api. The normal way Linux maintains time counter like CLOCK_REALTIME or CLOCK_MONOTONIC does depend on the TSC rate, the origin is however arbitrary, so there is always at …