With supporting timer_get_boot_us, we can profile boot up time with below configs and function bootstage_mark_name(). CONFIG_BOOTSTAGE=y CONFIG_BOOTSTAGE_REPORT=y CONFIG_CMD_BOOTSTAGE=y Signed-off-by: Jun Nie <jun.nie@linaro.org> Acked-by: Shawn Guo <shawn.guo@linaro.org> Reviewed-by: Fabio Estevam <festevam@denx.de>