получить информацию о часах устройства (Get device clock information)
Имя (Name)
mlx5dv_get_clock_info - Get device clock information
Синопсис (Synopsis)
#include <infiniband/mlx5dv.h>
int mlx5dv_get_clock_info(struct ibv_context *ctx_in,
struct mlx5dv_clock_info *clock_info);
Описание (Description)
Get the updated core clock_info from the device driver. This
information will be used later to translate the completion
timestamp from HCA core clock to nanoseconds. The values of the
clock are updated from the driver's PTP clock, therefore, without
a running PTP client on the machine, the wall clock conversion
will not be accurate.
Pass the latest struct mlx5dv_clock_info to mlx5dv_ts_to_ns(3) in
order to translate the completion timestamp from HCA core clock
to nanoseconds.
If the clock_info becomes too old then time conversion will
return wrong conversion results. The user must ensure that
mlx5dv_get_clock_info(3) is called at least once every
max_clock_info_update_nsec as returned by the
mlx5dv_query_device(3) function.
Возвращаемое значение (Return value)
0 on success or the value of errno on failure (which indicates
the failure reason).
Смотри также (See also)
mlx5dv(7), mlx5dv_ts_to_ns(3)
