Zero_copy.ZeroCopyMetricsPerformance monitoring for zero-copy channels
val create_metrics : unit -> channel_metricsval record_send : channel_metrics -> int -> int64 -> unitval record_receive : channel_metrics -> int -> int64 -> unitval record_checksum_failure : channel_metrics -> unitval record_buffer_overflow : channel_metrics -> unitval get_stats : channel_metrics -> channel_stats