Struct MsgDescCold 

#[repr(C, align(64))]
pub struct MsgDescCold {
    pub msg_id: u64,
    pub trace_id: u64,
    pub span_id: u64,
    pub parent_span_id: u64,
    pub timestamp_ns: u64,
    pub debug_level: u32,
    pub _reserved: u32,
}

Cold-path message descriptor (observability data).

Stored in a parallel array or separate telemetry ring. Can be disabled for performance.

Fields

msg_id: u64

Correlates with hot descriptor.

trace_id: u64

Distributed tracing ID.

span_id: u64

Span within trace.

parent_span_id: u64

Parent span ID.

timestamp_ns: u64

When enqueued (nanos since epoch).

debug_level: u32

0=off, 1=metadata, 2=full payload.

_reserved: u32

Trait Implementations

impl Clone for MsgDescCold

fn clone(&self) -> MsgDescCold

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MsgDescCold

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MsgDescCold

fn default() -> MsgDescCold

Returns the “default value” for a type.

impl Copy for MsgDescCold