package rs.tokio.console.async_ops

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An async operation. An async operation is an operation that is associated with a resource This could, for example, be a read or write on a TCP stream, or a receive operation on a channel.

Used in: AsyncOpUpdate

• optional common.Id id = 1

  The async op's ID. This uniquely identifies this op across all *currently live* ones.

• optional common.MetaId metadata = 2

  The numeric ID of the op's `Metadata`. This identifies the `Metadata` that describes the `tracing` span corresponding to this async op. The metadata for this ID will have been sent in a prior `RegisterMetadata` message.

• string source = 3

  The source of this async operation. Most commonly this should be the name of the method where the instantiation of this op has happened.

• optional common.Id parent_async_op_id = 4

  The ID of the parent async op. This field is only set if this async op was created while inside of another async op. For example, `tokio::sync`'s `Mutex::lock` internally calls `Semaphore::acquire`. This field can be empty; if it is empty, this async op is not a child of another async op.

• optional common.Id resource_id = 5

  The resources's ID.

An `AsyncOp` state update. This includes a list of any new async ops, and updates to the associated statistics for any async ops that have changed since the last update.

Used in: instrument.Update

• repeated AsyncOp new_async_ops = 1

  A list of new async operations that were created since the last `AsyncOpUpdate` was sent. Note that the fact that an async operation has been created does not mean that is has been polled or is being polled. This information is reflected in the `Stats` of the operation.

• map<uint64, Stats> stats_update = 2

  Any async op stats that have changed since the last update.

• uint64 dropped_events = 3

  A count of how many async op events (e.g. polls, creation, etc) were not recorded because the application's event buffer was at capacity. If everything is working normally, this should be 0. If it is greater than 0, that may indicate that some data is missing from this update, and it may be necessary to increase the number of events buffered by the application to ensure that data loss is avoided. If the application's instrumentation ensures reliable delivery of events, this will always be 0.

Statistics associated with a given async operation.

Used in: AsyncOpUpdate

• optional google.protobuf.Timestamp created_at = 1

  Timestamp of when the async op has been created.

• optional google.protobuf.Timestamp dropped_at = 2

  Timestamp of when the async op was dropped.

• optional common.Id task_id = 4

  The Id of the task that is awaiting on this op.

• optional common.PollStats poll_stats = 5

  Contains the operation poll stats.

• repeated common.Attribute attributes = 6

  State attributes of the async op.