A coherency resolution technique enables efficient resolution of data
coherency for packet data associated with a service queue of an
intermediate network node. The packet data is enqueued on a write buffer
prior to being stored on an external packet memory of a packet memory
system. The packet data may be interspersed among other packets of data
from different service queues, wherein the packets are of differing sizes.
In response to a read request for the packet data, a coherency operation
is performed by coherency resolution logic on the data in the write buffer
to determine if any of its enqueued data can be used to service the
request.
