Function efd_apply_update

dpdk/lib/efd/rte_efd.c:795–830

* Applies a previously computed table entry to the specified table for all * socket-local copies of the online table. * Intended to apply an update for only a single change * to a key/value pair at a time * * @param table * EFD table to reference * @param socket_id * Socket ID to use to lookup existing values (ideally caller's socket id) * @param chunk_id * Chunk index to update *

 *   Previously computed updated chunk/group entry
 */
static inline void
efd_apply_update(struct rte_efd_table * const table, const unsigned int socket_id,
		const uint32_t chunk_id, const uint32_t group_id,
		const uint32_t bin_id, const uint8_t new_bin_choice,
		const struct efd_online_group_entry * const new_group_entry)
{
	int i;
	struct efd_online_chunk *chunk = &table->chunks[socket_id][chunk_id];
	uint8_t bin_index = bin_id / EFD_CHUNK_NUM_BIN_TO_GROUP_SETS;

	/*
	 * Grab the current byte that contains the choices
	 * for four neighboring bins
	 */
	uint8_t choice_chunk =
			chunk->bin_choice_list[bin_index];


	/* Compute the offset into the chunk that needs to be updated */
	int offset = (bin_id & 0x3) * 2;

	/* Zero the two bits of interest and set them to new_bin_choice */
	choice_chunk = (choice_chunk & (~(0x03 << offset)))
			| ((new_bin_choice & 0x03) << offset);

	/* Update the online table with the new data across all sockets */
	for (i = 0; i < RTE_MAX_NUMA_NODES; i++) {
		if (table->chunks[i] != NULL) {
			memcpy(&(table->chunks[i][chunk_id].groups[group_id]),
					new_group_entry,
					sizeof(struct efd_online_group_entry));
			table->chunks[i][chunk_id].bin_choice_list[bin_index] =
					choice_chunk;
		}
	}
}

/*
 * Move the bin from prev group to the new group