ice: small efficiency fixes (d27525ec) · Commits · 戴 / test

Add a small bit of efficiency to the code by adding a prefetch of the port_info structure in order to help avoid a cache miss a little later on in execution. Also add an unlikely statement to a branch which generally will never happen in normal operation. Signed-off-by:

Jesse Brandeburg <jesse.brandeburg@intel.com> Tested-by:

Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:

Jeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/ice/ice_txrx.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1226,6 +1226,8 @@ ice_update_itr(struct ice_q_vector q_vector, struct ice_ring_container rc)
		if (time_after(next_update, rc->next_update))
		goto clear_counts;

		prefetch(q_vector->vsi->port_info);

		packets = rc->total_pkts;
		bytes = rc->total_bytes;

		@@ -1486,7 +1488,7 @@ int ice_napi_poll(struct napi_struct *napi, int budget)
		clean_complete = false;

		/* Handle case where we are called by netpoll with a budget of 0 */
		if (budget <= 0)
		if (unlikely(budget <= 0))
		return budget;

		/* normally we have 1 Rx ring per q_vector */

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