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ice: small efficiency fixes 

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>
alistair/sunxi64-5.4-dsi
Jesse Brandeburg 2019-08-08 07:39:37 -07:00 committed by Jeff Kirsher
parent 6503b65930
commit d27525ec1f
1 changed files with 3 additions and 1 deletions
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4
drivers/net/ethernet/intel/ice/ice_txrx.c
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@ -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 */