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e1000: switch to napi_build_skb() 

napi_build_skb() reuses per-cpu NAPI skbuff_head cache in order
to save some cycles on freeing/allocating skbuff_heads on every
new Rx or completed Tx element.
e1000 driver runs Tx completion polling cycle right before the Rx
one. Now that e1000 uses napi_consume_skb() to put skbuff_heads of
completed entries into the cache, it will never empty and always
warm at that moment. Switch to the napi_build_skb() to relax mm
pressure on heavy Rx and increase throughput.

Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Tony Brelinski <tony.brelinski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
This commit is contained in:
Alexander Lobakin 2021-11-23 18:18:33 +01:00 committed by Tony Nguyen
parent dcb95f06ea
commit 89a354c03b
1 changed files with 1 additions and 1 deletions
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2
drivers/net/ethernet/intel/e1000/e1000_main.c
View File

@ -4384,7 +4384,7 @@ static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
if (!skb) {
unsigned int frag_len = e1000_frag_len(adapter);
skb = build_skb(data - E1000_HEADROOM, frag_len);
skb = napi_build_skb(data - E1000_HEADROOM, frag_len);
if (!skb) {
adapter->alloc_rx_buff_failed++;
break;