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net/qede: free packets in bulk

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rte_pktmbuf_free_bulk calls rte_mempool_put_bulk with the number of
pending packets to return to the mempool. In contrast, rte_pktmbuf_free
calls rte_mempool_put that calls rte_mempool_put_bulk with one object.
An important performance related downside of adding one packet at a time
to the mempool is that on each call, the per-core cache pointer needs to
be read from tls while a single rte_mempool_put_bulk only reads from the
tls once.

Signed-off-by: Balazs Nemeth <bnemeth@redhat.com>
Reviewed-by: Igor Russkikh <irusskikh@marvell.com>
This commit is contained in:
Balazs Nemeth 2021-03-26 12:01:27 +01:00 committed by Jerin Jacob
parent 303e78f2bc
commit 4996b959cd
1 changed files with 11 additions and 1 deletions
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12
drivers/net/qede/qede_rxtx.c
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@ -893,6 +893,7 @@ qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
struct rte_mbuf *mbuf;
uint16_t nb_segs;
uint16_t idx;
uint16_t first_idx;
rte_compiler_barrier();
sw_tx_cons = ecore_chain_get_cons_idx(&txq->tx_pbl);
@ -907,6 +908,7 @@ qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
remaining = hw_bd_cons - sw_tx_cons;
txq->nb_tx_avail += remaining;
first_idx = idx;
while (remaining) {
mbuf = txq->sw_tx_ring[idx];
@ -921,11 +923,19 @@ qede_process_tx_compl(__rte_unused struct ecore_dev *edev,
nb_segs--;
}
rte_pktmbuf_free(mbuf);
idx = (idx + 1) & mask;
PMD_TX_LOG(DEBUG, txq, "Freed tx packet\n");
}
txq->sw_tx_cons = idx;
if (first_idx > idx) {
rte_pktmbuf_free_bulk(&txq->sw_tx_ring[first_idx],
mask - first_idx + 1);
rte_pktmbuf_free_bulk(&txq->sw_tx_ring[0], idx);
} else {
rte_pktmbuf_free_bulk(&txq->sw_tx_ring[first_idx],
idx - first_idx);
}
}
static int qede_drain_txq(struct qede_dev *qdev,