From: David Vrabel Date: Tue, 4 Oct 2016 09:29:16 +0000 (+0100) Subject: xen-netback: process guest rx packets in batches X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=98f6d57ced73b723551568262019f1d6c8771f20;p=linux-beck.git xen-netback: process guest rx packets in batches Instead of only placing one skb on the guest rx ring at a time, process a batch of up-to 64. This improves performance by ~10% in some tests. Signed-off-by: David Vrabel [re-based] Signed-off-by: Paul Durrant Signed-off-by: David S. Miller --- diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c index 95487091763c..ae822b8fa76d 100644 --- a/drivers/net/xen-netback/rx.c +++ b/drivers/net/xen-netback/rx.c @@ -399,7 +399,7 @@ static void xenvif_rx_extra_slot(struct xenvif_queue *queue, BUG(); } -void xenvif_rx_action(struct xenvif_queue *queue) +void xenvif_rx_skb(struct xenvif_queue *queue) { struct xenvif_pkt_state pkt; @@ -425,6 +425,19 @@ void xenvif_rx_action(struct xenvif_queue *queue) xenvif_rx_complete(queue, &pkt); } +#define RX_BATCH_SIZE 64 + +void xenvif_rx_action(struct xenvif_queue *queue) +{ + unsigned int work_done = 0; + + while (xenvif_rx_ring_slots_available(queue) && + work_done < RX_BATCH_SIZE) { + xenvif_rx_skb(queue); + work_done++; + } +} + static bool xenvif_rx_queue_stalled(struct xenvif_queue *queue) { RING_IDX prod, cons;