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authorDavid Vrabel <david.vrabel@citrix.com>2016-10-04 12:29:16 +0300
committerDavid S. Miller <davem@davemloft.net>2016-10-07 03:37:36 +0300
commit98f6d57ced73b723551568262019f1d6c8771f20 (patch)
treecc8cc59b8b34aed750dd8c020fbd31dca62165af /drivers/net/xen-netback
parent7c0b1a23e6f983fe392c8ffa71d05189ae52ebb5 (diff)
downloadlinux-98f6d57ced73b723551568262019f1d6c8771f20.tar.xz
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 <david.vrabel@citrix.com> [re-based] Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback')
-rw-r--r--drivers/net/xen-netback/rx.c15
1 files changed, 14 insertions, 1 deletions
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;