Dor Laor
2007-Dec-21 07:26 UTC
[kvm-devel] [Virtio-for-kvm] [PATCH 11/13] [Mostly resend] virtio additions
From 867f898388bda2dccf6d0aba2a9c96abae1697ed Mon Sep 17 00:00:00 2001
From: Dor Laor <dor.laor@qumranet.com>
Date: Sun, 16 Dec 2007 15:19:43 +0200
Subject: [PATCH] Parametrize the napi_weight for virtio receive queue.
It is done in order to improve performance.
Signed-off-by: Dor Laor <dor.laor@qumranet.com>
---
drivers/net/virtio_net.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 0403d65..d35dbe7 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -25,6 +25,9 @@
#include <linux/scatterlist.h>
#include <linux/hrtimer.h>
+static int napi_weight = 128;
+module_param(napi_weight, int, 0);
+
/* FIXME: MTU in config. */
#define MAX_PACKET_LEN (ETH_HLEN+ETH_DATA_LEN)
@@ -508,7 +511,7 @@ static int virtnet_probe(struct virtio_device *vdev)
/* Set up our device-specific information */
vi = netdev_priv(dev);
- netif_napi_add(dev, &vi->napi, virtnet_poll, 16);
+ netif_napi_add(dev, &vi->napi, virtnet_poll, napi_weight);
vi->dev = dev;
vi->vdev = vdev;
hrtimer_init(&vi->tx_timer, CLOCK_REALTIME, HRTIMER_MODE_REL);
--
1.5.3.3