On 05/27/2015 02:02 AM, Stephen Hemminger wrote:
> On Mon, 25 May 2015 01:24:04 -0400
> Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
>> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
>> ---
>> drivers/vhost/net.c | 8 ++++++++
>> 1 file changed, 8 insertions(+)
>>
>> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
>> index 7d137a4..5ee28b7 100644
>> --- a/drivers/vhost/net.c
>> +++ b/drivers/vhost/net.c
>> @@ -320,6 +320,9 @@ static void handle_tx(struct vhost_net *net)
>> hdr_size = nvq->vhost_hlen;
>> zcopy = nvq->ubufs;
>>
>> + /* Finish pending interrupts first */
>> + vhost_check_coalesce_and_signal(vq->dev, vq, false);
>> +
>> for (;;) {
>> /* Release DMAs done buffers first */
>> if (zcopy)
>> @@ -415,6 +418,7 @@ static void handle_tx(struct vhost_net *net)
>> }
>> }
>> out:
>> + vhost_check_coalesce_and_signal(vq->dev, vq, true);
>> mutex_unlock(&vq->mutex);
>> }
>>
>> @@ -554,6 +558,9 @@ static void handle_rx(struct vhost_net *net)
>> vq->log : NULL;
>> mergeable = vhost_has_feature(vq, VIRTIO_NET_F_MRG_RXBUF);
>>
>> + /* Finish pending interrupts first */
>> + vhost_check_coalesce_and_signal(vq->dev, vq, false);
>> +
>> while ((sock_len = peek_head_len(sock->sk))) {
>> sock_len += sock_hlen;
>> vhost_len = sock_len + vhost_hlen;
>> @@ -638,6 +645,7 @@ static void handle_rx(struct vhost_net *net)
>> }
>> }
>> out:
>> + vhost_check_coalesce_and_signal(vq->dev, vq, true);
>> mutex_unlock(&vq->mutex);
>> }
>>
> Could you implement ethtool control of these coalescing parameters?
I believe you mean guest ethtool control. If yes, it has been
implemented in [RFC V7 PATCH 4/7] virtio-net: add basic interrupt
coalescing support.
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