* [PATCH V2 0/2] vhost_net polling optimization
@ 2016-05-30 6:47 Jason Wang
2016-05-30 6:47 ` [PATCH V2 1/2] vhost_net: stop polling socket during rx processing Jason Wang
2016-05-30 6:47 ` [PATCH V2 2/2] vhost_net: conditionally enable tx polling Jason Wang
0 siblings, 2 replies; 7+ messages in thread
From: Jason Wang @ 2016-05-30 6:47 UTC (permalink / raw)
To: mst, kvm, virtualization, netdev, linux-kernel; +Cc: Jason Wang
Hi:
This series tries to optimize vhost_net polling at two points:
- Stop rx polling for reduicng the unnecessary wakeups during
handle_rx().
- Conditonally enable tx polling for reducing the unnecessary
traversing and spinlock touching.
Test shows about 17% improvement on rx pps.
Please review
Changes from V1:
- use vhost_net_disable_vq()/vhost_net_enable_vq() instead of open
coding.
- Add a new patch for conditionally enable tx polling.
Jason Wang (2):
vhost_net: stop polling socket during rx processing
vhost_net: conditionally enable tx polling
drivers/vhost/net.c | 59 +++++++++++++++++++++++++++++------------------------
1 file changed, 32 insertions(+), 27 deletions(-)
--
1.8.3.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH V2 1/2] vhost_net: stop polling socket during rx processing
2016-05-30 6:47 [PATCH V2 0/2] vhost_net polling optimization Jason Wang
@ 2016-05-30 6:47 ` Jason Wang
2016-05-30 15:47 ` Michael S. Tsirkin
2016-05-30 6:47 ` [PATCH V2 2/2] vhost_net: conditionally enable tx polling Jason Wang
1 sibling, 1 reply; 7+ messages in thread
From: Jason Wang @ 2016-05-30 6:47 UTC (permalink / raw)
To: mst, kvm, virtualization, netdev, linux-kernel; +Cc: Jason Wang
We don't stop rx polling socket during rx processing, this will lead
unnecessary wakeups from under layer net devices (E.g
sock_def_readable() form tun). Rx will be slowed down in this
way. This patch avoids this by stop polling socket during rx
processing. A small drawback is that this introduces some overheads in
light load case because of the extra start/stop polling, but single
netperf TCP_RR does not notice any change. In a super heavy load case,
e.g using pktgen to inject packet to guest, we get about ~8.8%
improvement on pps:
before: ~1240000 pkt/s
after: ~1350000 pkt/s
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/net.c | 56 +++++++++++++++++++++++++++--------------------------
1 file changed, 29 insertions(+), 27 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 10ff494..e91603b 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -301,6 +301,32 @@ static bool vhost_can_busy_poll(struct vhost_dev *dev,
!vhost_has_work(dev);
}
+static void vhost_net_disable_vq(struct vhost_net *n,
+ struct vhost_virtqueue *vq)
+{
+ struct vhost_net_virtqueue *nvq =
+ container_of(vq, struct vhost_net_virtqueue, vq);
+ struct vhost_poll *poll = n->poll + (nvq - n->vqs);
+ if (!vq->private_data)
+ return;
+ vhost_poll_stop(poll);
+}
+
+static int vhost_net_enable_vq(struct vhost_net *n,
+ struct vhost_virtqueue *vq)
+{
+ struct vhost_net_virtqueue *nvq =
+ container_of(vq, struct vhost_net_virtqueue, vq);
+ struct vhost_poll *poll = n->poll + (nvq - n->vqs);
+ struct socket *sock;
+
+ sock = vq->private_data;
+ if (!sock)
+ return 0;
+
+ return vhost_poll_start(poll, sock->file);
+}
+
static int vhost_net_tx_get_vq_desc(struct vhost_net *net,
struct vhost_virtqueue *vq,
struct iovec iov[], unsigned int iov_size,
@@ -627,6 +653,7 @@ static void handle_rx(struct vhost_net *net)
if (!sock)
goto out;
vhost_disable_notify(&net->dev, vq);
+ vhost_net_disable_vq(net, vq);
vhost_hlen = nvq->vhost_hlen;
sock_hlen = nvq->sock_hlen;
@@ -715,9 +742,10 @@ static void handle_rx(struct vhost_net *net)
total_len += vhost_len;
if (unlikely(total_len >= VHOST_NET_WEIGHT)) {
vhost_poll_queue(&vq->poll);
- break;
+ goto out;
}
}
+ vhost_net_enable_vq(net, vq);
out:
mutex_unlock(&vq->mutex);
}
@@ -796,32 +824,6 @@ static int vhost_net_open(struct inode *inode, struct file *f)
return 0;
}
-static void vhost_net_disable_vq(struct vhost_net *n,
- struct vhost_virtqueue *vq)
-{
- struct vhost_net_virtqueue *nvq =
- container_of(vq, struct vhost_net_virtqueue, vq);
- struct vhost_poll *poll = n->poll + (nvq - n->vqs);
- if (!vq->private_data)
- return;
- vhost_poll_stop(poll);
-}
-
-static int vhost_net_enable_vq(struct vhost_net *n,
- struct vhost_virtqueue *vq)
-{
- struct vhost_net_virtqueue *nvq =
- container_of(vq, struct vhost_net_virtqueue, vq);
- struct vhost_poll *poll = n->poll + (nvq - n->vqs);
- struct socket *sock;
-
- sock = vq->private_data;
- if (!sock)
- return 0;
-
- return vhost_poll_start(poll, sock->file);
-}
-
static struct socket *vhost_net_stop_vq(struct vhost_net *n,
struct vhost_virtqueue *vq)
{
--
1.8.3.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH V2 2/2] vhost_net: conditionally enable tx polling
2016-05-30 6:47 [PATCH V2 0/2] vhost_net polling optimization Jason Wang
2016-05-30 6:47 ` [PATCH V2 1/2] vhost_net: stop polling socket during rx processing Jason Wang
@ 2016-05-30 6:47 ` Jason Wang
2016-05-30 15:55 ` Michael S. Tsirkin
1 sibling, 1 reply; 7+ messages in thread
From: Jason Wang @ 2016-05-30 6:47 UTC (permalink / raw)
To: mst, kvm, virtualization, netdev, linux-kernel; +Cc: Jason Wang
We always poll tx for socket, this is sub optimal since:
- it will be only used when we exceed the sndbuf of the socket.
- since we use two independent polls for tx and vq, this will slightly
increase the waitqueue traversing time and more important, vhost
could not benefit from commit
9e641bdcfa4ef4d6e2fbaa59c1be0ad5d1551fd5 ("net-tun: restructure
tun_do_read for better sleep/wakeup efficiency") even if we've
stopped rx polling during handle_rx since tx poll were still left in
the waitqueue.
Fix this by conditionally enable tx polling only when -EAGAIN were
met.
Test shows about 8% improvement on guest rx pps.
Before: ~1350000
After: ~1460000
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
drivers/vhost/net.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index e91603b..5a05fa0 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -378,6 +378,7 @@ static void handle_tx(struct vhost_net *net)
goto out;
vhost_disable_notify(&net->dev, vq);
+ vhost_net_disable_vq(net, vq);
hdr_size = nvq->vhost_hlen;
zcopy = nvq->ubufs;
@@ -459,6 +460,8 @@ static void handle_tx(struct vhost_net *net)
% UIO_MAXIOV;
}
vhost_discard_vq_desc(vq, 1);
+ if (err == -EAGAIN)
+ vhost_net_enable_vq(net, vq);
break;
}
if (err != len)
--
1.8.3.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH V2 1/2] vhost_net: stop polling socket during rx processing
2016-05-30 6:47 ` [PATCH V2 1/2] vhost_net: stop polling socket during rx processing Jason Wang
@ 2016-05-30 15:47 ` Michael S. Tsirkin
2016-05-31 3:14 ` Jason Wang
0 siblings, 1 reply; 7+ messages in thread
From: Michael S. Tsirkin @ 2016-05-30 15:47 UTC (permalink / raw)
To: Jason Wang; +Cc: kvm, virtualization, netdev, linux-kernel
On Mon, May 30, 2016 at 02:47:53AM -0400, Jason Wang wrote:
> We don't stop rx polling socket during rx processing, this will lead
> unnecessary wakeups from under layer net devices (E.g
> sock_def_readable() form tun). Rx will be slowed down in this
> way. This patch avoids this by stop polling socket during rx
> processing. A small drawback is that this introduces some overheads in
> light load case because of the extra start/stop polling, but single
> netperf TCP_RR does not notice any change. In a super heavy load case,
> e.g using pktgen to inject packet to guest, we get about ~8.8%
> improvement on pps:
>
> before: ~1240000 pkt/s
> after: ~1350000 pkt/s
>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
> drivers/vhost/net.c | 56 +++++++++++++++++++++++++++--------------------------
> 1 file changed, 29 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index 10ff494..e91603b 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -301,6 +301,32 @@ static bool vhost_can_busy_poll(struct vhost_dev *dev,
> !vhost_has_work(dev);
> }
>
> +static void vhost_net_disable_vq(struct vhost_net *n,
> + struct vhost_virtqueue *vq)
> +{
> + struct vhost_net_virtqueue *nvq =
> + container_of(vq, struct vhost_net_virtqueue, vq);
> + struct vhost_poll *poll = n->poll + (nvq - n->vqs);
> + if (!vq->private_data)
> + return;
> + vhost_poll_stop(poll);
> +}
> +
> +static int vhost_net_enable_vq(struct vhost_net *n,
> + struct vhost_virtqueue *vq)
> +{
> + struct vhost_net_virtqueue *nvq =
> + container_of(vq, struct vhost_net_virtqueue, vq);
> + struct vhost_poll *poll = n->poll + (nvq - n->vqs);
> + struct socket *sock;
> +
> + sock = vq->private_data;
> + if (!sock)
> + return 0;
> +
> + return vhost_poll_start(poll, sock->file);
> +}
> +
> static int vhost_net_tx_get_vq_desc(struct vhost_net *net,
> struct vhost_virtqueue *vq,
> struct iovec iov[], unsigned int iov_size,
BTW we might want to rename these functions, name no longer
reflects function ...
> @@ -627,6 +653,7 @@ static void handle_rx(struct vhost_net *net)
> if (!sock)
> goto out;
> vhost_disable_notify(&net->dev, vq);
> + vhost_net_disable_vq(net, vq);
>
> vhost_hlen = nvq->vhost_hlen;
> sock_hlen = nvq->sock_hlen;
> @@ -715,9 +742,10 @@ static void handle_rx(struct vhost_net *net)
> total_len += vhost_len;
> if (unlikely(total_len >= VHOST_NET_WEIGHT)) {
> vhost_poll_queue(&vq->poll);
> - break;
> + goto out;
> }
> }
> + vhost_net_enable_vq(net, vq);
OK so if sock is readable but RX VQ is empty, this will
immediately schedule another round of handle_rx and so ad
infinitum,
Looks like a bug.
> out:
> mutex_unlock(&vq->mutex);
> }
> @@ -796,32 +824,6 @@ static int vhost_net_open(struct inode *inode, struct file *f)
> return 0;
> }
>
> -static void vhost_net_disable_vq(struct vhost_net *n,
> - struct vhost_virtqueue *vq)
> -{
> - struct vhost_net_virtqueue *nvq =
> - container_of(vq, struct vhost_net_virtqueue, vq);
> - struct vhost_poll *poll = n->poll + (nvq - n->vqs);
> - if (!vq->private_data)
> - return;
> - vhost_poll_stop(poll);
> -}
> -
> -static int vhost_net_enable_vq(struct vhost_net *n,
> - struct vhost_virtqueue *vq)
> -{
> - struct vhost_net_virtqueue *nvq =
> - container_of(vq, struct vhost_net_virtqueue, vq);
> - struct vhost_poll *poll = n->poll + (nvq - n->vqs);
> - struct socket *sock;
> -
> - sock = vq->private_data;
> - if (!sock)
> - return 0;
> -
> - return vhost_poll_start(poll, sock->file);
> -}
> -
> static struct socket *vhost_net_stop_vq(struct vhost_net *n,
> struct vhost_virtqueue *vq)
> {
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V2 2/2] vhost_net: conditionally enable tx polling
2016-05-30 6:47 ` [PATCH V2 2/2] vhost_net: conditionally enable tx polling Jason Wang
@ 2016-05-30 15:55 ` Michael S. Tsirkin
2016-05-31 3:23 ` Jason Wang
0 siblings, 1 reply; 7+ messages in thread
From: Michael S. Tsirkin @ 2016-05-30 15:55 UTC (permalink / raw)
To: Jason Wang; +Cc: kvm, virtualization, netdev, linux-kernel
On Mon, May 30, 2016 at 02:47:54AM -0400, Jason Wang wrote:
> We always poll tx for socket, this is sub optimal since:
>
> - it will be only used when we exceed the sndbuf of the socket.
> - since we use two independent polls for tx and vq, this will slightly
> increase the waitqueue traversing time and more important, vhost
> could not benefit from commit
> 9e641bdcfa4ef4d6e2fbaa59c1be0ad5d1551fd5 ("net-tun: restructure
> tun_do_read for better sleep/wakeup efficiency") even if we've
> stopped rx polling during handle_rx since tx poll were still left in
> the waitqueue.
Why is this an issue?
sock_def_write_space only wakes up when queue is half empty,
not on each packet.
if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf)
I suspect the issue is with your previous patch,
it now pokes at the spinlock on data path
where it used not to.
Is that right?
>
> Fix this by conditionally enable tx polling only when -EAGAIN were
> met.
>
> Test shows about 8% improvement on guest rx pps.
>
> Before: ~1350000
> After: ~1460000
>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
> drivers/vhost/net.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
> index e91603b..5a05fa0 100644
> --- a/drivers/vhost/net.c
> +++ b/drivers/vhost/net.c
> @@ -378,6 +378,7 @@ static void handle_tx(struct vhost_net *net)
> goto out;
>
> vhost_disable_notify(&net->dev, vq);
> + vhost_net_disable_vq(net, vq);
>
> hdr_size = nvq->vhost_hlen;
> zcopy = nvq->ubufs;
> @@ -459,6 +460,8 @@ static void handle_tx(struct vhost_net *net)
> % UIO_MAXIOV;
> }
> vhost_discard_vq_desc(vq, 1);
> + if (err == -EAGAIN)
> + vhost_net_enable_vq(net, vq);
> break;
> }
> if (err != len)
> --
> 1.8.3.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V2 1/2] vhost_net: stop polling socket during rx processing
2016-05-30 15:47 ` Michael S. Tsirkin
@ 2016-05-31 3:14 ` Jason Wang
0 siblings, 0 replies; 7+ messages in thread
From: Jason Wang @ 2016-05-31 3:14 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: kvm, virtualization, netdev, linux-kernel
On 2016年05月30日 23:47, Michael S. Tsirkin wrote:
> On Mon, May 30, 2016 at 02:47:53AM -0400, Jason Wang wrote:
>> We don't stop rx polling socket during rx processing, this will lead
>> unnecessary wakeups from under layer net devices (E.g
>> sock_def_readable() form tun). Rx will be slowed down in this
>> way. This patch avoids this by stop polling socket during rx
>> processing. A small drawback is that this introduces some overheads in
>> light load case because of the extra start/stop polling, but single
>> netperf TCP_RR does not notice any change. In a super heavy load case,
>> e.g using pktgen to inject packet to guest, we get about ~8.8%
>> improvement on pps:
>>
>> before: ~1240000 pkt/s
>> after: ~1350000 pkt/s
>>
>> Signed-off-by: Jason Wang <jasowang@redhat.com>
>> ---
>> drivers/vhost/net.c | 56 +++++++++++++++++++++++++++--------------------------
>> 1 file changed, 29 insertions(+), 27 deletions(-)
>>
>> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
>> index 10ff494..e91603b 100644
>> --- a/drivers/vhost/net.c
>> +++ b/drivers/vhost/net.c
>> @@ -301,6 +301,32 @@ static bool vhost_can_busy_poll(struct vhost_dev *dev,
>> !vhost_has_work(dev);
>> }
>>
>> +static void vhost_net_disable_vq(struct vhost_net *n,
>> + struct vhost_virtqueue *vq)
>> +{
>> + struct vhost_net_virtqueue *nvq =
>> + container_of(vq, struct vhost_net_virtqueue, vq);
>> + struct vhost_poll *poll = n->poll + (nvq - n->vqs);
>> + if (!vq->private_data)
>> + return;
>> + vhost_poll_stop(poll);
>> +}
>> +
>> +static int vhost_net_enable_vq(struct vhost_net *n,
>> + struct vhost_virtqueue *vq)
>> +{
>> + struct vhost_net_virtqueue *nvq =
>> + container_of(vq, struct vhost_net_virtqueue, vq);
>> + struct vhost_poll *poll = n->poll + (nvq - n->vqs);
>> + struct socket *sock;
>> +
>> + sock = vq->private_data;
>> + if (!sock)
>> + return 0;
>> +
>> + return vhost_poll_start(poll, sock->file);
>> +}
>> +
>> static int vhost_net_tx_get_vq_desc(struct vhost_net *net,
>> struct vhost_virtqueue *vq,
>> struct iovec iov[], unsigned int iov_size,
> BTW we might want to rename these functions, name no longer
> reflects function ...
Do you mean adding something reflect busy polling in the name? Then the
name may be too long or have suggestion on the name?
>
>
>> @@ -627,6 +653,7 @@ static void handle_rx(struct vhost_net *net)
>> if (!sock)
>> goto out;
>> vhost_disable_notify(&net->dev, vq);
>> + vhost_net_disable_vq(net, vq);
>>
>> vhost_hlen = nvq->vhost_hlen;
>> sock_hlen = nvq->sock_hlen;
>> @@ -715,9 +742,10 @@ static void handle_rx(struct vhost_net *net)
>> total_len += vhost_len;
>> if (unlikely(total_len >= VHOST_NET_WEIGHT)) {
>> vhost_poll_queue(&vq->poll);
>> - break;
>> + goto out;
>> }
>> }
>> + vhost_net_enable_vq(net, vq);
> OK so if sock is readable but RX VQ is empty, this will
> immediately schedule another round of handle_rx and so ad
> infinitum,
>
> Looks like a bug.
Yes it is, will change the above headcount check to:
/* OK, now we need to know about added descriptors. */
if (!headcount) {
if (unlikely(vhost_enable_notify(&net->dev, vq))) {
/* They have slipped one in as we were
* doing that: check again. */
vhost_disable_notify(&net->dev, vq);
continue;
}
/* Nothing new? Wait for eventfd to tell us
* they refilled. */
goto out;
}
>
>
>> out:
>> mutex_unlock(&vq->mutex);
>> }
>> @@ -796,32 +824,6 @@ static int vhost_net_open(struct inode *inode, struct file *f)
>> return 0;
>> }
>>
>> -static void vhost_net_disable_vq(struct vhost_net *n,
>> - struct vhost_virtqueue *vq)
>> -{
>> - struct vhost_net_virtqueue *nvq =
>> - container_of(vq, struct vhost_net_virtqueue, vq);
>> - struct vhost_poll *poll = n->poll + (nvq - n->vqs);
>> - if (!vq->private_data)
>> - return;
>> - vhost_poll_stop(poll);
>> -}
>> -
>> -static int vhost_net_enable_vq(struct vhost_net *n,
>> - struct vhost_virtqueue *vq)
>> -{
>> - struct vhost_net_virtqueue *nvq =
>> - container_of(vq, struct vhost_net_virtqueue, vq);
>> - struct vhost_poll *poll = n->poll + (nvq - n->vqs);
>> - struct socket *sock;
>> -
>> - sock = vq->private_data;
>> - if (!sock)
>> - return 0;
>> -
>> - return vhost_poll_start(poll, sock->file);
>> -}
>> -
>> static struct socket *vhost_net_stop_vq(struct vhost_net *n,
>> struct vhost_virtqueue *vq)
>> {
>> --
>> 1.8.3.1
> --
> To unsubscribe from this list: send the line "unsubscribe kvm" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [PATCH V2 2/2] vhost_net: conditionally enable tx polling
2016-05-30 15:55 ` Michael S. Tsirkin
@ 2016-05-31 3:23 ` Jason Wang
0 siblings, 0 replies; 7+ messages in thread
From: Jason Wang @ 2016-05-31 3:23 UTC (permalink / raw)
To: Michael S. Tsirkin; +Cc: kvm, virtualization, netdev, linux-kernel
On 2016年05月30日 23:55, Michael S. Tsirkin wrote:
> On Mon, May 30, 2016 at 02:47:54AM -0400, Jason Wang wrote:
>> We always poll tx for socket, this is sub optimal since:
>>
>> - it will be only used when we exceed the sndbuf of the socket.
>> - since we use two independent polls for tx and vq, this will slightly
>> increase the waitqueue traversing time and more important, vhost
>> could not benefit from commit
>> 9e641bdcfa4ef4d6e2fbaa59c1be0ad5d1551fd5 ("net-tun: restructure
>> tun_do_read for better sleep/wakeup efficiency") even if we've
>> stopped rx polling during handle_rx since tx poll were still left in
>> the waitqueue.
> Why is this an issue?
> sock_def_write_space only wakes up when queue is half empty,
> not on each packet.
> if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf)
>
> I suspect the issue is with your previous patch,
> it now pokes at the spinlock on data path
> where it used not to.
>
> Is that right?
The problem is not tx wake up but still rx wake up. Patch 1 removes rx
poll, but still left tx poll. So in sock_def_readable(),
skwq_has_sleeper() returns true, we still need to traverse waitqueue and
touch spinlocks. With this patch, unless a heavy tx load, tx poll were
disabled, sock_def_readable() can return finish very soon.
>
>
>> Fix this by conditionally enable tx polling only when -EAGAIN were
>> met.
>>
>> Test shows about 8% improvement on guest rx pps.
>>
>> Before: ~1350000
>> After: ~1460000
>>
>> Signed-off-by: Jason Wang <jasowang@redhat.com>
>> ---
>> drivers/vhost/net.c | 3 +++
>> 1 file changed, 3 insertions(+)
>>
>> diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
>> index e91603b..5a05fa0 100644
>> --- a/drivers/vhost/net.c
>> +++ b/drivers/vhost/net.c
>> @@ -378,6 +378,7 @@ static void handle_tx(struct vhost_net *net)
>> goto out;
>>
>> vhost_disable_notify(&net->dev, vq);
>> + vhost_net_disable_vq(net, vq);
>>
>> hdr_size = nvq->vhost_hlen;
>> zcopy = nvq->ubufs;
>> @@ -459,6 +460,8 @@ static void handle_tx(struct vhost_net *net)
>> % UIO_MAXIOV;
>> }
>> vhost_discard_vq_desc(vq, 1);
>> + if (err == -EAGAIN)
>> + vhost_net_enable_vq(net, vq);
>> break;
>> }
>> if (err != len)
>> --
>> 1.8.3.1
^ permalink raw reply [flat|nested] 7+ messages in thread
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2016-05-30 6:47 [PATCH V2 0/2] vhost_net polling optimization Jason Wang
2016-05-30 6:47 ` [PATCH V2 1/2] vhost_net: stop polling socket during rx processing Jason Wang
2016-05-30 15:47 ` Michael S. Tsirkin
2016-05-31 3:14 ` Jason Wang
2016-05-30 6:47 ` [PATCH V2 2/2] vhost_net: conditionally enable tx polling Jason Wang
2016-05-30 15:55 ` Michael S. Tsirkin
2016-05-31 3:23 ` Jason Wang
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