We can only process 1 packet at one time during sendmsg(). This often
lead bad cache utilization under heavy load. So this patch tries to do
some batching during rx before submitting them to host network
stack. This is done through accepting MSG_MORE as a hint from
sendmsg() caller, if it was set,
This patch tries to do several tweaks on vhost_vq_avail_empty() for a
better performance:
- check cached avail index first which could avoid userspace memory access.
- using unlikely() for the failure of userspace access
- check vq->last_avail_idx instead of cached avail index as the last
step.
This patch tries to utilize tuntap rx batching by peeking the tx
virtqueue during transmission, if there's more available buffers in
the virtqueue, set MSG_MORE flag for a hint for backend (e.g tuntap)
to batch the packets.
Reviewed-by: Stefan Hajnoczi
Signed-off-by: Jason Wang
---
drivers/vhos
Hi:
This series tries to implement tx batching support for vhost. This was
done by using MSG_MORE as a hint for under layer socket. The backend
(e.g tap) can then batch the packets temporarily in a list and
submit it all once the number of bacthed exceeds a limitation.
Tests shows obvious improve
> > - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL);
> > - virtqueue_kick(vq);
> > +static void do_set_resp_bitmap(struct virtio_balloon *vb,
> > + unsigned long base_pfn, int pages)
> >
> > - /* When host has read buffer, this completes via balloon_ack */
> > - wait_event(vb->
> Sent: Wednesday, January 18, 2017 3:11 AM
> To: Li, Liang Z
> Cc: k...@vger.kernel.org; virtio-...@lists.oasis-open.org; qemu-
> de...@nongnu.org; linux...@kvack.org; linux-ker...@vger.kernel.org;
> virtualization@lists.linux-foundation.org; amit.s...@redhat.com; Hansen,
> Dave; cornelia.h...@de.
On Wed, Dec 21, 2016 at 02:52:26PM +0800, Liang Li wrote:
>
> - /* We should always be able to add one buffer to an empty queue. */
> - virtqueue_add_outbuf(vq, &sg, 1, vb, GFP_KERNEL);
> - virtqueue_kick(vq);
> +static void do_set_resp_bitmap(struct virtio_balloon *vb,
> +
On Fri, Jan 13, 2017 at 09:24:22AM +, Li, Liang Z wrote:
> > On Wed, Dec 21, 2016 at 02:52:25PM +0800, Liang Li wrote:
> > > Add a new feature which supports sending the page information with
> > > range array. The current implementation uses PFNs array, which is not
> > > very efficient. Using
On Tue, Jan 17, 2017 at 04:20:49PM +, Rolf Neugebauer wrote:
> Commits:
>
> fd2a0437dc33 virtio_net: introduce virtio_net_hdr_{from,to}_skb
> e858fae2b0b8 virtio_net: use common code for virtio_net_hdr and skb
> GSO conversion
>
> introduced a subtle (but unexplained) difference in how virtio
On Tue, Jan 17, 2017 at 10:05:00PM +0800, Fam Zheng wrote:
> On Tue, 01/17 14:17, Paolo Bonzini wrote:
> >
> >
> > On 16/01/2017 18:26, Fam Zheng wrote:
> > >> Is the endianness correct for big-endian host here?
> > >
> > > I think so. The fc_host sysfs uses u64 to represent port_name and
> > >
On Tue, 01/17 14:17, Paolo Bonzini wrote:
>
>
> On 16/01/2017 18:26, Fam Zheng wrote:
> >> Is the endianness correct for big-endian host here?
> >
> > I think so. The fc_host sysfs uses u64 to represent port_name and node_name,
> > this patch does the same, so using virtio_* helpers for these fie
On 16/01/2017 18:26, Fam Zheng wrote:
>> Is the endianness correct for big-endian host here?
>
> I think so. The fc_host sysfs uses u64 to represent port_name and node_name,
> this patch does the same, so using virtio_* helpers for these fields should
> handle the endianness correctly.
I was sus
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> On Jan 9, 2017, at 11:06 AM, Stefan Hajnoczi wrote:
>
> On Fri, Jan 06, 2017 at 10:22:56AM +0800, Peng Tao wrote:
>> On Tue, Dec 13, 2016 at 5:50 PM, Stefan Hajnoczi wrote:
>>> On Mon, Dec 12, 2016 at 08:21:05PM +0800, Peng Tao wrote:
Currently, if a connect call fails on a signal or tim
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