On 2018年07月03日 13:48, Tonghao Zhang wrote:
On Tue, Jul 3, 2018 at 10:12 AM Jason Wang wrote:
On 2018年07月02日 20:57, xiangxia.m@gmail.com wrote:
From: Tonghao Zhang
Factor out generic busy polling logic and will be
used for in tx path in the next patch. And with the patch,
qemu can
On Tue, Jul 3, 2018 at 10:12 AM Jason Wang wrote:
>
>
>
> On 2018年07月02日 20:57, xiangxia.m@gmail.com wrote:
> > From: Tonghao Zhang
> >
> > Factor out generic busy polling logic and will be
> > used for in tx path in the next patch. And with the patch,
> > qemu can set differently the
This patch introduces support for event suppression. This is done by
have a two areas: device area and driver area. One side could then try
to disable or enable (delayed) notification from other side by using a
boolean hint or event index interface in the areas.
For more information, please refer
This patch introduces basic support for packed ring. The idea behinds
packed ring is to use a single descriptor ring instead of three
different rings (avail, used and descriptor). This could help to
reduce the cache contention and PCI transactions. So it was designed
to help for the performance
Signed-off-by: Jason Wang
---
include/uapi/linux/virtio_config.h | 2 ++
include/uapi/linux/virtio_ring.h | 32
2 files changed, 34 insertions(+)
diff --git a/include/uapi/linux/virtio_config.h
b/include/uapi/linux/virtio_config.h
index 449132c..947f6a3
We assumes used ring update is the only user for vhost_put_user() in
the past. This may not be the case for the incoming packed ring which
may update the descriptor ring for used. So introduce a new type
parameter.
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c | 14 +++---
1 file
Two helpers of setting/getting used len were introduced to avoid
explicitly manipulating vhost_used_elem in zerocopy code. This will be
used to hide used_elem internals and simplify packed ring
implementation.
Signed-off-by: Jason Wang
---
drivers/vhost/net.c | 11 +--
Instead of depending on the exported vring_used_elem, this patch
switches to use a new internal structure vhost_used_elem which embed
vring_used_elem in itself. This could be used to let vhost to record
extra metadata for the incoming packed ring layout.
Signed-off-by: Jason Wang
---
We used to return descriptor head by vhost_get_vq_desc() to device and
pass it back to vhost_add_used() and its friends. This exposes the
internal used ring layout to device which makes it hard to be extended for
e.g packed ring layout.
So this patch tries to hide the used ring layout by
-
Move get_rx_bufs() to vhost.c and rename it to
vhost_get_bufs(). This helps to hide vring internal layout from
specific device implementation. Packed ring implementation will
benefit from this.
Signed-off-by: Jason Wang
---
drivers/vhost/net.c | 77
Hi all:
This series implements packed virtqueues. The code were tested with
Tiwei's RFC V6 at https://lkml.org/lkml/2018/6/5/120.
Pktgen test for both RX and TX does not show obvious difference with
split virtqueues. The main bottleneck is the guest Linux driver, since
it can not stress vhost
On Tue, 26 Jun 2018 06:49:02 -0300
Mauro Carvalho Chehab wrote:
> Having nothing to do while waiting for my plane to arrive while
> returning back from Japan, I ended by writing a small series of
> patches meant to reduce the number of bad Documentation/*
> links that are detected by:
>
On 25/06/18 12:29, Jan Beulich wrote:
> This saves one insn byte per instance, summing up to a savings of over
> 4k in my (stripped down) configuration. No variant of to be patched in
> replacement code relies on the one byte larger size.
>
> Signed-off-by: Jan Beulich
Reviewed-by: Juergen
From: Tonghao Zhang
This patch improves the guest receive and transmit performance.
On the handle_tx side, we poll the sock receive queue at the
same time. handle_rx do that in the same way.
We set the poll-us=100us and use the iperf3 to test
its bandwidth, use the netperf to test throughput
From: Tonghao Zhang
Factor out generic busy polling logic and will be
used for in tx path in the next patch. And with the patch,
qemu can set differently the busyloop_timeout for rx queue.
Signed-off-by: Tonghao Zhang
---
drivers/vhost/net.c | 94
From: Tonghao Zhang
Use the VHOST_NET_VQ_XXX as a subclass for mutex_lock_nested.
Signed-off-by: Tonghao Zhang
Acked-by: Jason Wang
---
drivers/vhost/net.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index
From: Tonghao Zhang
This patch changes the way that lock all vqs
at the same, to lock them one by one. It will
be used for next patch to avoid the deadlock.
Signed-off-by: Tonghao Zhang
Acked-by: Jason Wang
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c | 24 +++-
1
From: Tonghao Zhang
This patches improve the guest receive and transmit performance.
On the handle_tx side, we poll the sock receive queue at the same time.
handle_rx do that in the same way.
For more performance report, see patch 4.
v3 -> v4:
fix some issues
v2 -> v3:
This patches are
On 2018年07月02日 16:05, Toshiaki Makita wrote:
On 2018/07/02 16:52, Jason Wang wrote:
On 2018年07月02日 15:11, Toshiaki Makita wrote:
On 2018/07/02 15:17, Jason Wang wrote:
On 2018年07月02日 12:37, Toshiaki Makita wrote:
On 2018/07/02 11:54, Jason Wang wrote:
On 2018年07月02日 10:45, Toshiaki Makita
On 2018/07/02 16:52, Jason Wang wrote:
> On 2018年07月02日 15:11, Toshiaki Makita wrote:
>> On 2018/07/02 15:17, Jason Wang wrote:
>>> On 2018年07月02日 12:37, Toshiaki Makita wrote:
On 2018/07/02 11:54, Jason Wang wrote:
> On 2018年07月02日 10:45, Toshiaki Makita wrote:
>> Hi Jason,
>>
On 2018年07月02日 15:11, Toshiaki Makita wrote:
On 2018/07/02 15:17, Jason Wang wrote:
On 2018年07月02日 12:37, Toshiaki Makita wrote:
On 2018/07/02 11:54, Jason Wang wrote:
On 2018年07月02日 10:45, Toshiaki Makita wrote:
Hi Jason,
On 2018/06/29 18:30, Jason Wang wrote:
On 2018年06月29日 16:09,
On 2018年07月02日 12:37, Toshiaki Makita wrote:
On 2018/07/02 11:54, Jason Wang wrote:
On 2018年07月02日 10:45, Toshiaki Makita wrote:
Hi Jason,
On 2018/06/29 18:30, Jason Wang wrote:
On 2018年06月29日 16:09, Toshiaki Makita wrote:
...
To fix this, poll the work instead of enabling notification
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