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 and
From: Tonghao Zhang
Factor out generic busy polling logic and will be
used for 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 | 92 ++
From: Tonghao Zhang
Use the VHOST_NET_VQ_XXX as a subclass for mutex_lock_nested.
Signed-off-by: Tonghao Zhang
---
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 e7cf7d2..62bb8e8 100644
--- a/drivers
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
---
drivers/vhost/vhost.c | 24 +++-
1 file changed, 7 insertions(+), 17 deletions(-)
d
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.
This patches are splited from previous big patch:
http://patchwork.ozlabs.org/patch/934673/
For more pe
On 06/25/2018 08:05 PM, Wei Wang wrote:
This patch series is separated from the previous "Virtio-balloon
Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT,
implemented by this series enables the virtio-balloon driver to report
hints of guest free pages to the host. It can be u
On Fri, Jun 29, 2018 at 05:09:50PM +0900, Toshiaki Makita wrote:
> Under heavy load vhost busypoll may run without suppressing
> notification. For example tx zerocopy callback can push tx work while
> handle_tx() is running, then busyloop exits due to vhost_has_work()
> condition and enables notifi
On Fri, Jun 29, 2018 at 03:52:40PM +, Wang, Wei W wrote:
> On Friday, June 29, 2018 10:46 PM, Michael S. Tsirkin wrote:
> > To: David Hildenbrand
> > Cc: Wang, Wei W ; virtio-...@lists.oasis-open.org;
> > linux-ker...@vger.kernel.org; virtualization@lists.linux-foundation.org;
> > k...@vger.ke
>> Why would your suggestion still be applicable?
>>
>> Your point for now is "I might not want to have page hinting enabled due to
>> the overhead, but still a live migration speedup". If that overhead actually
>> exists (we'll have to see) or there might be another reason to disable page
>> hin
On Friday, June 29, 2018 7:54 PM, David Hildenbrand wrote:
> On 29.06.2018 13:31, Wei Wang wrote:
> > On 06/29/2018 03:46 PM, David Hildenbrand wrote:
> >>>
> >>> I'm afraid it can't. For example, when we have a guest booted,
> >>> without too many memory activities. Assume the guest has 8GB free
>
On Friday, June 29, 2018 10:46 PM, Michael S. Tsirkin wrote:
> To: David Hildenbrand
> Cc: Wang, Wei W ; virtio-...@lists.oasis-open.org;
> linux-ker...@vger.kernel.org; virtualization@lists.linux-foundation.org;
> k...@vger.kernel.org; linux...@kvack.org; mho...@kernel.org;
> a...@linux-foundatio
>> And looking at all the discussions and problems that already happened
>> during the development of this series, I think we should rather look
>> into how clean free page hinting might solve the same problem.
>
> I'm not sure I follow the logic. We found that neat tricks
> especially re-using th
On Wed, Jun 27, 2018 at 01:06:32PM +0200, David Hildenbrand wrote:
> On 25.06.2018 14:05, Wei Wang wrote:
> > This patch series is separated from the previous "Virtio-balloon
> > Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT,
> > implemented by this series enables the virt
On 29.06.2018 13:31, Wei Wang wrote:
> On 06/29/2018 03:46 PM, David Hildenbrand wrote:
>>>
>>> I'm afraid it can't. For example, when we have a guest booted, without
>>> too many memory activities. Assume the guest has 8GB free memory. The
>>> arch_free_page there won't be able to capture the 8GB
On 06/29/2018 03:46 PM, David Hildenbrand wrote:
I'm afraid it can't. For example, when we have a guest booted, without
too many memory activities. Assume the guest has 8GB free memory. The
arch_free_page there won't be able to capture the 8GB free pages since
there is no free() called. This res
On 2018年06月29日 16:09, Toshiaki Makita wrote:
Under heavy load vhost busypoll may run without suppressing
notification. For example tx zerocopy callback can push tx work while
handle_tx() is running, then busyloop exits due to vhost_has_work()
condition and enables notification but immediately r
Under heavy load vhost busypoll may run without suppressing
notification. For example tx zerocopy callback can push tx work while
handle_tx() is running, then busyloop exits due to vhost_has_work()
condition and enables notification but immediately reenters handle_tx()
because the pushed work was t
On 29.06.2018 05:51, Wei Wang wrote:
> On 06/27/2018 07:06 PM, David Hildenbrand wrote:
>> On 25.06.2018 14:05, Wei Wang wrote:
>>> This patch series is separated from the previous "Virtio-balloon
>>> Enhancement" series. The new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT,
>>> implemented by this ser
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