Re: [PATCH net-next v5 0/4] net: vhost: improve performance when enable busyloop

[Jason Wang <jasowang@redhat.com>]

On 2018年07月11日 11:49, Tonghao Zhang wrote:
> On Wed, Jul 11, 2018 at 10:56 AM Jason Wang <jasowang@redhat.com> wrote:
>>
>>
>> On 2018年07月04日 12:31, xiangxia.m.yue@gmail.com wrote:
>>> From: Tonghao Zhang <xiangxia.m.yue@gmail.com>
>>>
>>> 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.
>>>
>>> v4 -> v5:
>>> fix some issues
>>>
>>> v3 -> v4:
>>> fix some issues
>>>
>>> v2 -> v3:
>>> This patches are splited from previous big patch:
>>> http://patchwork.ozlabs.org/patch/934673/
>>>
>>> Tonghao Zhang (4):
>>>     vhost: lock the vqs one by one
>>>     net: vhost: replace magic number of lock annotation
>>>     net: vhost: factor out busy polling logic to vhost_net_busy_poll()
>>>     net: vhost: add rx busy polling in tx path
>>>
>>>    drivers/vhost/net.c   | 108 ++++++++++++++++++++++++++++----------------------
>>>    drivers/vhost/vhost.c |  24 ++++-------
>>>    2 files changed, 67 insertions(+), 65 deletions(-)
>>>
>> Hi, any progress on the new version?
>>
>> I plan to send a new series of packed virtqueue support of vhost. If you
>> plan to send it soon, I can wait. Otherwise, I will send my series.
> I rebase the codes. and find there is no improvement anymore, the
> patches of  makita  may solve the problem. jason you may send your
> patches, and I will do some research on busypoll.

I see. Maybe you can try some bi-directional traffic.

Btw, lots of optimizations could be done for busy polling. E.g 
integrating with host NAPI busy polling or a 100% busy polling 
vhost_net. You're welcome to work or propose new ideas.

Thanks

>
>> Thanks