Re: [PATCH v2 09/11] vduse: Add enable_irq_wq sysfs interface for virtqueues
From: Yongji Xie
Date: Mon Dec 19 2022 - 01:39:53 EST
On Fri, Dec 16, 2022 at 1:43 PM Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
> On Mon, Dec 5, 2022 at 5:03 PM Xie Yongji <xieyongji@xxxxxxxxxxxxx> wrote:
> >
> > Add enable_irq_wq sysfs interface to control whether
> > use workqueue to inject irq or not. The vhost-vdpa case
> > can benefit from it.
>
> Do we have a benchmark result for this?
>
It can reduce 2~3 us latency in our sync I/O test.
> Or I wonder if we can extend set_vq_cb() by associating an eventfd
> then VDUSE can signal that eventfd directly?
>
It looks good to me. I can try this way in v3.
Thanks,
Yongji