On Tue, Nov 15, 2022 at 10:49 AM Yongji Xie <[email protected]> wrote: > > On Mon, Nov 14, 2022 at 4:55 PM Jason Wang <[email protected]> wrote: > > > > On Mon, Nov 14, 2022 at 4:20 PM Yongji Xie <[email protected]> wrote: > > > > > > On Mon, Nov 14, 2022 at 3:58 PM Jason Wang <[email protected]> wrote: > > > > > > > > On Mon, Nov 14, 2022 at 3:16 PM Xie Yongji <[email protected]> > > > > wrote: > > > > > > > > > > Add sysfs interface for each vduse virtqueue to setup > > > > > irq affinity. This would be useful for performance > > > > > tuning, e.g., mitigate the virtqueue lock contention > > > > > in virtio block driver. > > > > > > > > Do we have any perforamnce numbers for this? > > > > > > > > > > Almost 50% improvement (600k iops -> 900k iops) in the high iops > > > workloads. I have mentioned it in the cover-letter. > > > > For some reason, I miss that. > > > > I also wonder if we can do this automatically, then there's no need to > > play with sysfs which is kind of a burden for the management layer. > > > > This is hard to do since vduse doesn't know which cpu should be bound > for a certain virtqueue.
Probably via the kick_vq()? It probably won't work when notification is disabled. But we need to think a little bit more about this. Requiring management software to do ad-hoc running just for VDUSE seems not easy. Thanks > > Thanks, > Yongji > _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
