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Re: pserialize & hw interrupt

On Tue, Dec 9, 2014 at 2:35 PM, Masao Uebayashi <> wrote:
> I see that vioif(4) schedules another softint from within
> vioif_rx_vq_done(), that would latency a bit longer.

Good point. If I directly call vioif_rx_softint, the performance
improves regardless of softint-ed interrupts on/off. The two
performance are almost same and better than the vanilla.

In the case of softint-ed interrupts on, I think we can safely
remove the indirection. OTOH, in the case of off, I'm not sure
we can do the same thing.

>> +#define VIRTIO_F_PCI_INTR_SOFTINT (2 << 0)
> Usually (1 << 1).

Oops. You're right. Fixed.


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