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SubjectRe: [PATCH RFC 0/4] vsock/virtio: optimizations to increase the throughput
On Thu, Apr 04, 2019 at 12:58:34PM +0200, Stefano Garzarella wrote:
> This series tries to increase the throughput of virtio-vsock with slight
> changes:
> - patch 1/4: reduces the number of credit update messages sent to the
> transmitter
> - patch 2/4: allows the host to split packets on multiple buffers,
> in this way, we can remove the packet size limit to
> VIRTIO_VSOCK_DEFAULT_RX_BUF_SIZE
> - patch 3/4: uses VIRTIO_VSOCK_MAX_PKT_BUF_SIZE as the max packet size
> allowed
> - patch 4/4: increases RX buffer size to 64 KiB (affects only host->guest)
>
> RFC:
> - maybe patch 4 can be replaced with multiple queues with different
> buffer sizes or using EWMA to adapt the buffer size to the traffic
>
> - as Jason suggested in a previous thread [1] I'll evaluate to use
> virtio-net as transport, but I need to understand better how to
> interface with it, maybe introducing sk_buff in virtio-vsock.
>
> Any suggestions?

Great performance results, nice job!

Please include efficiency numbers (bandwidth / CPU utilization) in the
future. Due to the nature of these optimizations it's unlikely that
efficiency has decreased, so I'm not too worried about it this time.
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