netdev - Re: [PATCH v2 net-next 4/5] xps_flows: XPS for packets that don't have a socket

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Date:   Thu, 29 Sep 2016 09:35:25 -0700
From:   Rick Jones <rick.jones2@....com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        Tom Herbert <tom@...bertland.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Kernel Team <kernel-team@...com>,
        Alexander Duyck <alexander.duyck@...il.com>
Subject: Re: [PATCH v2 net-next 4/5] xps_flows: XPS for packets that don't
 have a socket

On 09/29/2016 06:18 AM, Eric Dumazet wrote:
> Well, then what this patch series is solving ?
>
> You have a producer of packets running on 8 vcpus in a VM.
>
> Packets are exiting the VM and need to be queued on a mq NIC in the
> hypervisor.
>
> Flow X can be scheduled on any of these 8 vcpus, so XPS is currently
> selecting different TXQ.

Just for completeness, in my testing, the VMs were single-vCPU.

rick jones