netdev - Re: [PATCH net-next] udp: prefetch rmem_alloc in udp_queue_rcv

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Message-Id: <20170621.114155.502883498671476879.davem@davemloft.net>
Date:   Wed, 21 Jun 2017 11:41:55 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     pabeni@...hat.com
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next] udp: prefetch rmem_alloc in
 udp_queue_rcv_skb()

From: Paolo Abeni <pabeni@...hat.com>
Date: Wed, 21 Jun 2017 10:24:40 +0200

> On UDP packets processing, if the BH is the bottle-neck, it
> always sees a cache miss while updating rmem_alloc; try to
> avoid it prefetching the value as soon as we have the socket
> available.
> 
> Performances under flood with multiple NIC rx queues used are
> unaffected, but when a single NIC rx queue is in use, this
> gives ~10% performance improvement.
> 
> Signed-off-by: Paolo Abeni <pabeni@...hat.com>

Applied, but what about ipv6?