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From: Paolo Abeni <pabeni@redhat.com>
To: David Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net-next] udp: prefetch rmem_alloc in udp_queue_rcv_skb()
Date: Wed, 21 Jun 2017 18:07:37 +0200	[thread overview]
Message-ID: <1498061257.2799.15.camel@redhat.com> (raw)
In-Reply-To: <20170621.114155.502883498671476879.davem@davemloft.net>

On Wed, 2017-06-21 at 11:41 -0400, David Miller wrote:
> From: Paolo Abeni <pabeni@redhat.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@redhat.com>
> 
> Applied, but what about ipv6?

You are right, that was unintentionally left out. I'll do some tests
and send another patch for ipv6, too.

Thanks,

Paolo

      reply	other threads:[~2017-06-21 16:22 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-06-21  8:24 [PATCH net-next] udp: prefetch rmem_alloc in udp_queue_rcv_skb() Paolo Abeni
2017-06-21 15:41 ` David Miller
2017-06-21 16:07   ` Paolo Abeni [this message]

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