From: David Miller <davem@davemloft.net>
To: pabeni@redhat.com
Cc: netdev@vger.kernel.org
Subject: Re: [PATCH net-next] udp/v6: prefetch rmem_alloc in udp6_queue_rcv_skb()
Date: Thu, 22 Jun 2017 13:44:20 -0400 (EDT) [thread overview]
Message-ID: <20170622.134420.722849803202881288.davem@davemloft.net> (raw)
In-Reply-To: <9152ab05a2fe6b6230b44b7a23056b367ca19f5e.1498127002.git.pabeni@redhat.com>
From: Paolo Abeni <pabeni@redhat.com>
Date: Thu, 22 Jun 2017 15:01:22 +0200
> very similar to commit dd99e425be23 ("udp: prefetch
> rmem_alloc in udp_queue_rcv_skb()"), this allows saving a cache
> miss when the BH is bottle-neck for UDP over ipv6 packet
> processing, e.g. for small packets when a single RX NIC ingress
> queue is in use.
>
> Performances under flood when multiple NIC RX queues used are
> unaffected, but when a single NIC rx queue is in use, this
> gives ~8% performance improvement.
>
> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Applied but please look into that DNS lookup regression which was
reported today.
Thank you.
next prev parent reply other threads:[~2017-06-22 17:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-22 13:01 [PATCH net-next] udp/v6: prefetch rmem_alloc in udp6_queue_rcv_skb() Paolo Abeni
2017-06-22 17:44 ` David Miller [this message]
2017-06-22 17:59 ` Paolo Abeni
2017-06-22 20:49 ` Jesper Dangaard Brouer
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