From: Mathias Krause <mathias.krause@secunet.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>,
Steffen Klassert <steffen.klassert@secunet.com>,
Herbert Xu <herbert@gondor.apana.org.au>,
Dmitry Tarnyagin <dmitry.tarnyagin@lockless.no>,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next 3/3] net: allow to leave the buffer fragmented in skb_cow_data()
Date: Tue, 05 Nov 2013 15:43:10 +0100 [thread overview]
Message-ID: <527903FE.9090505@secunet.com> (raw)
In-Reply-To: <1383661995.4291.137.camel@edumazet-glaptop2.roam.corp.google.com>
On 05.11.2013 15:33, Eric Dumazet wrote:
> On Tue, 2013-11-05 at 14:54 +0100, Mathias Krause wrote:
>> Do not linearize the buffer per se but only if we're expected to expand
>> the tail. All callers can handle fragmented buffers and even expect
>> them!
>>
>> Not linearizing the buffer leads to a small performance improvement for
>> the IPsec receive path in case the network driver passed us a fragmented
>> buffer.
>>
>> With this patch applied I was able to increase the throughput of an
>> IPsec gateway from 7.12 Gbit/s to 7.28 Gbit/s.
>
> What is the driver you used ?
The device driver is ixgbe driving an Intel X520-T2. Why you're asking?
next prev parent reply other threads:[~2013-11-05 14:43 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-05 13:54 [PATCH net-next 0/3] IPsec improvements Mathias Krause
2013-11-05 13:54 ` [PATCH net-next 1/3] net: move pskb_put() to core code Mathias Krause
2013-11-05 18:33 ` Ben Hutchings
2013-11-06 9:01 ` Mathias Krause
2013-11-05 13:54 ` [PATCH net-next 2/3] caif: use pskb_put() instead of reimplementing its functionality Mathias Krause
2013-11-05 13:54 ` [PATCH net-next 3/3] net: allow to leave the buffer fragmented in skb_cow_data() Mathias Krause
2013-11-05 14:33 ` Eric Dumazet
2013-11-05 14:43 ` Mathias Krause [this message]
2013-11-06 9:30 ` Herbert Xu
2013-11-06 9:49 ` Mathias Krause
2013-11-06 9:52 ` Herbert Xu
2013-11-06 12:42 ` Mathias Krause
2013-11-06 12:48 ` Herbert Xu
2013-11-06 16:39 ` Eric Dumazet
2013-11-07 8:56 ` Mathias Krause
2013-11-07 8:55 ` Mathias Krause
2013-11-07 9:01 ` Herbert Xu
2013-11-07 10:01 ` Mathias Krause
2013-11-06 4:48 ` [PATCH net-next 0/3] IPsec improvements David Miller
2013-11-06 9:02 ` Mathias Krause
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