From: Eric Dumazet <eric.dumazet@gmail.com>
To: Tom Herbert <therbert@google.com>
Cc: David Miller <davem@davemloft.net>,
Linux Netdev List <netdev@vger.kernel.org>
Subject: Re: [PATCH net-next 1/2] udp: UDP Fast Port
Date: Wed, 06 Aug 2014 17:41:03 +0200 [thread overview]
Message-ID: <1407339663.11943.15.camel@edumazet-glaptop2.roam.corp.google.com> (raw)
In-Reply-To: <CA+mtBx_kXTU8Dyn-bR8W2EnrZqU8Rp-2MeP2R2nv3L67aoh==Q@mail.gmail.com>
On Tue, 2014-07-29 at 16:21 -0700, Tom Herbert wrote:
> We still need a context to do the decap though. If we were able to use
> the socket only with rcu and without taking a reference we could just
> call encap_rcv directly from the lookup. I suppose it might be
> plausible to have socket point to another context data structure which
> could be accessed with just rcu protection...
I'll work on UDP stack to get rid of SLAB_DESTROY_BY_RCU, to avoid
refcount atomic ops, and make receiver side faster.
1) UDP sockets are way smaller than TCP ones.
2) Applications wanting fast UDP communications do not
allocate/deallocate sockets for short amount of time.
(netperf has -t TCP_CRR , but no UDP_CRR for example)
prev parent reply other threads:[~2014-08-06 15:41 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-26 22:29 [PATCH net-next 1/2] udp: UDP Fast Port Tom Herbert
2014-07-28 14:20 ` Eric Dumazet
2014-07-29 22:29 ` David Miller
2014-07-29 23:21 ` Tom Herbert
2014-08-06 15:41 ` Eric Dumazet [this message]
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