netdev - Re: [PATCH v3 net-next 0/4] tcp: better smp listener behavior

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Message-Id: <20151012.192919.95216196401891250.davem@davemloft.net>
Date:	Mon, 12 Oct 2015 19:29:19 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	edumazet@...gle.com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH v3 net-next 0/4] tcp: better smp listener behavior

From: Eric Dumazet <edumazet@...gle.com>
Date: Thu,  8 Oct 2015 19:33:20 -0700

> As promised in last patch series, we implement a better SO_REUSEPORT
> strategy, based on cpu affinities if selected by the application.
> 
> We also moved sk_refcnt out of the cache line containing the lookup
> keys, as it was considerably slowing down smp operations because
> of false sharing. This was simpler than converting listen sockets
> to conventional RCU (to avoid sk_refcnt dirtying)
> 
> Could process 6.0 Mpps SYN instead of 4.2 Mpps on my test server.

Just clarifying that I applied this v3 not v2 which I just replied
to by accident :-)
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