netdev - Re: [PATCH net-next] net: sched: run ingress qdisc without locks

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Message-Id: <20150503.234229.1652771210116002653.davem@davemloft.net>
Date:	Sun, 03 May 2015 23:42:29 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	ast@...mgrid.com
Cc:	john.r.fastabend@...el.com, jhs@...atatu.com, daniel@...earbox.net,
	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: sched: run ingress qdisc without locks

From: Alexei Starovoitov <ast@...mgrid.com>
Date: Thu, 30 Apr 2015 20:14:07 -0700

> TC classifiers/actions were converted to RCU by John in the series:
> http://thread.gmane.org/gmane.linux.network/329739/focus=329739
> and many follow on patches.
> This is the last patch from that series that finally drops
> ingress spin_lock.
> 
> Single cpu ingress+u32 performance goes from 22.9 Mpps to 24.5 Mpps.
> 
> In two cpu case when both cores are receiving traffic on the same
> device and go into the same ingress+u32 the performance jumps
> from 4.5 + 4.5 Mpps to 23.5 + 23.5 Mpps
> 
> Signed-off-by: John Fastabend <john.r.fastabend@...el.com>
> Signed-off-by: Alexei Starovoitov <ast@...mgrid.com>

Applied, thanks.
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