From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: tbench regression on each kernel release from 2.6.22 -> 2.6.28 Date: Mon, 11 Aug 2008 14:50:47 -0700 (PDT) Message-ID: <20080811.145047.105665450.davem@davemloft.net> References: <48A086B6.2000901@linux-foundation.org> <20080811.141501.01468546.davem@davemloft.net> <48A0B037.501@linux-foundation.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org To: cl@linux-foundation.org Return-path: In-Reply-To: <48A0B037.501@linux-foundation.org> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org From: Christoph Lameter Date: Mon, 11 Aug 2008 16:33:43 -0500 > Maybe what we are seeing is general bloat in kernel execution paths > due to the growth in complexity? It could be, and any kind of analysis into this would be great. I had a change that RCU destroyed sockets and this added a tiny bit of latency, so I never added it even though it would have allowed a lot of simplification of socket handling (which I though would make up for RCU's latency, but it didn't).