From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next-2.6] net: __alloc_skb() speedup Date: Wed, 05 May 2010 01:26:47 -0700 (PDT) Message-ID: <20100505.012647.260083711.davem@davemloft.net> References: <1272993054.2245.21.camel@edumazet-laptop> <20100505.010658.48498744.davem@davemloft.net> <1273047734.2367.3.camel@edumazet-laptop> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, hadi@cyberus.ca, therbert@google.com To: eric.dumazet@gmail.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:50857 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932155Ab0EEI0k (ORCPT ); Wed, 5 May 2010 04:26:40 -0400 In-Reply-To: <1273047734.2367.3.camel@edumazet-laptop> Sender: netdev-owner@vger.kernel.org List-ID: From: Eric Dumazet Date: Wed, 05 May 2010 10:22:14 +0200 > You mean memset() wont be inlined by ompiler to plain memory writes, but > use the custom kernel memset() ? I hope memset() is never inlined for a 202 byte piece of memory on sparc64 or powerpc. What happens and makes sense on x86 is x86's business :-) Especially since that elides the cache invalidate optimizations, and for anything >= 64 bytes those are absolutely critical on Niagara.