From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx106.postini.com [74.125.245.106]) by kanga.kvack.org (Postfix) with SMTP id 15F7C6B0069 for ; Tue, 5 Jun 2012 11:06:06 -0400 (EDT) Date: Tue, 5 Jun 2012 09:40:28 -0500 (CDT) From: Christoph Lameter Subject: Re: [PATCH 3/3] vmevent: Implement special low-memory attribute In-Reply-To: Message-ID: References: <20120501132409.GA22894@lizard> <20120501132620.GC24226@lizard> <4FA35A85.4070804@kernel.org> <20120504073810.GA25175@lizard> <20120507121527.GA19526@lizard> <4FA82056.2070706@gmail.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: KOSAKI Motohiro Cc: Pekka Enberg , Anton Vorontsov , Minchan Kim , Leonid Moiseichuk , John Stultz , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org, kernel-team@android.com On Tue, 8 May 2012, KOSAKI Motohiro wrote: > 4) Currently, vmstat have per-cpu batch and vmstat updating makes 3 > second delay at maximum. Nope. The delay is one second only and it is limited to a certain amount per cpu. There is a bound on the inaccuracy of the counter. If you want to have them more accurate then the right approach is to limit the threshhold. The more accurate the higher the impact of cache line bouncing. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org