Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759469AbYH2WYO (ORCPT ); Fri, 29 Aug 2008 18:24:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754729AbYH2WX6 (ORCPT ); Fri, 29 Aug 2008 18:23:58 -0400 Received: from enigma.xbill.org ([204.152.189.153]:37892 "EHLO enigma.xbill.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754710AbYH2WX6 (ORCPT ); Fri, 29 Aug 2008 18:23:58 -0400 X-Greylist: delayed 503 seconds by postgrey-1.27 at vger.kernel.org; Fri, 29 Aug 2008 18:23:58 EDT Date: Fri, 29 Aug 2008 15:15:34 -0700 (PDT) From: Brian Wellington X-X-Sender: bwelling@particle.ddns.nominum.com To: Arjan van de Ven cc: linux-kernel@vger.kernel.org, mingo@elte.hu, tglx@tglx.de, torvalds@linux-foundation.org Subject: Re: [patch 0/5] Nano/Microsecond resolution for select() and poll() In-Reply-To: <20080829080549.6906b744@infradead.org> Message-ID: References: <20080829080549.6906b744@infradead.org> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 786 Lines: 17 On Fri, 29 Aug 2008, Arjan van de Ven wrote: > Today in Linux, select() and poll() operate in jiffies resolution > (granularity), meaning an effective resolution of 1 millisecond (HZ=1000) to > 10 milliseconds (HZ=100). Delays shorter than this are not possible, and all > delays are in multiples of this granularity. Would a similar change also be useful for epoll_wait()? It's unfortunate that there's no way to use epoll with more than millisecond granularity, but it seems like the same arguments could be made as with poll(). Brian -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/