From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759152AbYHaVN5 (ORCPT ); Sun, 31 Aug 2008 17:13:57 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752421AbYHaVNs (ORCPT ); Sun, 31 Aug 2008 17:13:48 -0400 Received: from x35.xmailserver.org ([64.71.152.41]:59768 "EHLO x35.xmailserver.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752253AbYHaVNr (ORCPT ); Sun, 31 Aug 2008 17:13:47 -0400 X-AuthUser: davidel@xmailserver.org Date: Sun, 31 Aug 2008 14:13:45 -0700 (PDT) From: Davide Libenzi X-X-Sender: davide@alien.or.mcafeemobile.com To: Arjan van de Ven cc: Linux Kernel Mailing List , tglx@tglx.de, Ingo Molnar , Linus Torvalds , Arnd Bergmann Subject: Re: [patch v2 0/5] Nano/Microsecond resolution for select() and poll() In-Reply-To: <20080831092828.13ae0279@infradead.org> Message-ID: References: <20080831092828.13ae0279@infradead.org> X-GPG-FINGRPRINT: CFAE 5BEE FD36 F65E E640 56FE 0974 BF23 270F 474E X-GPG-PUBLIC_KEY: http://www.xmailserver.org/davidel.asc MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, 31 Aug 2008, Arjan van de Ven wrote: > Note: > even though poll() (as opposed to ppoll()) only accepts milliseconds > as userspace interface, the behavior will still improve because the current > time no longer needs to be rounded up to the next jiffie, so on average > a 500 microseconds behavior improvement. Another way to get down in the timeout resolution for newer kernels, and still supporting the syscalls with millisec timeouts, is to use timerfds. - Davide