Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964850AbbFJTaP (ORCPT ); Wed, 10 Jun 2015 15:30:15 -0400 Received: from mail-ie0-f194.google.com ([209.85.223.194]:34353 "EHLO mail-ie0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964790AbbFJTaJ (ORCPT ); Wed, 10 Jun 2015 15:30:09 -0400 MIME-Version: 1.0 In-Reply-To: <20150610183854.19549.qmail@ns.horizon.com> References: <20150610162738.24160.qmail@ns.horizon.com> <20150610183854.19549.qmail@ns.horizon.com> Date: Wed, 10 Jun 2015 12:30:08 -0700 Message-ID: Subject: Re: Discussion: quick_pit_calibrate is slow From: Arjan van de Ven To: George Spelvin Cc: Peter Zijlstra , adrian.hunter@intel.com, ak@linux.intel.com, Matt Morton , Arjan van de Ven , Borislav Petkov , "H. Peter Anvin" , LKML , luto@amacapital.net, Ingo Molnar , penberg@iki.fi, Thomas Gleixner , Linus Torvalds Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 582 Lines: 14 On Wed, Jun 10, 2015 at 11:38 AM, George Spelvin wrote: > 25 ns is 100 ppm of 0.25 ms, so it should be okay if I go use a measurement > interval of 1 ms or more. > ok so we're good, but I suspect we want to put this in a comment somewhere to prevent someone a year from now thinking they can do 100 usec safely ;-) -- 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/