Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 17 Apr 2002 01:35:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 17 Apr 2002 01:35:17 -0400 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:34313 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Wed, 17 Apr 2002 01:35:16 -0400 Date: Tue, 16 Apr 2002 22:34:01 -0700 (PDT) From: Linus Torvalds To: Mark Mielke cc: Robert Love , , Davide Libenzi , Subject: Re: Why HZ on i386 is 100 ? In-Reply-To: <20020417011842.A12455@mark.mielke.cc> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 17 Apr 2002, Mark Mielke wrote: > On Tue, Apr 16, 2002 at 08:57:09PM -0400, Robert Love wrote: > > > > Because that is what Alpha does? It seems to me there is no reason for > > a power-of-two timer value, and using 1024 vs 1000 just makes the math > > and rounding more difficult. > > Only from the perspective of time displayed to a user... :-) No, it also makes it much easier to convert to/from the standard UNIX time formats (ie "struct timeval" and "struct timespec") without any surprises, because a jiffy is exactly representable in both if you have a HZ value of 100 or 100, but not if your HZ is 1024. Linus - 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/