From owner-freebsd-hackers Sun Sep 23 22:14:11 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by hub.freebsd.org (Postfix) with ESMTP id 60BE137B42A for ; Sun, 23 Sep 2001 22:14:08 -0700 (PDT) Received: from critter (localhost [127.0.0.1]) by critter.freebsd.dk (8.11.4/8.11.4) with ESMTP id f8O5Dmv07142; Mon, 24 Sep 2001 07:13:49 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: Julian Elischer Cc: Matt Dillon , David Greenman , Seigo Tanimura , bright@wintelcom.net, hackers@FreeBSD.ORG Subject: Re: Conclusions on... was Re: More on the cache_purgeleafdirs() routine In-Reply-To: Your message of "Sun, 23 Sep 2001 14:22:11 PDT." <3BAE5283.C7B434CF@elischer.org> Date: Mon, 24 Sep 2001 07:13:48 +0200 Message-ID: <7140.1001308428@critter> From: Poul-Henning Kamp Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG In message <3BAE5283.C7B434CF@elischer.org>, Julian Elischer writes: >Matt Dillon wrote: >> >> :Block input operations is the one notable exception and it tells a >> :very interesting story: Matts patch results in a 4% increase, but >> :combined with vmdirioenable it results in a 21.5% decrease. >> : >> :That's pretty darn significant: one out of every five I/O have >> :been saved. > >Notice that both the user and system times increased.. Not significantly. As I already said: they are inside the standard deviation and therefore concluding anything from them is bogus. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message