From owner-freebsd-net@FreeBSD.ORG Fri Jul 22 22:33:47 2011 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 08383106566B for ; Fri, 22 Jul 2011 22:33:47 +0000 (UTC) (envelope-from yanegomi@gmail.com) Received: from mail-vw0-f45.google.com (mail-vw0-f45.google.com [209.85.212.45]) by mx1.freebsd.org (Postfix) with ESMTP id C00808FC13 for ; Fri, 22 Jul 2011 22:33:46 +0000 (UTC) Received: by vws17 with SMTP id 17so2842083vws.18 for ; Fri, 22 Jul 2011 15:33:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=QOkHqLJmgYvGAI/D+t58UgoNx9CWR6D9z9hf8v15dmc=; b=SQTwAh2WAZQarQve6p1bdZ0JnBFj16X6fNSuGAFRD/g1RgNniqa0vf7V9cCeIwywwx tmo985+bdm/c8yJuZeaweUIltemGsG4xMXxw6MJ2Dk41l22czNf6FnVIlFG/QjGfiZiN e9PjEOk5ckvrq1RXyuSgkZ81Sa5lWfRo70Lds= MIME-Version: 1.0 Received: by 10.220.117.136 with SMTP id r8mr577692vcq.109.1311372622834; Fri, 22 Jul 2011 15:10:22 -0700 (PDT) Received: by 10.220.181.133 with HTTP; Fri, 22 Jul 2011 15:10:22 -0700 (PDT) Date: Fri, 22 Jul 2011 15:10:22 -0700 Message-ID: From: Garrett Cooper To: freebsd-net@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 Subject: What is slowhz? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 22 Jul 2011 22:33:47 -0000 I see this comment, and I've found references to a net.inet.tcp.slowhz in Free, Net, and OpenBSDs, but this value can't be queried anymore. # grep -r slowhz /sys/ /sys/netinet/ip.h:#define IPFRAGTTL 60 /* time to live for frags, slowhz */ Could someone please confirm that slowhz is indeed a half second value [1], or was it tunable / does it matter anymore? For additional context, I'm trying to map IP-MIB::ipReasmTimeout to a value used in the FreeBSD networking stack, and it looks like that value is the best candidate. Thanks! -Garrett 1. http://markmail.org/message/3xvte6uxrhyb4spn