From owner-freebsd-stable@FreeBSD.ORG Tue Nov 3 08:29:33 2009 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EE051106566C for ; Tue, 3 Nov 2009 08:29:33 +0000 (UTC) (envelope-from gphoto6@gmail.com) Received: from mail-gx0-f214.google.com (mail-gx0-f214.google.com [209.85.217.214]) by mx1.freebsd.org (Postfix) with ESMTP id A84EF8FC08 for ; Tue, 3 Nov 2009 08:29:33 +0000 (UTC) Received: by gxk6 with SMTP id 6so622046gxk.13 for ; Tue, 03 Nov 2009 00:29:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:date:message-id:subject :from:to:content-type; bh=tzHAg6L07eTskprB2frLlLZUSWl9XfizrwKCv6OInEs=; b=ePIu9NBplCKO5Fnp91maRNG5CGz8WzOK/Y5jJ4lxh238822KWPTLx3z1pDiSPm4+nk sM0Zhh/AOsxlYvCJM1TDCIA9FLdHCB5urHCdPuaGwqRuGHvOcvKNXaVPWBVheiE+t0YG 7EgpUZBEU/WQzsg544EAKGVFLE6SzmTAdHvFw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=e0kTuv63qNFzSyKnvfWptuCVG75FqMUEyimHOF73cUCsBDeiedFxc6Jfm8V6j6/hMg 6qkfXbxBx3trRd5t0WpalPcUV/NQ2UpnJ4cc43Fmw2HEuhQ6fSovigJKgr+2Exwv8y8L vHUYqqI4dpbXfH4G4NrytQfgGQEiS+y+grx8Y= MIME-Version: 1.0 Received: by 10.101.200.37 with SMTP id c37mr726045anq.10.1257236971636; Tue, 03 Nov 2009 00:29:31 -0800 (PST) Date: Tue, 3 Nov 2009 16:29:31 +0800 Message-ID: <1f51039c0911030029k7e25e3bcxea941ff542311d59@mail.gmail.com> From: Tim Chen To: freebsd-stable@freebsd.org Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Subject: Increasing number of "requests for jumbo clusters denied" in netstat -m X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 03 Nov 2009 08:29:34 -0000 My machine is an IBM HS21 blade server and the NIC is bce. bce1: mem 0xd8000000-0xd9ffffff irq 19 at device 0.0 on pci6 miibus1: on bce1 bce1: Ethernet address: 00:1a:64:34:f2:fa bce1: [ITHREAD] bce1: ASIC (0x57081021); Rev (B2); Bus (PCI-X, 64-bit, 133MHz); B/C (0x03040405) ; Flags( MSI ) That machine is serving as a mail and web server. Recently I found that the number of "requests for jumbo clusters denied" in netstat -m increases all the time. 1031/3469/4500 mbufs in use (current/cache/total) 510/3326/3836/32768 mbuf clusters in use (current/cache/total/max) 510/2278 mbuf+clusters out of packet secondary zone in use (current/cache) 1/1453/1454/8704 4k (page size) jumbo clusters in use (current/cache/total/max) 510/1086/1596/4352 9k jumbo clusters in use (current/cache/total/max) 0/0/0/2176 16k jumbo clusters in use (current/cache/total/max) 5871K/23105K/28977K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/4337166/0 requests for jumbo clusters denied (4k/9k/16k) 0/0/0 sfbufs in use (current/peak/max) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile 0 calls to protocol drain routines ifconfig shows: bce1: flags=8843 metric 0 mtu 9000 options=1bb ether 00:1a:64:34:f2:fa inet 192.168.152.152 netmask 0xffffff00 broadcast 192.168.152.255 media: Ethernet autoselect (1000baseSX ) status: active And in rc.conf: ifconfig_bce1="inet 192.168.152.152 netmask 255.255.255.0 mtu 9000" Is the problem of increasing "requests for jumbo clusters denied" resulted from my "mtu 9000" jumbo frame setting? Will it be the problem of "bce" nic's driver or hardware? Most of all, how will my system be efftected by that ""requests for jumbo clusters denied" problem? Will it degrade the performance or it is harmless? Thanks for your help. BR, Tim Chen