From owner-freebsd-performance@FreeBSD.ORG Fri Jan 28 16:15:56 2011 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 5FA71106566B for ; Fri, 28 Jan 2011 16:15:56 +0000 (UTC) (envelope-from stefan.lambrev@moneybookers.com) Received: from g1.moneybookers.com (g1.moneybookers.com [217.18.249.148]) by mx1.freebsd.org (Postfix) with ESMTP id D96B48FC08 for ; Fri, 28 Jan 2011 16:15:55 +0000 (UTC) Received: from g1.moneybookers.com (localhost [127.0.0.1]) by g1.moneybookers.com (Postfix) with ESMTPS id CB156272C6D; Fri, 28 Jan 2011 17:15:54 +0100 (CET) Received: from jailbay5-inferno.sf.moneybookers.net (jailbay5-inferno.sf.moneybookers.net [10.128.2.69]) by g1.moneybookers.com (Postfix) with ESMTP id 04911272C6C; Fri, 28 Jan 2011 17:15:54 +0100 (CET) Received: from hater.sf.moneybookers.net (hater.sf.moneybookers.net [10.129.23.125]) by jailbay5-inferno.sf.moneybookers.net (Postfix) with ESMTP id DC6E9361218D; Fri, 28 Jan 2011 17:15:53 +0100 (CET) Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: text/plain; charset=us-ascii From: Stefan Lambrev In-Reply-To: <20110128161035.GF18170@zxy.spb.ru> Date: Fri, 28 Jan 2011 18:15:53 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20110128143355.GD18170@zxy.spb.ru> <22E77EED-6455-4164-9115-BBD359EC8CA6@moneybookers.com> <20110128161035.GF18170@zxy.spb.ru> To: Slawa Olhovchenkov X-Mailer: Apple Mail (2.1082) X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on g1.sf.moneybookers.net Cc: freebsd-performance@freebsd.org Subject: Re: Interrupt performance X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 28 Jan 2011 16:15:56 -0000 The overhead comes from badly written software. This software is optimized for linux and you have to optimize it for = freebsd, then you will have the same overhead. All those *popular* benchmarks like hping, iperf, netperf have some = strange optimizations for linux - we call them linuxism. Just search the archives - I'm pretty sure patches are flying around. On Jan 28, 2011, at 6:10 PM, Slawa Olhovchenkov wrote: > On Fri, Jan 28, 2011 at 06:03:15PM +0200, Stefan Lambrev wrote: >=20 >> Do the test with netblast ;) >> Most perf tools are written badly and for Linux. >> In our internal test netblast running on freebsd outperform = everything else. >=20 > I don't speak about bad performance. > I speak about overhead. >=20 > Linux: overhead 7% for 56K int/s > FreeBSD: overhead 59% for 14K int/s >=20 > For processing 1/4 interrupts FreeBSD need 8x CPU. >=20 >> P.S. - /usr/src/tools/tools/netrate/netblast - we have tested little = more expensive card - em/igb and bce. >>=20 >> On Jan 28, 2011, at 4:33 PM, Slawa Olhovchenkov wrote: >>=20 >>> I test network performance and found some strange result -- on the >>> same hardware Linux more then 10x used CPU resources for interrupt >>> processing. >>>=20 >>> FreeBSD system utilise 70% CPU (32% idle, 59% interrupt, 9% sys) and >>> network card generate 14K-18K interrupt per second. >>>=20 >>> Linux system utilise 20% CPU (80% idle, 13% system, 3% hiq, 4% siq) >>> and network card generate 56K interrupt per second. >>>=20 >>> I used 'netperf -H host -t UDP_STREAM -l 60 -C -c -- -m 8972 -s >>> 128K -S 128K' for generate network traffic. >>>=20 >>> NIC: >>>=20 >>> re0: port = 0x4000-0x40ff mem 0xf0100000-0xf01000ff irq 19 at device 4.0 on pci11 >>> re0: Chip rev. 0x18000000 >>> re0: MAC rev. 0x00000000 >>> miibus0: on re0 >>> rgephy0: PHY 1 on miibus0 >>>=20 >>>=20 >>> CPU: >>>=20 >>> CPU: Intel(R) Celeron(R) CPU 420 @ 1.60GHz (1596.05-MHz = K8-class CPU) >>> Origin =3D "GenuineIntel" Id =3D 0x10661 Family =3D 6 Model =3D = 16 >>> Stepping =3D 1 >>> = Features=3D0xafebfbff >>> Features2=3D0xe31d >>> AMD Features=3D0x20100800 >>> AMD Features2=3D0x1 >>> TSC: P-state invariant >>>=20 >>> RAM: one DDR2-667 DIMM. >>>=20 >>> OS: 8.2-RC2, amd64 >>>=20 >>> _______________________________________________ >>> freebsd-performance@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >>> To unsubscribe, send any mail to = "freebsd-performance-unsubscribe@freebsd.org" >>=20 >> -- >> Best Wishes, >> Stefan Lambrev >> ICQ# 24134177 >>=20 >>=20 >>=20 >>=20 >>=20 >> _______________________________________________ >> freebsd-performance@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-performance >> To unsubscribe, send any mail to = "freebsd-performance-unsubscribe@freebsd.org" -- Best Wishes, Stefan Lambrev ICQ# 24134177