From owner-freebsd-net@freebsd.org Mon Aug 26 00:30:41 2019 Return-Path: Delivered-To: freebsd-net@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id A7628CA0CA for ; Mon, 26 Aug 2019 00:30:41 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 46GtFr5YWbz4frh for ; Mon, 26 Aug 2019 00:30:40 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id x7Q0URNA027942 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 26 Aug 2019 00:30:29 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: bu7cher@yandex.ru Received: from [10.58.0.4] (dadv@[10.58.0.4]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id x7Q0UNhx067499 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Mon, 26 Aug 2019 07:30:23 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: finding optimal ipfw strategy To: "Andrey V. Elsukov" , Victor Gamov , freebsd-net@freebsd.org References: <4ff39c8f-341c-5d72-1b26-6558c57bff8d@grosbein.net> <270233d9-fcdb-fee9-2557-c2d1ec7bf9e6@yandex.ru> From: Eugene Grosbein Message-ID: <25f37482-80b7-3aea-2c67-20faedadf429@grosbein.net> Date: Mon, 26 Aug 2019 07:30:22 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <270233d9-fcdb-fee9-2557-c2d1ec7bf9e6@yandex.ru> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * -0.0 SPF_PASS SPF: sender matches SPF record * 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 46GtFr5YWbz4frh X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=permerror (mx1.freebsd.org: domain of eugen@grosbein.net uses mechanism not recognized by this client) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [-4.45 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[3]; TO_DN_SOME(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[grosbein.net]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_PERMFAIL(0.00)[]; NEURAL_HAM_SHORT(-0.98)[-0.977,0]; IP_SCORE(-1.38)[ip: (-3.12), ipnet: 2a01:4f8::/29(-1.96), asn: 24940(-1.79), country: DE(-0.01)]; FREEMAIL_TO(0.00)[yandex.ru]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Aug 2019 00:30:41 -0000 26.08.2019 3:37, Andrey V. Elsukov wrote: > On 24.08.2019 22:34, Eugene Grosbein wrote: >> If you are concerned of performance, general rule applies: less checks, better performance. >> >> First, use 'out xmit' instead of 'out via'. They are semantically equal and this is micro-optimization >> but it still saves extra check unneeded when combined with "out" keyword. >> >> Also, you should use old table numbers instead of new symbolic table names >> when you have many rules checking for interface names and much traffic >> because checks for numbered tables are slightly more efficient. >> You may use symbolic names still at source level: > > There isn't any old tables, all tables have symbolic names. Even when > you are creating "table(1)", its name is converted into symbolic name. Yes, and this code path is slightly more efficient. A bit.