From owner-freebsd-stable@FreeBSD.ORG Tue Nov 13 12:49:04 2007 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 61F2716A421; Tue, 13 Nov 2007 12:49:04 +0000 (UTC) (envelope-from root@kash.tomsk.ru) Received: from mx.kash.tomsk.ru (ns2.kash.tomsk.ru [88.204.35.2]) by mx1.freebsd.org (Postfix) with ESMTP id 8E26813C4BE; Tue, 13 Nov 2007 12:49:03 +0000 (UTC) (envelope-from root@kash.tomsk.ru) Received: by mx.kash.tomsk.ru (Postfix, from userid 0) id DBE70DAD63; Tue, 13 Nov 2007 18:31:21 +0600 (NOVT) Received: from mx2.freebsd.org (mx2.freebsd.org [69.147.83.53]) by mx.kash.tomsk.ru (Postfix) with ESMTP id 3E026DACE0 for ; Tue, 13 Nov 2007 18:31:19 +0600 (NOVT) Received: from hub.freebsd.org (hub.freebsd.org [IPv6:2001:4f8:fff6::36]) by mx2.freebsd.org (Postfix) with ESMTP id EB5EB60357; Tue, 13 Nov 2007 12:30:40 +0000 (UTC) (envelope-from owner-freebsd-hackers@freebsd.org) Received: from hub.freebsd.org (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id 6FE5116A4FD; Tue, 13 Nov 2007 12:30:40 +0000 (UTC) (envelope-from owner-freebsd-hackers@freebsd.org) Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A337316A417; Tue, 13 Nov 2007 07:43:25 +0000 (UTC) (envelope-from lol@chistydom.ru) Received: from comtv.ru (comtv.ru [217.10.32.17]) by mx1.freebsd.org (Postfix) with ESMTP id BD5A913C4B7; Tue, 13 Nov 2007 07:43:24 +0000 (UTC) (envelope-from lol@chistydom.ru) X-UCL: actv Received: from yoda.org.ru ([83.167.98.162] verified) by comtv.ru (CommuniGate Pro SMTP 4.1.8) with ESMTP id 17898579; Tue, 13 Nov 2007 10:43:11 +0300 Received: from [80.68.244.40] (adm40.relax.ru [80.68.244.40]) (Authenticated sender: llp@soekris.ru) by yoda.org.ru (Postfix) with ESMTP id DB40D28CF5; Tue, 13 Nov 2007 10:43:15 +0300 (MSK) Message-ID: <4739557A.6090209@chistydom.ru> Date: Tue, 13 Nov 2007 10:42:50 +0300 From: Alexey Popov User-Agent: Thunderbird 2.0.0.6 (X11/20070924) MIME-Version: 1.0 To: Panagiotis Christias References: <47137D36.1020305@chistydom.ru> <47149E6E.9000500@chistydom.ru> <4715035D.2090802@FreeBSD.org> <4715C297.1020905@chistydom.ru> <4715C5D7.7060806@FreeBSD.org> <471EE4D9.5080307@chistydom.ru> <4723BF87.20302@FreeBSD.org> <47344E47.9050908@chistydom.ru> <47349A17.3080806@FreeBSD.org> <47373B43.9060406@chistydom.ru> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Mailman-Approved-At: Tue, 13 Nov 2007 12:30:35 +0000 X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Sender: owner-freebsd-hackers@freebsd.org Errors-To: owner-freebsd-hackers@freebsd.org X-DSPAM-Result: Innocent X-DSPAM-Processed: Tue Nov 13 18:31:21 2007 X-DSPAM-Confidence: 0.9980 X-DSPAM-Probability: 0.0000 X-DSPAM-Signature: 47399919191321335389820 X-DSPAM-Factors: 27, From*Alexey, 0.00031, With+best, 0.00031, best+regards, 0.00031, regards+Alexey, 0.00032, Alexey, 0.00054, Sender*owner+freebsd, 0.00140, Sender*freebsd, 0.00140, List-Post*freebsd, 0.00140, List-Post* List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 13 Nov 2007 12:49:04 -0000 Hi. Panagiotis Christias wrote: >>>>> In the "good" case you are getting a much higher interrupt rate but >>>>> with the data you provided I can't tell where from. You need to run >>>>> vmstat -i at regular intervals (e.g. every 10 seconds for a minute) >>>>> during the "good" and "bad" times, since it only provides counters >>>>> and an average rate over the uptime of the system. >>>> Now I'm running 10-process lighttpd and the problem became no so big. >>>> >>>> I collected interrupt stats and it shows no relation beetween >>>> ionterrupts and slowdowns. Here is it: >>>> http://83.167.98.162/gprof/intr-graph/ >>>> >>>> Also I have similiar statistics on mutex profiling and it shows >>>> there's no problem in mutexes. >>>> http://83.167.98.162/gprof/mtx-graph/mtxgifnew/ >>>> >>>> I have no idea what else to check. >>> I don't know what this graph is showing me :) When precisely is the >>> system behaving poorly? > what is your RAID controller configuration (read ahead/cache/write > policy)? I have seen weird/bogus numbers (~100% busy) reported by > systat -v when read ahead was enabled on LSI/amr controllers. ********************************************************************** Existing Logical Drive Information By LSI Logic Corp.,USA ********************************************************************** [Note: For SATA-2, 4 and 6 channel controllers, please specify Ch=0 Id=0..15 for specifying physical drive(Ch=channel, Id=Target)] Logical Drive : 0( Adapter: 0 ): Status: OPTIMAL --------------------------------------------------- SpanDepth :01 RaidLevel: 5 RdAhead : Adaptive Cache: DirectIo StripSz :064KB Stripes : 6 WrPolicy: WriteBack Logical Drive 0 : SpanLevel_0 Disks Chnl Target StartBlock Blocks Physical Target Status ---- ------ ---------- ------ ---------------------- 0 00 0x00000000 0x22ec0000 ONLINE 0 01 0x00000000 0x22ec0000 ONLINE 0 02 0x00000000 0x22ec0000 ONLINE 0 03 0x00000000 0x22ec0000 ONLINE 0 04 0x00000000 0x22ec0000 ONLINE 0 05 0x00000000 0x22ec0000 ONLINE I tried to run with disabled Read-ahead, but it didn't help. With best regards, Alexey Popov _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"