From owner-freebsd-mips@freebsd.org Sat Oct 31 20:15:11 2015 Return-Path: Delivered-To: freebsd-mips@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 59A55A228AA for ; Sat, 31 Oct 2015 20:15:11 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [78.47.246.247]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id EEA271EA7 for ; Sat, 31 Oct 2015 20:15:10 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (root@eg.sd.rdtc.ru [62.231.161.221]) by hz.grosbein.net (8.14.9/8.14.9) with ESMTP id t9VKF303051550 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 31 Oct 2015 21:15:04 +0100 (CET) (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: adrian.chadd@gmail.com Received: from eg.sd.rdtc.ru (eugen@localhost [127.0.0.1]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTP id t9VKExGm053054; Sun, 1 Nov 2015 03:14:59 +0700 (KRAT) (envelope-from eugen@grosbein.net) Subject: Re: CPU underload To: Adrian Chadd References: <56348063.3090508@grosbein.net> <56348239.3050701@grosbein.net> <563500FC.8020201@grosbein.net> Cc: "freebsd-mips@freebsd.org" From: Eugene Grosbein Message-ID: <56352143.7080006@grosbein.net> Date: Sun, 1 Nov 2015 03:14:59 +0700 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM, T_DATE_IN_FUTURE_96_Q autolearn=no version=3.3.2 X-Spam-Report: * 0.0 T_DATE_IN_FUTURE_96_Q Date: is 4 days to 4 months after Received: * date * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on hz.grosbein.net X-BeenThere: freebsd-mips@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Porting FreeBSD to MIPS List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 31 Oct 2015 20:15:11 -0000 On 01.11.2015 01:11, Adrian Chadd wrote: > Hi, > > I don't see any DELAY in my testing, nor MipsUserIntr, so yeah, I must > be doing something different. I've removed options HWPMC_MIPS_BACKTRACE from the kernel and now pmcstat shows no MipsUserIntr and I've got full CPU load for same inter-vlan bridging test: # vmstat 1 procs memory page disks faults cpu r b w avm fre flt re pi po fr sr fl0 md0 in sy cs us sy id 0 0 0 85M 74M 86 0 1 0 66 3 0 0 2633 3117 223 2 40 57 0 0 0 85M 74M 0 0 0 0 0 3 0 0 5049 116 858 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5896 111 738 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 6115 111 687 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 3789 118 499 0 100 0 0 0 0 85M 74M 0 0 0 0 0 3 0 0 3789 111 592 1 99 1 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5474 111 689 1 98 1 0 0 0 85M 74M 0 0 0 0 0 3 0 0 5234 111 762 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 4810 111 648 0 99 1 0 0 0 85M 74M 0 0 0 0 0 3 0 0 4884 111 653 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 4914 111 629 1 99 1 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5679 111 713 0 100 0 0 0 0 85M 74M 0 0 0 0 0 3 0 0 4417 111 698 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 6107 118 621 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 1 4251 111 594 0 100 0 0 0 0 85M 74M 0 0 0 0 0 3 0 0 6050 111 747 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 4487 111 698 0 99 1 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5104 111 624 0 100 0 0 0 0 85M 74M 0 0 0 0 0 3 0 0 4762 115 818 0 99 1 0 0 0 85M 74M 0 0 0 0 0 6 0 0 6223 111 706 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 6020 111 719 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5950 111 818 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5373 118 761 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5488 111 729 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 5527 117 691 0 100 0 0 0 0 85M 74M 0 0 0 0 0 3 0 0 6637 119 916 0 100 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 3980 111 634 1 99 0 0 0 0 85M 74M 0 0 0 0 0 6 0 0 6396 111 932 0 100 0 However, speed is still no more than 59,5MByte/s. Does arge(4) driver support DEVICE_POLLING? When CPU is overloaded with interrupts, userland has no cycles to run.