From owner-freebsd-mips@freebsd.org Sat Oct 31 17:57:34 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 3EF4FA21FDF for ; Sat, 31 Oct 2015 17:57:34 +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 D48C01DE1 for ; Sat, 31 Oct 2015 17:57:32 +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 t9VHvLfx051164 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Sat, 31 Oct 2015 18:57:22 +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 t9VHvGXM051206; Sun, 1 Nov 2015 00:57:16 +0700 (KRAT) (envelope-from eugen@grosbein.net) Subject: Re: CPU underload To: Adrian Chadd References: <56348063.3090508@grosbein.net> <56348239.3050701@grosbein.net> Cc: "freebsd-mips@freebsd.org" From: Eugene Grosbein X-Enigmail-Draft-Status: N1110 Message-ID: <563500FC.8020201@grosbein.net> Date: Sun, 1 Nov 2015 00:57:16 +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 17:57:34 -0000 On 31.10.2015 19:52, Adrian Chadd wrote: > hi, > > there's a mips callchain kernel option. Sorry, I'm on my mac atm so I > can't tell you. look in sys/conf/options for callchain, callgraph, > etc. It's a build option. > > Just rebuild your kernel with that and check. Please tell me how do you test bridging performance. I've tried to test inter-vlan bridging using FTP transit traffic and it is still not very fast, although a bit faster than forwarding: 37MByte/s according to systat -ifstat. The system still has half of CPU cycles idle and "if_inc_counter" has surprisingly high counters: PMC: [INSTR_EXECUTED] Samples: 5181 (100.0%) , 447 unresolved %SAMP IMAGE FUNCTION CALLERS 9.1 kernel MipsUserIntr 7.6 kernel if_inc_counter vlan_transmit:1.8 ether_nh_input:1.1 arge_tx_locked:0.6 if_transmit:0.5 5.2 kernel DELAY 4.2 kernel ether_nh_input netisr_dispatch_src 4.1 kernel _bus_dmamap_load_buf _bus_dmamap_load_mbuf_sg 3.9 kernel arge_start_locked arge_start 3.4 kernel _bus_dmamap_sync arge_start_locked:1.2 arge_newbuf:0.9 arge_rx_locked:0.8 3.1 kernel memcpy 2.8 kernel critical_exit if_inc_counter 2.5 kernel critical_enter 2.0 kernel arge_newbuf arge_rx_locked 2.0 kernel bus_dmamap_sync_buf 1.8 kernel netisr_dispatch_src netisr_dispatch 1.8 kernel _bus_dmamap_load_mbu bus_dmamap_load_mbuf_sg 1.7 kernel vlan_transmit 1.6 kernel bus_dmamap_load_mbuf arge_newbuf:1.0 arge_start_locked:0.6 1.5 kernel arge_rx_locked arge_intr 1.5 kernel mipsNN_pdcache_inv_r 1.5 kernel generic_bs_barrier 1.5 kernel _bus_dmamap_unload arge_tx_locked:0.8 arge_newbuf:0.7 1.5 kernel arge_tx_locked arge_intr 1.4 kernel bzero 1.4 kernel mb_ctor_pack uma_zalloc_arg 1.4 libc.so.7 bsearch pmcstat_symbol_search 1.4 kernel if_transmit vlan_transmit 1.3 kernel memcmp 1.2 libpmc.so. pmclog_read pmcstat_process_log 1.2 kernel vlan_input ether_demux 1.2 kernel mipsNN_pdcache_wb_ra 1.2 kernel arge_start if_start 1.2 kernel m_adj arge_newbuf 1.1 kernel _rm_rlock vlan_input 1.0 kernel uma_zalloc_arg arge_newbuf 0.9 kernel trap MipsUserGenException 0.9 kernel ar934x_chip_ddr_flus arge_flush_ddr 0.9 kernel _bus_dmamap_addseg 0.8 kernel uma_zfree_arg mb_free_ext 0.8 kernel m_freem arge_tx_locked CONVERSION STATISTICS:unlock vlan_input #samples/total 179577 #samples/unknown-function 5253 #callchain/dubious-frames 17747