Date: Thu, 8 Mar 2012 15:23:46 -0800 From: YongHyeon PYUN <pyunyh@gmail.com> To: Eugene Grosbein <egrosbein@rdtc.ru> Cc: marius@freebsd.org, yongari@freebsd.org, "net@freebsd.org" <net@freebsd.org> Subject: Re: suboptimal bge(4) BCM5704 performance in RELENG_8 Message-ID: <20120308232346.GA15604@michelle.cdnetworks.com> In-Reply-To: <4F584896.5010807@rdtc.ru> References: <4F5608EA.6080705@rdtc.ru> <20120307202914.GB9436@michelle.cdnetworks.com> <4F571870.3090902@rdtc.ru> <20120308034345.GD9436@michelle.cdnetworks.com> <4F578FE1.1000808@rdtc.ru> <20120308190628.GB13138@michelle.cdnetworks.com> <4F584896.5010807@rdtc.ru>
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On Thu, Mar 08, 2012 at 12:50:14PM +0700, Eugene Grosbein wrote: > 09.03.2012 02:06, YongHyeon PYUN пишет: > > On Wed, Mar 07, 2012 at 11:42:09PM +0700, Eugene Grosbein wrote: > >> 08.03.2012 10:43, YongHyeon PYUN пишет: > >> > >>>>> Show me the output of "sysctl dev.bge.0.stats". > >>>> > >>>> # sysctl dev.bge.0.stats > >>>> dev.bge.0.stats.FramesDroppedDueToFilters: 0 > >>>> dev.bge.0.stats.DmaWriteQueueFull: 84072 > >>>> dev.bge.0.stats.DmaWriteHighPriQueueFull: 0 > >>>> dev.bge.0.stats.NoMoreRxBDs: 0 > >>>> dev.bge.0.stats.InputDiscards: 0 > >>>> dev.bge.0.stats.InputErrors: 30 > >>>> dev.bge.0.stats.RecvThresholdHit: 745400662 > >>>> dev.bge.0.stats.DmaReadQueueFull: 2020586592 > >>>> dev.bge.0.stats.DmaReadHighPriQueueFull: 0 > >>>> dev.bge.0.stats.SendDataCompQueueFull: 0 > >>>> dev.bge.0.stats.RingSetSendProdIndex: 2832885493 > >>>> dev.bge.0.stats.RingStatusUpdate: 899990835 > >>>> dev.bge.0.stats.Interrupts: 899990835 > >>>> dev.bge.0.stats.AvoidedInterrupts: 0 > >>>> dev.bge.0.stats.SendThresholdHit: 0 > >>>> dev.bge.0.stats.rx.ifHCInOctets: 491268800 > >>>> dev.bge.0.stats.rx.Fragments: 234 > >>>> dev.bge.0.stats.rx.UnicastPkts: 1977202324 > >>>> dev.bge.0.stats.rx.MulticastPkts: 0 > >>>> dev.bge.0.stats.rx.FCSErrors: 341 > >>> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > >>> You have multiple FCS and Input errors. Check signal > >>> quality(i.e. UTP cable). > > Btw, I still think these errors are pretty seldom and cannot explain > why I can't get full output gigabit speed. And what do these Right. > DmaWriteQueueFull/DmaReadQueueFull mean? Will it help to increase State machine in controller will add DMA descriptors to DMA engine whenever controller send/receive frames. These numbers indicate how many times the state machine sees DMA write/read queue full. And the state machine will have to retry the operation once it see a queue full. > interface FIFO queue to eliminate output drops? > These queues reside in internal RISC processors and I don't think there is an interface that changes the queue length. It's not normal FIFO which is used to send/receive a frame. I don't see any abnormal DMA configuration for PCI-X 5704 so I'm still interested in knowing netperf benchmark result. > Eugene Grosbein
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