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Date: Thu, 08 Mar 2012 12:50:14 +0700
From: Eugene Grosbein <egrosbein@rdtc.ru>
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Cc: marius@freebsd.org, yongari@freebsd.org,
	"net@freebsd.org" <net@freebsd.org>
Subject: Re: suboptimal bge(4) BCM5704 performance in RELENG_8
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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
DmaWriteQueueFull/DmaReadQueueFull mean? Will it help to increase
interface FIFO queue to eliminate output drops?

Eugene Grosbein