suboptimal bge(4) BCM5704 performance in RELENG_8

[Eugene Grosbein]

09.03.2012 02:06, 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).
>>
>> OTOH, should not bge(4) for such errors increase "Ierrs" counters
>> that shows netstat -i?
>>
> 
> You're right.  I checked the code and noticed that old
> controllers(BCM570[0-4]) do not report these errors.
> Would you try attached patch and let me know whether it corrects
> statistics counter?  The patch also will show more information like
> whether the controller runs in PCI mode or not as well as showing
> frequency of PCI clock speed.

I've applied the patch. Now dmesg shows:

bge0: <HP NC7782 Gigabit Server Adapter, ASIC rev. 0x002100> mem 0xfdf70000-0xfdf7ffff irq 25 at device 2.0 on pci2
bge0: CHIP ID 0x00002100; ASIC REV 0x02; CHIP REV 0x21; PCI-X 66 MHz

I'll watch on Ierrs counter.

Eugene Grosbein