[vortex] RX overrun with 3COM 3c982

[Claude Pignol]

Donald Becker wrote:

>On Tue, 19 Nov 2002, Claude Pignol wrote:
>  
>
>>Donald Becker wrote:
>>    
>>
>>>On Mon, 18 Nov 2002, Claude Pignol wrote:
>>>      
>>>
>
>  
>
>>>>>>>Hmmm, this might be doing long PCI bursts, not leaving enough for the
>>>>>>>Ethernet.  If that's the case, the solution is to:
>>>>>>>Change the Min-grant / Max-Latency PCI settings
>>>>>>>              
>>>>>>>
>
>What are the settings.  This is really starting to look like a
>bug-hogging issue, or the 3Ware card sometimes holding the bus as a
>slave-target.
>
>  
>
>>>>>>>Set the PCI bursts to much longer values, although the '982 has
>>>>>>>  reasonable defaults.  The registers to change are the
>>>>>>>  UpBurstThreshold at offset 0x3e and
>>>>>>>  UpPriorityThreshold, offset 0x3c, default 4*32 = 128 bytes.
>>>>>>>              
>>>>>>>
>>>OK, more work, and an updated vortex-diag just for this:
>>> ftp://ftp.scyld.com/pub/diag/vortex-diag.c
>>>
>>>Try setting
>>> -G 512
>>>      
>>>
>..
>  
>
>>I try the new vortex-diag:
>>Registers berfore -G512
>>    
>>
>
>Could you show this with '-g'?
>I know that I should make that the default for the Cyclone.
>  
>

vortex-diag.c:v2.11 11/19/2002 Donald Becker (becker@scyld.com)
http://www.scyld.com/diag/index.html
Index #1: Found a 3c982 Dual Port server NIC adapter at 0x2400.
DMA control register is 00000028.
Tx list starts at 3775da90.
Tx FIFO thresholds: min. burst 256 bytes, priority with 128 bytes to empty.
Rx FIFO thresholds: min. burst 256 bytes, priority with 512 bytes to full.
Poll period Tx 6400 ns., Rx 0 ns.
Maximum burst recorded Tx 0, Rx 352.

CP.

>  
>
>>0x2410: **FIFO** 00000000 0000000f *STATUS*
>>0x2420: 00000020 3775daf0 00080000 00001404
>>0x2430: 00000000 0608f9f8 3775d8b0 00080004
>>    
>>
>
>Priority 128..
>
>  
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>>Registers after the RX priority to 512 bytes
>>0x2430: 00000000 c3123cee 3775d990 00080010
>>    
>>
>
>Good, priority at 512 bytes.
>
>  
>
>>Error ratio: ( 127616 -123204)/(534880121-468076386)=.000066
>>For the same period an interface with the default value has a ratio .00018
>>It seems that it goes in the right direction (there is no interface with 
>>a ratio < .00012 with the default value).
>>    
>>
>
>This really points to the 3Ware.
>
>Try -G 1024...
>
>  
>
OK
-- 
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Claude Pignol SeismicCity, Inc. <http://www.seismiccity.com>
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