Subject: Re: pciide performance on alpha
To: Ross Harvey <>
From: Michael T. Stolarchuk <>
List: port-alpha
Date: 08/12/1999 15:14:06
In message <>, Ross Harvey writes:
>> From: Jason Thorpe <>
>> On Thu, 12 Aug 1999 20:46:53 +0200 
>>  Manuel Bouyer <> wrote:
>>  > The problem here is that he is getting the same bad performances with a
>>  > Promise Ultra/33, where the same board with the same driver in a PC flies ...
>>  > Maybe there's a problem at a upper level (mainbus/pci bridge) ?
>>  > A lot of parameter seems uninitialised as well in the standart PCI header
>>  > (latency being one).
>> I think I remember someone else mentioning that the PCI Latency Timer wasn't
>> initialized properly by the firmware on some PC164 models...
>I have wondered recently if the 100BaseT problems at might be due
>to either a generic PCI config space botch by SRM or due to a tulip- specific
>config botch. (I suspect it would be Bad if eitehr CSR0:<PBL>, Programmable
>Burst Length or <CAL>, Cache Alignment were botched by the FW.)

It could be, but we at also tried fxp cards, and had
the *same* problems.  It would then be true only if the fxp
also played with the same parameters.