Subject: Re: PCI caching question related to mvme5500
On Nov 1, 2005, at 7:38 AM, Kate Feng wrote:
Much later when porting to vxWorks and again having it slow I
realized that the board does not properly say that its memory is pre-
fetchable.
Who was slow ? RTEMS or vxWorks ?
Both were. I didn't have the PCI background to realize something was
fishy when bringing up RTEMS - when the board doesn't claim to be pre-
fetchable there isn't a reason to cache it. Only when vxWorks was
also slow did I get suspicious and looked into it further.
I'm hoping someone who knows the RTEMS PCI will tell me where to
properly hack in obtaining a cached address for a board broken in
such a manner. I have to get a new system up and running, this time
with Solaris-10 on an Opteron, and I want to be sure to get any
changes into the RTEMS bug data base. I won't have much time to
spend until things are up and running, so I'm turning to the list to
see if I can improve what I did before and get something into the
database.