09-23-2010 03:20 AM - edited 09-23-2010 03:43 AM
I use the Windows API functions (WRITE_REGISTER_BUFFER_ULONG，READ_REGISTER_BUFFER_
32bit Windows XP SP2
V5 110T -1
09-24-2010 04:55 AM
The link below might be helpful to figure out what might be affecting the performance:
03-09-2011 01:17 AM
I would sugest that you have to set Acceptable L0 Latency to less than <64ns when you generate the core. For V5 it is set to unlimited by default. It looks like this allows the Root complex to relax the timming between write TLPs. (adds 400 ns between write (posted) packets).