https://bugs.freedesktop.org/show_bug.cgi?id=82050
--- Comment #33 from Michel Dänzer michel@daenzer.net --- (In reply to comment #28)
I submitted the change reverting the behaviour of PIPE_USAGE_STREAM for review, but it's strange: I couldn't notice any significant difference in stutter in Valley regardless of any of these changes.
Also, according to GALLIUM_HUD=requested-VRAM+VRAM-usage,requested-GTT+GTT-usage, Valley only seems to allocate about 10-20 MB for streaming BOs, so I'm not sure why putting them in VRAM or not makes such a big difference for you.
BTW, what CPU are you using?
It's an AMD Phenom II x4 965be.
I assume the chipset for that doesn't support PCIe 3.0, does it? I wonder if maybe streaming BOs should be in VRAM with PCIe 3.0 but not with PCIe 2.0.