[Bug 84662] Long pauses with Unreal demo Elemental on R9270X since : Always flush the HDP cache before submitting a CS to the GPU

https://bugs.freedesktop.org/show_bug.cgi?id=84662

--- Comment #5 from smoki smoki00790@gmail.com --- (In reply to Andy Furniss from comment #3)

Created attachment 107327 [details] gallium hud on bad showing different vram gtt usage

Hmm whatever GTT starts fueling fps gows down to crawl... I can't run Elemental on Kabini have just 1-3 fps :D , but i am curios what happens for you in HUD when you just comment out this in r600_buffer_common.c:

default: /* Not listing GTT here improves performance in some apps. */ res->domains = RADEON_DOMAIN_VRAM; // flags |= RADEON_FLAG_GTT_WC; break; }