On Tue, Dec 9, 2014 at 4:39 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: > On Tue, Dec 9, 2014 at 8:06 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: >> On Tue, Dec 9, 2014 at 1:18 AM, Michel Dänzer <michel@xxxxxxxxxxx> wrote: >>> On 09.12.2014 09:24, Andy Lutomirski wrote: >>>> >>>> The relevant line from latencytop seems to be: >>>> >>>> 154 20441402 489139 radeon_fence_default_wait [radeon] >>>> fence_wait_timeout ttm_bo_wait [ttm] ttm_bo_move_accel_cleanup [ttm] >>>> radeon_move_blit.isra.12 [radeon] radeon_bo_move [radeon] >>>> ttm_bo_handle_move_mem [ttm] ttm_bo_evict [ttm] ttm_mem_evict_first >>>> [ttm] ttm_bo_mem_space [ttm] ttm_bo_validate [ttm] >>>> radeon_bo_fault_reserve_notify [radeon] >>> >>> Which process is this? >> >> Xorg >> >>> >>> Looks like CPU access to a BO in VRAM, but the BO is located outside of >>> the CPU visible area of VRAM, so it has to be moved into the CPU visible >>> area first. >>> >>> Which version of Mesa are you using? >>> >> >> mesa-dri-drivers-10.3.3-1.20141110.fc20.x86_64 >> >> I'm planning on upgrading to Fedora 21 fairly soon. > > Upgrading to mesa-dri-drivers-10.3.3-1.20141110.fc21.x86_64 seems to > have helped enough that my usual test (open a couple of Firefox tabs > with graphics in them) doesn't hang anymore. > > This card still isn't *fast*. Is there some way I can check that I'm > actually using all 16 PCIe lanes? In my tinkering w/ power management > settings, I got some odd logs suggesting that only one lane was in > use. > You should be using all the lanes available. The main issue with that card is vram memory bandwidth. Those chips have a single channel memory interface and most OEMs populate them with DDR3 memory rather than GDDR5. from your log: [ 3.079577] [drm] RAM width 64bits DDR ... [ 3.082589] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0 Alex _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
