On 08.08.2014 21:48, Thomas Schwinge wrote: > > I recetly repurposed a BlueMedia OPTIMA II system, Biostar MCP6P M2+ > mainboard, AMD Athlon II X2 215 with 2700 MHz, 8 GiB RAM, Xen setup, for > use as a desktop machine (the Xen dom0, specifically). I put in a > Sapphire Radeon HD 4350 card where I'm connecting the DVI output to a > portrait-oriented (1200x1920) and the VGA output to a landscape-oriented > (1440x900) monitor. I'm running Debian GNU/Linux testing with the > Cinnamon desktop environment (Gnome Shell derivate of Gnome 2). This is > being used as a development and all-purpose system, that is, several > virtual desktops, with mostly full-screen terminal/Emacs/web browser > processes running. This is working nicely. > > However, what happens after (irregularely) several hours of usage is that > any interactions involving the desktop get executed very sluggishly > (initially about 1 s of delay, later getting worse), which makes this > unworkable. Once this happens, I see the following in dmesg, repeating > every once in a while: > > [96450.514927] [TTM] Failed to find memory space for buffer 0xffff88015daef048 eviction > [96450.514934] [TTM] No space for ffff88015daef048 (65536 pages, 262144K, 256M) > [96450.514936] [TTM] placement[0]=0x00410002 (1) > [96450.514938] [TTM] has_type: 1 > [96450.514939] [TTM] use_type: 1 > [96450.514940] [TTM] flags: 0x0000000A > [96450.514941] [TTM] gpu_offset: 0x20000000 > [96450.514942] [TTM] size: 262144 > [96450.514943] [TTM] available_caching: 0x00070000 > [96450.514944] [TTM] default_caching: 0x00010000 > [96450.514947] [TTM] 0x00000000-0x00000001: 1: used > [96450.514949] [TTM] 0x00000001-0x00000011: 16: used > [96450.514951] [TTM] 0x00000011-0x00000111: 256: used > [96450.514952] [TTM] 0x00000111-0x00000121: 16: used > [96450.514953] [TTM] 0x00000121-0x00000122: 1: used > [96450.514955] [TTM] 0x00000122-0x00000222: 256: used > [96450.514956] [TTM] 0x00000222-0x0000030f: 237: free > [96450.514957] [TTM] 0x0000030f-0x00000313: 4: used > [96450.514958] [TTM] 0x00000313-0x000061c0: 24237: free > [96450.514960] [TTM] 0x000061c0-0x000161c0: 65536: used > [96450.514961] [TTM] 0x000161c0-0x000242fe: 57662: free > [96450.514962] [TTM] 0x000242fe-0x000342fe: 65536: used > [96450.514963] [TTM] 0x000342fe-0x0003d80c: 38158: free > [96450.514965] [TTM] 0x0003d80c-0x0003d90c: 256: used > [96450.514966] [TTM] 0x0003d90c-0x0003ff94: 9864: free > [96450.514967] [TTM] 0x0003ff94-0x0003ffa4: 16: used > [96450.514969] [TTM] 0x0003ffa4-0x00040000: 92: free > [96450.514970] [TTM] total: 262144, used 131894 free 130250 Looks like it's failing to evict a buffer object (BO) of size 256MB, presumably from VRAM. AFAICT there's only 256MB of GTT available, is this an AGP card? If so, does radeon.agpmode=-1 on the kernel command line help? If not, increasing the GTT size further using radeon.gartsize=1024 or even larger powers of two might help. Though I wonder if one of the apps you're running really needs a BO of size 256MB, or maybe just thinks it's a good idea to use a texture of the maximum size supported by OpenGL... -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
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