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williewillus

Member

Registered: 2011-03-27

Posts: 27

ATI Radeon Performance Inconsistency

I've installed the necessary drivers for my system, which is a dual-graphic intel i915/Radeon 5600. I've also enabled vga_switcheroo to toggle power to either card. There is an interesting twist though. Whenever I switch to the Radeon 5600 and startx, performance is much slower than the intel card (Most noticeably in 3D applications and gnome-shell animations). This problem does not appear on another system that has a single Radeon with the same (opensource) driver. Intel Graphics are fine for most occasions, but sometimes some hardcore games like scorched3d require a little more.
I suspect it has to do with that second line about MTRR allocation. I haven't dabbled in that area much but I think it has something to do with my Video RAM.
Thanks
Info:
xorg.conf: empty
kernel output upon loading "radeon" module in order to access vga_switcheroo:

[    6.420837] [drm] Initialized drm 1.1.0 20060810
[    6.568013] [drm] MTRR allocation failed.  Graphics performance may suffer.
[    6.568776] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    6.568869] [drm] Driver supports precise vblank timestamp query.
[    6.712209] fbcon: inteldrmfb (fb0) is primary device
[    6.879783] fb0: inteldrmfb frame buffer device
[    6.879802] drm: registered panic notifier
[    6.897627] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
[   33.802713] [drm] radeon defaulting to kernel modesetting.
[   33.802773] [drm] radeon kernel modesetting enabled.
[   33.802961] radeon 0000:01:00.0: power state changed by ACPI to D0
[   33.803017] radeon 0000:01:00.0: power state changed by ACPI to D0
[   33.803075] radeon 0000:01:00.0: enabling device (0000 -> 0003)
[   33.803132] radeon 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[   33.803194] radeon 0000:01:00.0: setting latency timer to 64
[   33.803460] [drm] initializing kernel modesetting (REDWOOD 0x1002:0x68C1).
[   33.803660] [drm] register mmio base: 0xC4400000
[   33.803689] [drm] register mmio size: 131072
[   33.803829] radeon atpx: version is 1
[   37.955778] radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
[   37.955840] radeon 0000:01:00.0: GTT: 512M 0x0000000040000000 - 0x000000005FFFFFFF
[   37.955930] [drm] Detected VRAM RAM=1024M, BAR=256M
[   37.955965] [drm] RAM width 128bits DDR
[   37.956311] [drm] radeon: 1024M of VRAM memory ready
[   37.956350] [drm] radeon: 512M of GTT memory ready.
[   37.956403] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[   37.956449] [drm] Driver supports precise vblank timestamp query.
[   37.956532] radeon 0000:01:00.0: irq 47 for MSI/MSI-X
[   37.956539] radeon 0000:01:00.0: radeon: using MSI.
[   37.956626] [drm] radeon: irq initialized.
[   37.956662] [drm] GART: num cpu pages 131072, num gpu pages 131072
[   37.957491] [drm] Loading REDWOOD Microcode
[   38.014064] radeon 0000:01:00.0: WB enabled
[   38.030704] [drm] ring test succeeded in 2 usecs
[   38.030818] [drm] radeon: ib pool ready.
[   38.030973] [drm] ib test succeeded in 0 usecs
[   38.032014] [drm] Radeon Display Connectors
[   38.032046] [drm] Connector 0:
[   38.033257] [drm]   LVDS
[   38.034332] [drm]   DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c
[   38.035501] [drm]   Encoders:
[   38.036616] [drm]     LCD1: INTERNAL_UNIPHY
[   38.037670] [drm] Connector 1:
[   38.038709] [drm]   HDMI-A
[   38.039728] [drm]   HPD1
[   38.040731] [drm]   DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
[   38.041773] [drm]   Encoders:
[   38.042832] [drm]     DFP1: INTERNAL_UNIPHY1
[   38.043884] [drm] Connector 2:
[   38.044934] [drm]   VGA
[   38.046016] [drm]   DDC: 0x64d8 0x64d8 0x64dc 0x64dc 0x64e0 0x64e0 0x64e4 0x64e4
[   38.047113] [drm]   Encoders:
[   38.048223] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
[   38.858211] [drm] Internal thermal controller without fan control
[   38.859395] [drm] radeon: power management initialized
[   39.749365] [drm] fb mappable at 0xA0141000
[   39.750523] [drm] vram apper at 0xA0000000
[   39.751681] [drm] size 5787648
[   39.752849] [drm] fb depth is 24
[   39.753997] [drm]    pitch is 6400
[   39.755234] fb1: radeondrmfb frame buffer device
[   39.756428] [drm] Initialized radeon 2.9.0 20080528 for 0000:01:00.0 on minor 1
[  165.063673] radeon: switched off
[  165.162745] radeon 0000:01:00.0: power state changed by ACPI to D3

williewillus

Member

Registered: 2011-03-27

Posts: 27

Re: ATI Radeon Performance Inconsistency

bump?