https://bugs.freedesktop.org/show_bug.cgi?id=34377
Summary: Radeon driver PCIe throughput not up to PCIe2.0 levels
Product: Mesa
Version: git
Platform: x86 (IA32)
OS/Version: Linux (All)
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/DRI/R600
AssignedTo: dri-devel at lists.freedesktop.org
ReportedBy: lucvermoesen at gmail.com
Created an attachment (id=43476)
--> (https://bugs.freedesktop.org/attachment.cgi?id=43476)
test data and test program for PCIe gen2 issue
On an HD5450 card, when I load the latest gallium3D driver with kernel
2.6.38-rc4 and firmware I got from
http://people.freedesktop.org/~agd5f/radeon_ucode/ , this together with the
latest git checkouts for X and modules (and thus also xf86-video-ati) and
latest mesa git checkout that has been built with ?enable-gallium-r600
installing the radeon kernel module with
modprobe radeon modeset=1 pcie_gen2=1
Then I get 0.5GB/s CPU->GPU
