Created attachment 125811 [details]<=
/span>
dmesg
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Ellesmere [Polaris10] (rev c7)
Tried on vanilla Linux 4.7 and 4.8-rc2 with the async pageflip commit rever=
ted.
I'm testing with a very simple directx9 application (without nine) because =
the
impact is extremely obvious with wine:
http://www.codesampler.com/dx9src/dx9src_1.htm#dx9_initialization
Before suspending it runs with 5000+ FPS, after suspending it runs with <=
;1000.
Also, if you keep the mouse pointer over the window moving, it will have a =
very
small performance drop before suspending and a huuuge performance drop after
suspending.
I looked at the powerplay values in sysfs while that application is running=
in
wine and before suspend,
pcie is
0: 2.5GB, x8=20
1: 8.0GB, x16 *
and sclk is
0: 300Mhz=20
1: 608Mhz=20
2: 910Mhz=20
3: 1077Mhz=20
4: 1145Mhz=20
5: 1191Mhz=20
6: 1236Mhz=20
7: 1288Mhz *
after suspend it's
pcie
0: 2.5GB, x8 *
1: 8.0GB, x16=20
and sclk
0: 300Mhz=20
1: 608Mhz *
2: 910Mhz=20
3: 1077Mhz=20
4: 1145Mhz=20
5: 1191Mhz=20
6: 1236Mhz=20
7: 1288Mhz=20
mclk is
0: 300Mhz=20
1: 2000Mhz *
in both cases.
I then tried
echo high > /sys/class/drm/card0/device/power_dpm_force_performance_level
and the sclk clock goes to max and pcie goes to 16x again, but the performa=
nce
of the application does NOT increase so it looks like the low clocks are a
symptom of whatever causes low performance.
dmesg from 4.8-rc2 attached, shows some errors:
[ 574.369317]=20
failed to send message 5e ret is 0=20
[ 574.369317] [drm:amdgpu_vce_ring_test_ring [amdgpu]] *ERROR* amdgpu: rin=
g 12
test failed
[ 574.369317] [drm:amdgpu_resume [amdgpu]] *ERROR* resume of IP block
<vce_v3_0> failed -110
[ 574.369317] [drm:amdgpu_resume_kms [amdgpu]] *ERROR* amdgpu_resume failed
(-110).