请问radeon dpm动态电源管理输出的含义

[vickycq]

# cat /sys/kernel/debug/dri/0/radeon_pm_info

代码： 全选

uvd    vclk: 0 dclk: 0
power level 0    sclk: 27500 vddc: 863

系统空闲时和播放高清视频时的输出一样，只会偶尔跳到power level 7。

只搜到一篇，但讲的不太详细：http://www.botchco.com/agd5f/?p=57

请问上面输出各项的含义？

[vickycq]

有人回答了
http://askubuntu.com/questions/569085/r ... -and-vddci

VCLK and DCLK are two UVD internal clocks.
SCLK is the Engine clock and MCLK is the Memory clock, both depend on the current power level.
VDDC (mV) is the GPU core voltage
VDDCI (mV) is the I/O bus voltage (between memory and GPU core) and comes from the PCI-Express slot.
Note: clock units seem to be kHz * 10 (Source)

Sources:
http://lxr.free-electrons.com/source/dr ... os.c#L1228
http://vr-zone.com/articles/amd-radeon- ... 10211.html
http://www.geeks3d.com/20101107/radeon- ... -and-mvdd/