[Bug 85021] New: radeon: Allow one to set "mid" to power_dpm_force_performance_level

[Bug 85021] New: radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

            Bug ID: 85021
           Summary: radeon: Allow one to set "mid" to
                    power_dpm_force_performance_level
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.16.2
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: higuita@gmx.net
        Regression: No

On a radeon module with dpm enable, one can set the
power_dpm_force_performance_level to auto, low and high. All fine, but my card
have a mid performance setup and is very useful, as the low is too slow when i
have some contant graphic usage (usually tvtime running), but auto and high are
too fast and hot for that usage, wasting energy and overheating the system
without need.

If i could setup the mid profile, the performance would be good, but not the
card maximum.

So the current setup is good for "little"/"a lot" GPU usage, but is missing the
mid support for those "moderate" GPU usage where the low is too litle and the
high is too much.

[    9.411247] switching to power state:
[    9.411343]     ui class: performance
[    9.411480]     internal class: ovrdrv 
[    9.411664]     caps: video 
[    9.411848]     uvd    vclk: 0 dclk: 0
[    9.411943]         power level 0    sclk: 15000 mclk: 42000 vddc: 1000
[    9.412047]         power level 1    sclk: 30000 mclk: 60000 vddc: 1080
[    9.412144]         power level 2    sclk: 80000 mclk: 70000 vddc: 1160
[    9.412241]     status: r

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Why not just use auto?  The hw will switch between the performance levels
automatically on demand.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

--- Comment #2 from higuita <higuita@gmx.net> ---
Auto will jump from level 0 to level 2, i never see level 1 being used in any
place/app other than a maximized glxgears.

tvtime or chrome+youtube+thml5 will jump the level from 0 to 2, but if i force
low i see no problem at all, no drop frames, no lag. Only if i try to open more
things at same time (many terminals doing dmesg, many videos playing, some 3d
game) it starts to get slower. 
so clearly the high is too much, low is enough for most use cases and mid would
be perfect.  Auto will not put it in mid.

That is why i wanted to manually setup the mid level, the computer keeps cool
and the gpu power is good enough for almost all load (other than heavy 3D
games)

also, its a little strange that low and high is supported in dpm setting, but
not the mid... profile setting had the low, mid, high and the auto

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

Alexandre Demers <alexandre.f.demers@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexandre.f.demers@gmail.co
                   |                            |m

--- Comment #3 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
By curiousity, how do you monitor the level your GPU is using. And what GPU are
you using?

I'll share a small script I'm using to loop through information about my GPU
(Cayman) where I can clearly all three levels being used. Maybe you could try
it and see if you can catch a mid level being used.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

--- Comment #4 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
Created attachment 151651
  --> https://bugzilla.kernel.org/attachment.cgi?id=151651&action=edit
Script showing some information on the gpu

you will have to run this script using "sudo" or somthing similar. It shows all
information on sensors and the current level the GPU is using. If you can some
errors using it, don't worry, you maybe missing a tool or two (about sensors),
but you'll be able to track your gpu's power level.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

--- Comment #5 from higuita <higuita@gmx.net> ---
The gpu is one old ATI HD2600XP AGP:

01:00.0 VGA compatible controller: AMD/ATI [Advanced Micro Devices, Inc.] RV630
XT [Radeon HD 2600 XT AGP]

I usually use this command to see what level the gpu is:

cat /sys/kernel/debug/dri/64/radeon_pm_info

I run your script and got the same result. Using auto i get the low level on
normal desktop use, high on tvtime, youtube and 3D games, mid i can only get if
i do a maximized glxgears or a "while true; do dmesg; sleep .3; done"... and on
this last one, after a few seconds, it jumps to high. Also, stopping the
applications and wait a few seconds, the GPU will downgrade from level 2, to
level 1 for 1 second, then level 0

here one example to the leve downgrade:

balanced
uvd    vclk: 0 dclk: 0
power level 1    sclk: 30000 mclk: 60000 vddc: 1080
53000
balanced
auto
uvd    vclk: 0 dclk: 0
power level 1    sclk: 30000 mclk: 60000 vddc: 1080
k8temp-pci-00c3
Adapter: PCI adapter
temp-Core0:   +30.0°C  
temp-Core1:   +34.0°C  

radeon-pci-0100
Adapter: PCI adapter
temp-GPU:     +52.0°C  (crit = +120.0°C, hyst = +90.0°C)

w83627thf-isa-0290
Adapter: ISA adapter
in0:          +1.34 V  (min =  +1.10 V, max =  +1.55 V)
in1:          +2.99 V  (min =  +2.85 V, max =  +3.15 V)
in2:          +3.33 V  (min =  +3.14 V, max =  +3.47 V)
+5V:          +4.96 V  (min =  +4.51 V, max =  +5.49 V)
in4:          +4.08 V  (min =  +4.08 V, max =  +4.08 V)
5VSB:         +5.04 V  (min =  +4.51 V, max =  +5.49 V)
Vbat:         +3.30 V  (min =  +2.40 V, max =  +3.60 V)
fan-CPU:     1360 RPM  (min =  998 RPM, div = 8)
fan-Power:    774 RPM  (min =  664 RPM, div = 8)
fan-Case:    1298 RPM  (min =  799 RPM, div = 8)
temp-M/B:     +27.0°C  (high = +40.0°C, hyst = +37.0°C)  sensor = thermistor
temp-CPU:     +36.5°C  (high = +53.0°C, hyst = +50.0°C)  sensor = thermistor
temp-Case:    +30.7°C  (high = +37.1°C, hyst = +36.0°C)  sensor = thermistor
cpu0_vid:    +1.475 V
beep_enable: enabled

balanced
uvd    vclk: 0 dclk: 0
power level 0    sclk: 15000 mclk: 42000 vddc: 1000
52000
balanced
auto
uvd    vclk: 0 dclk: 0
power level 0    sclk: 15000 mclk: 42000 vddc: 1000
k8temp-pci-00c3
Adapter: PCI adapter
temp-Core0:   +30.0°C  
temp-Core1:   +33.0°C

By the way, on 3D games, the GPU can reach 80-84ºC, but with tvtime it only
goes to 60-65ºC (both on level 2)

-- 
You are receiving this mail because:
You are watching the assignee of the bug.
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

--- Comment #6 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to higuita from comment #2)
> Auto will jump from level 0 to level 2, i never see level 1 being used in
> any place/app other than a maximized glxgears.
> 
> tvtime or chrome+youtube+thml5 will jump the level from 0 to 2, but if i
> force low i see no problem at all, no drop frames, no lag. Only if i try to
> open more things at same time (many terminals doing dmesg, many videos
> playing, some 3d game) it starts to get slower. 
> so clearly the high is too much, low is enough for most use cases and mid
> would be perfect.  Auto will not put it in mid.
> 

It's all based on GPU load.  The hw steps through the performance levels based
on demand.

> That is why i wanted to manually setup the mid level, the computer keeps
> cool and the gpu power is good enough for almost all load (other than heavy
> 3D games)
> 
> also, its a little strange that low and high is supported in dpm setting,
> but not the mid... profile setting had the low, mid, high and the auto

The problem is twofold:

1. Most asics do not provide an easy way to lock the performance level to just
the mid state.

2. Only relatively old asics support a real mid performance level.  The last
few generations only support low and high limits and the hw changes through a
large number of dynamically generated states in between.

The only way to do that would be to dynamically generate a new state with mid
being the high state (e.g., low mid mid, or low mid, etc. depending on the
asic) and then switch to that state and lock it into the "high" performance
level of that state.  Unforunately, a full state change is a relatively heavy
operation compared to just locking the performane level of an already loaded
state.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

[Bug 85021] radeon: Allow one to set "mid" to power_dpm_force_performance_level

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=85021

--- Comment #7 from higuita <higuita@gmx.net> ---
Ok, so if "mid" would work for old cards and is not easy to implement, probably
is not worth the trouble as most people don't manually set the power level.

i will try to solve my problem another way or maybe finally get a new computer
:)

If you also agree, this can be closed

thanks!

-- 
You are receiving this mail because:
You are watching the assignee of the bug.