[Bug 29842] New: Radeon runs very hot

[Bug 29842] New: Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842

           Summary: Radeon runs very hot
           Product: Drivers
           Version: 2.5
    Kernel Version: 2.6.38-rc6
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
        AssignedTo: drivers_video-dri@kernel-bugs.osdl.org
        ReportedBy: psusi@cfl.rr.com
        Regression: No


The newer kernels read the temperature of my Radeon card, and report that it is
running at around 80 C on an idle desktop.  For comparison, my CPU is only 34
C.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842





--- Comment #1 from Phillip Susi <psusi@cfl.rr.com>  2011-02-25 14:54:00 ---
To make sure something in the desktop wasn't causing it, I booted the kernel
with init=/bin/bash and the temperature still rose to 83 C.  My guess is this
is a defect in the firmware, or the driver interface to it, and it is running
in an infinite loop instead of going idle.

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Re: [Bug 29842] Radeon runs very hot

[Phillip Susi]

So I have been looking over the source code in drivers/gpu/drm/radeon.
I see various functions to start/stop/resume/initialize "mc" and "cp".
I assume those stand for microcode and control program?  What exactly is
the difference?

It seems like the GPU is executing a few different microcode kernels
that process commands placed into ring buffers.  When the ring buffers
are empty and the gui is idle, it seems like the GPU is still busily
executing an infinite loop checking for work in the ring buffers.
Shouldn't the driver detect the idle condition and issue an
r600_cp_stop() to halt execution and stop wasting power?

Re: [Bug 29842] Radeon runs very hot

[Matt Turner]

On Fri, Feb 25, 2011 at 5:11 PM, Phillip Susi <psusi@cfl.rr.com> wrote:
> So I have been looking over the source code in drivers/gpu/drm/radeon.
> I see various functions to start/stop/resume/initialize "mc" and "cp".
> I assume those stand for microcode and control program?  What exactly is
> the difference?

Memory Controller and Command Processor, I believe.

Matt

Re: [Bug 29842] Radeon runs very hot

[Michel Dänzer]

On Fre, 2011-02-25 at 12:11 -0500, Phillip Susi wrote: 
> 
> It seems like the GPU is executing a few different microcode kernels
> that process commands placed into ring buffers.  When the ring buffers
> are empty and the gui is idle, it seems like the GPU is still busily
> executing an infinite loop checking for work in the ring buffers.

As has been pointed out by Alex, that's not true to the best of our
knowledge.

> Shouldn't the driver detect the idle condition and issue an
> r600_cp_stop() to halt execution and stop wasting power?

Feel free to try it, but I wouldn't expect it to make much if any
difference.


Did you check that your card runs significantly cooler in the other OS
before starting all this ruckus? (Though even if it does, the lack of
clock gating might explain the difference)


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Re: [Bug 29842] Radeon runs very hot

[Phillip Susi]

On 02/26/2011 03:09 AM, Michel Dänzer wrote:
> On Fre, 2011-02-25 at 12:11 -0500, Phillip Susi wrote:
>>
>> It seems like the GPU is executing a few different microcode kernels
>> that process commands placed into ring buffers.  When the ring buffers
>> are empty and the gui is idle, it seems like the GPU is still busily
>> executing an infinite loop checking for work in the ring buffers.
>
> As has been pointed out by Alex, that's not true to the best of our
> knowledge.

I wonder how that is though.  I see nothing in the R600 microcode 
documentation about a way to halt execution, and it explicitly says it 
does not support interrupts, so I don't see any way for the CP to avoid 
busy waiting other than to be explicitly stopped by the driver.

>> Shouldn't the driver detect the idle condition and issue an
>> r600_cp_stop() to halt execution and stop wasting power?
>
> Feel free to try it, but I wouldn't expect it to make much if any
> difference.

I tried adding a debugfs file to call it and it didn't seem to make any 
difference.

> Did you check that your card runs significantly cooler in the other OS
> before starting all this ruckus? (Though even if it does, the lack of
> clock gating might explain the difference)

I don't even have a working copy of the other OS any more.  It is on my 
old first gen WD raptor fakeraid 0 that the new system's bios and 
Windows driver won't recognize.  Now that you mention it though, I do 
think it always tended to run hot there and I usually underclocked it a 
bit to try and help.  Maybe I just have a poorly designed card with 
insufficient heatsink+fan?

It seems like clock gating, while helpful to maximize power savings, 
should not be needed to stay below critical temperatures when idle.

Strange.  This morning it seems to be running at "only" 66 C instead of 80+.
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Re: [Bug 29842] Radeon runs very hot

[Alex Deucher]

2011/2/26 Phillip Susi <psusi@cfl.rr.com>:
> On 02/26/2011 03:09 AM, Michel Dänzer wrote:
>>
>> On Fre, 2011-02-25 at 12:11 -0500, Phillip Susi wrote:
>>>
>>> It seems like the GPU is executing a few different microcode kernels
>>> that process commands placed into ring buffers.  When the ring buffers
>>> are empty and the gui is idle, it seems like the GPU is still busily
>>> executing an infinite loop checking for work in the ring buffers.
>>
>> As has been pointed out by Alex, that's not true to the best of our
>> knowledge.
>
> I wonder how that is though.  I see nothing in the R600 microcode
> documentation about a way to halt execution, and it explicitly says it does
> not support interrupts, so I don't see any way for the CP to avoid busy
> waiting other than to be explicitly stopped by the driver.

Changing the wptr is a trigger to start the cp.  When the rptr and
wptr are equal the cp is idle.  See chapter 5 of the r5xx acceleration
guide as I mentioned earlier.

>
>>> Shouldn't the driver detect the idle condition and issue an
>>> r600_cp_stop() to halt execution and stop wasting power?
>>
>> Feel free to try it, but I wouldn't expect it to make much if any
>> difference.
>
> I tried adding a debugfs file to call it and it didn't seem to make any
> difference.
>
>> Did you check that your card runs significantly cooler in the other OS
>> before starting all this ruckus? (Though even if it does, the lack of
>> clock gating might explain the difference)
>
> I don't even have a working copy of the other OS any more.  It is on my old
> first gen WD raptor fakeraid 0 that the new system's bios and Windows driver
> won't recognize.  Now that you mention it though, I do think it always
> tended to run hot there and I usually underclocked it a bit to try and help.
>  Maybe I just have a poorly designed card with insufficient heatsink+fan?

It's possible.  The default clocks are designed to be safe however
even if the temperature seems a bit high.
>
> It seems like clock gating, while helpful to maximize power savings, should
> not be needed to stay below critical temperatures when idle.
>
> Strange.  This morning it seems to be running at "only" 66 C instead of 80+.

Make sure you clean out the fan and heatsink if a lot of dust has
built up in there.

Alex

[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Andrew Morton <akpm@linux-foundation.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |akpm@linux-foundation.org
         Regression|No                          |Yes




--- Comment #2 from Andrew Morton <akpm@linux-foundation.org>  2011-03-01 00:40:31 ---
What kernel versions were OK?  2.6.37?

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Phillip Susi <psusi@cfl.rr.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|Yes                         |No




--- Comment #3 from Phillip Susi <psusi@cfl.rr.com>  2011-03-01 03:19:07 ---
It isn't a regression.  Older kernels did not report the temperature at all.  I
noticed an odd pattern today as well.  After a cold boot, the temperature runs
up to 80+, but after suspending and resuming, it remains around 66.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Andrew Morton <akpm@linux-foundation.org> changed:

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




--- Comment #4 from Andrew Morton <akpm@linux-foundation.org>  2011-03-01 03:43:47 ---
Is this the same as bug #29572?

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842





--- Comment #5 from Phillip Susi <psusi@cfl.rr.com>  2011-03-01 03:49:19 ---
No.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |florian@mickler.org,
                   |                            |maciej.rutecki@gmail.com,
                   |                            |rjw@sisk.pl
             Blocks|                            |27352
         Regression|No                          |Yes




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[Bug 29842] Radeon runs very hot

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https://bugzilla.kernel.org/show_bug.cgi?id=29842





--- Comment #6 from Alex Deucher <alexdeucher@gmail.com>  2011-03-01 21:06:17 ---
Rafael, why is this marked as a regression?  The reporter explicitly stated it
was not.

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[Bug 29842] Radeon runs very hot

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https://bugzilla.kernel.org/show_bug.cgi?id=29842


Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|florian@mickler.org,        |
                   |maciej.rutecki@gmail.com    |
             Blocks|27352                       |
         Regression|Yes                         |No




--- Comment #7 from Rafael J. Wysocki <rjw@sisk.pl>  2011-03-01 21:09:18 ---
Presumably by mistake.  Sorry.

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[Bug 29842] Radeon runs very hot

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https://bugzilla.kernel.org/show_bug.cgi?id=29842


Mike Meehan <mjmeehan@gmail.com> changed:

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




--- Comment #8 from Mike Meehan <mjmeehan@gmail.com>  2011-04-12 01:22:03 ---
My system is also impacted, noticed since upgrading to Ubuntu Natty. Kernel
version 2.6.38-8.41-generic. Under no load my video card is reporting 82
degrees Celsius. The graphics card is a ATI Technologies Inc Barts PRO [ATI
Radeon HD 6800 Series]. I'm using the radeon kernel module with the radeondrmfb
frame buffer device.

I think it's related to putting the console in framebuffer mode, the card is
quiet in text mode.

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--- Comment #9 from Mike Meehan <mjmeehan@gmail.com>  2011-04-12 02:26:49 ---
# echo low > /sys/class/drm/card0/device/power_profile 
"resolves" the issue. Default power management settings for KMS put the card in
high performance mode on AC power.

# echo dynpm > /sys/class/drm/card0/device/power_method
Dynamic frequency scaling may work for you, though the screen flashes when
power levels change. Still seems to run too hot. I'm sticking to low for most
purposes.

This page was very helpful:
https://wiki.archlinux.org/index.php?title=ATI&oldid=135045

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[Bug 29842] Radeon runs very hot

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Igor Rudchenko <igor@starrain.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |igor@starrain.org




--- Comment #10 from Igor Rudchenko <igor@starrain.org>  2011-04-12 16:35:47 ---
This seems to be regression in my case.

Mobile FireGL V5250, temperature reading from thinkpad-acpi:

2.6.37.2, KMS, profile=default/high - temperature=67
2.6.37.2, KMS, profile=mid - temperature=64

2.6.38.2, KMS, profile=default/high - temperature=71
2.6.38.2, KMS, profile=mid - temperature=64

Some older kernels and windows with default clocks for GPU - temperature=67

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--- Comment #11 from Igor Rudchenko <igor@starrain.org>  2011-06-27 12:44:42 ---
High temperature of mobile radeon is back to normal with pcie_aspm=force.

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[Bug 29842] Radeon runs very hot

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Rafael J. Wysocki <rjw@sisk.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO




--- Comment #12 from Rafael J. Wysocki <rjw@sisk.pl>  2011-06-27 19:12:07 ---
Can you attach dmesg output from your system with the 3.0-rc4 kernel, please?

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[Bug 29842] Radeon runs very hot

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--- Comment #13 from Igor Rudchenko <igor@starrain.org>  2011-07-02 11:57:02 ---
Created an attachment (id=64452)
 --> (https://bugzilla.kernel.org/attachment.cgi?id=64452)
dmesg output for 3.0-rc5 kernel

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[Bug 29842] Radeon runs very hot

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--- Comment #14 from Igor Rudchenko <igor@starrain.org>  2012-02-22 16:56:23 ---
Commit "PCI: Rework ASPM disable code" added in 3.0.20 and 3.2.25 has worsened
the situation. I can't enable ASPM on ThinkPad T60 now even with
"pcie_aspm=force" kernel parameter. So radeon is always hot now.


3.2.4 kernel:

# dmesg | grep ASPM
[    0.000000] PCIe ASPM is forcibly enabled
[    0.161612] ACPI FADT declares the system doesn't support PCIe ASPM, so
disable it
[    3.612673] e1000e 0000:02:00.0: Disabling ASPM L0s L1

# lspci -vv -s 01:00.0 | grep ASPM
LnkCap:    Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <64ns, L1
<1us
LnkCtl:    ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+

# cat /proc/acpi/ibm/thermal
temperatures:    49 41 37 68 36 -128 33 -128 42 54 55 -128 -128 -128 -128 -128


3.2.5 kernel:

# dmesg | grep ASPM
[    0.000000] PCIe ASPM is forcibly enabled
[    0.161614] ACPI FADT declares the system doesn't support PCIe ASPM, so
disable it
[    3.523647] e1000e 0000:02:00.0: Disabling ASPM L0s L1

# lspci -vv -s 01:00.0 | grep ASPM
LnkCap:    Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <64ns, L1
<1us
LnkCtl:    ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+

# cat /proc/acpi/ibm/thermal
temperatures:    51 41 37 72 36 -128 33 -128 43 55 59 -128 -128 -128 -128 -128


Already tested kernels 3.2.7 and 3.3-rc4 - same problem.

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Re: [Bug 29842] Radeon runs very hot

[Pasi Kärkkäinen]

On Wed, Feb 22, 2012 at 04:56:26PM +0000, bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=29842
> 
> 
> 
> 
> 
> --- Comment #14 from Igor Rudchenko <igor@starrain.org>  2012-02-22 16:56:23 ---
> Commit "PCI: Rework ASPM disable code" added in 3.0.20 and 3.2.25 has worsened
> the situation. I can't enable ASPM on ThinkPad T60 now even with
> "pcie_aspm=force" kernel parameter. So radeon is always hot now.
> 

Are you sure it's about ASPM ? My radeon (On a HP laptop) is very hot because
of the unimplemented (and/or buggy) power management in the radeon driver!

I can make the temperature lower if I switch to power_profile "low" instead of the "default".

-- Pasi

> 
> 3.2.4 kernel:
> 
> # dmesg | grep ASPM
> [    0.000000] PCIe ASPM is forcibly enabled
> [    0.161612] ACPI FADT declares the system doesn't support PCIe ASPM, so
> disable it
> [    3.612673] e1000e 0000:02:00.0: Disabling ASPM L0s L1
> 
> # lspci -vv -s 01:00.0 | grep ASPM
> LnkCap:    Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <64ns, L1
> <1us
> LnkCtl:    ASPM L0s L1 Enabled; RCB 64 bytes Disabled- Retrain- CommClk+
> 
> # cat /proc/acpi/ibm/thermal
> temperatures:    49 41 37 68 36 -128 33 -128 42 54 55 -128 -128 -128 -128 -128
> 
> 
> 3.2.5 kernel:
> 
> # dmesg | grep ASPM
> [    0.000000] PCIe ASPM is forcibly enabled
> [    0.161614] ACPI FADT declares the system doesn't support PCIe ASPM, so
> disable it
> [    3.523647] e1000e 0000:02:00.0: Disabling ASPM L0s L1
> 
> # lspci -vv -s 01:00.0 | grep ASPM
> LnkCap:    Port #0, Speed 2.5GT/s, Width x16, ASPM L0s L1, Latency L0 <64ns, L1
> <1us
> LnkCtl:    ASPM Disabled; RCB 64 bytes Disabled- Retrain- CommClk+
> 
> # cat /proc/acpi/ibm/thermal
> temperatures:    51 41 37 72 36 -128 33 -128 43 55 59 -128 -128 -128 -128 -128
> 
> 
> Already tested kernels 3.2.7 and 3.3-rc4 - same problem.
> 
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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842





--- Comment #15 from Igor Rudchenko <igor@starrain.org>  2012-03-19 10:50:43 ---
Tested 3.3.0 kernel today and nothing changes. So I look deeper into ASPM
registers:

----

Windows XP and Linux kernel prior 2.6.38:

root complex
00:01.0 0xB0 == 0x03   (L1 and L0s)

video card
01:00.0 0x68 == 0x43   (L1 and L0s)

----

Linux 3.2.4:

00:01.0 0xB0 == 00   (L0 only)
01:00.0 0x68 == 40   (L0 only)

with pcie_aspm=force:

00:01.0 0xB0.b=43   (L1 and L0s)
01:00.0 0x68.b=43   (L1 and L0s)

----

Linux 3.2.5 and 3.3.0:

00:01.0 0xB0.b=40   (L0 only)
01:00.0 0x68.b=40   (L0 only)

with pcie_aspm=force:

00:01.0 0xB0.b=40   (L0 only)
01:00.0 0x68.b=40   (L0 only)

----

Also I have working ASPM for network devices (ethernet and wireless) with
Windows XP and kernels prior 2.6.38. But after 2.6.38 ASPM doesn't turn on even
with force key for network devices. And after another rework of ASPM code in
3.0.20, 3.2.5 and 3.3 kernels ASPM doesn't turn on for video card despite force
key.

I can enable ASPM on my devices with setpci:

setpci -s 00:01.0 0xB0.b=0x3:3
setpci -s 01:00.0 0x68.b=0x3:3

It works without problems, like it works prior 2.6.38 kernel. But, in my
opinion, ASPM handling code in Linux definately needs another rework.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Matthew Garrett <mjg59-kernel@srcf.ucam.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mjg59-kernel@srcf.ucam.org




--- Comment #16 from Matthew Garrett <mjg59-kernel@srcf.ucam.org>  2012-03-19 14:01:30 ---
Your network driver is explicitly turning off ASPM, so that's completely
unrelated to the core ASPM handling code. pcie_aspm=force will only enable ASPM
handling, it won't change the policy. If your BIOS didn't enable L1 and you
want L1 enabled, you have to set the policy to powersave.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842





--- Comment #17 from Igor Rudchenko <igor@starrain.org>  2012-03-19 16:35:11 ---
To Matthew Garrett:

I agree about network cards, but current situation with video card worries me
much. Prior 3.0.20, 3.2.5 and 3.3 kernels, users of ThinkPads T60 can simply
add key "pcie_aspm=force" to kernel and get ASPM working for their radeon card.
But after your last patch to ASPM code we can't get ASPM working simply by keys
or sysfs. "pcie_aspm=force" does nothing, but the ability to change policy. But
changing policy also does nothing! I tried to change to powersave and then
watch into registers - I got the same 0x40 values. So now direct change
registers with setpci is our only choice to get ASPM working. And so it should
not be.

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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842


Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alan@lxorguk.ukuu.org.uk
     Kernel Version|2.6.38-rc6                  |3.3




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[Bug 29842] Radeon runs very hot

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=29842

Alan <alan@lxorguk.ukuu.org.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Regression|No                          |Yes

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