From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 69723] GPU lockups with kernel 3.11.0 / 3.12-rc1 when dpm=1 on r600g (Cayman) Date: Tue, 26 Nov 2013 22:47:42 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0824965647==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 8EB8BFA5D7 for ; Tue, 26 Nov 2013 14:47:42 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0824965647== Content-Type: multipart/alternative; boundary="1385506062.CaB55882.15871"; charset="us-ascii" --1385506062.CaB55882.15871 Date: Tue, 26 Nov 2013 22:47:42 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=69723 --- Comment #38 from Alexandre Demers --- A couple of observations. I've forced power state to performance and performance state to high. Here is the result: [root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 0 dclk: 0 power level 2 sclk: 83000 mclk: 130000 vddc: 1060 vddci: 1150 Now, keeping this configuration, I launched a video relying on UVD. The result downclocks the core clock from 830 (probably limited to 800 as we know) to 725. [root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 54000 dclk: 40000 power level 2 sclk: 72500 mclk: 130000 vddc: 1060 vddci: 1150 However, if I don't force this power and performance states combination (letting it as balanced and auto or performance and auto), I have the following: [root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 54000 dclk: 40000 power level 0 sclk: 50000 mclk: 130000 vddc: 1000 vddci: 1150 [root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info uvd vclk: 54000 dclk: 40000 power level 2 sclk: 72500 mclk: 130000 vddc: 1060 vddci: 1150 As you can see, it will adapt to the needed performance state. - So, first question: is it expected to see a lowered sclk when UVD is active? - Second one: when the performance is changed automatically (auto), could we be triggering a performance state change too quickly? - Third one: it was previously said mclk is tied to vddci AND vddc. Wouldn't there be a chance we could encounter a problem here if vddc=1000 and not 1060 when running at full speed? - Last one: is there a way to monitor the GPU temperature and/or the GPU fan speed? (even at full speed when highly solicited, the fan is not running as fast as when dpm=0. I'm wondering if I'm not overheating from time to time). -- You are receiving this mail because: You are the assignee for the bug. --1385506062.CaB55882.15871 Date: Tue, 26 Nov 2013 22:47:42 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 38 on bug 69723 from 
A couple of observations. I've forced power state to performance and
performance state to high. Here is the result:
[root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info
uvd    vclk: 0 dclk: 0
power level 2    sclk: 83000 mclk: 130000 vddc: 1060 vddci: 1150

Now, keeping this configuration, I launched a video relying on UVD. The result
downclocks the core clock from 830 (probably limited to 800 as we know) to 725.
[root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info
uvd    vclk: 54000 dclk: 40000
power level 2    sclk: 72500 mclk: 130000 vddc: 1060 vddci: 1150

However, if I don't force this power and performance states combination
(letting it as balanced and auto or performance and auto), I have the
following:
[root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info
uvd    vclk: 54000 dclk: 40000
power level 0    sclk: 50000 mclk: 130000 vddc: 1000 vddci: 1150
[root@Xander device]# more /sys/kernel/debug/dri/64/radeon_pm_info
uvd    vclk: 54000 dclk: 40000
power level 2    sclk: 72500 mclk: 130000 vddc: 1060 vddci: 1150

As you can see, it will adapt to the needed performance state.

- So, first question: is it expected to see a lowered sclk when UVD is active?
- Second one: when the performance is changed automatically (auto), could we be
triggering a performance state change too quickly?
- Third one: it was previously said mclk is tied to vddci AND vddc. Wouldn't
there be a chance we could encounter a problem here if vddc=1000 and not 1060
when running at full speed?
- Last one: is there a way to monitor the GPU temperature and/or the GPU fan
speed? (even at full speed when highly solicited, the fan is not running as
fast as when dpm=0. I'm wondering if I'm not overheating from time to time).

You are receiving this mail because:
  • You are the assignee for the bug.
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