Re: Deadlocks with multiple applications on AMD RX 460 and RX 550 - Update 2

From: "Christian König" <christian.koenig-5C7GfCeVMHo@public.gmane.org>
To: "Luís Mendes"
	<luis.p.mendes-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
	"Chunming Zhou" <zhoucm1-5C7GfCeVMHo@public.gmane.org>
Cc: alexander.deucher-5C7GfCeVMHo@public.gmane.org,
	amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: Re: Deadlocks with multiple applications on AMD RX 460 and RX 550 - Update 2
Date: Tue, 2 Jan 2018 14:17:22 +0100	[thread overview]
Message-ID: <d755cd12-1a1e-ce98-2b0d-ea4b5eafc483@amd.com> (raw)
In-Reply-To: <CAEzXK1odkDX-D3MOGHLFJuKNHh0RjSfsFL8PtB=6YQRDf1+Tkw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>

> when you refer to API traces, you're suggesting to strace
> kodi, or what do you mean?
What I meant was apitrace (https://github.com/apitrace/apitrace), but 
when even the lightdm login screen crashes than this won't be much helpful.

That strongly sounds like a ARM specific problem, maybe USWC doesn't 
work as it should? See function drm_arch_can_wc_memory() in the kernel 
source and try if it helps if you always return false.

Apart from that the only other explanation I have is that some system 
memory isn't accessible for the GPU while some other is working fine.

Please provide the output of "sudo cat /proc/iomem" to double check that.

Regards,
Christian.

Am 02.01.2018 um 14:09 schrieb Luís Mendes:
> Dear Mr. David, Mr. Christian,
>
> First of all, thanks for your replies!
>
> David, I will try the same software versions on x86 to see if I am
> able to replicate the problem on x86, but I suspect it is ARM
> specific... I'll report back when I have more details.
>
> Christian, I'll collect the data you've referred and will disable the
> power management. Regarding the mesa master version, I've tried it,
> and the problem just gets worse. With latest mesa, It easily locks up
> in lightdm login screen, or when navigating through the Ubuntu Mate
> menus, or with Kodi.  I've tested with mesa commit "radv: Implement
> binning on GFX9" - 6a36bfc64d2096aa338958c4605f5fc6372c07b8. Just one
> question... when you refer to API traces, you're suggesting to strace
> kodi, or what do you mean?
>
> Regards,
> Luís
>
> On Tue, Jan 2, 2018 at 2:51 AM, Chunming Zhou <zhoucm1@amd.com> wrote:
>> Did you try it on x86 board? Is there same issue?
>>
>> We should identify it is ARM specific or genera issue for amdgpu driver.
>>
>>
>> Thanks,
>>
>> David Zhou
>>
>>
>>

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