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From: "Christian König" <christian.koenig@amd.com>
To: "Patel, Mihir" <Mihir.Patel@amd.com>,
	"amd-gfx@lists.freedesktop.org" <amd-gfx@lists.freedesktop.org>
Cc: "Chauhan, Madhav" <Madhav.Chauhan@amd.com>,
	"Deucher, Alexander" <Alexander.Deucher@amd.com>,
	"Kamliya, Prakash" <Prakash.Kamliya@amd.com>,
	"Surampalli, Kishore" <Kishore.Surampalli@amd.com>
Subject: Re: [PATCH v3] drm/amdgpu: Add debugfs entry for printing VM info
Date: Mon, 12 Oct 2020 12:54:11 +0200	[thread overview]
Message-ID: <3d9496e3-74ec-288d-4736-eb583d0f1c92@amd.com> (raw)
In-Reply-To: <24df1d90-04ad-e444-306d-7c2e16979b80@amd.com>

Am 12.10.20 um 12:50 schrieb Christian König:
> Am 12.10.20 um 12:00 schrieb Patel, Mihir:
>> [AMD Official Use Only - Internal Distribution Only]
>>
>>
>>
>> -----Original Message-----
>> From: Koenig, Christian <Christian.Koenig@amd.com>
>> Sent: Monday, October 12, 2020 3:14 PM
>> To: Patel, Mihir <Mihir.Patel@amd.com>; amd-gfx@lists.freedesktop.org
>> Cc: Chauhan, Madhav <Madhav.Chauhan@amd.com>; Deucher, Alexander 
>> <Alexander.Deucher@amd.com>; Surampalli, Kishore 
>> <Kishore.Surampalli@amd.com>; Kamliya, Prakash <Prakash.Kamliya@amd.com>
>> Subject: Re: [PATCH v3] drm/amdgpu: Add debugfs entry for printing VM 
>> info
>>
>> [SNIP]
>>> Hi Christian,
>>> One question regarding getting total allocations by app and also 
>>> swapped size for the app.
>>> Shouldn’t we print mapped entries as well to get total allocation by 
>>> the process ?
>>> Also which list would represent swapped memory?
>> None, we don't really have that information anywhere since we don't 
>> really have a swapped state.
>>
>> See when the application allocates a BO in VRAM the kernel driver is 
>> free to swap it out to GTT and still do command submission. Only when 
>> it is further swapped out to the CPU domain it is not accessible any 
>> more.
>>
>> So what you can do is to look at the BOs in the CPU domain, but this 
>> only gives you a certain hint on what's going on.
>>
>> Regards,
>> Christian.
>>
>> Thanks Christian for clarifying about swapped memory. How about total 
>> allocated size? Can't we print mapped BOs since amdgpu_gem_info is 
>> FILE/gem handle based?
>
> That's what you are already printing. E.g. if you sum up all the BOs 
> in all the different states then you have the total amount of 
> allocated memory for this process.
>
> Even if some of that memory isn't mapped into the VM.

Thinking a bit more about it, when you also look at 
bo->preferred_domains and compare that with the current domain you can 
also figure out if a BO is swapped out or not.

Christian.

>
> Christian.
>
>> Regards,
>> Mihir
>>> Thanks,
>>> Mihir
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

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  reply	other threads:[~2020-10-12 10:54 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-12  9:01 [PATCH v3] drm/amdgpu: Add debugfs entry for printing VM info Mihir Patel
2020-10-12  9:10 ` Christian König
2020-10-12  9:37   ` Patel, Mihir
2020-10-12  9:44     ` Christian König
2020-10-12 10:00       ` Patel, Mihir
2020-10-12 10:50         ` Christian König
2020-10-12 10:54           ` Christian König [this message]
2020-10-12 11:51             ` Patel, Mihir
2020-10-13 12:19             ` Chauhan, Madhav
2020-10-13 17:04               ` Christian König

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