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@xxxxxxx>
Sent: Monday, October 12, 2020 3:14 PM
To: Patel, Mihir <Mihir.Patel@xxxxxxx>; amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Chauhan, Madhav <Madhav.Chauhan@xxxxxxx>; Deucher, Alexander
<Alexander.Deucher@xxxxxxx>; Surampalli, Kishore
<Kishore.Surampalli@xxxxxxx>; Kamliya, Prakash <Prakash.Kamliya@xxxxxxx>
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
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