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<div class="moz-cite-prefix">Am 21.03.2018 um 06:08 schrieb Marek
Olšák:<br>
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<div class="gmail_quote">On Tue, Mar 20, 2018 at 4:16 PM,
Christian König <span dir="ltr"><<a
href="mailto:christian.koenig@amd.com" target="_blank"
moz-do-not-send="true">christian.koenig@amd.com</a>></span>
wrote:<br>
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<div class="m_4643584645760816653moz-cite-prefix">That's
what I meant with use up the otherwise unused VRAM. I
don't see any disadvantage of always setting GTT as
second domain on APUs.<br>
<br>
My assumption was that we dropped this in userspace
for displayable surfaces, but Marek proved that wrong.<br>
<br>
So what we should do is actually to add GTT as
fallback to all BOs on APUs in Mesa and only make sure
that the kernel is capable of handling GTT with
optimal performance (e.g. have user huge pages etc..).<span
class="HOEnZb"><font color="#888888"><br>
</font></span></div>
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<div>VRAM|GTT is practically as good as GTT. VRAM with BO
priorities and eviction throttling is the true "VRAM|GTT".<br>
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<div>I don't know how else to make use of VRAM
intelligently.</div>
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Well why not set VRAM|GTT as default on APUs? That should still save
quite a bunch of moves even with throttling.<br>
<br>
I mean there really shouldn't be any advantage to use VRAM any more
except that we want to use it up as long as it is available.<br>
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Christian.<br>
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<div>Marek<br>
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