On Fri, May 21, 2021 at 7:06 PM Dave Hansen [off-list ref] wrote:
On 5/21/21 3:07 PM, Len Brown wrote:
quoted
My concern about synchronous allocation is that it will be very easy
to abuse. programs and threads can ask for buffers they will never
use. With on-demand allocation, we allocate buffers only if they are
actually needed.
If someone wants to abuse the on-demand allocation, they will simply
write a single bit to an AMX register. That does *NOT* mean they will
actually execute an instruction that actually uses AMX to do something
meaningful.
In the face of abuse, I think the two approaches are very similar.
I didn't mean "abuse" in terms of malicious resource hogging.
I meant "abuse" in terms of unnecessarily using resources out of laziness.