Re: Candidate Linux ABI for Intel AMX and hypothetical new related features
- From
- Len Brown <lenb@kernel.org>
- Date
- 2021-05-21 16:29:56
- Also in
- lkml
- Reply to
- Florian Weimer, 2021-05-17
On Mon, May 17, 2021 at 5:56 AM Florian Weimer [off-list ref] wrote:
How expensive is checking XCR0 via XGETBV instead, on the AMX path?
XGETBV takes about the same number of cycles as RDTSC (ie. it is
relatively fast)
Len Brown, Intel Open Source Technology Center