Re: Candidate Linux ABI for Intel AMX and hypothetical new related features
From: Len Brown
Date: Fri May 21 2021 - 12:29:56 EST
On Mon, May 17, 2021 at 5:56 AM Florian Weimer <fweimer@xxxxxxxxxx> 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