[Bug dynamic-link/20508] _dl_runtime_resolve_avx/_dl_runtime_profile_avx512 cause transition penalty

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=20508

--- Comment #2 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Florian Weimer from comment #1)
> I also expect that the present state of affairs makes all context switches
> slower because the kernel has to save and restore the AVX-512F state.

Context switches may not be impacted since XSAVEC and XSAVEOPT track
upper bits of vector registers.  But SSE transition tracks only YMM/ZMM
load instructions, not the bits in vector registers.

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