Re: [PATCH 2/2] x86/microcode: Fix CPU synchronization routine

[Henrique de Moraes Holschuh]

On Wed, 14 Mar 2018, Borislav Petkov wrote:
> Also, since the update is serialized and it also takes a couple of
> thousand cycles per microcode engine, increase the exit timeout by the
> number of CPUs on the system.

Maybe on AMD it is that fast ;-)

Intel takes anything from twenty thousand cycles to several *million*
cycles per core, proportional to microcode update size.

-- 
  Henrique Holschuh