Re: [RFC patch 15/15] LTTng timestamp x86

H. Peter Anvin
2008-10-20T22:32:10Z

Linus Torvalds wrote:
>
> But it's not going to solve the "hey, I have 512 CPU's, they are all on
> different boards, and no, they are _not_ synchronized to one global
> clock!".
>
> That's why I'd suggest making _purely_ local time, and then aiming for
> something NTP-like. But maybe there are better solutions out there.
>

At the same time, it would definitely be nice to encourage vendors of
large SMP systems to provide a common root crystal (frequency standard)
for a single SMP domain. Preferrably a really good one, TCXO or better.

-hpa