On Monday 20 October 2008 04:29:07 pm H. Peter Anvin wrote: > 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. A single root crystal is nice for us software guys. But it often also turns into a single point of failure, which the hardware guys are always trying to eliminate. So I think multiple crystals are inevitable for the really large machines. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
